IS61LPS51218B, IS61LPS25636B, IS61LPS25632B, IS64LPS25636B,
IS61VPS/VVPS51218B, IS61VPS/VVPS25636B
256K x 36, 256K x 32, 512K x 18
9 Mb SYNCHRONOUS PIPELINED,
Single CYCLE DESELECT STATIC RAM
MAY 2017
FEATURES
DESCRIPTION
• Internal self-timed write cycle
The 9Mb product family features high-speed, low-power
synchronous static RAMs designed to provide burstable,
high-performance memory for communication and networking applications. The IS61LPS/VPS25636B and
IS64LPS25636B are organized as 262,144 words by
36 bits. The IS61LPS25632B is organized as 262,144
words by 32 bits. The IS61LPS/VPS51218B is organized
as 524,288 words by 18 bits. Fabricated with ISSI's advanced CMOS technology, the device integrates a 2-bit
burst counter, high-speed SRAM core, and high-drive
capability outputs into a single monolithic circuit. All
synchronous inputs pass through registers controlled by
a positive-edge-triggered single clock input.
• Individual Byte Write Control and Global Write
• Clock controlled, registered address, data and
control
• Burst sequence control using MODE input
• Three chip enable option for simple depth expansion and address pipelining
• Common data inputs and data outputs
• Auto Power-down during deselect
• Single cycle deselect
• Snooze MODE for reduced-power standby
• JTAG Boundary Scan for BGA package
• Power Supply
LPS: Vdd 3.3V (+ 5%), Vddq 3.3V/2.5V (+ 5%)
VPS: Vdd 2.5V (+ 5%), Vddq 2.5V (+ 5%)
VVPS: Vdd 1.8V (+ 5%), Vddq 1.8V (+ 5%)
• JEDEC 100-Pin QFP, 119-ball BGA, and 165ball BGA packages
• Lead-free available
FAST ACCESS TIME
Symbol
tkq
tkc
Parameter
Clock Access Time
Cycle Time
Frequency
Write cycles are internally self-timed and are initiated by
the rising edge of the clock input. Write cycles can be
one to four bytes wide as controlled by the write control
inputs.
Separate byte enables allow individual bytes to be written.
The byte write operation is performed by using the byte
write enable (BWE) input combined with one or more
individual byte write signals (BWx). In addition, Global
Write (GW) is available for writing all bytes at one time,
regardless of the byte write controls.
Bursts can be initiated with either ADSP (Address Status
Processor) or ADSC (Address Status Cache Controller)
input pins. Subsequent burst addresses can be generated internally and controlled by the ADV (burst address
advance) input pin.
The mode pin is used to select the burst sequence order, Linear burst is achieved when this pin is tied LOW.
Interleave burst is achieved when this pin is tied HIGH
or left floating.
250 200 166
2.6
3.1
3.8
4
5
6
250
200
166
Units
ns
ns
MHz
Copyright © 2017 Integrated Silicon Solution, Inc. All rights reserved. ISSI reserves the right to make changes to this specification and its products at any time without notice. ISSI assumes no
liability arising out of the application or use of any information, products or services described herein. Customers are advised to obtain the latest version of this device specification before relying on
any published information and before placing orders for products.
Integrated Silicon Solution, Inc. does not recommend the use of any of its products in life support applications where the failure or malfunction of the product can reasonably be expected to cause
failure of the life support system or to significantly affect its safety or effectiveness. Products are not authorized for use in such applications unless Integrated Silicon Solution, Inc. receives written
assurance to its satisfaction, that:
a.) the risk of injury or damage has been minimized;
b.) the user assume all such risks; and
c.) potential liability of Integrated Silicon Solution, Inc is adequately protected under the circumstances
Integrated Silicon Solution, Inc. — www.issi.com — 1-800-379-4774 1
Rev. B3
05/26/2017
IS61LPS51218B, IS61LPS25636B, IS61LPS25632B, IS64LPS25636B,
IS61VPS/VVPS51218B, IS61VPS/VVPS25636B
BLOCK DIAGRAM
MODE
A0
CLK
Q0
/CKE
BINARY
COUNTER
/ADV
/CE
/ADSC
/ADSP
/CLR
D
A0-x
x18: x=18
x36: x=17
Q1
A1
A0`
A1`
256Kx36;
512Kx18
Memory Array
Q
ADDRESS
REGISTER
/CE
CLK
/GW
/BWE
/BW(a-x)
x18:x=b,
x32,x36:x=d
D
Q
DQ(a-d)
BYTE WRITE
REGISTERS
CLK
INPUT
REGISTER
/CE
CE2
D
/CE2
ENABLE
REGISTERS
Q
CLK
OUTPUT
REGISTER
CLK
ZZ
Power
Down
DQ(a-x)
x18:x=b,
x32,x36:x=d
CLK
D
Q
ENABLE DELAY
REGISTERS
CLK
/OE
2
Integrated Silicon Solution, Inc. — www.issi.com — 1-800-379-4774
Rev. B3
05/26/2017
IS61LPS51218B, IS61LPS25636B, IS61LPS25632B, IS64LPS25636B,
IS61VPS/VVPS51218B, IS61VPS/VVPS25636B
165-pin BGA
119-pin BGA
165-Ball, 13x15 mm BGA
119-Ball, 14x22 mm BGA
Bottom view
Bottom View
Integrated Silicon Solution, Inc. — www.issi.com — 1-800-379-4774 3
Rev. B3
05/26/2017
IS61LPS51218B, IS61LPS25636B, IS61LPS25632B, IS64LPS25636B,
IS61VPS/VVPS51218B, IS61VPS/VVPS25636B
119 BGA PACKAGE PIN CONFIGURATION-256K x 36 (TOP VIEW)
1
2
3
4
5
6
7
A
VDDQ
A
A
ADSP
A
A
VDDQ
B
NC
CE2
A
ADSC
A
A
NC
C
NC
A
A
VDD
A
A
NC
D
DQc
DQPc
Vss
NC
Vss
DQPb
DQb
E
DQc
DQc
Vss
CE
Vss
DQb
DQb
F
VDDQ
DQc
Vss
OE
Vss
DQb
VDDQ
G
DQc
DQc
BWc
ADV
BWb
DQb
DQb
H
DQc
DQc
Vss
GW
Vss
DQb
DQb
J
VDDQ
VDD
NC
VDD
NC
VDD
VDDQ
K
DQd
DQd
Vss
CLK
Vss
DQa
DQa
L
DQd
DQd
BWd
NC
BWa
DQa
DQa
M
VDDQ
DQd
Vss
BWE
Vss
DQa
VDDQ
N
DQd
DQd
Vss
A1*
Vss
DQa
DQa
P
DQd
DQPd
Vss
A0*
Vss
DQPa
DQa
R
NC
A
MODE
VDD
NC
A
NC
T
NC
NC
A
A
A
NC
ZZ
U
VDDQ
TMS
TDI
TCK
TDO
NC
VDDQ
Note: * A0 and A1 are the two least significant bits (LSB) of the address field and set the internal burst counter if burst is desired.
PIN DESCRIPTIONS
Symbol
A
Pin Name
Address Inputs
Symbol
OE
Pin Name
Output Enable
A0, A1
ADV
ADSP
Synchronous Burst Address Inputs
Synchronous Burst Address
Advance
Address Status Processor
ZZ
Power Sleep Mode
MODE
Burst Sequence Selection
TCK, TDO
JTAG Pins
ADSC
GW
Address Status Controller
Global Write Enable
CLK
CE, CE2
Synchronous Clock
Synchronous Chip Select
BWx (x=a-d) Synchronous Byte Write Controls
BWE
4
Byte Write Enable
TMS, TDI
NC
No Connect
DQa-DQd
Data Inputs/Outputs
DQPa-Pd
Output Power Supply
Vdd
Power Supply
Vddq
I/O Power Supply
Vss
Ground
Integrated Silicon Solution, Inc. — www.issi.com — 1-800-379-4774
Rev. B3
05/26/2017
IS61LPS51218B, IS61LPS25636B, IS61LPS25632B, IS64LPS25636B,
IS61VPS/VVPS51218B, IS61VPS/VVPS25636B
119 BGA PACKAGE PIN CONFIGURATION
512Kx18 (TOP VIEW)
1
2
3
4
5
6
7
A
VDDQ
A
A
ADSP
A
A
VDDQ
B
NC
CE2
A
ADSC
A
A
NC
NC
C
NC
A
A
VDD
A
A
D
DQb
NC
Vss
NC
Vss
DQPa
E
NC
DQb
Vss
CE
Vss
NC
DQa
F
VDDQ
NC
Vss
OE
Vss
DQa
VDDQ
G
NC
DQb
BWb
ADV
Vss
NC
DQa
H
DQb
NC
Vss
GW
Vss
DQa
NC
J
VDDQ
VDD
NC
VDD
NC
VDD
VDDQ
K
NC
DQb
Vss
CLK
Vss
NC
DQa
L
DQb
NC
Vss
NC
BWa
DQa
NC
M
VDDQ
DQb
Vss
BWE
Vss
NC
VDDQ
N
DQb
NC
Vss
A 1*
Vss
DQa
NC
P
NC
DQPb
Vss
A 0*
Vss
NC
DQa
R
NC
A
MODE
VDD
NC
A
NC
T
NC
A
A
NC
A
A
ZZ
U
VDDQ
TMS
TDI
TCK
TDO
NC
VDDQ
NC
Note: * A0 and A1 are the two least significant bits (LSB) of the address field and set the internal burst counter if burst is desired.
