DS1743W-70 Datasheet PDF – Nonvolatile Timekeeping RAM

Part Number: DS1743W-70

Function: Y2K-Compliant, Nonvolatile Timekeeping RAM

Package: 28 Pin, 34 Pin Type

Manufacturer: Maxim Integrated


DS1743W-70 datasheet



The DS1743W-70 is a full-function, year-2000-compliant (Y2KC), real-time clock/calendar (RTC) and 8k x 8 nonvolatile static RAM. User access to all registers within the DS1743 is accomplished with a bytewide interface as shown in Figure 1. The RTC information and control bits reside in the eight uppermost RAM locations.



1. Integrated NV SRAM, Real-Time Clock, Crystal, Power-Fail Control Circuit, and Lithium Energy Source

2. Clock Registers are Accessed Identically to the Static RAM. These Registers Reside in the Eight Top RAM Locations.

3. Century Byte Register

4. Totally Nonvolatile with Over 10 Years of Operation in the Absence of Power

5. BCD-Coded Century, Year, Month, Date, Day, Hours, Minutes, and Seconds with
Automatic Leap Year Compensation Valid through 2099

6. Low-Battery-Voltage Level Indicator Flag Power-Fail Write Protection Allows for ±10% VCC Power-Supply Tolerance

7. Lithium Energy Source is Electrically Disconnected to Retain Freshness Until
Power is Applied for the First Time

8. DIP Module Only, Standard JEDEC Bytewide 8k x 8 Static, RAM Pinout

Other data sheets are available within the file:

DS1743-100+, DS1743-100IND+, DS1743-70, DS1743-85+, DS1743P-100+


DS1743W-70 Datasheet PDF Download

DS1743W-70 pdf