(PDF) UM82C8167A Datasheet - Real-Time Clock

Número de pieza	UM82C8167A
Descripción	Real-Time Clock
Fabricantes	UMC
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No Preview Available ! (l)UMC UM82C8167A Real Time Clock (RTC) Feature • Microprocessor compatible (8-bit data bus) • Milliseconds through month counters • 56 bits of RAM with comparator to compare the real time counter to the RAM data • 2 INTERRUPT OUTPUTS with 8 possible interrupt signals • Single +5V power supply • POWE R DOWN input that disables all inputs and outputs except for one of the interrupts • Status bit to indicate rollover during a read • 32,768 Hz crystal oscillator • Four-year calendar (no leap year) • 24-hour clock • 24 pin dual-in-line package General Description The UM82C8167A is a Si-gate CMOS LSI used as a real time clock in micro system. This product includes an addressable real time counter, 56 bits of static RAM and two interrupt outputs. User can disable the chip from the rest of the system for standby low power operation by using of a POWER DOWN inpLIt. With an on chip oscillation circuit, it can generate the 32,768 Hz time base. Pin Configuration Block Diagram cs AD WR RDY AO A1 A2 A3 A4 OSC1 OSC2 Vss VDD POWER DOWN D7 D6 D5 D4 D3 D2 D1 DO STANDBY INTERRUPT OUTPUT INTERRUPT OUTPUT Os AD R5Y WR POWER DOWN D1 D2 D4 D5 I 7-187 1 page

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