IS62WV2568EBLL-45TLI-TR 数据手册
IS62WV2568EALL
IS62/65WV2568EBLL
MARCH 2018
256Kx8 LOW VOLTAGE,
ULTRA LOW POWER CMOS STATIC RAM
KEY FEATURES
DESCRIPTION
High-speed access time: 45ns, 55ns
CMOS low power operation
– Operating Current: 18 mA (max) at 85°C
– CMOS Standby Current: 5.4uA (typ) at 25°C
TTL compatible interface levels
Single power supply
The ISSI IS62/65WV2568EALL/EBLL are high-speed,
2M bit static RAMs organized as 256K words by 8 bits.
It is fabricated using ISSI's high-performance CMOS
technology. This highly reliable process coupled with
innovative circuit design techniques, yields highperformance and low power consumption devices.
When CS1# is HIGH (deselected) or when CS2 is LOW
(deselected), the device assumes a standby mode at
which the power dissipation can be reduced down with
CMOS input levels.
–1.65V-2.2V VDD (IS62WV2568EALL)
– 2.2V-3.6V VDD (IS62/65WV2568EBLL)
Three state outputs
Industrial and Automotive temperature support
Lead-free available
Easy memory expansion is provided by using Chip
Enable and Output Enable inputs. The active LOW Write
Enable (WE#) controls both writing and reading of the
memory.
The IS62/65WV2568EALL/EBLL are packaged in the
JEDEC standard 32-pin TSOP (TYPE I), sTSOP
(TYPE I), and 36-pin mini BGA..
FUNCTIONAL BLOCK DIAGRAM
DECODER
A0 – A17
256K x 8
MEMORY
ARRAY
VDD
GND
I/O0 – I/O7
CS2
CS1#
OE#
WE#
I/O
DATA
CIRCUIT
COLUMN I/O
CONTROL
CIRCUIT
Copyright © 2018 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
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IS62/65WV2568EBLL
PIN CONFIGURATIONS
36-Pin mini BGA (6mm x 8mm)
1
A
B
A0
I/O4
C
I/O5
D
GND
E
2
A1
A2
3
CS2
WE#
NC
4
A3
A4
32-Pin TSOP (Type I), STSOP (Type I)
5
A6
A7
A5
I/O6
G
I/O7
H
A9
A8
I/O0
I/O1
VDD
VDD
F
6
GND
NC
A17
OE#
CS1#
A16
A15
I/O3
A10
A11
A12
A13
A14
I/O2
A11
1
32
OE#
A9
2
A8
3
31
30
CS1#
I/O7
A10
A13
4
29
WE#
5
28
I/O6
CS2
6
27
I/O5
A15
7
26
I/O4
VDD
A17
8
9
25
24
I/O3
GND
A16
10
23
I/O2
A14
11
22
I/O1
A12
12
21
A7
13
20
I/O0
A0
A6
A5
14
19
14
A4
16
18
17
A1
A2
A3
PIN DESCRIPTIONS
A0-A17
I/O0-I/O7
CS1#, CS2
OE#
WE#
NC
Address Inputs
Data Inputs/Outputs
Chip Enable Input
Output Enable Input
Write Enable Input
No Connection
VDD
GND
Power
Ground
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FUNCTION DESCRIPTION
SRAM is one of random access memories. SRAM has three different modes supported. Each function is described
below with Truth Table.
STANDBY MODE
Device enters standby mode when deselected (CS1# HIGH or CS2 LOW). The input and output pins (I/O0-7) are
placed in a high impedance state. CMOS input in this mode will maximize saving power.
WRITE MODE
Write operation issues with Chip selected (CS1# LOW and CS2 HIGH) and Write Enable (WE#) input LOW. The input
and output pins(I/O0-7) are in data input mode. Output buffers are closed during this time even if OE# is LOW.
READ MODE
Read operation issues with Chip selected (CS1# LOW and CS2 HIGH) and Write Enable (WE#) input HIGH. When
OE# is LOW, output buffer turns on to make data output. Any input to I/O pins during READ mode is not permitted.
