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M48T37V-10MH1E
M48T37Y M48T37V 5.0 or 3.3 V, 256 Kbit (32 Kbit x 8) TIMEKEEPER® SRAM Features ■ Integrated ultra low power SRAM, real-time clock, power-fail control circuit, and battery ■ Frequency test output for real-time clock software calibration ■ Automatic power-fail chip deselect and WRITE protection ■ Watchdog timer ■ WRITE protect voltage (VPFD = Power-fail deselect voltage): – M48T37Y: VCC = 4.5 to 5.5 V 4.2 V ≤ VPFD ≤ 4.5 V – M48T37V: VCC = 3.0 to 3.6 V 2.7 V ≤ VPFD ≤ 3.0 V SNAPHAT® (SH) Battery/crystal 44 1 ■ Packaging includes a 44-lead SOIC and SNAPHAT® top (to be ordered separately) ■ SOIC package provides direct connection for a SNAPHAT® top which contains the battery and crystal ■ Microprocessor power-on reset (valid even during battery backup mode) ■ Programmable alarm output active in the battery backup mode ■ Battery low flag ■ SOH44 (MH) 44-pin SOIC RoHS compliant – Lead-free second level interconnect August 2010 Doc ID 7019 Rev 9 1/30 www.st.com 1
STM
STMicroelectronics NV
スイス
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