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DS1222 - BankSwitch Chip

Datasheet Summary

Description

AW-AZ CEI CEO NC BS1,BS2, BS3,BS4 PFI VCC GND - Address Inputs - Chip Enable Input - Chip Enable Output - No Connection - Bank Select Outputs - Bank Select Outputs - Power Fail Input - +5 Volts - Ground DESCRIPTION The DS1222 BankSwitch Chip is a CMOS circuit designed to select one of 16 memory

Features

  • Provides bank switching for 16 banks of memory Bank switching is software-controlled by a pattern recognition sequence on four address inputs Automatically sets all 16 banks off on power-up Bank switching logic allows only one bank on at a time Custom recognition patterns are available to prevent unauthorized access Full ±10% operating range Low-power CMOS circuitry Can be used to expand the address range of microprocessors and decoders Optional 16-pin SOIC surface mount package PIN.

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Datasheet preview – DS1222

Datasheet Details

Part number DS1222
Manufacturer Dallas
File Size 46.61 KB
Description BankSwitch Chip
Datasheet download datasheet DS1222 Datasheet
Additional preview pages of the DS1222 datasheet.

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Full PDF Text Transcription

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DS1222 BankSwitch Chip www.dalsemi.com FEATURES Provides bank switching for 16 banks of memory Bank switching is software-controlled by a pattern recognition sequence on four address inputs Automatically sets all 16 banks off on power-up Bank switching logic allows only one bank on at a time Custom recognition patterns are available to prevent unauthorized access Full ±10% operating range Low-power CMOS circuitry Can be used to expand the address range of microprocessors and decoders Optional 16-pin SOIC surface mount package PIN ASSIGNMENT CEI PFI AW AX AY AZ GND 1 2 3 4 5 6 7 14 13 12 11 10 9 8 VCC CEO BS1 BS2 BS3 BS4 NC CEI NC PFI AW AX AY AZ GND 1 2 3 4 5 6 7 8 16 15 14 13 12 11 10 9 VCC CEO NC BS1 BS2 BS3 NC BS4 DS1222 14-Pin DIP (300-mil) See Mech.
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