In the READ mode, output buffers can be turned off by pulling OE# HIGH. In this mode, internal device operates as
READ but I/Os are in a high impedance state. Since device is in READ mode, active current is used.
TRUTH TABLE
Mode
Not Selected
Output Disabled
Write
Read
CS1#
CS2
WE#
OE#
I/O0-I/O7
H
X
L
L
L
X
L
H
H
H
X
X
H
H
L
X
X
H
L
X
High-Z
High-Z
High-Z
DIN
DOUT
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VDD Current
ISB2
ICC
ICC
ICC
3
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IS62/65WV2568EBLL
ABSOLUTE MAXIMUM RATINGS AND OPERATING RANGE
ABSOLUTE MAXIMUM RATINGS (1)
Symbol
Vt erm
tBIAS
Parameter
Terminal Voltage with Respect to GND
Temperature Under Bias
Value
–0.2 to +3.9(VDD+0.3V)
–55 to +125
VDD
V DD Related to GND
–0.2 to +3.9(VDD+0.3V)
Storage Temperature
–65 to +150
DC Output Current (LOW)
20
tStg
IOUT
(2)
Unit
V
C
V
C
mA
Notes:
1.
2.
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.
This condition is not per pin. Total current of all pins must meet this value.
OPERATING RANGE (1)
Range
Device Marking
Ambient Temperature
VDD
Commercial
IS62WV2568EALL
0C to +70C
1.65V-2.2V
Industrial
IS62WV2568EALL
-40C to +85C
1.65V-2.2V
Commercial
IS62WV2568EBLL
0C to +70C
2.2V-3.6V
Industrial
IS62WV2568EBLL
-40C to +85C
2.2V-3.6V
Automotive
IS65WV2568EBLL
-40C to +125C
2.2V-3.6V
Note:
1.
Full device AC operation assumes a 100 µs ramp time from 0 to Vcc(min) and 200 µs wait time after Vcc stabilization.
PIN CAPACITANCE (1)
Parameter
Symbol
Input capacitance
DQ capacitance (IO0–IO7)
CIN
CI/O
Test Condition
TA = 25°C, f = 1 MHz, VDD = VDD(typ)
Max
Units
10
10
pF
pF
Note:
1. These parameters are guaranteed by design and tested by a sample basis only.
THERMAL CHARACTERISTICS (1)
Parameter
Thermal resistance from junction to ambient (airflow = 1m/s)
Thermal resistance from junction to pins
Thermal resistance from junction to case
Symbol
RθJA
RθJB
RθJC
Rating
TBD
TBD
TBD
Units
°C/W
°C/W
°C/W
Note:
1. These parameters are guaranteed by design and tested by a sample basis only.
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AC TEST CONDITIONS (OVER THE OPERATING RANGE)
Parameter
Unit
(1.65V~2.2V)
0V to VDD
Input Pulse Level
Unit
(2.2V~3.6V)
0V to VDD
Input Rise and Fall Time
1V/ns
1V/ns
Output Timing Reference Level
0.9V
½ VDD
R1
13500
1005
R2
10800
820
VTM
1.8V
VDD
Output Load Conditions
Refer to Figure 1 and 2
OUTPUT LOAD CONDITIONS FIGURES
FIGURE 1
FIGURE 2
R1
R1
VTM
VTM
OUTPUT
OUTPUT
30pF,
Including
jig
and scope
R2
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5pF,
Including
jig
and scope
R2
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ELECTRICAL CHARACTERISTICS
IS62WV2568EALL DC ELECTRICAL CHARACTERISTICS-I (OVER THE OPERATING RANGE)
VDD = 1.65V ~ 2.2V
Symbol
VOH
VOL
VIH(1)
VIL(1)
ILI
ILO
Parameter
Output HIGH Voltage
Output LOW Voltage
Input HIGH Voltage
Input LOW Voltage
Input Leakage
Output Leakage
Test Conditions
I OH = -0.1 mA
IOL = 0.1 mA
GND < VIN < VDD
GND < VIN < VDD, Output Disabled
Min.
1.4
—
1.4
–0.2
–1
–1
Max.
