The PD43256B-X is a high speed, low power, and 262,144 bits (32,768 words by 8 bits) CMOS static RAM.
The PD43256B-X is an extended-operating-temperature version of the PD43256B (X version : T
C). And A and B versions are low voltage operations. Battery backup is available.
The PD43256B-X is packed in 28-pin plastic TSOP (I) (8 x 13.4 mm).
32,768 words by 8 bits organization
Fast access time: 70, 85, 100, 120, 150 ns (MAX.)
Operating ambient temperature: T
Low voltage operation (A version: V
data retention: 2.0 V (MIN.)
/OE input for easy application
, 100, 120
Notes 1. T
40 C, V
= 3.0 V
2. 100 s (MAX.) (V
This Data sheet can be applied to the version X. Each version is identified with its lot number. Letter X in the fifth
character position in a lot number signifies version X.
The information in this document is subject to change without notice. Before using this document, please
confirm that this is the latest version.
Not all devices/types available in every country. Please check with local NEC representative for
availability and additional information.
Document No. M11012EJ4V0DSJ1 (4th edition)
Date Published December 2000 NS CP (K)
Printed in Japan
256K-BIT CMOS STATIC RAM
32K-WORD BY 8-BIT
EXTENDED TEMPERATURE OPERATION
= –25 to +85 C
= 3.0 to 5.5 V, B version: V
Operating supply Operating ambient
4.5 to 5.5
25 to +85
3.0 to 5.5
2.7 to 5.5
= 4.5 to 5.5 V)
shows major revised points.
MOS INTEGRATED CIRCUIT
= –25 to +85
= 2.7 to 5.5 V)
At data retention