DS1557 - 4MEG NV Y2KC Timekeeping RAM

Dallas Semiconducotr

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Datasheet Details

Part number	DS1557
Manufacturer	Dallas Semiconducotr
File Size	249.40 KB
Description	4MEG NV Y2KC Timekeeping RAM
Datasheet	DS1557_DallasSemiconducotr.pdf

DS1557 Product details

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 Connection VBAT - Battery Connection Note: Some revisions of this device may incorporate deviations from published specifications known as errata.Multiple revisions of any device may be simultaneously avai

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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Published: Sep 21, 2005 |