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Part Name(s) : MM58174A MM58174AN National-Semiconductor
National ->Texas Instruments
Description : MICROPROCESSOR-COMPATIBLE REAL-TIME CLOCK View

General Description
The MM58174A is a low-threshold metal-gate CMOS circuit that functions as a REAL-TIME CLOCK and calendar in bus-oriented MICROPROCESSOR systems. The device includes an interrupt TIMEr which may be programmed to one of three TIMEs. TIMEkeeping is maintained down to 2.2V to allow low power standby battery operation. The TIMEbase is generated from a 32768 Hz crystal-controlled oscillator.

Features
MICROPROCESSOR COMPATIBLE
■ Tenths of seconds, seconds, tens of seconds, minutes,
   tens of minutes, day of week, days, tens of days,
   months, tens of months, independent registers
■ Automatic leap year calculation
■ Internal pull-ups to safeguard data
■ Protection for read during data changing
■ Independent interrupt system with open drain output
■ TTL COMPATIBLE
■ Low power standby operation (2.2V, 10 mA)
■ Low cost internally biased oscillator
■ Low cost 16-pin dual-in-line package
■ Available for commercial and military temperature
   ranges

Applications
■ Point-of-sale terminals
■ Word processors
■ Teller terminals
■ Event recorders
MICROPROCESSOR-controlled instrumentation
MICROPROCESSOR TIME CLOCK
■ TV/VCR reprogramming
■ Intelligent telephone

Part Name(s) : MSM5832 OKI
Oki Electric Industry
Description : MICROPROCESSOR REAL-TIME CLOCK/CALENDAR View

MICROPROCESSOR REAL-TIME CLOCK/CALENDAR

Part Name(s) : NS32FX211 NS32FX211N NS32FX211V National-Semiconductor
National ->Texas Instruments
Description : MICROPROCESSOR COMPATIBLE REAL TIME CLOCK View

General Description
The NS32FX211 is fabricated using low threshold CMOS technology and is designed to operate in bus oriented MICROPROCESSOR systems where a REAL TIME CLOCK and calendar function are required. The on-chip 32.768 kHz crystal controlled oscillator will maintain TIMEkeeping down to 2.2V to allow low power standby battery operation.

Features
■ Low power standby operation (10 μA at 2.2V)
■ 16-pin DIP and 20-pin PLCC
TIMEkeeping from tenths to seconds to tens of years in independently accessible registers
■ Leap year register
■ Hours counter programmable for 12 or 24-hour operation
■ Fully TTL/CMOS COMPATIBLE

Applications
■ Fax machines
■ Laser printers
■ Word processors
■ Data logging
■ Industrial process control

Part Name(s) : ICM7170 ICM7170AIBG ICM7170AIBGT ICM7170AIDG ICM7170AIPG ICM7170AMDG ICM7170IBG ICM7170IBGT ICM7170IDG ICM7170IPG ICM7170MDG ROCHESTER
Rochester Electronics
Description : MICROPROCESSOR-COMPATIBLE, REAL-TIME CLOCK View

The ICM7170 REAL TIME CLOCK is a MICROPROCESSOR bus COMPATIBLE peripheral, fabricated using Intersil’s silicon gate CMOS LSl process. An 8-bit bidirectional bus is used for the data I/O circuitry. The CLOCK is set or read by accessing the 8 internal separately addressable and programmable counters from 1/100 seconds to years. The counters are controlled by a pulse train divided down from a crystal oscillator circuit, and the frequency of the crystal is selectable with the on-chip command register. An extremely stable oscillator frequency is achieved through the use of an on-chip regulated power supply.

Features
• 8-Bit, µP Bus COMPATIBLE
    - Multiplexed or Direct Addressing
• Regulated Oscillator Supply Ensures Frequency Stability and Low Power
TIME From 1/100 Seconds to 99 Years
• Software Selectable 12/24 Hour Format
• Latched TIME Data Ensures No Roll Over During Read
• Full Calendar with Automatic Leap Year Correction
• On-Chip Battery Backup Switchover Circuit
• Access TIME Less than 300ns
• 4 Programmable Crystal Oscillator Frequencies Over Industrial Temperature Range
• 3 Programmable Crystal Oscillator Frequencies Over Military Temperature Range
• On-Chip Alarm Comparator and RAM
• Interrupts from Alarm and 6 Selectable Periodic Intervals
• Standby Micro-Power Operation: 1.2µA Typical at 3.0V and 32kHz Crystal

Applications
• Portable and Personal Computers
• Data Logging
• Industrial Control Systems
• Point Of Sale


Part Name(s) : MM58167 MM58167B MM58167BN MM58167BN-T MM58167BV MM58167BVX MM58167MWC National-Semiconductor
National ->Texas Instruments
Description : MICROPROCESSOR REAL TIME CLOCK View

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
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
■ POWER DOWN input that disables all inputs and outputs 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

 

Part Name(s) : ICM7170AIBG ICM7170AIPG ICM7170IBG ICM7170IPG ICM7170 ICM7170 ICM7170IPG ICM7170IDG ICM7170IBG ICM7170MDG ICM7170AIPG ICM7170AIDG ICM7170AIBG ICM7170AMDG Intersil
Intersil
Description : MICROPROCESSOR-COMPATIBLE, REAL-TIME CLOCK View

The ICM7170 REAL TIME CLOCK is a MICROPROCESSOR bus COMPATIBLE peripheral, fabricated using Intersil’s silicon gate CMOS LSl process. An 8-bit bidirectional bus is used for the data I/O circuitry. The CLOCK is set or read by accessing the 8 internal separately addressable and programmable counters from 1/100 seconds to years. The counters are controlled by a pulse train divided down from a crystal oscillator circuit, and the frequency of the crystal is selectable with the on-chip command register. An extremely stable oscillator frequency is achieved through the use of an on-chip regulated power supply.

