®
LY61256
Rev. 1.7
32K X 8 BIT HIGH SPEED CMOS SRAM
GENERAL DESCRIPTION
The LY61256 is a 262,144-bit high speed 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 LY61256 is well designed for high speed
system application. Easy expansion is provided by
using an active LOW Chip Enable(CE#). The active
LOW Write Enable(WE#) controls both writing and
reading of the memory.
The LY61256 operates from a single power
supply of 5V and all inputs and outputs are fully TTL
compatible
FEATURES
Fast access time : 8/10/12/15ns
Low power consumption:
Operating current : 110/100/90/80mA (TYP.)
Standby current : 1mA (TYP.)
2μA (TYP.) LL-version
Single 5V power supply
All inputs and outputs TTL compatible
Fully static operation
Tri-state output
Data retention voltage : 2.0V (MIN.)
Green package available
Package : 28-pin 300 mil SOJ
28-pin 300 mil Skinny P-DIP
28-pin 8mm x 13.4mm STSOP
PRODUCT FAMILY
Product
Family
LY61256
LY61256(E)
LY61256(I)
LY61256(LL)
LY61256(LLE)
LY61256(LLI)
Operating
Temperature
0 ~ 70℃
-20 ~ 80℃
-40 ~ 85℃
0 ~ 70℃
-20 ~ 80℃
-40 ~ 85℃
Vcc Range
4.5 ~ 5.5V
4.5 ~ 5.5V
4.5 ~ 5.5V
4.5 ~ 5.5V
4.5 ~ 5.5V
4.5 ~ 5.5V
Speed
8/10/12/15ns
8/10/12/15ns
8/10/12/15ns
8/10/12/15ns
8/10/12/15ns
8/10/12/15ns
Power Dissipation
Standby(I
SB1,
TYP.) Operating(Icc,TYP.)
1mA
110/100/90/80mA
1mA
110/100/90/80mA
1mA
110/100/90/80mA
110/100/90/80mA
2μA(LL)
110/100/90/80mA
2μA(LL)
110/100/90/80mA
2μA(LL)
FUNCTIONAL BLOCK DIAGRAM
Vcc
Vss
PIN DESCRIPTION
SYMBOL
A0 - A14
DQ0 – DQ7
DESCRIPTION
Address Inputs
Data Inputs/Outputs
Chip Enable Input
Write Enable Input
Output Enable Input
Power Supply
Ground
A0-A14
DECODER
32Kx8
MEMORY ARRAY
CE#
WE#
OE#
V
CC
V
SS
DQ0-DQ7
I/O DATA
CIRCUIT
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. ]