PIN DESCRIPTIONS
Symbol
A
Pin Name
Address Inputs
Symbol
OE
Pin Name
Output Enable
A0, A1
ADV
ADSP
Synchronous Burst Address Inputs
Synchronous Burst Address
Advance
Address Status Processor
ZZ
Power Sleep Mode
MODE
Burst Sequence Selection
TCK, TDO
JTAG Pins
ADSC
GW
Address Status Controller
Global Write Enable
CLK
CE, CE2
Synchronous Clock
Synchronous Chip Select
BWx (x=a,b) Synchronous Byte Write Controls
BWE
Byte Write Enable
TMS, TDI
NC
No Connect
DQa-DQb
Data Inputs/Outputs
DQPa-Pb
Output Power Supply
Vdd
Power Supply
Vddq
I/O Power Supply
Vss
Ground
Integrated Silicon Solution, Inc. — www.issi.com — 1-800-379-4774 5
Rev. B3
05/26/2017
IS61LPS51218B, IS61LPS25636B, IS61LPS25632B, IS64LPS25636B,
IS61VPS/VVPS51218B, IS61VPS/VVPS25636B
165 BGA PACKAGE PIN CONFIGURATION
256K x 36 (TOP VIEW)
1
2
3
4
5
6
7
8
9
10
11
A
NC
A
CE
BWc
BWb
CE2
BWE
ADSC
ADV
A
NC
B
NC
A
CE2
BWd
BWa
CLK
GW
OE
ADSP
A
NC
C
DQPc
NC
Vddq
Vss
Vss
Vss
Vss
Vss
Vddq
NC
DQPb
D
DQc
DQc
Vddq
Vdd
Vss
Vss
Vss
Vdd
Vddq
DQb
DQb
DQb
E
DQc
DQc
Vddq
Vdd
Vss
Vss
Vss
Vdd
Vddq
DQb
F
DQc
DQc
Vddq
Vdd
Vss
Vss
Vss
Vdd
Vddq
DQb
DQb
G
DQc
DQc
Vddq
Vdd
Vss
Vss
Vss
Vdd
Vddq
DQb
DQb
H
NC
Vss
NC
Vdd
Vss
Vss
Vss
Vdd
NC
NC
ZZ
J
DQd
DQd
Vddq
Vdd
Vss
Vss
Vss
Vdd
Vddq
DQa
DQa
K
DQd
DQd
Vddq
Vdd
Vss
Vss
Vss
Vdd
Vddq
DQa
DQa
L
DQd
DQd
Vddq
Vdd
Vss
Vss
Vss
Vdd
Vddq
DQa
DQa
M
DQd
DQd
Vddq
Vdd
Vss
Vss
Vss
Vdd
Vddq
DQa
DQa
N
DQPd
NC
Vddq
Vss
NC
NC
NC
Vss
Vddq
P
NC
NC
A
A
TDI
A1*
TDO
A
A
A
A
R
MODE
NC
A
A
TMS
A0*
TCK
A
A
A
A
NC
DQPa
Note: * A0 and A1 are the two least significant bits (LSB) of the address field and set the internal burst counter if burst is desired.
PIN DESCRIPTIONS
Symbol
A
Pin Name
Address Inputs
Symbol
Pin Name
BWE
Byte Write Enable
A0, A1
ADV
ADSP
Synchronous Burst Address Inputs
Synchronous Burst Address
Advance
Address Status Processor
OE
Output Enable
ZZ
Power Sleep Mode
MODE
Burst Sequence Selection
ADSC
GW
Address Status Controller
Global Write Enable
JTAG Pins
CLK
CE, CE2, CE2
Synchronous Clock
Synchronous Chip Select
TCK, TDO
TMS, TDI
NC
DQx
DQPx
Vdd
Vddq
BWx (x=a,b,c,d) Synchronous Byte Write
Controls
Vss
6
No Connect
Data Inputs/Outputs
Data Inputs/Outputs
Power Supply
I/O Power Supply
Ground
Integrated Silicon Solution, Inc. — www.issi.com — 1-800-379-4774
Rev. B3
05/26/2017
IS61LPS51218B, IS61LPS25636B, IS61LPS25632B, IS64LPS25636B,
IS61VPS/VVPS51218B, IS61VPS/VVPS25636B
165 BGA PACKAGE PIN CONFIGURATION
512K x 18 (TOP VIEW)
1
2
3
4
5
6
7
8
9
10
11
A
NC
A
CE
BWb
NC
CE2
BWE
ADSC
ADV
A
A
B
NC
A
CE2
NC
BWa
CLK
GW
OE
ADSP
A
NC
C
NC
NC
Vddq
Vss
Vss
Vss
Vss
Vss
Vddq
NC
DQPa
D
NC
DQb
Vddq
Vdd
Vss
Vss
Vss
Vdd
Vddq
NC
DQa
E
NC
DQb
Vddq
Vdd
Vss
Vss
Vss
Vdd
Vddq
NC
DQa
F
NC
DQb
Vddq
Vdd
Vss
Vss
Vss
Vdd
Vddq
NC
DQa
G
NC
DQb
Vddq
Vdd
Vss
Vss
Vss
Vdd
Vddq
NC
DQa
H
NC
Vss
NC
Vdd
Vss
Vss
Vss
Vdd
NC
NC
ZZ
J
DQb
NC
Vddq
Vdd
Vss
Vss
Vss
Vdd
Vddq
DQa
NC
K
DQb
NC
Vddq
Vdd
Vss
Vss
Vss
Vdd
Vddq
DQa
NC
L
DQb
NC
Vddq
Vdd
Vss
Vss
Vss
Vdd
Vddq
DQa
NC
M
DQb
NC
Vddq
Vdd
Vss
Vss
Vss
Vdd
Vddq
DQa
NC
N
DQPb
NC
Vddq
Vss
NC
NC
NC
Vss
Vddq
NC
NC
P
NC
NC
A
A
TDI
A1*
TDO
A
A
A
A
R
MODE
NC
A
A
TMS
A0*
TCK
A
A
A
A
Note: * A0 and A1 are the two least significant bits (LSB) of the address field and set the internal burst counter if burst is desired.
PIN DESCRIPTIONS
Symbol
A
Pin Name
Address Inputs
Symbol
BWE
Byte Write Enable
A0, A1
ADV
ADSP
Synchronous Burst Address Inputs
Synchronous Burst Address
Advance
Address Status Processor
OE
Output Enable
ZZ
Power Sleep Mode
MODE
Burst Sequence Selection
ADSC
GW
Address Status Controller
Global Write Enable
JTAG Pins
CLK
CE, CE2, CE2
Synchronous Clock
Synchronous Chip Select
BWx (x=a,b)
Synchronous Byte Write
Controls
TCK, TDO
TMS, TDI
NC
DQx
DQPx
Vdd
Vddq
Vss
Pin Name
No Connect
Data Inputs/Outputs
Data Inputs/Outputs
3.3V/2.5V Power Supply
I/O Power Supply
Ground
Integrated Silicon Solution, Inc. — www.issi.com — 1-800-379-4774 7
Rev. B3
05/26/2017
IS61LPS51218B, IS61LPS25636B, IS61LPS25632B, IS64LPS25636B,
IS61VPS/VVPS51218B, IS61VPS/VVPS25636B
PIN CONFIGURATION
DQPc
100 99 98 97 96 95 94 93 92 91 90 89 88 87 86 85 84 83 82 81
1
80
2
79
3
78
4
77
5
76
6
75
7
74
8
73
9
72
10
71
11
70
12
69
13
68
14
67
15
66
16
65
17
64
18
63
19
62
20
61
21
60
22
59
23
58
24
57
25
56
26
55
27
54
28
53
29
52
30
51
31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50
DQPb
DQb
DQb
VDDQ
VSS
DQb
DQb
DQb
DQb
VSS
VDDQ
DQb
DQb
VSS
NC
VDD
ZZ
DQa
DQa
VDDQ
VSS
DQa
DQa
DQa
DQa
VSS
VDDQ
DQa
DQa
DQPa
DQPc
DQc
DQc
VDDQ
VSS
DQc
DQc
DQc
DQc
VSS
VDDQ
DQc
DQc
NC
VDD
NC
VSS
DQd
DQd
VDDQ
VSS
DQd
DQd
DQd
DQd
VSS
VDDQ
DQd
DQd
DQPd
100 99 98 97 96 95 94 93 92 91 90 89 88 87 86 85 84 83 82 81
1
80
2
79
3
78
4
77
5
76
6
75
7
74
8
73
9
72
10
71
11
70
12
69
13
68
14
67
15
66
16
65
17
64
18
63
19
62
20
61
21
60
22
59
23
58
24
57
25
56
26
55
27
54
28
53
29
52
30
51
31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50
DQPb
DQb
DQb
VDDQ
VSS
DQb
DQb
DQb
DQb
VSS
VDDQ
DQb
DQb
VSS
NC
VDD
ZZ
DQa
DQa
VDDQ
VSS
DQa
DQa
DQa
DQa
VSS
VDDQ
DQa
DQa
DQPa
MODE
A
A
A
A
A1
A0
NC
NC
VSS
VDD
NC
NC
A
A
A
A
A
A
A
MODE
A
A
A
A
A1
A0
NC
NC
VSS
VDD
NC
A
A
A
A
A
A
A
A
DQc
DQc
VDDQ
VSS
DQc
DQc
DQc
DQc
VSS
VDDQ
DQc
DQc
NC
VDD
NC
VSS
DQd
DQd
VDDQ
VSS
DQd
DQd
DQd
DQd
VSS
VDDQ
DQd
DQd
DQPd
A
A
CE
CE2
BWd
BWc
BWb
BWa
A
VDD
VSS
CLK
GW
BWE
OE
ADSC
ADSP
ADV
A
A
A
A
CE
CE2
BWd
BWc
BWb
BWa
CE2
VDD
VSS
CLK
GW
BWE
OE
ADSC
ADSP
ADV
A
A
100-Pin QFP (256K x 36)
(2 Chip-Enable option)
(3 Chip-Enable option)
PIN DESCRIPTIONS
A0, A1
A
Synchronous Address Inputs. These
pins must tied to the two LSBs of the
address bus.
