Ordering number : ENN6304

12800RM (OT) No. 6304-1/6

Overview

The LC35W256EM-10W and LC35W256ET-10W are

asynchronous silicon-gate CMOS SRAMs with a 32768-

word by 8-bit structure. These are full-CMOS devices

with 6 transistors per memory cell, and feature ultralow-

voltage operation, a low operating current drain, and an

ultralow standby current. Control inputs include OE for

fast memory access and CE for power saving and device

selection. This makes these devices optimal for systems

that require low power or battery backup, and makes

memory expansion easy. The ultralow standby current

allows these devices to be used with capacitor backup as

well.

Features

• Supply voltage range: 2.7 to 3.6 V

• Access time: 100 ns (maximum)

• Standby current: 0.8 µA (Ta

≤ 60°C)

4.0 µA (Ta

≤ 70°C)

• Operating temperature: –10 to +70°C

• Data retention voltage: 2.0 to 3.6 V

• Input/output shared function pins, 3-state output pins

• No clock required (fully static circuits)

• Package

28-pin SOP (450 mil) plastic package:

LC35W256EM-10W

28-pin TSOP (8

× 13.4 mm) plastic package:

LC35W256ET-10W

Package Dimensions

unit: mm

3187A-SOP28D

unit: mm

3221-TSOP28 (Type I)

LC35W256EM, ET-10W

SANYO Electric Co.,Ltd. Semiconductor Company

TOKYO OFFICE Tokyo Bldg., 1-10, 1 Chome, Ueno, Taito-ku, TOKYO, 110-8534 JAPAN

256K (32K words

× 8 bits) SRAM

Control pins: OE and CE

CMOS IC

1

14

15

28

18.0

1.27

0.4

0.15

SANYO: SOP28D

[LC35W256EM-10W]

Any and all SANYO products described or contained herein do not have specifications that can handle

applications that require extremely high levels of reliability, such as life-support systems, aircraft’s

control systems, or other applications whose failure can be reasonably expected to result in serious

physical and/or material damage. Consult with your SANYO representative nearest you before using

any SANYO products described or contained herein in such applications.

SANYO assumes no responsibility for equipment failures that result from using products at values that

exceed, even momentarily, rated values (such as maximum ratings, operating condition ranges, or other

parameters) listed in products specifications of any and all SANYO products described or contained

herein.

0.55

22

7

21

8

1

28

8.1

0.2

0.125

SANYO: TSOP28 (Type I)

[LC35W256ET-10W]