IS61WV25616EDALL-20BLI-TR 数据手册
IS61WV25616EDALL
256Kx16 HIGH SPEED ASYNCHRONOUS
CMOS STATIC RAM with ECC
KEY FEATURES
High-speed access time: 20ns
Single power supply
– 1.65V-2.2V VDD
Low Standby Current:1.5mA (typical)
Fully static operation: no clock or refresh
required
Data control
Three state outputs
Industrial and Automotive temperature support
Lead-free available
Error Detection and Correction
FUNCTIONAL BLOCK DIAGRAM
Memory
Memory
Lower IO ECC Upper IO ECC
Array
Array
Array
Array
256Kx8 256Kx4 256Kx8 256Kx4
DECODER
A0 – A17
VDD
VSS
8
I/O0 – I/O7
I/O8 – I/O15
I/O
DATA
CIRCUIT
8
4
DESCRIPTION
The ISSI IS61WV25616EDALL are high-speed, low power,
4M bit static RAMs organized as 256K words by 16 bits. It
is fabricated using ISSI's high-performance CMOS
technology and implemented ECC function to improve
reliability.
When CS# is HIGH (deselected), the device assumes a
standby mode at which the power dissipation can be
reduced down with CMOS input levels.
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.
A data byte allows Upper Byte (UB#) and Lower Byte (LB#)
access.
The IS61WV25616EDALL are packaged in the JEDEC
standard 48-pin mini BGA (6mm x 8mm), and 44-pin TSOP
(TYPE II)
12
8
8
4
AUGUST 2020
ECC
ECC
12
COLUMN I/OColumn I/O
CS#
OE#
WE#
UB#
LB#
CONTROL
CIRCUIT
Copyright © 2020 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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Rev. A2
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1
IS61WV25616EDALL
PIN CONFIGURATIONS
48-Pin mini BGA(6mm x 8mm)
1
A
B
LB#
I/O8
C
D
E
F
I/O9
VSS
VDD
I/O14
2
OE#
UB#
I/O10
I/O11
I/O12
I/O13
3
A0
A3
A5
A17
NC
A14
4
A1
A4
A6
A7
A16
A15
44-Pin TSOP-II
5
6
A2
CS#
NC
I/O0
I/O1
I/O3
I/O2
VDD
I/O4
I/O5
VSS
I/O6
G
I/O15
NC
A12
A13
WE#
I/O7
H
NC
A8
A9
A10
A11
NC
A0
1
44
A17
A1
2
43
A16
A2
3
42
A15
A3
4
41
OE#
A4
5
40
UB#
CS#
6
39
LB#
I/O0
7
38
I/O15
I/O1
I/O2
8
9
37
36
I/O14
I/O13
I/O12
I/O3
10
35
VDD
11
34
VSS
VSS
12
33
VDD
I/O4
13
32
I/O11
I/O5
I/O6
14
31
I/O10
15
30
I/O9
I/O7
16
29
I/O8
WE#
17
28
NC
A5
18
27
A14
A6
A7
19
26
A13
20
25
A12
A8
21
24
A11
A9
22
23
A10
PIN DESCRIPTIONS
A0-A17
I/O0-I/O15
CS#
OE#
WE#
LB#
UB#
NC
VDD
VSS
Address Inputs
Data Inputs/Outputs
Chip Enable Input
Output Enable Input
Write Enable Input
Lower-byte Control (I/O0-I/O7)
Upper-byte Control (I/O8-I/O15)
No Connection
Power
Ground
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IS61WV25616EDALL
FUNCTION DESCRIPTION
SRAM is one of random access memories. Each byte or word has an address and can be accessed randomly. SRAM
has various modes supported. Each function is described below with Truth Table.
STANDBY MODE
Device enters standby mode when deselected (CS# HIGH). The input and output pins (I/O0-15) are placed in a high
impedance state. The current consumption in this mode will be ISB1, or ISB2.
