Contextual Info: DALLAS s e m ic o n d u c to r D S1644LPM Nonvolatile Timekeeping RAM FEATURES PIN ASSIGNMENT • Upward compatible with the DS1643AL Timekeeping RAM to achieve higher RAM density NC NC A14 A13 A12 A11 A10 A9 A8 A7 A6 A5 A4 A3 A2 A1 AO • Integrated NV SRAM, real time clock, crystal, powertail control circuit and lithium energy source

Contextual Info: DS1 6 44iD S1644LPM DALLAS SEMICONDUCTOR DS1644/DS1 644LPM Nonvolatile Timekeeping RAM FEATURES PI N A S S I G N M E N T • Upw ar d c o m pati ble with the D S 1 6 4 3 Tim eke ep in g RAM • Int egrated NV S R A M , real time clock, crystal, power fail con tro l circuit and lithium energy sou rce

MK48T08

Abstract: 34-PIN DS1644 DS1644LPM
Contextual Info: S1644LPM DALLAS s e m ic o n d u c to r D S 1644 LPM Nonvolatile Tim ekeeping RAM FEATURES PIN ASSIGNMENT • U pward com patible with the DS1643AL Tim ekeeping RAM to achieve higher RAM density • Integrated NV SRAM, real tim e clock, crystal, p o w e rfail control circuit and lithium energy source

Contextual Info: S1644LPM DALLAS s e m ic o n d u c to r S1644LPM Nonvolatile Timekeeping RAM FEATURES PIN ASSIGNMENT • Upward com patible with the DS1643AL Tim ekeeping RAM to achieve higher RAM density 34 33 32 31 30 29 28 27 26 25 24 23 • Integrated NVS R AM , real time clock, crystal, p o w e rfail control circuit and lithium energy source

Contextual Info: DS1644/D S 1644LPM SEMICONDUCTOR DALLAS DS1644/DS 1644 LPM Nonvolatile Timekeeping RAM FEATURES PIN ASSIGNMENT A14 • Upward compatible with the DS1643 Timekeeping RAM A12 A7 • Integrated NV SRAM, real time clock, crystal, powerfail control circuit and lithium energy source