The PD43256B 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 PD43256B is packed in 28-pin plastic DIP, 28-pin plastic SOP and 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.)
Low voltage operation (A version: V
data retention: 2.0 V (MIN.)
/OE input for easy application
100, 120, 150
Notes 1. T
40 C, V
= 3.0 V
2. Access time: 85 ns (MAX.) (V
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.
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. M10770EJCV0DS00 (12th edition)
Date Published June 2000 NS CP (K)
Printed in Japan
256K-BIT CMOS STATIC RAM
32K-WORD BY 8-BIT
= 3.0 to 5.5 V, B version: V
Operating supply Operating ambient
4.5 to 5.5
0 to 70
3.0 to 5.5
2.7 to 5.5
= 4.5 to 5.5 V)
shows major revised points.
MOS INTEGRATED CIRCUIT
= 2.7 to 5.5 V)
At data retention
1990, 1993, 1994