Microchip MCP7940MT-I/SN

时钟/日历警报器，闰年，方波输出，SRAM64B

Overview

The Microchip MCP7940MT-I/SN is Real-Time Clock Calendar (RTCC) that supports I²C communications. The MCP7940MT-I/SN includes a digital trimming circuit for accuracy which can compensate for crystal tolerance and temperature.The MCP7940MT-I/SN features a multi-functional output that can be configured as an alarm output, to output a selectable frequency square wave or as a general purpose output.

2-Wire Serial Interface, I²C™ Compatible: I²C clock rate up to 400 kHzOn-Chip Digital Trimming/Calibration: ±1 ppm resolution, ±129 ppm rangeTracks Hours, Minutes, Seconds, Day of Week, Day, Month and YearLeap Year Compensated to 239912/24 Hour ModesOscillator for 32.768 kHz Crystals: Optimised for 6-9 pF crystalsDual Programmable AlarmsVersatile Output PinWide Operating Voltage Range: 1.8V to 5.5VLow Typical Timekeeping Current: 1.2μA at 3.3V

Features

Tape & Reel (TR) Package
8-SOIC (0.154, 3.90mm Width) package
8 terminations
2/5V power supplies

Surface Mount Mounting Type

Applications

There are a lot of Microchip Technology
MCP7940MT-I/SN Real Time Clocks applications.

• Copy machines
• Mobile equipment
• Battery powered devices
• Printers and copiers
• Electronic metering
• Digital cameras
• White goods
• Elapsed time counter
• Network powered devices
• Battery backed up systems