WRITE MODE
Write operation issues with Chip Select (CS#) Low and Write Enable (WE#) Low. The input and output pins (I/O0-15)
are in data input mode. Output buffers are closed during this time even if OE# is Low. UB# and LB# enables a byte
write feature. By enabling LB# Low, data from I/O pins (I/O0 through I/O7) are written into the location specified on the
address pins. And with UB# being Low, data from I/O pins (I/O8 through I/O15) are written into the location.
READ MODE
Read operation issues with Chip Select (CS#) Low and Write Enable (WE#) 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. UB# and LB# enables a byte
read feature. By enabling LB# Low, data from memory appears on I/O0-7. And with UB# being Low, data from memory
appears on I/O8-15.
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
CS#
WE#
OE#
LB#
UB#
I/O0-I/O7
I/O8-I/O15
VDD Current
Not Selected
H
X
X
X
X
High-Z
High-Z
ISB1, ISB2
L
H
H
L
X
High-Z
High-Z
L
X
X
H
H
High-Z
High-Z
L
H
L
L
H
DOUT
High-Z
L
H
L
H
L
High-Z
DOUT
L
H
L
L
L
DOUT
DOUT
L
L
X
L
H
DIN
High-Z
L
L
X
H
L
High-Z
DIN
L
L
X
L
L
DIN
DIN
Output Disabled
Read
Write
ICC,ICC1
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ICC,ICC1
ICC,ICC1
3
IS61WV25616EDALL
ABSOLUTE MAXIMUM RATINGS(1)
Symbol
Vter m
VDD
tStg
Parameter
Terminal Voltage with Respect to VSS
V DD Related to VSS
Storage Temperature
Value
–0.5 to VDD + 0.5V
–0.3 to 4.0
–65 to +150
PT
Power Dissipation
1.0
Unit
V
V
C
W
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.
.
PIN CAPACITANCE (1)
Parameter
Input capacitance
DQ capacitance (IO0–IO15)
Symbol
CIN
CI/O
Test Condition
TA = 25°C, f = 1 MHz, VDD = VDD(typ)
Max
6
8
Units
pF
pF
Note:
1. These parameters are guaranteed by design and tested by a sample basis only.
OPERATING RANGE(1)
Range
Ambient
Temperature
Commercial
0C to +70C
Industrial
-40C to +85C
Note:
1.
PART NUMBER
IS61WV25616EDALL
SPEED (MAX)
VDD
20 ns
20 ns
1.65V – 2.2V
1.65V – 2.2V
Full device AC operation assumes a 100 µs ramp time from 0 to VDD(min) and 200 µs wait time after VDD stabilization.
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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IS61WV25616EDALL
AC TEST CONDITIONS (OVER THE OPERATING RANGE)
Parameter
Unit
(1.65V~2.2V)
0V to VDD
1.5 ns
0.9V
13500
10800
1.8V
Refer to Figure 1 and 2
Input Pulse Level
Input Rise and Fall Time
Output Timing Reference Level
R1 (ohm)
R2 (ohm)
VTM (V)
Output Load Conditions
OUTPUT LOAD CONDITIONS FIGURES
FIGURE 1
FIGURE 2
R1
VTM
TM
V
Zo = 50 ohm
Output
50 ohm
VDD/2
30 pF,
Including
jig
and scope
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Rev. A2
08/28/2020
OUTPUT
5pF,
Including
jig
and scope
R2R2
5
IS61WV25616EDALL
DC ELECTRICAL CHARACTERISTICS
IS61(64)WV25616EEBLL DC ELECTRICAL CHARACTERISTICS-I (OVER THE OPERATING RANGE)
VDD = 1.65V – 2.2V
Symbol
Parameter
Test Conditions
Min.
Max.
VOH
Output HIGH Voltage
IOH = -0.1 mA
1.4
—
VOL
Output LOW Voltage
IOL = 0.1 mA
—
0.2
VIH(1)
Input HIGH Voltage
1.4
VDD + 0.2
VIL(1)
Input LOW Voltage
–0.2
0.4
ILI
Input Leakage
GND < VIN < VDD
–1
1
ILO
Output Leakage
GND < VIN < VDD, Output Disabled
–1
1
Notes:
1.
