IS61/64WV2568FALL
IS61/64WV2568FBLL
Integrated Silicon Solution, Inc.- www.issi.com 1
Rev. A
04/27/2018
256Kx8 HIGH SPEED AYNCHRONOUS
CMOS STATIC RAM
KEY FEATURES
High-speed access time: 8, 10ns, 12ns
Low Active Current: 35mA (Max., 10ns, I-temp)
Low Standby Current: 10 mA (Max., I-temp)
Single power supply
– 1.65V-2.2V VDD(IS61/64WV2568FALL)
– 2.4V-3.6V VDD (IS61/64WV2568FBLL)
Three state outputs
Industrial and Automotive temperature support
Lead-free available
FUNCTIONAL BLOCK DIAGRAM
COLUMN I/O
CS#
WE#
OE#
CONTROL
CIRCUIT
I/O
DATA
CIRCUIT
256K x 8
MEMORY
ARRAY
DECODER
VDD
GND
A0 – A17
I/O0 – I/O7
DESCRIPTION
The
ISSI
IS61/64WV2568FALL/FBLL are high-speed, low
power, 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 high-performance and low power
devices.
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.
The IS61/64WV2568FALL/FBLL are packaged in the JEDEC
standard 44-pin TSOP (TYPE II), 36-pin SOJ and 36-ball
mini BGA (6mm x 8mm).
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
APRIL 2018
IS61/64WV2568FALL
IS61/64WV2568FBLL
Integrated Silicon Solution, Inc.- www.issi.com 2
Rev. A
04/27/2018
PIN CONFIGURATIONS
36-Pin SOJ (Package Code: K) 44-Pin TSOP-II
(Package Code: T)
A0
A1
A2
A3
A4
CS#
I/O0
I/O1
VDD
VSS
I/O2
I/O3
WE#
A5
A6
A7
NC
A16
A15
A14
OE#
I/O7
I/O6
VDD
VSS
I/O5
I/O4
A12
A11
A10
NC
1
2
3
4
5
6
7
8
9
10
12
11
13
14
15
16
24
23
22
21
20
19
18
17
34
33
32
31
30
29
28
27
26
25
36
35
A8
A9
NC
A17
A13
NC
NC
A0
A1
A2
A3
A4
CS#
I/O0
I/O1
VDD
VSS
I/O2
I/O3
WE#
A5
A6
A7
A8
A9
NC
NC
NC
NC
NC
A17
A16
A15
OE#
I/O7
I/O6
VDD
VSS
I/O5
I/O4
A13
A12
A11
A10
NC
NC
NC
1
2
3
4
5
6
7
8
9
10
12
11
13
14
15
16
32
31
30
29
28
27
26
25
24
23
21
22
20
19
18
17
42
41
40
39
38
37
36
35
34
33
44
43
NC
A14