—
0.2
VDD + 0.2
0.4
1
1
Unit
V
V
V
V
µA
µA
Note:
1. VILL(min) = -1.0V AC (pulse width < 10ns). Not 100% tested.
VIHH (max) = VDD + 1.0V AC (pulse width < 10ns). Not 100% tested.
IS62(5)WV2568EBLL DC ELECTRICAL CHARACTERISTICS-I (OVER THE OPERATING RANGE)
VDD = 2.2V ~ 3.6V
Symbol
VOH
Parameter
Output HIGH Voltage
VOL
Output LOW Voltage
VIH(1)
Input HIGH Voltage
VIL(1)
Input LOW Voltage
ILI
ILO
Notes:
1.
Input Leakage
Output Leakage
Test Conditions
2.2 ≤ V DD < 2.7, I OH = -0.1 mA
2.7 ≤ V DD ≤ 3.6, I OH = -1.0 mA
2.2 ≤ V DD < 2.7, IOL = 0.1 mA
2.7 ≤ V DD ≤ 3.6, IOL = 2.1 mA
2.2 ≤ V DD < 2.7
2.7 ≤ V DD ≤ 3.6
2.2 ≤ V DD < 2.7
2.7 ≤ V DD ≤ 3.6
GND < VIN < VDD
GND < VIN < VDD, Output Disabled
Min.
2.0
2.4
—
—
1.8
2.2
–0.3
–0.3
–1
–1
Max.
—
—
0.4
0.4
VDD + 0.3
VDD + 0.3
0.6
0.8
1
1
Unit
V
V
V
V
V
V
V
V
µA
µA
VILL(min) = -2.0V AC (pulse width < 10ns). Not 100% tested.
VIHH (max) = VDD + 2.0V AC (pulse width < 10ns). Not 100% tested.
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IS62WV2568EALL DC ELECTRICAL CHARACTERISTICS-II FOR POWER
(OVER THE OPERATING RANGE)
Symbol
Parameter
ICC
VDD Dynamic Operating
Supply Current
VDD=VDD(max), IOUT=0mA, f = fmax
CS1# = VIL, CS2 = VIH
VDD Static Operating
Supply Current
VDD=VDD(max), IOUT = 0mA, f=0
CS1# = VIL, CS2 = VIH
ICC1
CMOS Standby Current
(CMOS Inputs)
ISB2
Test Conditions
VDD = VDD(max), f = 0,
CS1# ≥ VDD - 0.2V or
0V ≤ CS2 ≤ 0.2V or
VIN ≤ 0.2V or VIN ≥ VDD - 0.2V
Grade
Com.
10
15
Ind.
-
18
Com.
1
3
Ind.
-
3
25°C
5.4
10
45°C
5.6
11
70°C
7.0
13
85°C
7.6
16
Unit
mA
mA
Com.
µA
Ind.
Note:
1.
55ns
Typ (1) Max
Typical values are measured at VDD = 1.8V, and not 100% tested.
IS62(65)WV2568EBLL DC ELECTRICAL CHARACTERISTICS-II FOR POWER
(OVER THE OPERATING RANGE)
Symbol
ICC
ICC1
Parameter
VDD Dynamic Operating
Supply Current
VDD Static Operating
Supply Current
Test Conditions
Grade
Com.
10
15
Ind.
-
18
Auto.
-
25
Com.
1
3
Ind.
-
3
Auto.
-
4
25°C
5.4
10
45°C
5.6
11
70°C
7.0
13
Ind.
85°C
7.6
16
Auto.
125°C
12.6
32
VDD=VDD(max), IOUT=0mA, f = fmax
CS1# = VIL, CS2 = VIH
VDD=VDD(max), IOUT = 0mA, f=0
CS1# = VIL, CS2 = VIH
Com.
ISB2
Note:
1.