Synchronous Address Inputs
ADSC
Synchronous Controller Address Status
ADSP
Synchronous Processor Address Status
ADV
Synchronous Burst Address Advance
BWa-BWd
Synchronous Byte Write Enable
BWE
Synchronous Byte Write Enable
CE, CE2, CE2 Synchronous Chip Enable
CLK
8
DQa-DQd
Synchronous Data Input/Output
DQPa-DQPd
Parity Data Input/Output
GW
MODE
Synchronous Global Write Enable
Burst Sequence Mode Selection
OE
Output Enable
Vdd
Power Supply
Vddq
Vss
ZZ
I/O Power Supply
Ground
Snooze Enable
Synchronous Clock
Integrated Silicon Solution, Inc. — www.issi.com — 1-800-379-4774
Rev. B3
05/26/2017
IS61LPS51218B, IS61LPS25636B, IS61LPS25632B, IS64LPS25636B,
IS61VPS/VVPS51218B, IS61VPS/VVPS25636B
PIN CONFIGURATION
A
A
CE
CE2
BWd
BWc
BWb
BWa
CE2
VDD
VSS
CLK
GW
BWE
OE
ADSC
ADSP
ADV
A
A
100-Pin QFP (256K x 32)
100 99 98 97 96 95 94 93 92 91 90 89 88 87 86 85 84 83 82 81
1
80
2
79
3
78
4
77
5
76
6
75
7
74
8
73
9
72
10
71
11
70
12
69
13
68
14
67
15
66
16
65
17
64
18
63
19
62
20
61
21
60
22
59
23
58
24
57
25
56
26
55
27
54
28
53
29
52
30
51
31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50
NC
DQb
DQb
VDDQ
VSS
DQb
DQb
DQb
DQb
VSS
VDDQ
DQb
DQb
VSS
NC
VDD
ZZ
DQa
DQa
VDDQ
VSS
DQa
DQa
DQa
DQa
VSS
VDDQ
DQa
DQa
NC
MODE
A
A
A
A
A1
A0
NC
NC
VSS
VDD
NC
A
A
A
A
A
A
A
A
NC
DQc
DQc
VDDQ
VSS
DQc
DQc
DQc
DQc
VSS
VDDQ
DQc
DQc
NC
VDD
NC
VSS
DQd
DQd
VDDQ
VSS
DQd
DQd
DQd
DQd
VSS
VDDQ
DQd
DQd
NC
(3 Chip-Enable option)
PIN DESCRIPTIONS
A0, A1
A
Synchronous Address Inputs. These
pins must tied to the two LSBs of the
address bus.
Synchronous Address Inputs
ADSC
Synchronous Controller Address Status
ADSP
Synchronous Processor Address Status
ADV
Synchronous Burst Address Advance
BWa-BWd
Synchronous Byte Write Enable
BWE
Synchronous Byte Write Enable
DQa-DQd
GW
MODE
Synchronous Data Input/Output
Synchronous Global Write Enable
Burst Sequence Mode Selection
OE
Output Enable
Vdd
Power Supply
Vddq
Vss
ZZ
I/O Power Supply
Ground
Snooze Enable
CE, CE2, CE2 Synchronous Chip Enable
CLK
Synchronous Clock
Integrated Silicon Solution, Inc. — www.issi.com — 1-800-379-4774 9
Rev. B3
05/26/2017
IS61LPS51218B, IS61LPS25636B, IS61LPS25632B, IS64LPS25636B,
IS61VPS/VVPS51218B, IS61VPS/VVPS25636B
PIN CONFIGURATION
A
NC
NC
VDDQ
VSS
NC
DQPa
DQa
DQa
VSS
VDDQ
DQa
DQa
VSS
NC
VDD
ZZ
DQa
DQa
VDDQ
VSS
DQa
DQa
NC
NC
VSS
VDDQ
NC
NC
NC
100 99 98 97 96 95 94 93 92 91 90 89 88 87 86 85 84 83 82 81
1
80
2
79
3
78
4
77
5
76
6
75
7
74
8
73
9
72
10
71
11
70
12
69
13
68
14
67
15
66
16
65
17
64
18
63
19
62
20
61
21
60
22
59
23
58
24
57
25
56
26
55
27
54
28
53
29
52
30
51
31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50
NC
NC
NC
VDDQ
VSS
NC
NC
DQb
DQb
VSS
VDDQ
DQb
DQb
NC
VDD
NC
VSS
DQb
DQb
VDDQ
VSS
DQb
DQb
DQPb
NC
VSS
VDDQ
NC
NC
NC
A
NC
NC
VDDQ
VSS
NC
DQPa
DQa
DQa
VSS
VDDQ
DQa
DQa
VSS
NC
VDD
ZZ
DQa
DQa
VDDQ
VSS
DQa
DQa
NC
NC
VSS
VDDQ
NC
NC
NC
MODE
A
A
A
A
A1
A0
NC
NC
VSS
VDD
NC
NC
A
A
A
A
A
A
A
100 99 98 97 96 95 94 93 92 91 90 89 88 87 86 85 84 83 82 81
1
80
2
79
3
78
4
77
5
76
6
75
7
74
8
73
9
72
10
71
11
70
12
69
13
68
14
67
15
66
16
65
17
64
18
63
19
62
20
61
21
60
22
59
23
58
24
57
25
56
26
55
27
54
28
53
29
52
30
51
31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50
MODE
A
A
A
A
A1
A0
NC
NC
VSS
VDD
NC
A
A
A
A
A
A
A
A
NC
NC
NC
VDDQ
VSS
NC
NC
DQb
DQb
VSS
VDDQ
DQb
DQb
NC
VDD
NC
VSS
DQb
DQb
VDDQ
VSS
DQb
DQb
DQPb
NC
VSS
VDDQ
NC
NC
NC
A
A
CE
CE2
NC
NC
BWb
BWa
A
VDD
VSS
CLK
GW
BWE
OE
ADSC
ADSP
ADV
A
A
A
A
CE
CE2
NC
NC
BWb
BWa
CE2
VDD
VSS
CLK
GW
BWE
OE
ADSC
ADSP
ADV
A
A
100-Pin QFP (512K x 18)
(3 Chip-Enable Option)
(2 Chip-Enable Option)
PIN DESCRIPTIONS
A0, A1
Synchronous Address Inputs. These
pins must tied to the two LSBs of the
address bus.
