®
LY622568
256K X 8 BIT LOW POWER CMOS SRAM
Rev. 2.4
FEATURES
GENERAL DESCRIPTION
Fast access time : 45/55/70ns
Low power consumption:
The LY622568 is a 2,097,152-bit low power CMOS
static random access memory organized as 262,144
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.
Operating current : 50/40/30mA (TYP.)
Standby current : 3μA@5V(TYP.) LL/SL version
2μA@3V(TYP.) SL version
Single 4.5V ~ 5.5V power supply
All inputs and outputs TTL compatible
Fully static operation
The LY622568 is well designed for very low power
system applications, and particularly well suited for
battery back-up nonvolatile memory application.
Tri-state output
Data retention voltage : 1.5V (MIN.)
Green package available
Package : 32-pin 8mm x 20mm TSOP-I
32-pin 8mm x 13.4mm STSOP
32-pin 450 mil SOP
The LY622568 operates from a single power
supply of 4.5V ~ 5.5V and all inputs and outputs are
fully TTL compatible
32-pin 600 mil P-DIP
PRODUCT FAMILY
Power Dissipation
Speed
Product
Family
Operating
Temperature
0 ~ 70℃
Vcc
Range
Standby(ISB1,TYP.)
Operating(Icc,TYP.)
50/40/30mA
50/40/30mA
50/40/30mA
50/40/30mA
50/40/30mA
50/40/30mA
LY622568(LL)
LY622568(LLE)
LY622568(LLI)
LY622568(SL)
LY622568(SLE)
LY622568(SLI)
4.5 ~ 5.5V 45/55/70ns
4.5 ~ 5.5V 45/55/70ns
4.5 ~ 5.5V 45/55/70ns
4.5 ~ 5.5V 45/55/70ns
4.5 ~ 5.5V 45/55/70ns
4.5 ~ 5.5V 45/55/70ns
-
-
-
3µA@5V
3µA@5V
3µA@5V
-20 ~ 80℃
-40 ~ 85℃
0 ~ 70℃
2µA@3V 3µA@5V
2µA@3V 3µA@5V
2µA@3V 3µA@5V
-20 ~ 80℃
-40 ~ 85℃
FUNCTIONAL BLOCK DIAGRAM
PIN DESCRIPTION
SYMBOL
DESCRIPTION
A0 - A17
Address Inputs
Vcc
Vss
DQ0 – DQ7 Data Inputs/Outputs
CE#, CE2
WE#
OE#
Chip Enable Inputs
Write Enable Input
Output Enable Input
Power Supply
256Kx8
MEMORY ARRAY
A0-A17
DECODER
VCC
VSS
Ground
NC
No Connection
I/O DATA
CIRCUIT
DQ0-DQ7
COLUMN I/O
CE#
CE2
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. ]
