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MM58167B Datasheet(PDF) 1 Page - National Semiconductor (TI)

[Old version datasheet] Texas Instruments acquired National semiconductor.
Part No. MM58167B
Description  Microprocessor Real Time Clock
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Maker  NSC [National Semiconductor (TI)]
Homepage  http://www.national.com
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MM58167B Datasheet(HTML) 1 Page - National Semiconductor (TI)

 
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TLF11070
October 1990
MM58167B
Microprocessor Real Time Clock
General Description
The MM58167B is a low threshold metal gate CMOS circuit
that functions as a real time clock in bus oriented microproc-
essor systems The device includes an addressable real
time counter 56 bits of RAM and two interrupt outputs A
POWER DOWN input allows the chip to be disabled from
the rest of the system for standby low power operation The
time base is a 32768 kHz crystal oscillator
Features
Y
Microprocessor compatible (8-bit data bus)
Y
Milliseconds through month counters
Y
56 bits of RAM with comparator to compare the real
time counter to the RAM data
Y
2 INTERRUPT OUTPUTS with 8 possible interrupt
signals
Y
POWER DOWN input that disables all inputs and out-
puts except for one of the interrupts
Y
Status bit to indicate rollover during a read
Y
32768 kHz crystal oscillator
Y
Four-year calendar (no leap year)
Y
24-hour clock
Connection Diagrams
Dual-In-Line Package
TLF11070 – 1
Top View
Order Number MM58167BN
See NS Package Number N24A
PCC Package
TLF11070 – 2
Top View
Order Number MM58167BV
See NS Package Number V28A
TRI-STATE
is a registered trademark of National Semiconductor Corporation
C1995 National Semiconductor Corporation
RRD-B30M105Printed in U S A


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