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.

Overview

The LC3564CM and LC3564CT-55U/70U are 8192-word

× 8-bit asynchronous silicon gate CMOS SRAMs. These

are full CMOS type SRAMs that adopt a six-transistor

memory cell and feature fast access times, low operating

power dissipation, and an ultralow standby current. These

SRAMs provide three control signal inputs: an OE input

for high-speed memory access, and two chip enable lines,

CE1 and CE2, for low power mode and device selection.

These means that these SRAMs area ideal for systems that

require low power and battery backup, and that they

support easy memory expansion. The ultralow standby

current that is a feature of these SRAMs allows them to be

used with capacitor backup as well. Since these SRAMs

support 3-V operation, they are also appropriate for use in

portable battery operated systems.

Features

• Supply voltage range:

2.7 to 5.5 V

— In 5-V operation mode: 5.0 V ±10%

— In 3-V operation mode: 3.0 V ±10%

— In 5-V operation mode:

LC3564CM, and CT-55U:

55 ns (max)

LC3564CM, and CT-70U:

70 ns (max)

— In 3-V operation mode:

LC3564CM, and CT-70U:

200 ns (max)

• Ultralow standby current

— In 5-V operation mode: 1.0 µA (Ta

≤ 70°C),

3.0 µA (Ta

≤ 85°C)

— In 3-V operation mode: 0.8 µA (Ta

≤ 70°C),

2.5 µA (Ta

≤ 85°C)

• Operating temperature range

— In 5-V operation mode: –40 to 85°C

— In 3-V operation mode: –40 to 85°C

• Data retention supply voltage: 2.0 to 5.5 V

• All input and output levels:

— In 5-V operation mode: TTL compatible levels

• Three control inputs: OE, CE1, and CE2

• Shared input and output pins, three-state outputs

• No clock required

• Packages

28-pin SOP (450 mil) plastic package: LC3564CM

28-pin TSOP (8

× 13.4 mm) plastic package: LC3564CT

CMOS IC

80502RM (OT) No. 6635-1/11

SANYO Electric Co.,Ltd. Semiconductor Company

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

64K (8192-word

× 8-bit) SRAM with OE, CE1, and CE2

Control Pins

LC3564CM, 3564CT-55U/70U

Ordering number : ENN6635A