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UPD445L - FULLY DECODED 4096 STATIC CMOS RAM

Datasheet Summary

Description

I I ' CE2).

Features

  • Single +5V Power Supply.
  • Ideal for Battery Operation.
  • Low Standby Power fllr Dat,a Retention.
  • Simple Memory Expansion - Chip Enable Inputs.
  • Access Time - 650 ns Max. {J,tPD445L) 4.50 ns Max. (~PD445L-1).
  • Directly TTL Compatible - All Inputs and Outputs.
  • Common Data Input and Output.
  • Static CMOS - No Clock or Refreshing Required.
  • 20 Pin Dual-In-Line Plastic Package PIN.

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Datasheet Details

Part number UPD445L
Manufacturer NEC
File Size 233.46 KB
Description FULLY DECODED 4096 STATIC CMOS RAM
Datasheet download datasheet UPD445L Datasheet
Additional preview pages of the UPD445L datasheet.

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Full PDF Text Transcription

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NEe Microcomputers, Inc. NEe fLPD445L fLPD445L·1 FULLY DECODED 4096 STATIC CMOS RAM DESCRIPTION The ~PD445L is a very low power 4,,096 bit (1024 words by 4 bits) static RAM fabricated with NEC's complementary MOS (CMOS) process, It has two chip enable inputs (CE1, I I ' CE2). Minimum standby current is drawn when CE1 is at a high level, while inhibiting all address and control line transitions or, unconditionally when CE2 is at a low level. This device ideally meets the low power requirements of battery operated systems and battery back-up systems for non-volatility of data. The ~PD445L uses fully static circuitry requiring no clocking. Output data is read out non-destructively by placing a high on the R/W pin and has the same polarity as input data.
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