DS1642 - Nonvolatile Timekeeping RAM

Maxim Integrated

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Datasheet Details

Part number	DS1642
Manufacturer	Maxim Integrated
File Size	139.26 KB
Description	Nonvolatile Timekeeping RAM
Datasheet	DS1642-MaximIntegrated.pdf

DS1642 Product details

Description

PIN NAME FUNCTION 1 A7 2 A6 3 A5 4 A4 5 A3 6 A2 Address Input 7 A1 8 A0 19 A10 22 A9 23 A8 9 DQ0 10 DQ1 11 DQ2 13 14 DQ3 DQ4 Data Input/Output 15 DQ5 16 DQ6 17 DQ7 12 GND Ground 18 CE Active-Low Chip-Enable Input 20 OE Active-Low Output-Enable Input 21 WE Active-Low Write-Enable Input 24 VCC Power-Supply Input DS1642 DESCRIPTION The DS1642 is a 2k x 8 nonvolatile static RAM and a full-function real-time clock (RTC), both of which are accessible in a bytewide format.The

Features

Integrated NV SRAM, Real-Time Clock, Crystal, Power-Fail Control Circuit, and Lithium Energy Source.
Standard JEDEC Bytewide 2k x 8 Static RAM Pinout.
Clock Registers are Accessed Identically to the Static RAM. These Registers are Resident in the Eight Top RAM Locations.
Totally Nonvolatile with Over 10 Years of Operation in the Absence of Power.
Access Times of 85ns and 100ns.
Quartz Accuracy ±1 Minute a Month at +25°C, Factory Calibrated.
BCD-Coded Year, Mon.

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Published: Mar 27, 2020 |