2.
Unit
V
V
V
V
µA
µA
VILL(min) = -1.0V AC (pulse width < 20ns). Not 100% tested.
VIHH (max) = VDD + 1.0V AC (pulse width < 20ns). Not 100% tested.
POWER SUPPLY CHARACTERISTICS-II FOR POWER (OVER THE OPERATING RANGE)
Symbol
Parameter
ICC
VDD Dynamic Operating
Supply Current
ICC1
Operating Supply
Current
ISB1
TTL Standby Current
(TTL Inputs)
ISB2
CMOS Standby Current
(CMOS Inputs)
Test Conditions
VDD = MAX, IOU T = 0 mA, f = fMAX
VDD = MAX,
IOUT = 0 mA, f = 0
VDD = MAX,
VIN = VIH or VIL
CS# ≥ VIH , f = 0
VDD = MAX,
CS# ≥ VDD - 0.2V
VIN ≥ VDD - 0.2V , or VIN ≤ 0.2V , f
=0
Notes:
1.
2.
Grade
Com.
Ind.
Auto.
Com.
Ind.
Auto.
Com.
Ind.
Auto.
Com.
-20
Max
25
30
20
25
10
15
5
Ind.
6
Auto.
-
Typ. (2)
Unit
mA
mA
mA
mA
1.5
At f = fMAX, address and data inputs are cycling at the maximum frequency, f = 0 means no input line change.
Typical values are measured at VDD = 1.8V, TA = 25 °C and not 100% tested.
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Rev. A2
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IS61WV25616EDALL
AC CHARACTERISTICS (OVER OPERATING RANGE)
READ CYCLE AC CHARACTERISTICS
Parameter
Symbol
Read Cycle Time
Address Access Time
Output Hold Time
CS# Access Time
OE# Access Time
OE# to High-Z Output
OE# to Low-Z Output
CS# to High-Z Output
CS# to Low-Z Output
UB#, LB# Access Time
UB#, LB# to High-Z Output
UB#, LB# to Low-Z Output
tRC
tAA
tOHA
tACE
tDOE
tHZOE
tLZOE
tHZCE
tLZCE
tBA
tHZB
tLZB
Notes:
1.
2.
-20(1)
Min
20
2.5
0
0
0
3
0
0
Max
20
20
8
8
8
8
8
-
unit
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
notes
2
2
2
2
2
2
Test conditions assume signal transition times of 3 ns or less, timing reference levels of VDD/2, and output loading specified in Figure 1.
Tested with the load in Figure 2. Transition is measured ±500 mV from steady-state voltage. Not 100% tested.
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Rev. A2
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IS61WV25616EDALL
Timing Diagram
READ CYCLE NO. 1(1,2) (ADDRESS CONTROLLED , CS#, OE#, UB#, LB# = LOW, WE# = HIGH)
tRC
Address
tAA
tOHA
tOHA
DQ 0-15
Note:
1.
PREVIOUS DATA VALID
DATA VALID
The device is continuously selected.
READ CYCLE NO. 2(1) (OE# CONTROLLED)
tRC
ADDRESS
tOHA
tAA
tDOE
OE#
tLZOE
tHZOE
CS#
tACS
tHZCS
tLZCS
UB#,LB#
tBA
tLZB
DOUT
HIGH-Z
LOW-Z
tHZB
DATA VALID
Notes:
1. Address is valid prior to or coincident with CS# LOW transition.
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Rev. A2
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IS61WV25616EDALL
WRITE CYCLE AC CHARACTERISTICS
Parameter
Symbol
Write Cycle Time
tWC
tSCS
tAW
tPWB
tHA
tSA
tPWE1
tPWE2
tSD
tHD
tHZWE
tLZWE
CS# to Write End
Address Setup Time to Write End
UB#,LB# to Write End
Address Hold from Write End
Address Setup Time
WE# Pulse Width
WE# Pulse Width (OE# = LOW)
Data Setup to Write End
Data Hold from Write End
WE# LOW to High-Z Output
WE# HIGH to Low-Z Output
Notes:
1
2
3
4
-20(1)
Min
20
12
12
12
0
0
12
17
9
0
3
Max
9
-
unit
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
notes
2
Test conditions assume signal transition times of 3 ns or less, timing reference levels of VDD/2, and output loading specified in Figure 1.
