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M48T18 Datasheet(PDF) 1 Page - STMicroelectronics |
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M48T18 Datasheet(HTML) 1 Page - STMicroelectronics |
1 / 30 page July 2007 Rev 8 1/30 1 M48T08 M48T08Y, M48T18 5V, 64Kbit (8 Kb x 8) TIMEKEEPER® SRAM Features ■ Integrated ultra low power sram, real time clock, power-fail control circuit, and battery ■ BYTEWIDE™ RAM-like clock access ■ BCD coded year, month, day, date, hours, minutes, and seconds ■ Typical clock accuracy of ±1 minute a month, at 25°C ■ Automatic power-fail chip deselect and write protection ■ Write protect VPFD = Power-fail deselect voltage): –M48T08: VCC = 4.75 to 5.5V 4.5V ≤ VPFD ≤ 4.75V – M48T18/T08Y: VCC = 4.5 to 5.5V 4.2V ≤ VPFD ≤ 4.5V ■ Software controlled clock calibration for high accuracy applications ■ Self-contained battery and crystal in the CAPHAT™ dip package ■ Packaging includes a 28-lead SOIC and SNAPHAT® top (to be ordered separately) ■ SOIC package provides direct connection for a snaphat top which contains the battery and crystal ■ Pin and function compatible with DS1643 and JEDEC standard 8K x8 SRAMs ■ RoHS compliant – Lead-free second level interconnect 28 1 PCDIP28 (PC) battery/crystal CAPHAT 28 1 SNAPHAT (SH) battery/crystal SOH28 (MH) www.st.com |
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