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©

1990, 1993, 1994

MOS INTEGRATED CIRCUIT

256K-BIT CMOS STATIC RAM

32K-WORD BY 8-BIT

DATA SHEET

Document No. M10770EJCV0DS00 (12th edition)

Date Published June 2000 NS CP (K)

Printed in Japan

The mark 5 shows major revised points.

Description

The

µPD43256B is a high speed, low power, and 262,144 bits (32,768 words by 8 bits) CMOS static RAM.

Battery backup is available. And A and B versions are wide voltage operations.

The

µPD43256B is packed in 28-pin plastic DIP, 28-pin plastic SOP and 28-pin plastic TSOP (I) (8 x 13.4 mm).

Features

• 32,768 words by 8 bits organization

• Fast access time: 70, 85, 100, 120, 150 ns (MAX.)

• /OE input for easy application

Part number

Access time

Operating supply Operating ambient

Supply current

ns (MAX.)

voltage

temperature

At operating

At standby

At data retention

V

°C

mA (MAX.)

µA (MAX.)

µPD43256B-xxL

70, 85

4.5 to 5.5

0 to 70

45

50

3

µPD43256B-xxLL

15

2

µPD43256B-Axx

85, 100

3.0 to 5.5

100, 120, 150

2.7 to 5.5

Version X and P

This Data sheet can be applied to the version X and P. Each version is identified with its lot number. Letter X in the

fifth character position in a lot number signifies version X, letter P, version P.

D43256B

Lot number

JAPAN