DS1340, DS1340C I²C實(shí)時(shí)時(shí)鐘，帶

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DS1340, DS1340C? I2C實(shí)時(shí)時(shí)鐘，帶有涓流充電器，可通過(guò)軟件進(jìn)行校準(zhǔn)

The DS1340 is a real-time clock (RTC)/calendar that is pin compatible and functionally equivalent to the ST M41T00, including the software clock calibration. The device additionally provides trickle-charge capability on the V_BACKUP pin, a lower timekeeping voltage, and an oscillator STOP flag. Block access of the register map is identical to the ST device. Two additional registers, which are accessed individually, are required for the trickle charger and flag. The clock/calendar provides seconds, minutes, hours, day, date, month, and year information. A built-in power-sense circuit detects power failures and automatically switches to the backup supply. The device is programmed serially through an I2C bidirectional bus.

關(guān)鍵特性

Enhanced Second Source for the ST M41T00

Available in a Surface-Mount Package with an Integrated Crystal (DS1340C)

Fast (400kHz) I2C Interface

Software Clock Calibration

RTC Counts Seconds, Minutes, Hours, Day, Date, Month, and Year

Automatic Power-Fail Detect and Switch Circuitry

Trickle-Charge Capability

Low Timekeeping Voltage Down to 1.3V

Three Operating Voltage Ranges (1.8V, 3V, and 3.3V)

Oscillator Stop Flag

Available in 8-Pin μSOP or SO Packages