Supplier for ICM7170IDG in USA: Specifications, Features, Applications, and Sourcing Guide

 KunFinding a reliable supplier for ICM7170IDG in USA can be important for engineers maintaining legacy embedded systems, industrial controllers, data-logging equipment, telecommunications hardware, and other electronics that require dependable real-time clock functionality. The ICM7170IDG is a microprocessor-compatible real-time clock (RTC) from the Intersil ICM7170 family. It combines timekeeping, calendar functions, programmable counters, alarm functions, battery-backup capability, and an 8-bit microprocessor interface in a 24-pin package. The ICM7170 is now an obsolete product with no recommended replacement listed by Renesas, making original-part sourcing particularly relevant for legacy designs.

 

What Is the ICM7170IDG?

The ICM7170IDG is a CMOS real-time clock/calendar device originally developed by Intersil. The ICM7170 family was designed as a microprocessor bus-compatible peripheral, allowing an 8-bit processor to read and write time and calendar information through its bidirectional data bus.

Unlike modern serial RTCs that commonly use I²C or SPI, the ICM7170 uses a parallel microprocessor interface and supports both multiplexed and direct addressing. This makes it particularly suitable for older computer systems, industrial controllers, instrumentation, and embedded equipment designed around parallel processor buses.

The ICM7170IDG version is associated with a 24-pin ceramic DIP package, with available parametric information specifying an industrial operating range of approximately -40°C to +85°C and a nominal 5 V supply.

ICM7170IDG Key Specifications

Parameter	ICM7170IDG
Device Type	Real-Time Clock / Calendar
Family	ICM7170
Original Manufacturer	Intersil
Interface	8-bit microprocessor-compatible parallel bus
Addressing	Direct or multiplexed
Package	24-pin ceramic DIP
Technology	CMOS
Nominal Supply	5 V
Supply Range	Approximately 4.5 V to 5.5 V
Operating Temperature	Approximately -40°C to +85°C
Maximum Clock Frequency	Up to approximately 4.1943 MHz
Timekeeping Range	1/100 second to 99 years
Calendar	Automatic leap-year correction
Backup	On-chip battery switchover
Status	Obsolete / legacy device

The exact electrical limits and timing specifications should always be checked against the applicable datasheet revision before designing or repairing equipment. The available ICM7170 documentation specifies an 8-bit bidirectional bus, selectable crystal frequencies, battery backup, alarm functionality, and low-power standby operation.

Key Features of ICM7170IDG

Microprocessor-Compatible 8-Bit Interface

One of the defining features of the ICM7170 is its compatibility with an 8-bit microprocessor bus.

The device can operate using either multiplexed or direct addressing. This architecture was particularly useful in systems based on older microprocessors and microcontrollers where a parallel peripheral interface was preferred.

The RTC can be accessed by the host processor to:

· Read the current time

· Set the clock

· Read calendar information

· Configure alarms

· Access programmable counters

· Control periodic interrupts

This makes the ICM7170 substantially more than a simple clock oscillator.

Complete Calendar Function

The ICM7170 includes a complete calendar with automatic leap-year correction. The device handles the relationship between months and dates rather than requiring the host processor to perform all calendar calculations in software.

This is particularly valuable in data loggers and industrial equipment where accurate timestamps are needed over long operating periods.

Wide Timekeeping Range

The ICM7170 provides time information ranging from 1/100 second through years, allowing the same device to support both high-resolution timing and conventional calendar functions.

Its internal counters are separately addressable and programmable, providing flexibility for different timing requirements.

Programmable Crystal Oscillator

The oscillator is driven from an external crystal, and the crystal frequency can be selected through the on-chip command register.

The device documentation describes multiple programmable crystal oscillator frequencies, including options for industrial-temperature operation. An on-chip regulated oscillator supply helps improve frequency stability while maintaining low power consumption.

Battery Backup

The ICM7170 integrates a battery-backup switchover circuit. When the primary power supply is removed, the backup supply can maintain the clock operation.

This is an important feature for systems where time information must survive:

· Power interruptions

· Equipment shutdown

· Maintenance

· Battery-backed operation

· Temporary loss of mains power

The result is that a controller can restart while retaining accurate date and time information.

