Product Summary

The BQ3287MT-SB2 is a real-time clock rtc module providing a time-of-day clock and 100-year calendar with alarm features and battery operation. Other features include three maskable interrupt sources, squarewave output, and 114 bytes of general nonvolatile storage. The BQ3287MT-SB2 version is identical to the BQ3287MT-SB2, with the addition of the RAM clear input.The BQ3287MT-SB2 is a fully compatible real-time clock for IBM ATcompatible computers and other applications. The BQ3287MT-SB2 writeprotects the clock, calendar, and storage registers during power failure. The integral backup energy source then maintains data and operates the clock and calendar.

Parametrics

BQ3287MT-SB2 absolute maximum ratings: (1) VCC DC voltage applied on VCC relative to VSS: -0.3 to 7.0 V; (2) VT DC voltage applied on any pin excluding VCC; (3)relative to VSS: -0.3 to 7.0 V, VT≤VCC + 0.3; (4) TOPR Operating temperature: 0 to +70 °C Commercial, -20 to +70 °C Extended “I”; (5) TSTG Storage temperature: -40 to +70 °C Commercial, -40 to +70 °C Extended “I”; (6) TBIAS Temperature under bias: -10 to +70 °C Commercial, -20 to +70 °C Extended “I”; (7) TSOLDER Soldering temperature: 260 °C For 10 seconds.

Features

BQ3287MT-SB2 features: (1) Direct clock/calendar replacement for IBMAT-compatible computers and other applications; (2) Functionally compatible with the DS1287/DS1287A and MC146818A; (3) 114 bytes of general nonvolatile storage; (4) Integral lithium cell and crystal; (5) 160 ns cycle time allows fast bus operation; (6) Selectable Intel or Motorola bus timing; (7) 14 bytes for clock/calendar and control; (8) BCD or binary format for clock and calendar data.

Diagrams

<IMG alt=" BQ3287MT-SB2 pin connection" src="http://www.seekic.com/uploadfile/ic-mfg/201212332833528.jpg" border=0>
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