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M4T28-BR12SH1 Datasheet(PDF) 1 Page - STMicroelectronics |
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M4T28-BR12SH1 Datasheet(HTML) 1 Page - STMicroelectronics |
1 / 28 page November 2007 Rev 6 1/28 1 M48T35AV 3.3V, 256Kbit (32Kbit 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 ■ Battery low flag (BOK) ■ Frequency test output for real-time clock ■ Automatic power-fail chip deselect and write protection ■ Write protect voltages (VPFD = Power-fail deselect voltage): –M48T35AY: VCC = 4.5 to 5.5V 4.2V ≤ VPFD ≤ 4.5V –M48T35AV: VCC = 3.0 to 3.6V 2.7V ≤ VPFD ≤ 3.0V ■ Self-contained battery and crystal in the CAPHAT™ DIP package ■ SOIC package provides direct connection for a SNAPHAT® housing containing the battery and crystal ■ SNAPHAT® housing (battery and crystal) is replaceable ■ Pin and function compatible with JEDEC standard 32Kbit x 8 SRAMs ■ RoHS compliant – Lead-free second level interconnect 28 1 28 1 PCDIP28 (PC) battery/crystal CAPHAT SNAPHAT (SH) battery/crystal SOH28 (MH) www.st.com |
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