A
Synchronous Address Inputs
Synchronous Controller Address Status
ADSC
ADSP
Synchronous Processor Address Status
ADV
Synchronous Burst Address Advance
BWa-BWb
Synchronous Byte Write Enable
BWE
Synchronous Byte Write Enable
CE, CE2, CE2 Synchronous Chip Enable
CLK
Synchronous Clock
DQa-DQb
Synchronous Data Input/Output
10
DQPa-DQPb
Parity Data I/O; DQPa is parity for
DQa1-8; DQPb is parity for DQb1-8
GW
MODE
Synchronous Global Write Enable
Burst Sequence Mode Selection
OE
Vdd
Vddq
Vss
ZZ
Output Enable
Power Supply
I/O Power Supply
Ground
Snooze Enable
Integrated Silicon Solution, Inc. — www.issi.com — 1-800-379-4774
Rev. B3
05/26/2017
IS61LPS51218B, IS61LPS25636B, IS61LPS25632B, IS64LPS25636B,
IS61VPS/VVPS51218B, IS61VPS/VVPS25636B
TRUTH TABLE(1-8)
OPERATION ADDRESS
CE CE2 CE2 ZZ ADSP ADSC ADV
Deselect Cycle, Power-Down
None
H
X
X
L
X
L
X
Deselect Cycle, Power-Down
None
L
X
L
L
L
X
X
Deselect Cycle, Power-Down
None
L
H
X
L
L
X
X
Deselect Cycle, Power-Down
None
L
X
L
L
H
L
X
Deselect Cycle, Power-Down
None
L
H
X
L
H
L
X
Snooze Mode, Power-Down
None
X
X
X
H
X
X
X
Read Cycle, Begin Burst
External
L
L
H
L
L
X
X
Read Cycle, Begin Burst
External
L
L
H
L
L
X
X
Write Cycle, Begin Burst
External
L
L
H
L
H
L
X
Read Cycle, Begin Burst
External
L
L
H
L
H
L
X
Read Cycle, Begin Burst
External
L
L
H
L
H
L
X
Read Cycle, Continue Burst
Next
X
X
X
L
H
H
L
Read Cycle, Continue Burst
Next
X
X
X
L
H
H
L
Read Cycle, Continue Burst
Next
H
X
X
L
X
H
L
Read Cycle, Continue Burst
Next
H
X
X
L
X
H
L
Write Cycle, Continue Burst
Next
X
X
X
L
H
H
L
Write Cycle, Continue Burst
Next
H
X
X
L
X
H
L
Read Cycle, Suspend Burst
Current
X
X
X
L
H
H
H
Read Cycle, Suspend Burst
Current
X
X
X
L
H
H
H
Read Cycle, Suspend Burst
Current
H
X
X
L
X
H
H
Read Cycle, Suspend Burst
Current
H
X
X
L
X
H
H
Write Cycle, Suspend Burst
Current
X
X
X
L
H
H
H
Write Cycle, Suspend Burst
Current
H
X
X
L
X
H
H
WRITE OE CLK DQ
X
X
L-H
High-Z
X
X
L-H
High-Z
X
X
L-H
High-Z
X
X
L-H
High-Z
X
X
L-H
High-Z
X
X
X
High-Z
X
L
L-H
Q
X
H
L-H
High-Z
L
X
L-H
D
H
L
L-H
Q
H
H
L-H
High-Z
H
L
L-H
Q
H
H
L-H
High-Z
H
L
L-H
Q
H
H
L-H
High-Z
L
X
L-H
D
L
X
L-H
D
H
L
L-H
Q
H
H
L-H
High-Z
H
L
L-H
Q
H
H
L-H
High-Z
L
X
L-H
D
L
X
L-H
D
NOTE:
1. X means “Don’t Care.” H means logic HIGH. L means logic LOW.
2. For WRITE, L means one or more byte write enable signals (BWa-d) and BWE are LOW or GW is LOW. WRITE = H for all
BWx, BWE, GW HIGH.
3. BWa enables WRITEs to DQa’s and DQPa. BWb enables WRITEs to DQb’s and DQPb. BWc enables WRITEs to DQc’s and
DQPc. BWd enables WRITEs to DQd’s and DQPd. DQPa and DQPb are available on the x18 version. DQPa-DQPd are available on the x36 version.
4. All inputs except OE and ZZ must meet setup and hold times around the rising edge (LOW to HIGH) of CLK.
5. Wait states are inserted by suspending burst.
6. For a WRITE operation following a READ operation, OE must be HIGH before the input data setup time and held HIGH during
the input data hold time.
7. This device contains circuitry that will ensure the outputs will be in High-Z during power-up.
8. ADSP LOW always initiates an internal READ at the L-H edge of CLK. A WRITE is performed by setting one or more byte write
enable signals and BWE LOW or GW LOW for the subsequent L-H edge of CLK. See WRITE timing diagram for clarification.
PARTIAL TRUTH TABLE
Function
GW BWE BWa BWb BWc BWd
Read
H
H
X
X
X
X
Read
H
L
H
H
H
H
Write Byte 1
H
L
L
H
H
H
Write All Bytes
H
L
L
L
L
L
Write All Bytes
L
X
X
X
X
X
Integrated Silicon Solution, Inc. — www.issi.com — 1-800-379-4774 11
Rev. B3
05/26/2017
IS61LPS51218B, IS61LPS25636B, IS61LPS25632B, IS64LPS25636B,
IS61VPS/VVPS51218B, IS61VPS/VVPS25636B
Power Up Sequence
Vddq → Vdd1 → I/O Pins2
Notes:
1. Vdd can be applied at the same time as Vddq
2. Applying I/O inputs is recommended after Vddq is ready. The inputs of the I/O pins can be applied at the
same time as Vddq provided Vih (level of I/O pins) is lower than Vddq.
Power-UP INITIALIZATION TIMING
VDD
power > 1ms
VDD
VDDQ
Device Initialization
Device ready for
normal operation
INTERLEAVED BURST ADDRESS TABLE (MODE = Vdd or No Connect)
External Address
A1 A0
00
01
10
11
1st Burst Address
A1 A0
01
00
11
10
2nd Burst Address
A1 A0
10
11
00
01
3rd Burst Address
A1 A0
11
10
01
00
LINEAR BURST ADDRESS TABLE (MODE = Vss)
0,0
A1', A0' = 1,1
12
0,1
1,0
Integrated Silicon Solution, Inc. — www.issi.com — 1-800-379-4774
Rev. B3
05/26/2017
IS61LPS51218B, IS61LPS25636B, IS61LPS25632B, IS64LPS25636B,
IS61VPS/VVPS51218B, IS61VPS/VVPS25636B
ABSOLUTE MAXIMUM RATINGS(1)
Symbol
Tstg
Pd
Iout
Vin, Vout
Vin
Vdd
Parameter
LPS Value
Storage Temperature
–55 to +150
Power Dissipation
1.6
Output Current (per I/O)
100
Voltage Relative to Vss for I/O Pins
–0.5 to Vddq + 0.5
Voltage Relative to Vss for
–0.5 to Vdd + 0.5
for Address and Control Inputs
Voltage on Vdd Supply Relative to Vss –0.5 to Vdd + 0.5
VPS/VVPS Value
–55 to +150
1.6
100
–0.5 to Vddq + 0.3
–0.5 to Vdd + 0.3
Unit
°C
W
mA
V
V
–0.3 to Vdd + 0.3
V
Notes:
1. Stress greater than those listed under ABSOLUTE MAXIMUM RATINGS may cause permanent damage to the device.
This is a stress rating only and functional operation of the device at these or any other conditions above those indicated in
the operational sections of this specification is not implied. Exposure to absolute maximum rating conditions for extended
periods may affect reliability.
2. This device contains circuity to protect the inputs against damage due to high static voltages or electric fields; however,
precautions may be taken to avoid application of any voltage higher than maximum rated voltages to this high-impedance
circuit.
3. This device contains circuitry that will ensure the output devices are in High-Z at power up.
OPERATING RANGE (IS61LPSXXXXX)
Range
Commercial
Industrial
Ambient Temperature
0°C to +70°C
–40°C to +85°C
Vdd Vddq
3.3V + 5%
3.3V / 2.5V + 5%
3.3V + 5%
3.3V / 2.5V + 5%
OPERATING RANGE (IS61VPSXXXXX)
Range
Commercial
Industrial
Ambient Temperature
0°C to +70°C
–40°C to +85°C
Vdd Vddq
2.5V + 5%
2.5V + 5%
2.5V + 5%
2.5V + 5%
OPERATING RANGE (IS61VVPSXXXXX)
Range
Commercial
Industrial
Ambient Temperature
0°C to +70°C
–40°C to +85°C
Vdd Vddq
1.8V + 5%
1.8V + 5%
1.8V + 5%
1.8V + 5%
OPERATING RANGE (IS64LPSXXXXX)
Range
Automotive
Ambient Temperature
–40°C to +125°C
Vdd Vddq
3.3V + 5%
3.3V / 2.5V + 5%
Integrated Silicon Solution, Inc. — www.issi.com — 1-800-379-4774 13
Rev. B3
05/26/2017
IS61LPS51218B, IS61LPS25636B, IS61LPS25632B, IS64LPS25636B,
IS61VPS/VVPS51218B, IS61VPS/VVPS25636B
DC ELECTRICAL CHARACTERISTICS (Over Operating Range) 1, 2, 3
3.3V
Symbol Parameter
Test Conditions
Min. Max.
Voh
Output HIGH Voltage
Ioh = –4.0 mA (3.3V)
2.4 —
Ioh = –1.0 mA (2.5V, 1.8V)
Vol
Output LOW Voltage
Iol = 8.0 mA (3.3V)
— 0.4
Iol = 1.0 mA (2.5V, 1.8V)
Vih
Input HIGH Voltage
2.0 Vdd + 0.3
Vil
Input LOW Voltage
-0.3 0.8
(1)
Ili
Input Leakage Current
Vss ≤ Vin ≤ Vdd
-5 5
Ilo
Output Leakage Current Vss ≤ Vout ≤ Vddq,
-5 5
OE = Vih
2.5V 1.8V
Min. Max.
