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DS1234 - Conditional Nonvolatile Controller Chip

Description

VCCO NC RAM Supply No Connection CEI Chip Enable Input WEI Write Enable Input CEO Chip Enable Output to RAM WEO Write Enable Output to RAM GND Ground PF Power Fail Output A0-A3 Address Inputs VBAT

Features

  • Converts CMOS static RAMs into nonvolatile memories.
  • Software-controlled write inhibit.
  • Software-controlled battery disconnect extends battery life.
  • Unconditionally write protects when VCC is out of tolerance.
  • Consumes less than 100 nA of battery current.
  • Power fail signal can be used to interrupt processor on power failure.
  • Low forward voltage drop on the VCC switch.
  • Optional 16-pin SOIC surface mount package PIN.

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Datasheet preview – DS1234

Datasheet Details

Part number DS1234
Manufacturer Dallas
File Size 71.46 KB
Description Conditional Nonvolatile Controller Chip
Datasheet download datasheet DS1234 Datasheet
Additional preview pages of the DS1234 datasheet.

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Full PDF Text Transcription

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DS1234 DS1234 Conditional Nonvolatile Controller Chip FEATURES • Converts CMOS static RAMs into nonvolatile memories • Software-controlled write inhibit • Software-controlled battery disconnect extends battery life • Unconditionally write protects when VCC is out of tolerance • Consumes less than 100 nA of battery current • Power fail signal can be used to interrupt processor on power failure • Low forward voltage drop on the VCC switch • Optional 16-pin SOIC surface mount package PIN ASSIGNMENT VCCO 1 14 VCCI NC CEI WEI CEO WEO GND 2 3 4 5 6 7 13 VBAT VCCO 1 16 VCCI 12 A3 11 A2 10 A1 9 A0 NC 2 15 VBAT NC 3 14 NC CEI 4 13 A3 WEI 5 12 A2 CEO 6 11 A1 WEO 7 10 A0 8 PF GND 8 9 PF DS1234 14-Pin DIP (300 MIL) DS1234S 16-Pin SOIC (300 MIL) PIN DESCRIPTION VCCO NC – RAM Supply –
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