Tested with the load in Figure 2. Transition is measured ±500 mV from steady-state voltage. Not 100% tested.
The internal write time is defined by the overlap of CS# = LOW, UB# or LB# = LOW, and WE# = LOW. All signals must be in valid states to
initiate a Write, but anyone 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.
If OE# is LOW during write cycle, (WE# controlled, CS# = UB# = LB# = LOW), the minimum Write cycle time for write cycle NO.3 is the
sum of tHZWE and tSD
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IS61WV25616EDALL
Timing Diagram
WRITE CYCLE NO. 1(1) (WE# CONTROLLED, OE# = HIGH OR LOW)
tWC
ADDRESS
tSA
tSCS
tHA
CS#
WE#
tAW
tPWE1
tPWE2
UB#,LB#
tPBW
tHZWE
tLZWE
HIGH-Z
DATA UNDEFINED
DOUT
tHD
tSD
DATA IN VALID
DIN
Notes:
1.
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.
WRITE CYCLE NO. 2 (WE# CONTROLLED)
tWC
ADDRESS
OE#
tSCS
tHA
CS#
tAW
tPWE1
WE#
tSA
tPWB
UB#,LB#
tHZWE
DOUT
tLZWE
HIGHZ
DATA UNDEFINED
tSD
DIN
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Rev. A2
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tHD
DATA IN VALID
10
IS61WV25616EDALL
WRITE CYCLE NO. 3 (WE# CONTROLLED, OE#, CS#, UB #, LB# = LOW)
ADDRESS
OE# = LOW
tPWE2
WE#
tHZWE
DOUT
HIGH-Z
DATA UNDEFINED
DATA IN VALID
DIN
WRITE CYCLE NO. 4 (UB# & LB# Controlled)
tWC
ADDRESS
tWC
ADDRESS 1
ADDRESS 2
CS#=LOW
OE#=LOW
tSA
tHA
WE#
tHA
tSA
tPWB
UB#, LB#
tPWB
WORD 1
WORD 2
tHZWE
DOUT
tLZWE
HIGH-Z
DATA UNDEFINED
tHD
tSD
DIN
DATA IN
VALID
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DATA IN
VALID
11
IS61WV25616EDALL
DATA RETENTION CHARACTERISTICS
Symbol
Parameter
Test Condition
VDR
VDD for Data
Retention
See Data Retention Waveform
Data Retention
Current
VDD = MAX,
CS# ≥ VDD – 0.2V,
VIN ≥ VDD - 0.2V, or VIN ≤ 0.2V
See Data Retention Waveform
IDR
tSDR
Data Retention
Setup Time
tRDR
Recovery Time
Min.
Typ.(2)
Max.
Unit
1.2
-
-
V
Com.
-
0.5
5
mA
Ind.
-
-
6
0
-
-
tRC
-
-
OPTION
See Data Retention Waveform
ns
ns
Notes:
1. If CS# >VDD–0.2V, all other inputs including UB# and LB# must meet this condition.
2. Typical values are measured at VDD= 1.8V, TA = 25℃ and not 100% tested.
DATA RETENTION WAVEFORM (CS# CONTROLLED)
tSDR
Data Retention Mode
tRDR
VDD
VDR
CS# > VDD – 0.2V
CS#
GND
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IS61WV25616EDALL
ORDERING INFORMATION
Industrial Range: –40°C to +85°C
Speed (ns)
20
20
Order Part No.
Package
IS61WV25616EDALL-20BLI
IS61WV25616EDALL-20TLI
mini BGA (6mm x 8mm), Lead-free
TSOP (Type II), Lead-free
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IS61WV25616EDALL
PACKAGE INFORMATION
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IS61WV25616EDALL
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