M41T93

www.DataSheet4U.com M41T93 Serial SPI bus RTC with battery switchover Preliminary Data Feature summary ■ ■ ■ 2.0 to 5.5V clock operating voltage Ultra-low battery supply current of 365nA Counters for tenths/hundredths of seconds, seconds, minutes, hours, day, date, month, year, and century Programmable clock calibration (analog and digital) 18 QFN16, 4mm x 4mm (QA) ■ ■ Automatic switch-over and reset output circuitry (fixed reference) – M41T93S: VCC = 3.0V to 5.5V (2.85V ≤VRST ≤3.00V) – M41T93R: VCC = 2.7V to 5.5V (2.55V ≤VRST ≤2.70V) – M41T93Z: VCC = 2.38V to 5.50V (2.25V ≤VRST ≤2.38V) Compatible with SPI Bus serial interface (positive clock SPI modes) Programmable alarm with interrupt function (valid even during battery back-up mode) Optional 2nd programmable alarm available Square wave output (defaults to 32kHz on power-up) RESET (RST) output Watchdog timer Programmable 8-bit counter/timer 7 Bytes of battery-backed user SRAM Battery low flag Power-down time stamp (HT Bit) Low operating current of 80µA Oscillator stop detection Battery or super-cap™ Back-up Operating temperature of –40°C to 85°C ■ 1 SOX18 (MY, 18-pin, 300mil SOIC with Embedded Crystal) ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ Package options include: – a 16-Lead QFN or an 18-Lead Embedded Crystal SOIC RoHS Compliance: lead-free components are compliant with the RoHS directive. ■ August 2006 Rev 1 1/49 www.st.com 49 This is preliminary information on a new product now in development or undergoing evaluatio...