Min. Max.
2.0 —
Vddq - 0.4 —
— 0.4
—
0.4
Unit
V
V
1.7 Vdd + 0.3 0.6Vdd Vdd + 0.3 V
-0.3 0.7
-0.3 0.3Vdd
V
-5 5
-5
5
µA
-5 5
-5
5
µA
Notes:
1. All voltages referenced to ground.
2. Overshoot:
3.3V and 2.5V: Vih (AC) ≤ Vdd + 1.5V (Pulse width less than tkc /2)
1.8V: Vih (AC) ≤ Vdd + 0.5V (Pulse width less than tkc /2)
3. Undershoot:
3.3V and 2.5V: Vil (AC) ≥ -1.5V (Pulse width less than tkc /2)
1.8V: Vil (AC) ≥ -0.5V (Pulse width less than tkc /2)
POWER SUPPLY CHARACTERISTICS(1) (Over Operating Range)
Symbol Parameter
Icc
AC Operating
Supply Current
Isb
Standby Current
TTL Input
Isbi
Standby Current
CMOS Input
Test Conditions
Temp. range
Device Selected,
Com.
OE = Vih, ZZ ≤ Vil, Ind.
All Inputs ≤ 0.2V or ≥ Vdd – 0.2V, Auto
Cycle Time ≥ tkc min.
Device Deselected,
Com.
Vdd = Max.,
Ind.
All Inputs ≤ Vil or ≥ Vih,
Auto
ZZ ≤ Vil, f = Max.
Device Deselected,
Com.
Vdd = Max.,
Ind.
Vin ≤ Vss + 0.2V or ≥Vdd – 0.2V Auto
f = 0
-250 -200
MAX MAX
x18
x36
x18 x36
Unit
185 185
155 155 mA
190 190 160 160
170 170
75
80
-
75
80
-
75
75
mA
80 80
85
85
55
60
-
55
60
-
55
60
65
55
60
65
mA
Note:
1. MODE pin has an internal pullup and should be tied to Vdd or Vss. It exhibits ±100µA maximum leakage current when tied to ≤
Vss + 0.2V or ≥ Vdd – 0.2V.
14
Integrated Silicon Solution, Inc. — www.issi.com — 1-800-379-4774
Rev. B3
05/26/2017
IS61LPS51218B, IS61LPS25636B, IS61LPS25632B, IS64LPS25636B,
IS61VPS/VVPS51218B, IS61VPS/VVPS25636B
CAPACITANCE(1,2)
Symbol
Cin
Cout
Parameter
Input Capacitance
Input/Output Capacitance
Conditions
Vin = 0V
Vout = 0V
Max.
6
8
Unit
pF
pF
Notes:
1. Tested initially and after any design or process changes that may affect these parameters.
2. Test conditions: Ta = 25°C, f = 1 MHz, Vdd = 3.3V.
3.3V I/O AC TEST CONDITIONS
Parameter
Input Pulse Level
Input Rise and Fall Times
Input and Output Timing
and Refe rence Level
Output Load
Unit
0V to 3.0V
1.5 ns
1.5V
See Figures 1 and 2
AC TEST LOADS
317 Ω
3.3V
ZO = 50Ω
Output
50Ω
1.5V
Figure 1
OUTPUT
5 pF
Including
jig and
scope
351 Ω
Figure 2
Integrated Silicon Solution, Inc. — www.issi.com — 1-800-379-4774 15
Rev. B3
05/26/2017
IS61LPS51218B, IS61LPS25636B, IS61LPS25632B, IS64LPS25636B,
IS61VPS/VVPS51218B, IS61VPS/VVPS25636B
2.5V I/O AC TEST CONDITIONS
Parameter
Input Pulse Level
Input Rise and Fall Times
Input and Output Timing
and Reference Level
Output Load
Unit
0V to 2.5V
1.5 ns
1.25V
See Figures 3 and 4
2.5 I/O OUTPUT LOAD EQUIVALENT
1,667 Ω
2.5V
ZO = 50Ω
Output
50Ω
OUTPUT
1,538 Ω
5 pF
Including
jig and
scope
1.25V
Figure 3
Figure 4
1.8V I/O AC TEST CONDITIONS
Parameter
Input Pulse Level
Input Rise and Fall Times
Input and Output Timing
and Reference Level
Output Load
Unit
0V to 1.8V
1.5 ns
0.9V
See Figures 5 and 6
1.8 I/O OUTPUT LOAD EQUIVALENT
1K Ω
1.8V
ZO = 50Ω
Output
50Ω
0.9V
Figure 5
16
OUTPUT
5 pF
Including
jig and
scope
1K Ω
Figure 6
Integrated Silicon Solution, Inc. — www.issi.com — 1-800-379-4774
Rev. B3
05/26/2017
IS61LPS51218B, IS61LPS25636B, IS61LPS25632B, IS64LPS25636B,
IS61VPS/VVPS51218B, IS61VPS/VVPS25636B
READ/WRITE CYCLE SWITCHING CHARACTERISTICS (Over Operating Range)
-250 -200 -166
Symbol Parameter
Min. Max.
Min. Max.
Min. Max.
fmax
Clock Frequency
— 250
— 200
— 166
tkc
Cycle Time
4.0 —
5 —
6 —
tkh
Clock High Time
1.7 —
2 —
2.4 —
tkl
Clock Low Time
1.7 —
2 —
2.3 —
tkq
Clock Access Time
— 2.6
— 3.1
— 3.8
(2)
tkqx
Clock High to Output Invalid
0.8 —
1.5 —
1.5 —
(2,3)
tkqlz Clock High to Output Low-Z
0.8 —
1 —
1.5 —
tkqhz(2,3) Clock High to Output High-Z
— 2.6
— 3.0
3.5 —
toeq
Output Enable to Output Valid
— 2.6
— 3.1
3.5 —
(2,3)
toelz Output Enable to Output Low-Z
0 —
0 —
0 —
(2,3)
toehz Output Disable to Output High-Z
— 2.6
— 3.0
3.5 —
tas
tss
tws
tces
tavs
tds
tah
tsh
twh
tceh
tavh
tdh
tpower(4)
Address Setup Time
Address Status Setup Time
Read/Write Setup Time
Chip Enable Setup Time
Address Advance Setup Time
Data Setup Time
Address Hold Time
Address Status Hold Time
Write Hold Time
Chip Enable Hold Time
Address Advance Hold Time
Data Hold Time
Vdd (typical) to First Access
1.2
1.2
1.2
1.2
1.2
1.2
0.3
0.3
0.3
0.3
0.3
0.3
1
—
—
—
—
—
—
—
—
—
—
—
—
—
1.4
1.4
1.4
1.4
1.4
1.4
0.4
0.4
0.4
0.4
0.4
0.4
1
—
—
—
—
—
—
—
—
—
—
—
—
—
1.7
1.7
1.7
1.7
1.7
1.7
0.7
0.7
0.7
0.7
0.7
0.7
1
—
—
—
—
—
—
—
—
—
—
—
—
—
Unit
MHz
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ms
Note:
1. Configuration signal MODE is static and must not change during normal operation.
2. Guaranteed but not 100% tested. This parameter is periodically sampled.
3. Tested with load in Figure 2.
4. tpower is the time that the power needs to be supplied above Vdd (min) initially before READ or WRITE operation can be
initiated.
