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參數(shù)資料
型號: MM58167MWC
廠商: NATIONAL SEMICONDUCTOR CORP
元件分類: 時鐘/數(shù)據(jù)恢復(fù)及定時提取
英文描述: 0 TIMER(S), REAL TIME CLOCK, UUC24
封裝: WAFER-24
文件頁數(shù): 1/13頁
文件大小: 195K
代理商: MM58167MWC
TLF11070
MM58167B
Microprocessor
Real
Time
Clock
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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