®
LY62256
32K X 8 BIT LOW POWER CMOS SRAM
Rev. 2.9
FEATURES
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.
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
The LY62256 is well designed for low power
application, and particularly well suited for battery
back-up nonvolatile memory application.
Tri-state output
Data retention voltage : 1.5V (MIN.)
Green package available
Package : 28-pin 600 mil PDIP
28-pin 330 mil SOP
The LY62256 operates from a single power
supply of 2.7~5.5V and all inputs and outputs are
fully TTL compatible
28-pin 8mm x 13.4mm STSOP
28-pin 300 mil Skinny P-DIP
PRODUCT FAMILY
Power Dissipation
Speed
Product
Family
LY62256
Operating
Temperature
0 ~ 70℃
Vcc Range
Standby(ISB1,TYP.) Operating(Icc,TYP.)
2.7 ~ 5.5V
2.7 ~ 5.5V
2.7 ~ 5.5V
35/55/70ns
35/55/70ns
35/55/70ns
1µA
1µA
1µA
20/15/10mA
20/15/10mA
20/15/10mA
-20 ~ 80℃
-40 ~ 85℃
LY62256(E)
LY62256(I)
FUNCTIONAL BLOCK DIAGRAM
PIN DESCRIPTION
SYMBOL
DESCRIPTION
Address Inputs
A0 - A14
Vcc
Vss
DQ0 – DQ7 Data Inputs/Outputs
CE#
WE#
OE#
VCC
Chip Enable Input
Write Enable Input
Output Enable Input
Power Supply
32Kx8
MEMORY ARRAY
A0-A14
DECODER
VSS
Ground
I/O DATA
CIRCUIT
DQ0-DQ7
COLUMN I/O
CE#
WE#
OE#
CONTROL
CIRCUIT
Lyontek Inc. reserves the rights to change the specifications and products without notice.
5F, No. 2, Industry E. Rd. IX, Science-Based Industrial Park, Hsinchu 300, Taiwan.
TEL: 886-3-6668838
FAX: 886-3-6668836
1
LYONTEK [ Lyontek Inc. ]