Integrated Silicon Solution, Inc. — www.issi.com — 1-800-379-4774 17
Rev. B3
05/26/2017
IS61LPS51218B, IS61LPS25636B, IS61LPS25632B, IS64LPS25636B,
IS61VPS/VVPS51218B, IS61VPS/VVPS25636B
READ CYCLE TIMING
tKC
CLK
tSS
tSH
tKH
tKL
ADSP is blocked by CE inactive
ADSP
tSS
tSH
ADSC initiate read
ADSC
tAVH
tAVS
Suspend Burst
tSS
tSH
ADV
tAS
Address
tAH
RD1
RD3
RD2
tWS
tWH
tWS
tWH
GW
BWE
BWx
tCES
tCEH
tCES
tCEH
tCES
tCEH
CE Masks ADSP
CE
Unselected with CE2
CE2 and CE2 only sampled with ADSP or ADSC
CE2
CE2
tOEHZ
tOEQ
OE
tKQX
tOELZ
DATAOUT
High-Z
1a
2a
2b
2c
tKQLZ
2d
tKQHZ
tKQ
DATAIN
High-Z
Pipelined Read
Single Read
18
Burst Read
Unselected
Integrated Silicon Solution, Inc. — www.issi.com — 1-800-379-4774
Rev. B3
05/26/2017
IS61LPS51218B, IS61LPS25636B, IS61LPS25632B, IS64LPS25636B,
IS61VPS/VVPS51218B, IS61VPS/VVPS25636B
WRITE CYCLE TIMING
tKC
CLK
tSS
tSH
tKH
tKL
ADSP is blocked by CE inactive
ADSP
ADSC initiate Write
ADSC
ADV must be inactive for ADSP Write tAVS
tAVH
tSS
tSH
ADV
tAS
Address
tAH
WR1
WR3
WR2
tWS
tWH
tWS
tWH
tWS
tWH
GW
BWE
WR1
BWx
tCES
tCEH
tCES
tCEH
tCES
tCEH
tWS
tWH
WR2
WR3
CE Masks ADSP
CE
Unselected with CE2
CE2 and CE2 only sampled with ADSP or ADSC
CE2
CE2
OE
DATAOUT
High-Z
tDS
DATAIN
High-Z
Single Write
tDH
1a
BW4-BW1 only are applied to first cycle of WR2
2a
2b
2c
2d
Burst Write
3a
Write
Unselected
Integrated Silicon Solution, Inc. — www.issi.com — 1-800-379-4774 19
Rev. B3
05/26/2017
IS61LPS51218B, IS61LPS25636B, IS61LPS25632B, IS64LPS25636B,
IS61VPS/VVPS51218B, IS61VPS/VVPS25636B
SNOOZE MODE ELECTRICAL CHARACTERISTICS
Symbol Parameter
Conditions
Isb2
Current during SNOOZE MODE ZZ ≥ Vih
tpds
ZZ active to input ignored
tpus
ZZ inactive to input sampled
tzzi
ZZ active to SNOOZE current
trzzi
ZZ inactive to exit SNOOZE current
Temperature
Range
Com.
Ind.
Auto.
Min. Max.
—
—
—
—
2
—
0
20
25
35
2
—
2
—
Unit
mA
cycle
cycle
cycle
ns
SNOOZE MODE TIMING
CLK
tPDS
ZZ setup cycle
tPUS
ZZ recovery cycle
ZZ
tZZI
Isupply
ISB2
tRZZI
All Inputs
(except ZZ)
Deselect or Read Only
Deselect or Read Only
Normal
operation
cycle
Outputs
(Q)
High-Z
Don't Care
20
Integrated Silicon Solution, Inc. — www.issi.com — 1-800-379-4774
Rev. B3
05/26/2017
IS61LPS51218B, IS61LPS25636B, IS61LPS25632B, IS64LPS25636B,
IS61VPS/VVPS51218B, IS61VPS/VVPS25636B
IEEE 1149.1 Serial Boundary Scan (JTAG)
Test Access Port (TAP) - Test Clock
The serial boundary scan Test Access Port (TAP) is only
available in the BGA package. (The QFP package not
available.) This port operates in accordance with IEEE
Standard 1149.1-1900, but does not include all functions
required for full 1149.1 compliance. These functions from
the IEEE specification are excluded because they place
added delay in the critical speed path of the SRAM. The
TAP controller operates in a manner that does not conflict
with the performance of other devices using 1149.1 fully
compliant TAPs.
The test clock is only used with the TAP controller. All inputs
are captured on the rising edge of TCK and outputs are
driven from the falling edge of TCK.
Disabling the JTAG Feature
The TDI pin is used to serially input information to the
registers and can be connected to the input of any register. The register between TDI and TDO is chosen by the
instruction loaded into the TAP instruction register. For
information on instruction register loading, see the TAP
Controller State Diagram. TDI is internally pulled up and
can be disconnected if the TAP is unused in an application. TDI is connected to the Most Significant Bit (MSB)
on any register.
The SRAM can operate without using the JTAG feature.
To disable the TAP controller, TCK must be tied LOW
(Vss) to prevent clocking of the device. TDI and TMS are
internally pulled up and may be disconnected. They may
alternately be connected to Vdd through a pull-up resistor.
TDO should be left disconnected. On power-up, the device
will start in a reset state which will not interfere with the
device operation.
Test Mode Select (TMS)
The TMS input is used to send commands to the TAP
controller and is sampled on the rising edge of TCK. This
pin may be left disconnected if the TAP is not used. The pin
is internally pulled up, resulting in a logic HIGH level.
Test Data-In (TDI)
tap controller block diagram
0
Bypass Register
2
1
0
Instruction Register
TDI
Selection Circuitry
31 30 29
. . .
Selection Circuitry
2
1
0
2
1
0
TDO
Identification Register
x
. . . . .
Boundary Scan Register*
TCK
TMS
TAP CONTROLLER
Integrated Silicon Solution, Inc. — www.issi.com — 1-800-379-4774 21
Rev. B3
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IS61LPS51218B, IS61LPS25636B, IS61LPS25632B, IS64LPS25636B,
IS61VPS/VVPS51218B, IS61VPS/VVPS25636B
Test Data Out (TDO)
Boundary Scan Register
The TDO output pin is used to serially clock data-out from
the registers. The output is active depending on the current
state of the TAP state machine (see TAP Controller State
Diagram). The output changes on the falling edge of TCK
and TDO is connected to the Least Significant Bit (LSB)
of any register.
The boundary scan register is connected to all input and
output pins on the SRAM. Several no connect (NC) pins are
also included in the scan register to reserve pins for higher
density devices. The x36 configuration has a 75-bit-long
register and the x18 configuration also has a 75-bit-long
register. The boundary scan register is loaded with the
contents of the RAM Input and Output ring when the TAP
controller is in the Capture-DR state and then placed between the TDI and TDO pins when the controller is moved
to the Shift-DR state. The EXTEST, SAMPLE/PRELOAD
and SAMPLE-Z instructions can be used to capture the
contents of the Input and Output ring.
The Boundary Scan Order tables show the order in which
the bits are connected. Each bit corresponds to one of the
bumps on the SRAM package. The MSB of the register is
connected to TDI, and the LSB is connected to TDO.
Performing a TAP Reset
A Reset is performed by forcing TMS HIGH (Vdd) for five
rising edges of TCK. RESET may be performed while the
SRAM is operating and does not affect its operation. At
power-up, the TAP is internally reset to ensure that TDO
comes up in a high-Z state.
TAP Registers
Registers are connected between the TDI and TDO pins
and allow data to be scanned into and out of the SRAM
test circuitry. Only one register can be selected at a time
through the instruction registers. Data is serially loaded
into the TDI pin on the rising edge of TCK and output on
the TDO pin on the falling edge of TCK.
Instruction Register
Three-bit instructions can be serially loaded into the instruction register. This register is loaded when it is placed
between the TDI and TDO pins. (See TAP Controller Block
Diagram) At power-up, the instruction register is loaded
with the IDCODE instruction. It is also loaded with the
IDCODE instruction if the controller is placed in a reset
state as previously described.
When the TAP controller is in the CaptureIR state, the two
least significant bits are loaded with a binary “01” pattern to
allow for fault isolation of the board level serial test path.
Bypass Register
To save time when serially shifting data through registers,
it is sometimes advantageous to skip certain states. The
bypass register is a single-bit register that can be placed
between TDI and TDO pins. This allows data to be shifted
through the SRAM with minimal delay. The bypass register is set LOW (Vss) when the BYPASS instruction is
executed.
Scan Register Sizes
Register
Name
Instruction
Bypass
ID
Boundary Scan
Bit Size
Bit Size
(x18) (x36)
3
3
1
1
32
32
90
90
Identification (ID) Register
The ID register is loaded with a vendor-specific, 32-bit
code during the Capture-DR state when the IDCODE command is loaded to the instruction register. The IDCODE
is hardwired into the SRAM and can be shifted out when
the TAP controller is in the Shift-DR state. The ID register
has vendor code and other information described in the
Identification Register Definitions table.
Identification Register Definitions
Instruction Field
Revision Number (31:28)
Device Depth (27:23)
Device Width (22:18)
ISSI Device ID (17:12)
ISSI JEDEC ID (11:1)
ID Register Presence (0)
22
Description
256K x 36
Reserved for version number.
xxxx
Defines depth of SRAM. 256K or 512K
00111
Defines width of the SRAM. x36 or x18
00100
Reserved for future use.
xxxxx
Allows unique identification of SRAM vendor.
00001010101
Indicate the presence of an ID register.
1
512K x 18
xxxx
01000
00011
xxxxx
00001010101
1
Integrated Silicon Solution, Inc. — www.issi.com — 1-800-379-4774
Rev. B3
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IS61LPS51218B, IS61LPS25636B, IS61LPS25632B, IS64LPS25636B,
IS61VPS/VVPS51218B, IS61VPS/VVPS25636B
TAP Instruction Set
SAMPLE/PRELOAD
Eight instructions are possible with the three-bit instruction
register and all combinations are listed in the Instruction
Code table. Three instructions are listed as RESERVED
and should not be used and the other five instructions are
described below. The TAP controller used in this SRAM
is not fully compliant with the 1149.1 convention because
some mandatory instructions are not fully implemented.
