DATA SHEET
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MOS INTEGRATED CIRCUIT
µPD43256B
256K-BIT
CMOS STATIC RAM 32K-WORD BY 8-BIT
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 (L, LL, A, and B versions).
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).
Features
• 32,768 words by 8 bits organization • Fast access time: 70, 85, 100, 120, 150 ns (MAX.
) • Wide
voltage range (A version: VCC = 3.
0 to 5.
5 V, B version: VCC = 2.
7 to 5.
5 V) • 2 V data retention • OE input for easy application
Operating supply
voltage V 4.
5 to 5.
5 ...