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DS1557 - 4MEG NV Y2KC Timekeeping RAM

Description

A0 A18 - Address Input DQ0 DQ7 IRQ/FT - Data Input/Outputs - Interrupt, Frequency Test Output (Open Drain) RST - Power-On Reset Output (Open Drain) CE - Chip Enable OE - Output Enable WE - Write Enable VCC GND - Power-Supply Input - Ground X1, X2 - Crystal Connectio

Features

  • Integrated NV SRAM, Real-Time Clock (RTC), Crystal, Power-Fail Control Circuit, and Lithium Energy Source.
  • Clock Registers are Accessed Identically to the Static RAM; These Registers Reside in the 16 Top RAM Locations.
  • Century Byte Register (i. e. , Y2K Compliant).
  • Totally Nonvolatile with Over 10 Years of Operation in the Absence of Power.
  • Precision Power-On Reset.
  • Programmable Watchdog Timer and RTC Alarm.
  • BCD-Coded Year, Month, Date, Day, Hours, Minutes, and.

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Datasheet Details

Part number DS1557
Manufacturer Dallas Semiconducotr
File Size 249.40 KB
Description 4MEG NV Y2KC Timekeeping RAM
Datasheet download datasheet DS1557 Datasheet
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Full PDF Text Transcription

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19-5501; Rev 9/10 www.maxim-ic.com DS1557 4Meg, Nonvolatile, Y2K-Compliant Timekeeping RAM FEATURES  Integrated NV SRAM, Real-Time Clock (RTC), Crystal, Power-Fail Control Circuit, and Lithium Energy Source  Clock Registers are Accessed Identically to the Static RAM; These Registers Reside in the 16 Top RAM Locations  Century Byte Register (i.e.
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