DS1558 - Watchdog Clock

Dallas Semiconducotr

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Datasheet Details

Part number	DS1558
Manufacturer	Dallas Semiconducotr
File Size	298.76 KB
Description	Watchdog Clock
Datasheet	DS1558_DallasSemiconducotr.pdf

DS1558 Product details

Description

PIN 1, 13, 39 41, 43 2 3 4 5 6 7 8 9 10 11 12 14 27 29 30 31 32 36 44 15 16 17 19 20 21 22 23 18, 45, 48 24 NAME N.C.A18 A16 A14 A12 A7 A6 A5 A4 A3 A2 A1 A0 A10 A11 A9 A8 A13 A15 A17 DQ0 DQ1 DQ2 DQ3 DQ4 DQ5 DQ6 DQ7 GND CER No Connection FUNCTION Address Inputs for Address Decode.The DS1558 uses the address inputs to determine whether or not a read or write cycle should be directed to the attached SRAM or to the RTC registers.Data Input/Outputs.Data input/output pins for the RTC registe

Features

Integrated Real-Time Clock (RTC), PowerFail Control Circuit, and NV RAM Controller.
Clock Registers are Accessed Identically to the Static RAM; These Registers are Resident in the 16 Top RAM Locations.
Century Register.
Greater than 10 Years of Timekeeping and Data Retention in the Absence of Power with Small Lithium Coin Cell(s) and Low-Leakage SRAM.
Precision Power-On Reset.
Programmable Watchdog Timer and RTC Alarm.
BCD-Coded Year, Month, Date, Day, Hours,.

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Published: Sep 21, 2005 |