Low-Power Standby Operation

The ICM7170 was designed with low-power operation in mind. The documentation specifies standby operation at very low current under appropriate conditions, making the architecture suitable for battery-backed timekeeping.

This characteristic is particularly useful in systems that spend long periods in standby but still need to preserve the current time.

Applications of ICM7170IDG

Industrial Control Systems

One of the most important application areas for the ICM7170 is industrial control.

Industrial controllers frequently need to know not only what is happening, but also when it happened.

For example, a controller may record:

· Machine startup

· Equipment shutdown

· Fault conditions

· Maintenance events

· Temperature measurements

· Production cycles

· Operator actions

The ICM7170 can provide the timestamping function required by such systems.

In older industrial controllers designed around an 8-bit parallel bus, replacing the original RTC with a modern serial device may require extensive firmware and PCB changes. Maintaining the ICM7170 architecture can therefore be a practical repair strategy.

Data Logging Equipment

Data acquisition and logging systems depend heavily on accurate timestamps.

Consider an environmental monitoring system recording temperature, pressure, humidity, or vibration. The measured value becomes considerably more useful when associated with an accurate date and time.

The ICM7170 can provide the time base for:

Sensor → Data Acquisition System → Processor → ICM7170 Timestamp → Memory

This architecture can be used in legacy monitoring equipment, laboratory instruments, industrial data loggers, and test systems.

Industrial Measurement Instruments

Electronic measurement equipment often needs to associate measurements with specific times.

Examples include:

· Process monitoring instruments

· Laboratory equipment

· Test instruments

· Power analyzers

· Calibration systems

· Recording meters

The ICM7170's calendar and timing functions allow an embedded processor to maintain time information without continuously calculating calendar transitions in software.

Its automatic leap-year correction is particularly useful for equipment expected to remain operational for long periods.

Portable and Personal Computers

The original ICM7170 documentation lists portable and personal computers among its applications.

Legacy computer systems frequently required an RTC to maintain system time when the main processor was powered down.

The battery-backed clock allowed the computer to retain:

· Date

· Time

· Calendar information

· Scheduled events

This application is historically important because it demonstrates how the ICM7170's parallel bus architecture was intended to integrate with processor-based systems.

Point-of-Sale Systems

Point-of-sale equipment is another application listed for the ICM7170 family.

A POS terminal may need timestamps for:

· Sales transactions

· Receipts

· Daily reports

· System events

· Security records

Reliable timekeeping becomes particularly important when transaction records must be correlated with external accounting or inventory systems.

Legacy POS systems may use a parallel-bus RTC such as the ICM7170 rather than the serial RTC interfaces common in newer equipment.

Telecommunications Equipment

Telecommunications equipment often needs timing information for event logging, maintenance, diagnostics, and scheduled operations.

The ICM7170 can provide a local real-time reference for systems that record:

· Communication faults

· Configuration changes

· Maintenance operations

· System restarts

· Scheduled events

For older telecommunications hardware, the 8-bit parallel interface can be easier to integrate with the original processor architecture than a modern serial RTC.

Security and Alarm Systems

Alarm systems can use real-time clock functionality for scheduled operation and event recording.

Applications can include:

· Security panels

· Access-control systems

· Fire-alarm equipment

· Industrial security controllers

A battery-backed RTC allows the system to preserve time during power interruptions.

For example, a security controller can record when an access event occurred even if the main power supply has previously experienced an outage.

Automotive and Transportation Electronics

Real-time clocks are also useful in automotive and transportation electronics for event recording, scheduling, and system diagnostics.

Legacy systems may use an RTC to maintain:

· Service records

· Event timestamps

· Navigation-related time information

· Diagnostic logs

· Scheduled functions

Although newer automotive systems typically use more modern RTC and processor architectures, the ICM7170 can remain important when maintaining older electronic control systems.

Medical and Laboratory Equipment

Medical and laboratory instruments often need accurate timestamps for measurements and events.

Examples include:

· Patient monitoring equipment

· Laboratory analyzers

· Diagnostic instruments

· Sample tracking equipment

· Automated test systems

The RTC can allow the host processor to associate measurement records with exact times.

