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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 preview – DS1557

Datasheet Details

Part number DS1557
Manufacturer Dallas Semiconducotr
File Size 249.40 KB
Description 4MEG NV Y2KC Timekeeping RAM
Datasheet download datasheet DS1557 Datasheet
Additional preview pages of the 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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