CMOS Standby Current
(CMOS Inputs)
VDD = VDD(max), f = 0,
CS1# ≥ VDD - 0.2V or
0V ≤ CS2 ≤ 0.2V or
VIN ≤ 0.2V or VIN ≥ VDD - 0.2V
45/55ns
Typ (1) Max
Unit
mA
mA
µA
Typical values are included for reference only and are not guaranteed or tested. Typical values are measured at VDD = 3.0V
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AC CHARACTERISTICS
(6)
(OVER OPERATING RANGE)
READ CYCLE AC CHARACTERISTICS
Parameter
Symbol
Read Cycle Time
Address Access Time
Output Hold Time
CS1#, CS2 Access Time
OE# Access Time
OE# to High-Z Output
OE# to Low-Z Output
CS1#, CS2 to High-Z Output
CS1#, CS2 to Low-Z Output
45ns
55ns
unit
notes
55
55
ns
ns
ns
ns
1,5
1
1
1
25
18
18
-
ns
ns
ns
ns
ns
1
2
2
2
2
unit
notes
Min
Max
Min
Max
tRC
tAA
tOHA
tACS1/ACS2
45
8
-
45
45
55
8
-
tDOE
tHZOE
tLZOE
tHZCS1/HZCS2
tLZCS/LZCS2
5
10
22
18
18
-
5
10
WRITE CYCLE AC CHARACTERISTICS
Parameter
Symbol
Write Cycle Time
CS1#, CS2 to Write End
Address Setup Time to Write End
45ns
55ns
Min
Max
Min
Max
tWC
tSCS1/tSCS2
tAW
45
35
35
-
55
40
40
-
ns
ns
ns
1,3,5
1,3
1,3
Address Hold from Write End
Address Setup Time
WE# Pulse Width
Data Setup to Write End
Data Hold from Write End
WE# LOW to High-Z Output
tHA
tSA
tPWE
tSD
tHD
tHZWE
0
0
35
28
0
-
18
0
0
40
28
0
-
18
ns
ns
ns
ns
ns
ns
1,3
1,3
1,3,4
1,3
1,3
2,3
WE# HIGH to Low-Z Output
tLZWE
10
-
10
-
ns
2,3
Notes:
1
2.
3.
4.
5.
6.
Tested with the load in Figure 1.
Tested with the load in Figure 2. Transition is measured ±500 mV from steady-state voltage. tHZOE, tHZCS, tHZB, and tHZWE transitions
are measured when the output enters a high impedance state. Not 100% tested.
The internal write time is defined by the overlap of CS1# = LOW, CS2=HIGH, and WE# = LOW. All four conditions must be in valid states
to initiate a Write, but any condition can go inactive to terminate the Write. The Data Input Setup and Hold timing are referenced to the
rising or falling edge of the signal that terminates the write.
tPWE > tHZWE + tSD when OE# is LOW.
Address inputs must meet VIH and VIL SPEC during this period. Any glitch or unknown inputs are not permitted. Unknown input with
standby mode is acceptable.
Data retention characteristics are defined later in DATA RETENTION CHARACTERISTICS.
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TIMING DIAGRAM
READ CYCLE NO. 1(1) (ADDRESS CONTROLLED) (CS1# = OE# = LOW, CS2 = WE# = HIGH)
tRC
Address
tAA
tOHA
tOHA
DOUT
Note:
1.
PREVIOUS DATA VALID
LOW-Z
DATA VALID
The device is continuously selected.
READ CYCLE NO. 2(1) (OE# CONTROLLED)
tRC
ADDRESS
tAA
tDOE
OE#
tOHA
tHZOE
tLZOE
CS1#
tHZCS1/
tHZCS2
tACS1/tACS2
CS2
tLZCS1/
tLZCS2
DOUT
HIGH-Z
LOW-Z
DATA VALID
Note:
1.
Address is valid prior to or coincident with CS1# LOW and CS2 HIGH transition.
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WRITE CYCLE 1 (1, 2) (CS1#, CS2 Controlled, OE# = HIGH or LOW)
tWC
ADDRESS
tSCS1
tSA
CS1#
tHA
tSCS2
CS2
tAW
tPWE
WE#
tHZWE
DATA UNDEFINED
DOUT
HIGH-Z
(1)
tSD
DATA UNDEFINED
DIN
(2)
tLZWE
tHD
DATA IN VALID
Notes:
1
2.
tHZWE is based on the assumption when tSA=0nS after READ operation. Actual DOUT for tHZWE may not appear if OE# goes high
before Write Cycle. tHZOE is the time DOUT goes to High-Z after OE# goes high
During this period, the I/Os are in output state. Do not apply input signals.