When repairing older instruments, maintaining the original ICM7170-based architecture may be preferable to introducing a new RTC interface and rewriting firmware.

Embedded Control and Legacy Computer Systems

The ICM7170 is particularly valuable in legacy embedded systems.

Its 8-bit bus and direct/multiplexed addressing reflect the processor architectures common when the device was introduced. Many older machines continue to operate because their mechanical systems remain functional, even though their electronic components have become obsolete.

For these systems, the ICM7170 can be an important replacement component.

Related ICM7170 Models

Engineers searching for ICM7170IDG may encounter related variants such as ICM7170IPG, ICM7170AIBG, ICM7170IJI, and ICM7170IDGZ.

For example, UTSOURCE lists the ICM7170IPG as an ICM7170 real-time clock in a 24-pin DIP package, while its ICM7170AIBG listing identifies a 24-pin SOP package.

The ICM7170IDGZ also appears in industry datasheet databases as a related ICM7170 variant.

However, these suffixes can represent differences in package, materials, temperature specifications, or other ordering characteristics. They should not automatically be considered drop-in replacements.

When repairing a legacy PCB, engineers should verify:

· Exact suffix

· Package

· Pin configuration

· Supply voltage

· Temperature rating

· Bus timing

· Crystal requirements

· Backup power arrangement

ICM7170IDG Replacement Considerations

The ICM7170 is officially documented as an obsolete product with no recommended replacement by Renesas.

This makes component sourcing particularly important for equipment that was designed specifically around this RTC.

A modern RTC such as a serial-interface device may offer better features, but replacing the ICM7170 can require:

· PCB modification

· Interface conversion

· Firmware changes

· New timing routines

· Different backup circuitry

· New software drivers

For a production machine or legacy instrument, obtaining the original ICM7170IDG can therefore be more practical than redesigning the entire RTC section.

Finding a Supplier for ICM7170IDG in USA

When looking for a supplier for ICM7170IDG in USA, buyers should search using the complete part number because several ICM7170 package and ordering variants exist.

Before ordering, verify:

· ICM7170IDG marking

· Manufacturer or authorized legacy source

· 24-pin package

· Ceramic DIP construction

· Temperature range

· Supply requirements

· Product condition

· Date code, if important

· Quantity

· Replacement compatibility

For legacy equipment, product condition is particularly important because obsolete components may be offered as new old stock, refurbished parts, or used components.

Order ICM7170IDG from UTSOURCE

For customers searching for a supplier for ICM7170IDG in USA, UTSOURCE provides an online sourcing platform for electronic components, including hard-to-find and legacy ICs.

Customers can search for ICM7170IDG, review available product information and purchasing options, and place an order according to their requirements. Buyers working on legacy equipment should verify the exact suffix and package before ordering.

Conclusion

The ICM7170IDG is a specialized CMOS microprocessor-compatible real-time clock/calendar designed for processor-based systems that require accurate timekeeping, calendar management, alarms, periodic interrupts, and battery-backed operation. Its 8-bit parallel interface, programmable crystal oscillator, automatic leap-year correction, and integrated backup switchover make it particularly suitable for the industrial and embedded systems of its generation.

Its applications include industrial control systems, data loggers, measurement instruments, portable computers, point-of-sale equipment, telecommunications systems, security equipment, medical instruments, and legacy embedded controllers. These applications benefit from reliable timestamping, especially when equipment must continue tracking time through power interruptions.

The ICM7170 family also demonstrates why obsolete components can remain strategically important. A modern RTC may be technically superior, but it may not be compatible with an existing parallel-bus design. For a legacy machine, instrument, or controller, obtaining the exact ICM7170IDG can reduce redesign work and help preserve the original hardware and firmware architecture.

For organizations searching for a supplier for ICM7170IDG in USA, UTSOURCE offers an online sourcing option for specialized electronic components. Searching for the exact ICM7170IDG part number and carefully checking the package, suffix, electrical requirements, and product condition before purchase can help engineers and procurement teams source this legacy RTC more efficiently.

ICM7170IDG https://www.utsource.net/itm/p/330715.html