Features
• 8-Bit, µP Bus COMPATIBLE
    - Multiplexed or Direct Addressing
• Regulated Oscillator Supply Ensures Frequency Stability and Low Power
TIME From 1/100 Seconds to 99 Years
• Software Selectable 12/24 Hour Format
• Latched TIME Data Ensures No Roll Over During Read
• Full Calendar with Automatic Leap Year Correction
• On-Chip Battery Backup Switchover Circuit
• Access TIME Less than 300ns
• 4 Programmable Crystal Oscillator Frequencies Over Industrial Temperature Range
• 3 Programmable Crystal Oscillator Frequencies Over Military Temperature Range
• On-Chip Alarm Comparator and RAM
• Interrupts from Alarm and 6 Selectable Periodic Intervals
• Standby Micro-Power Operation: 1.2µA Typical at 3.0V and 32kHz Crystal

Applications
• Portable and Personal Computers
• Data Logging
• Industrial Control Systems
• Point Of Sale

Part Name(s) : UM82C8167 UMC
UMC Corporation
Description : REAL-TIME CLOCK(RTC) View

REAL-TIME CLOCK(RTC)

Part Name(s) : MC68HC68 MC68HC68T1 MC68HC68T1DW MC68HC68T1P Motorola
Motorola => Freescale
Description : REAL-TIME CLOCK plus RAM with Serial Interface View

REAL-TIME CLOCK plus RAM with Serial Interface CMOS

TheMC68HC68T1 HCMOS CLOCK/RAM peripheral contains a REALTIME CLOCK/calendar,a 32x 8 static RAM, and a synchronous, serial, three–wire interface for communication with a microcontroller or processor. Operating in a
burstmode, successive CLOCK/RAM locations can be read or written using only asingle starting address. An on–chiposcillator allows acceptance of a selectable crystal frequency or the device can be programmed to accept a
50/60 Hz line input frequency.

• Full CLOCK Features — Seconds, Minutes, Hours (AM/PM), Day–of–Week, Date, Month, Year (0 – 99), Auto Leap Year
• 32–Byte General Purpose RAM
• Direct Interface to Motorola SPI and National MICROWIRESerial Data Ports
• Minimum TIMEkeeping Voltage: 2.2 V
• Burst Mode for Reading/Writing Successive Addresses in CLOCK/RAM
• Selectable Crystal or 50/60 Hz Line Input Frequency
CLOCK Registers Utilize BCD Data
• Buffered CLOCK Output for Driving CPU CLOCK, TIMEr, Colon, or LCD Backplane
• Power–On Reset with First TIME–Up Bit
• Freeze Circuit Eliminates Software Overhead During a CLOCK Read
• Three Independent Interrupt Modes — Alarm, Periodic, or Power–Down
• CPU Reset Output — Provides Orderly Power–Up/Power–Down
• Watchdog Circuit
• Pin–for–Pin Replacement for CDP68HC68T1
• Chip Complexity: 8500 FETs or 2125 Equivalent Gates
• Also See Application Notes ANE425 “Use of the MC68HC68T1 RTC with M6805 MICROPROCESSOR”, AN457 “Providing a REALTIME CLOCK for the MC68302”, and AN1065 “Use of the MC68HC68T1 REALTIME CLOCK with
Multiple TIME Bases”

Part Name(s) : NJU6350 NJU6350C NJU6350R JRC
Japan Radio Corporation
Description : SERIAL I/O REAL TIME CLOCK View

■ GENERAL DESCRIPTION
The NJU6350 is a serial I/O REAL TIME CLOCK suitable for 4 bits micro-processor.
It contains quartz crystal oscillator, counter, shift register, voltage regulator, voltage detector, and interface controller.
The NJU6350 required only 3-port of MICROPROCESSOR for data transfer, and the MICROPROCESSOR can receive the data at any TIME when the MICROPROCESSOR requires.
The operating voltage is as wide as 2.0V to 5.5V, consequently, the NJU6350 can count accurate TIME data even if the back up period.
Furthermore, the long TIME back up is available as the current consumption during the back up period is less than 2µA.

■ FEATURES
● Operating Voltage : 3.0V ± 20%
                                   2.0V to 5.5V ( The CLOCK operation )
● Low operating current : 0.8 µA ( Typ. ) at 2.0V
                                         2.0 µA ( Max. ) at 2.0V
● BCD Counts of Seconds, Minutes, Hours, Days of Week,
                                                           Date, Month and Year
● Required only 3-port ( DATA, CLK and CE )
● Low Battery Detector ( Low voltage alarm signal output )
● Automatic Leap Year Compensation : Up to AD 2099
● Package Outline            : VSP 8 / Chip
● C-MOS Technology

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