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M41ST95WMH6 데이터시트(PDF) 1 Page - STMicroelectronics |
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M41ST95WMH6 데이터시트(HTML) 1 Page - STMicroelectronics |
1 / 35 page 1/35 September 2004 M41ST95Y* M41ST95W 5.0 or 3.0V, 512 bit (64 bit x8) Serial RTC (SPI) SRAM and NVRAM Supervisor * Contact Local Sales Office FEATURES SUMMARY ■ 5.0 OR 3.0V OPERATING VOLTAGE ■ SERIAL PERIPHERAL INTERFACE (SPI) ■ NVRAM SUPERVISOR FOR EXTERNAL LPSRAM ■ 2.5 TO 5.5V OSCILLATOR OPERATING VOLTAGE ■ AUTOMATIC SWITCH-OVER AND DESELECT CIRCUITRY ■ CHOICE OF POWER-FAIL DESELECT VOLTAGES: – M41ST95Y*: VCC = 4.5 to 5.5V 4.20V ≤ VPFD ≤ 4.50V – M41ST95W: VCC = 2.7 to 3.6V 2.55V ≤ VPFD ≤ 24.70V ■ 1.25V REFERENCE (FOR PFI/PFO) ■ COUNTERS FOR TENTHS/HUNDREDTHS OF SECONDS, SECONDS, MINUTES, HOURS, DAY, DATE, MONTH, YEAR, AND CENTURY ■ 44 BYTES OF GENERAL PURPOSE RAM ■ PROGRAMMABLE ALARM and INTERRUPT FUNCTION (VALID EVEN DURING BATTERY BACK-UP MODE) ■ WATCHDOG TIMER ■ MICROPROCESSOR POWER-ON RESET ■ BATTERY LOW FLAG ■ 32kHz FREQUENCY OUTPUT AVAILABLE IMMEDIATELY UPON POWER-ON (300mil SO28 MX PACKAGE ONLY) ■ AUTOMATICALLY RECORDS TIME WHEN POWER-FAIL OCCURS ■ ULTRA-LOW BATTERY SUPPLY CURRENT OF 550nA (MAX) ■ 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 Figure 1. 28-pin SOIC Package* Figure 2. 28-pin (300mil) SOIC Package 28 1 SOH28 (MH) SNAPHAT (SH) Battery & Crystal SOX28 (MX) Embedded Crystal |
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