DS1646 - Nonvolatile Timekeeping RAM

Maxim Integrated

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Datasheet Details

Part number	DS1646
Manufacturer	Maxim Integrated
File Size	383.84 KB
Description	Nonvolatile Timekeeping RAM
Datasheet	DS1646-MaximIntegrated.pdf

DS1646 Product details

Description

PIN PDIP PowerCap NAME 1, 30 1, 33, 34 N.C.23 A16 3 32 A14 4 30 A12 5 25 A7 6 24 A6 7 23 A5 8 22 A4 9 21 A3 10 20 A2 11 19 A1 12 18 A0 25 29 A11 26 27 A9 27 26 A8 28 31 A13 13 16 DQ0 14 15 DQ1 15 14 DQ2 17 13 DQ3 18 12 DQ4 19 11 DQ5 20 10 DQ6 21 9 DQ7 16 17 GND 22 8 CE 23 28 A10 24 7 OE 29 6 WE 31 2 A15 32 5 VCC 4 PFO X1, X2, VBAT No Connection FUNCTION DS1646/DS1646P Address Input Data Input/Output Grou

Features

Integrates NV SRAM, Real-Time Clock, Crystal, Power-Fail Control Circuit and Lithium Energy Source.
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.
BCD-Coded Year, Month, Date, Day, Hours, Minutes, and Seconds with Leap Year Compensation Valid Up to 2100.
Power-Fail Write Protection Allows for ±10% VCC Power Supply Toleran.

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Published: Mar 27, 2020 |