WRITE CYCLE NO. 2 (1, 2) (WE# Controlled: OE# is HIGH During Write Cycle)
tWC
ADDRESS
tSCS1
CS1#
tSCS2
CS2
WE#
tHA
tAW
tPWE
tSA
tHZWE
DOUT
DATA UNDEFINED
(1)
HIGH-Z
tSD
DIN
Notes:
1.
2.
DATA UNDEFINED
(2)
tLZWE
tHD
DATA IN VALID
tHZOE is the time DOUT goes to High-Z after OE# goes high.
During this period, the I/Os are in output state. Do not apply input signals.
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WRITE CYCLE NO. 3(1) (WE# CONTROLLED: OE# IS LOW DURING WRITE CYCLE)
tWC
ADDRESS
tSCS1
tHA
CS1#
tSCS2
CS2
tAW
WE#
tPWE
tSA
tHZWE
DOUT
DATA UNDEFINED
(1)
HIGH-Z
tSD
DIN
Note:
1.
DATA UNDEFINED
(2)
tLZWE
tHD
DATA IN VALID
If OE# is low during write cycle, tHZWE must be met in the application. Do not apply input signal during this period. Data output from the
previous READ operation will drive IO BUS.
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DATA RETENTION CHARACTERISTICS
Symbol
VDR
IDR
Parameter
VDD for Data
Retention
Data Retention
Current
tSDR
Data Retention
Setup Time
tRDR
Recovery Time
Notes:
1.
2.
Test Condition
See Data Retention Waveform
VDD= VDR(min),
CS1# ≥ VDD – 0.2V(1), or
0V ≤ CS2 ≤ 0.2V, or
VIN ≤ 0.2V or VIN ≥ VDD - 0.2V
See Data Retention Waveform
OPTION
Typ.(2)
Max.
Unit
1.5
-
V
Com.
-
5
uA
Ind.
-
2
12
Auto
0
-
25
-
ns
tRC
-
-
ns
See Data Retention Waveform
Min.
If CS1# >VDD–0.2V, all other inputs including CS2 must meet this condition.
Typical values are measured at VDD= VDR (min), TA = 25℃ and not 100% tested.
DATA RETENTION WAVEFORM (CS1# CONTROLLED)
tSDR
Data Retention Mode
tRDR
VDD
VDR
CS1# > VDD – 0.2V
CS1#
GND
DATA RETENTION WAVEFORM (CS2 CONTROLLED)
tSDR
Data Retention Mode
tRDR
VDD
CS2
VDR
CS2 < 0.2V
GND
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ORDERING INFORMATION
IS62WV2568EALL (1.65V - 2.2V)
Industrial Range: –40°C to +85°C
Speed (ns)
Order Part No.
Package
55
IS62WV2568EALL-55TLI
TSOP (Type I, 8x20mm), Lead-free
55
IS62WV2568EALL-55BI
mini BGA (6mm x 8mm)
55
IS62WV2568EALL-55BLI
mini BGA (6mm x 8mm), Lead-free
55
IS62WV2568EALL-55HLI
sTSOP (Type I, 8x13.4mm), Lead-free
IS62WV2568EBLL (2.2V - 3.6V)
Industrial Range: –40°C to +85°C
Speed (ns)
Order Part No.
Package
45
IS62WV2568EBLL-45TLI
TSOP (Type I, 8x20mm), Lead-free
45
IS62WV2568EBLL-45BI
mini BGA (6mm x 8mm)
45
IS62WV2568EBLL-45BLI
mini BGA (6mm x 8mm), Lead-free
45
IS62WV2568EBLL-45HLI
sTSOP (Type I, 8x13.4mm), Lead-free
IS65WV2568EBLL (2.2V - 3.6V)
Automotive Range (A3): –40°C to +125°C
Speed (ns)
55
Order Part No.
Package
IS65WV2568EBLL-55CTLA3
TSOP (Type I, 8x20mm), Lead-free, Copper Leadframe
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PACKAGE INFORMATION
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