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MCP794XX I2C™ RTCC Brochure

MCP794XX I2C™ RTCC Brochure
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I2C™ Real-Time Clock/Calendar Low cost and feature rich, with memory and battery switchover M i c r o c h i p T e c h n o l o g y I n c o r p o r a t e d Pin Functions Name Pin Pin Functions X1 1 Xtal/Input X2 2 Xtal/Output VBAT 3 Battery Backup VSS 4 Ground SDA 5 Serial Data I/O SCL 6 Serial Clock MFP 7 Interrupt*/Clock Output VCC 8 Supply Voltage ¡ As crystal frequency drifts, would you like to keep accurate time by loading a calibration value? ¡ If system power is lost, would you like to know how long power has been off? ¡ Do you have size and cost constraints that would benefi t from the embedded memory? ¡ Is your MAC Address programming ineffi cient and could benefi t from a preprogrammed device? Ordering Information Block Diagram MCP7941X Features ¡ Real-Time Clock/Calendar (RTCC) – Alarm counter down to the second – Programmable alarm or clock output – Digital trimming for higher accuracy ¡ User Memory – Battery-backed SRAM: 64 bytes – EEPROM: 1 Kbit – Unique ID: 64 bits of protected EEPROM ¡ Low Power – Minimum operating and backup voltages: VCC = 1.8V, VBAT = 1.3V – Typical operating and backup currents: ICC < 400 ìA @ 3V IBAT < 700 nA @ 1.8V – Battery Switchover with Timestamp ¡ Industry-Standard Pinout – 8-pin packages

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Information subject to change. The Microchip name and logo, the Microchip logo, PIC and UNI/O are registered trademarks of Microchip Technology Incorporated in the U.S.A. and other countries. PICDEM, PICkit and PICtail are trademarks of Microchip Technology Incorporated in the U.S.A. and other countries. All other trademarks mentioned herein are property of their respective companies. © 2010, Microchip Technology Incorporated. All Rights Reserved. Printed in the U.S.A. 10/10 DS22238B *DS22238B* Visit our web site for additional product information and to locate your local sales office....

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