MM58167 NSC [National Semiconductor], MM58167 Datasheet

no-image

MM58167

Manufacturer Part Number
MM58167
Description
Microprocessor Real Time Clock
Manufacturer
NSC [National Semiconductor]
Datasheet

Available stocks

Company
Part Number
Manufacturer
Quantity
Price
Part Number:
MM58167AJ
Manufacturer:
NSC
Quantity:
556
Part Number:
MM58167AJ
Manufacturer:
NS
Quantity:
40
Part Number:
MM58167AN
Manufacturer:
NS
Quantity:
2 206
Part Number:
MM58167AN
Quantity:
5 510
Part Number:
MM58167AN
Manufacturer:
TOS
Quantity:
5 510
Part Number:
MM58167AN
Manufacturer:
NS
Quantity:
595
Part Number:
MM58167AN
Manufacturer:
NSC
Quantity:
232
Part Number:
MM58167AN-T
Manufacturer:
NSC
Quantity:
5 510
Part Number:
MM58167AN-T ?
Manufacturer:
NS
Quantity:
225
Part Number:
MM58167AV
Manufacturer:
NS
Quantity:
752
Part Number:
MM58167BN
Manufacturer:
MOT
Quantity:
550
Part Number:
MM58167BN
Manufacturer:
NS
Quantity:
4 016
Part Number:
MM58167BN-T
Manufacturer:
CY
Quantity:
883
C 1995 National Semiconductor Corporation
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 32 768 kHz crystal oscillator
Features
Y
Y
Connection Diagrams
TRI-STATE is a registered trademark of National Semiconductor Corporation
Microprocessor compatible (8-bit data bus)
Milliseconds through month counters
See NS Package Number N24A
Order Number MM58167BN
Dual-In-Line Package
Top View
TL F 11070
TL F 11070– 1
Y
Y
Y
Y
Y
Y
Y
56 bits of RAM with comparator to compare the real
time counter to the RAM data
2 INTERRUPT OUTPUTS with 8 possible interrupt
signals
POWER DOWN input that disables all inputs and out-
puts except for one of the interrupts
Status bit to indicate rollover during a read
32 768 kHz crystal oscillator
Four-year calendar (no leap year)
24-hour clock
See NS Package Number V28A
Order Number MM58167BV
PCC Package
Top View
RRD-B30M105 Printed in U S A
October 1990
TL F 11070– 2

Related parts for MM58167

MM58167 Summary of contents

Page 1

... 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 ...

Page 2

Absolute Maximum Ratings If Military Aerospace specified devices are required please contact the National Semiconductor Sales Office Distributors for availability and specifications Voltage at All Pins Operating Temperature Electrical Characteristics V Parameter Supply ...

Page 3

Functional Description Real Time Counter The real time counter is divided into 4-bit digits with 2 digits being accessed during any read or write cycle Each digit represents a BCD number and is defined in Table I Any unused bits ...

Page 4

Functional Description (Continued) TABLE II Clock RAM Bit Map for Alarm Interrupt Everyday Address Function Milliseconds Hundredths and Tenths of Seconds Seconds Minutes ...

Page 5

Functional Description (Continued) logical zero ) When switching V to the standby or power DD down mode the POWER DOWN input should logical zero at least 1 s before V is switched When switching DD V all ...

Page 6

Functional Description (Continued) Standby Interrupt Typical Characteristics Interrupt Timing Symbol Parameter t Status Register Clock to INTERRUPT OUTPUT INTON (Pin 13) High (Note 1) t Compare Valid to STANDBY INTERRUPT ...

Page 7

Write Cycle Timing Symbol Parameter t Address Valid to Write Strobe AW t Chip Select to Write Strobe CSW t Data Valid before Write Strobe DW t Write Strobe to Ready Strobe WRY t ...

Page 8

... Note 5 A ground line or ground plane guard trace should be included between pins 9 and 10 to insure the oscillator is not disturbed by the address line FIGURE 5 Typical Connection Diagram Note 6 Must use 8238 or equivalent logic to insure advanced I OW pulse so that the ready output of the MM58167B is valid by the end of 2 during the T2 microcycle ...

Page 9

... Block Diagram Physical Dimensions inches (millimeters) FIGURE 7 Molded Dual-In-Line Package (N) Order Number MM58167BN NS Package Number N24A 11070– 10 ...

Page 10

... National does not assume any responsibility for use of any circuitry described no circuit patent licenses are implied and National reserves the right at any time without notice to change said circuitry and specifications PCC Package (V) Order Number MM58167BV NS Package Number V28A 2 A critical component is any component of a life ...

Related keywords