DS1647/DS1647P

Nonvolatile Timekeeping RAM

www.artschip.com

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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 Through 2099

Power-Fail Write Protection Allows for ±10% Vcc Power-Supply Tolerance

DS1647 Only (DIP Module):

Standard JEDEC Byte-Wide 128k x 8 RAM Pinout

DS1647P Only (PowerCap ® Module Board):

Surface Mountable Package for Direct

Connection to PowerCap Containing

Battery and Crystal

Replaceable Battery (PowerCap)

Power-Fail Output

Pin-for -Pin Compatible with Other Densities of DS164XP Timekeeping RAM

ORDERING INFORMATION

PART

TEMP RANGE

PIN-PACKAGE

TOP MARK**

DS1647-120

0

℃ to +70℃

32 EDIP (0.740a)

DS1647-120

DS1647-120+

0

℃ to +70℃

32 EDIP (0.740a)

DS1647-120

DS1647P-120

0

℃ to +70℃

34 PowerCap*

DS1647P-120

DS1647P-120+

0

℃ to +70℃

PowerCap*

DS1647P-120

DS9034PCX

0

℃ to +70℃

PowerCap

DS9034PC

DS9034PCX+

0

℃ to +70℃

PowerCap

DS9034PC

*DS9034PCX required (must be ordered separately).

**A “+” indicates lead-free. The top mark includes a “+” symbol on lead-free devices.

PIN CONFIGURATIONS

TOP VIEW

PowerCap is a registered trademark of ARTSCHIP Semiconductor.