The TAP controller cannot be used to load address, data or
control signals and cannot preload the Input or Output buffers. The SRAM does not implement the 1149.1 commands
EXTEST or INTEST or the PRELOAD portion of SAMPLE/
PRELOAD; instead it performs a capture of the Inputs and
Output ring when these instructions are executed. Instructions are loaded into the TAP controller during the Shift-IR
state when the instruction register is placed between TDI
and TDO. During this state, instructions are shifted from
the instruction register through the TDI and TDO pins. To
execute an instruction once it is shifted in, the TAP controller must be moved into the Update-IR state.
SAMPLE/PRELOAD is a 1149.1 mandatory instruction.The
PRELOAD portion of this instruction is not implemented, so
the TAP controller is not fully 1149.1 compliant. When the
SAMPLE/PRELOAD instruction is loaded to the instruction register and the TAP controller is in the Capture-DR
state, a snapshot of data on the inputs and output pins is
captured in the boundary scan register.
It is important to realize that the TAP controller clock operates at a frequency up to 10 MHz, while the SRAM clock
runs more than an order of magnitude faster. Because of
the clock frequency differences, it is possible that during
the Capture-DR state, an input or output will under-go a
transition. The TAP may attempt a signal capture while in
transition (metastable state).The device will not be harmed,
but there is no guarantee of the value that will be captured
or repeatable results.
To guarantee that the boundary scan register will capture
the correct signal value, the SRAM signal must be stabilized
long enough to meet the TAP controller’s capture set-up
plus hold times (tcs and tch). To insure that the SRAM clock
input is captured correctly, designs need a way to stop (or
slow) the clock during a SAMPLE/PRELOAD instruction.
If this is not an issue, it is possible to capture all other
signals and simply ignore the value of the CLK captured
in the boundary scan register.
Once the data is captured, it is possible to shift out the data
by putting the TAP into the Shift-DR state. This places the
boundary scan register between the TDI and TDO pins.
Note that since the PRELOAD part of the command is not
implemented, putting the TAP into the Update to the UpdateDR state while performing a SAMPLE/PRELOAD instruction
will have the same effect as the Pause-DR command.
EXTEST
EXTEST is a mandatory 1149.1 instruction which is to be
executed whenever the instruction register is loaded with
all 0s. Because EXTEST is not implemented in the TAP
controller, this device is not 1149.1 standard compliant.
The TAP controller recognizes an all-0 instruction. When an
EXTEST instruction is loaded into the instruction register,
the SRAM responds as if a SAMPLE/PRELOAD instruction
has been loaded. There is a difference between the instructions, unlike the SAMPLE/PRELOAD instruction, EXTEST
places the SRAM outputs in a High-Z state.
IDCODE
The IDCODE instruction causes a vendor-specific, 32bit code to be loaded into the instruction register. It also
places the instruction register between the TDI and TDO
pins and allows the IDCODE to be shifted out of the device
when the TAP controller enters the Shift-DR state. The
IDCODE instruction is loaded into the instruction register
upon power-up or whenever the TAP controller is given a
test logic reset state.
Bypass
When the BYPASS instruction is loaded in the instruction register and the TAP is placed in a Shift-DR state,
the bypass register is placed between the TDI and TDO
pins. The advantage of the BYPASS instruction is that it
shortens the boundary scan path when multiple devices
are connected together on a board.
SAMPLE-Z
Reserved
The SAMPLE-Z instruction causes the boundary scan
register to be connected between the TDI and TDO pins
when the TAP controller is in a Shift-DR state. It also places
all SRAM outputs into a High-Z state.
These instructions are not implemented but are reserved
for future use. Do not use these instructions.
Integrated Silicon Solution, Inc. — www.issi.com — 1-800-379-4774 23
Rev. B3
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IS61LPS51218B, IS61LPS25636B, IS61LPS25632B, IS64LPS25636B,
IS61VPS/VVPS51218B, IS61VPS/VVPS25636B
Instruction Codes
Code Instruction Description
000
EXTEST
Captures the Input/Output ring contents. Places the boundary scan register between the TDI and TDO. Forces all SRAM outputs to High-Z state. This
instruction is not 1149.1 compliant.
001
IDCODE
Loads the ID register with the vendor ID code and places the register between TDI
and TDO. This operation does not affect SRAM operation.
010
SAMPLE-Z
Captures the Input/Output contents. Places the boundary scan register between
TDI and TDO. Forces all SRAM output drivers to a High-Z state.
011
RESERVED
Do Not Use: This instruction is reserved for future use.
100
SAMPLE/PRELOAD
Captures the Input/Output ring contents. Places the boundary scan register
between TDI and TDO. Does not affect the SRAM operation. This instruction does not
implement 1149.1 preload function and is therefore not 1149.1 compliant.
101
RESERVED
Do Not Use: This instruction is reserved for future use.
110
RESERVED
Do Not Use: This instruction is reserved for future use.
111
BYPASS
Places the bypass register between TDI and TDO. This operation does not
affect SRAM operation.
TAP CONTROLLER STATE DIAGRAM
Test Logic Reset
1
0
Run Test/Idle
1
Select DR
0
0
1
1
1
Capture DR
0
Shift DR
1
Exit1 DR
0
Select IR
0
1
Exit1 IR
0
Pause DR
0
1
0
1
24
Exit2 DR
1
Update DR
0
Capture IR
0
Shift IR
1
0
Pause IR
1
0
1
1
0
1
0
Exit2 IR
1
Update IR
0
Integrated Silicon Solution, Inc. — www.issi.com — 1-800-379-4774
Rev. B3
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IS61LPS51218B, IS61LPS25636B, IS61LPS25632B, IS64LPS25636B,
IS61VPS/VVPS51218B, IS61VPS/VVPS25636B
TAP Electrical Characteristics (2.5V and 3.3V Operating Range)
Symbol
Voh1
Voh2
Vol1
Vol2
Vih
Vil
Ix
Parameter
Output HIGH Voltage
Output HIGH Voltage
Output LOW Voltage
Output LOW Voltage
Input HIGH Voltage
Input LOW Voltage
Input Leakage Current
Test Conditions
Ioh = –2.0 mA
Ioh = –100 µA
Iol = 2.0 mA
Iol = 100 µA
Vss ≤ V I ≤ Vddq
TAP Electrical Characteristics (1.8V Operating Range)
Symbol
Voh1
Vol1
Vih
Vil
Ix
Min.
1.7
2.1
—
—
1.7
–0.3
–10
Max.
—
—
0.7
0.2
Vdd +0.3
0.7
10
Units
V
V
V
V
V
V
µA
Parameter
Output HIGH Voltage
Test Conditions
Ioh = –2.0 mA
Min.
Vdd -0.4
Max.
