®
LY62256
Rev. 2.9
32K X 8 BIT LOW POWER CMOS SRAM
GENERAL DESCRIPTION
The LY62256 is a 262,144-bit low power CMOS
static random access memory organized as 32,768
words by 8 bits. It is fabricated using very high
performance, high reliability CMOS technology. Its
standby current is stable within the range of
operating temperature.
The LY62256 is well designed for low power
application, and particularly well suited for battery
back-up nonvolatile memory application.
The LY62256 operates from a single power
supply of 2.7~5.5V and all inputs and outputs are
fully TTL compatible
FEATURES
Fast access time : 35/55/70ns
Low power consumption:
Operating current : 20/15/10mA (TYP.)
Standby current : 1μA (TYP.)
Single 2.7~5.5V power supply
All inputs and outputs TTL compatible
Fully static operation
Tri-state output
Data retention voltage : 1.5V (MIN.)
Green package available
Package : 28-pin 600 mil PDIP
28-pin 330 mil SOP
28-pin 8mm x 13.4mm STSOP
28-pin 300 mil Skinny P-DIP
PRODUCT FAMILY
Product
Family
LY62256
LY62256(E)
LY62256(I)
Operating
Temperature
0 ~ 70℃
-20 ~ 80℃
-40 ~ 85℃
Vcc Range
2.7 ~ 5.5V
2.7 ~ 5.5V
2.7 ~ 5.5V
Speed
35/55/70ns
35/55/70ns
35/55/70ns
Power Dissipation
Standby(I
SB1,
TYP.) Operating(Icc,TYP.)
1µA
20/15/10mA
1µA
20/15/10mA
1µA
20/15/10mA
FUNCTIONAL BLOCK DIAGRAM
PIN DESCRIPTION
SYMBOL
DESCRIPTION
Address Inputs
Data Inputs/Outputs
Chip Enable Input
Write Enable Input
Output Enable Input
Power Supply
Ground
Vcc
Vss
A0 - A14
DQ0 – DQ7
DECODER
32Kx8
MEMORY ARRAY
CE#
WE#
OE#
V
CC
V
SS
A0-A14
DQ0-DQ7
I/O DATA
CIRCUIT
COLUMN I/O
CE#
WE#
OE#
CONTROL
CIRCUIT
5F, No. 2, Industry E. Rd. IX, Science-Based Industrial Park, Hsinchu 300, Taiwan.
TEL: 886-3-6668838
FAX: 886-3-6668836
Lyontek Inc.
reserves the rights to change the specifications and products without notice.
1
LYONTEK [ Lyontek Inc. ]
