UPD43257B Datasheet 256k-bit CMOS Static Ram 32k-word By 8-bit

Manufacturer: NEC (now Renesas Electronics)

Overview: DATA SHEET MOS INTEGRATED CIRCUIT µPD43257B 256K-BIT CMOS STATIC RAM 32K-WORD BY.

Datasheet Details

Part number	UPD43257B
Manufacturer	NEC (now Renesas Electronics)
File Size	157.83 KB
Description	256K-BIT CMOS STATIC RAM 32K-WORD BY 8-BIT
Datasheet	UPD43257B_NEC.pdf

The µPD43257B is a high speed, low power, and 262,144 bits (32,768 words by 8 bits) CMOS static RAM.

Battery backup is available.

And the µPD43257B has two chip enable pins (/CE1, CE2) to extend the capacity.

32,768 words by 8 bits organization.
Fast access time: 70, 85 ns (MAX. ).
Low VCC data retention: 2.0 V (MIN. ).
Two Chip Enable inputs: /CE1, CE2 Part number Access time ns (MAX. ) Operating supply Operating ambient voltage V temperature °C 0 to 70 At operating mA (MAX. ) 45 45 Supply current At standby At data retention µA (MAX. ) 50 15 µA (MAX. ) Note 3 2 µPD43257B-xxL µPD43257B-xxLL 70, 85 4.5 to 5.5 Note TA ≤ 40 °C, VCC = 3.0 V Version X This Data sheet.

Brand Logo	Part Number	Description	Manufacturer
	UPD43257A	256K CMOS RAM	NEC Electronics

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