—
Units
V
Output LOW Voltage
Input HIGH Voltage
Input LOW Voltage
Input Leakage Current
Iol = 2.0 mA
Vss ≤ V I ≤ Vddq
-0.3
1.3
–0.3
–10
0.5
Vdd +0.3
0.7
10
V
V
V
µA
TAP AC ELECTRICAL CHARACTERISTICS (Over Operating Range)
Parameter
Symbol
Min
Max
Units
TCK cycle time
tTHTH
100
–
ns
TCK high pulse width
tTHTL
40
–
ns
TCK low pulse width
tTLTH
40
–
ns
TMS Setup
tMVTH
10
–
ns
TMS Hold
tTHMX
10
–
ns
TDI Setup
tDVTH
10
–
ns
TDI Hold
tTHDX
10
–
ns
TCK Low to Valid Data
tTLOV
–
20
ns
Integrated Silicon Solution, Inc. — www.issi.com — 1-800-379-4774 25
Rev. B3
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IS61LPS51218B, IS61LPS25636B, IS61LPS25632B, IS64LPS25636B,
IS61VPS/VVPS51218B, IS61VPS/VVPS25636B
TAP AC TEST CONDITIONS (1.8V/2.5V/3.3V)
Input pulse levels
Input rise and fall times
Input timing reference levels
Output reference levels
Test load termination supply voltage
Vtrig
0 to 1.8V/0 to 2.5V/0 to 3.0V
1.5ns
0.9V/1.25V/1.5V
0.9V/1.25V/1.5V
0.9V/1.25V/1.5V
0.9V/1.25V/1.5V
TAP Output Load Equivalent
50Ω
Vtrig
TDO
20 pF
Z0 = 50Ω
GND
Tap timing
1
2
tTHTH
3
4
5
6
tTLTH
TCK
tTHTL
tMVTH tTHMX
TMS
tDVTH tTHDX
TDI
tTLOV
TDO
tTLOX
DON'T CARE
UNDEFINED
26
Integrated Silicon Solution, Inc. — www.issi.com — 1-800-379-4774
Rev. B3
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IS61LPS51218B, IS61LPS25636B, IS61LPS25632B, IS64LPS25636B,
IS61VPS/VVPS51218B, IS61VPS/VVPS25636B
119 BGA Boundary Scan Order
TBD
Integrated Silicon Solution, Inc. — www.issi.com — 1-800-379-4774 27
Rev. B3
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IS61LPS51218B, IS61LPS25636B, IS61LPS25632B, IS64LPS25636B,
IS61VPS/VVPS51218B, IS61VPS/VVPS25636B
165 BGA Boundary Scan Order
165 BGA
165 BGA
x36
Bit #
28
Bump ID
x36
x18
Signal
Bump ID
Signal
Bit #
Bump ID
x18
Signal
Bump ID
Signal
1
N6
NC
N6
NC
41
B8
/OE
B8
/OE
2
N7
NC
N7
NC
42
A7
/BWE
A7
/BWE
3
N10
NC
N10
NC
43
B7
/GW
B7
/GW
4
P11
A8
P11
A8
44
B6
CLK
B6
CLK
5
P8
A17
P8
A17
45
A6
/CE2
A6
/CE2
6
R8
A16
R8
A16
46
B5
/Bwa
B5
/Bwa
7
R9
A15
R9
A15
47
A5
/Bwb
A5
NC
8
P9
A14
P9
A14
48
A4
/Bwc
A4
/Bwb
9
P10
A13
P10
A13
49
B4
/Bwd
B4
NC
B3
CE2
B3
CE2
10
R10
A12
R10
A12
50
11
R11
A11
R11
A11
51
A3
/CE1
A3
/CE1
12
H11
ZZ
H11
ZZ
52
A2
A7
A2
A7
13
N11
DQa0
N11
NC
53
B2
A6
B2
A6
14
M11
DQa1
M11
NC
54
C2
NC
C2
NC
15
L11
DQa2
L11
NC
55
B1
NC
B1
NC
16
M10
DQa3
M10
NC
56
A1
NC
A1
NC
17
L10
DQa4
L10
NC
57
C1
DQc0
C1
NC
18
K11
DQa5
K11
DQa8
58
D1
DQc1
D1
NC
E1
DQc2
E1
NC
NC
19
J11
DQa6
J11
DQa7
59
20
K10
DQa7
K10
DQa6
60
D2
DQc3
D2
21
J10
DQa8
J10
DQa5
61
E2
DQc4
E2
NC
22
H9
NC
H9
NC
62
F1
DQc5
F1
DQb8
23
H10
NC
H10
NC
63
G1
DQc6
G1
DQb7
24
G11
DQb8
G11
DQa4
64
F2
DQc7
F2
DQb6
25
F11
DQb7
F11
DQa3
65
G2
DQc8
G2
DQb5
26
G10
DQb6
G10
DQa2
66
H1
NC
H1
NC
27
E11
DQb5
E11
DQa1
67
H2
NC
H2
NC
28
D11
DQb4
D11
DQa0
68
H3
NC
H3
NC
29
F10
DQb3
C11
NC
69
J1
DQd8
J1
DQb4
K1
DQd7
K1
DQb3
J2
DQd6
J2
DQb2
30
E10
DQb2
E10
NC
70
31
D10
DQb1
D10
NC
71
32
C11
DQb0
F10
NC
72
L1
DQd5
L1
DQb1
33
A11
NC
A11
A18
73
M1
DQd4
M1
DQb0
34
B11
NC
B11
NC
74
K2
DQd3
N1
NC
35
A10
A10
A10
A10
75
L2
DQd2
L2
NC
36
B10
A9
B10
A9
76
M2
DQd1
M2
NC
37
A9
/ADV
A9
/ADV
77
N1
DQd0
K2
NC
38
B9
/ADSP
B9
/ADSP
78
N2
NC
N2
NC
P1
NC
P1
NC
R1
MODE
R1
MODE
39
C10
NC
C10
NC
79
40
A8
/ADSC
A8
/ADSC
80
Integrated Silicon Solution, Inc. — www.issi.com — 1-800-379-4774
Rev. B3
05/26/2017
IS61LPS51218B, IS61LPS25636B, IS61LPS25632B, IS64LPS25636B,
IS61VPS/VVPS51218B, IS61VPS/VVPS25636B
165 BGA
x36
x18
Bit #
Bump ID
Signal
Bump ID
Signal
81
R2
NC
R2
NC
82
P3
A5
P3
A5
83
R3
A4
R3
A4
84
P2
NC
P2
NC
85
P4
A2
P4
A2
86
R4
A3
R4
A3
87
N5
NC
N5
NC
88
P6
A1
P6
A1
89
R6
A0
R6
A0
90
*
Int
*
Int
Integrated Silicon Solution, Inc. — www.issi.com — 1-800-379-4774 29
Rev. B3
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IS61LPS51218B, IS61LPS25636B, IS61LPS25632B, IS64LPS25636B,
IS61VPS/VVPS51218B, IS61VPS/VVPS25636B
ORDERING INFORMATION (3.3V core/2.5V-3.3V I/O)
Industrial Range: -40°C to +85°C
Configuration
256Kx32
Frequency
Order Part Number
Package(1)
200
IS61LPS25632B-200TQLI
100 QFP, 3CE, Lead-free
250
200
166
IS61LPS25636B-250TQLI
IS61LPS25636B-250B2I
IS61LPS25636B-250B3I
IS61LPS25636B-200TQLI
IS61LPS25636B-200B2I
IS61LPS25636B-200B3I
IS61LPS25636B-200B3LI
IS61LPS25636B-166TQLI
100 QFP, 3CE, Lead-free
119 BGA
165 BGA
100 QFP, 3CE, Lead-free
119 BGA
165 BGA
165 BGA, Lead-free
100 QFP, 3CE, Lead-free
250
200
IS61LPS51218B-250TQLI
IS61LPS51218B-250TQ2LI
IS61LPS51218B-250B2I
IS61LPS51218B-250B3I
IS61LPS51218B-200TQLI
IS61LPS51218B-200TQ2LI
IS61LPS51218B-200B2I
IS61LPS51218B-200B3I
100 QFT, 3CE, Lead-free
100 QFT, 2CE, Lead-free
119 BGA
165 BGA
100 QFP, 3CE, Lead-free
100 QFP, 2CE, Lead-free
119 BGA
165 BGA
256Kx36
512Kx18
Note:
1. For 100 QFP, 2CE option contact SRAM Marketing at sram@issi.com
Automotive Range: -40°C to +125°C
Configuration
256Kx36
30
Frequency
200
166
Order Part Number
IS64LPS25636B-200TQLA3
IS64LPS25636B-166TQLA3
Package
100 QFP, 3CE, Lead-free
100 QFP, 3CE, Lead-free
Integrated Silicon Solution, Inc. — www.issi.com — 1-800-379-4774
Rev. B3
05/26/2017
IS61LPS51218B, IS61LPS25636B, IS61LPS25632B, IS64LPS25636B,
IS61VPS/VVPS51218B, IS61VPS/VVPS25636B
ORDERING INFORMATION (2.5V core/2.5V I/O)
Industrial Range: -40°C to +85°C
Configuration
256Kx36
Frequency
Order Part Number
Package(1)
250
200
IS61VPS25636B-250TQLI
IS61VPS25636B-250B2I
IS61VPS25636B-250B3I
IS61VPS25636B-200TQLI
IS61VPS25636B-200B2I
IS61VPS25636B-200B3I
100 QFP, 3CE, Lead-free
119 BGA
165 BGA
100 QFP, 3CE, Lead-free
119 BGA
165 BGA
250
200
IS61VPS51218B-250TQLI
IS61VPS51218B-250B2I
IS61VPS51218B-250B3I
IS61VPS51218B-200B2I
IS61VPS51218B-200B3I
100 QFP, 3CE, Lead-free
119 BGA
165 BGA
119 BGA
165 BGA
512Kx18
Note:
1. For 100 QFP, 2CE option contact SRAM Marketing at sram@issi.com
ORDERING INFORMATION (Vdd 1.8V/Vddq = 1.8V)
Please contact SRAM Marketing at sram@issi.com
Integrated Silicon Solution, Inc. — www.issi.com — 1-800-379-4774 31
Rev. B3
05/26/2017
IS61LPS51218B, IS61LPS25636B, IS61LPS25632B, IS64LPS25636B,
IS61VPS/VVPS51218B, IS61VPS/VVPS25636B
32
Integrated Silicon Solution, Inc. — www.issi.com — 1-800-379-4774
Rev. B3
05/26/2017
IS61LPS51218B, IS61LPS25636B, IS61LPS25632B, IS64LPS25636B,
IS61VPS/VVPS51218B, IS61VPS/VVPS25636B
Integrated Silicon Solution, Inc. — www.issi.com — 1-800-379-4774 33
Rev. B3
05/26/2017
34
Package Outline
1. CONTROLLING DIMENSION : MM .
NOTE :
08/28/2008
IS61LPS51218B, IS61LPS25636B, IS61LPS25632B, IS64LPS25636B,
IS61VPS/VVPS51218B, IS61VPS/VVPS25636B
Integrated Silicon Solution, Inc. — www.issi.com — 1-800-379-4774
Rev. B3
05/26/2017