ICM7556IPD

Programmable Timers And Oscillators Overview

The ICM7556IPD is a dual CMOS analog RC timer manufactured by Analog Devices (formerly Maxim Integrated). It integrates two independent 555-type timers within a single 14-pin PDIP package. The device operates on a supply voltage range of 2 V to 18 V, with a maximum power dissipation of 300 mW. It supports frequencies up to 500 kHz and functions across an operating temperature range of -20°C to +85°C. The output drivers are compatible with both CMOS and TTL logic families, facilitating direct interfacing with various digital systems.

Programmable Timers And Oscillators Feature Summary

• Dual Timer Configuration: Contains two independent general-purpose timers in one package.
• Low Power Consumption: Features low supply current typical of CMOS technology.
• Wide Supply Voltage Range: Operates reliably from 2 V to 18 V.
• Logic Compatibility: Outputs are compatible with standard CMOS and TTL logic levels.

Programmable Timers And Oscillators Applications

• General-purpose timing circuits requiring dual channels.
• Pulse width modulation (PWM) generation.
• Sequential timing events.
• Oscillator applications for clock signals.

Programmable Timers And Oscillators Procurement Notes

Verify the manufacturer designation carefully, as Harris Corporation was acquired by L3Harris Technologies, while the ICM7556 part number originates from the former Harris Semiconductor division now owned by Analog Devices/Maxim Integrated. Confirm RoHS compliance status and check for active manufacturing status or obsolescence notices from the current manufacturer before procurement.

Programmable Timers And Oscillators Selection Notes

Select the ICM7556IPD when dual independent timers are required in a through-hole DIP-14 package. Ensure the application voltage stays within the 2 V to 18 V range. Consider the 500 kHz frequency limit for high-speed timing needs. Verify that the thermal dissipation requirements fit within the 300 mW limit for the intended ambient temperature conditions.

Programmable Timers And Oscillators Part Context

The ICM7556 is part of the ICM755x series of CMOS timers, which are pin-compatible and functionally similar to the classic NE555/NE556 bipolar timers but with significantly lower power consumption. The 'IPD' suffix denotes the 14-pin Plastic Dual In-line Package. This component is widely used in legacy designs and modern low-power applications where CMOS efficiency is prioritized over the higher drive current of bipolar counterparts.

Programmable Timers And Oscillators Replacement Considerations

Direct replacements include the ICM7556ISD+T (SOIC package) or other CMOS dual timers like the TLC556IDR from Texas Instruments. Verify pinout compatibility and electrical specifications such as supply voltage range and output drive capability when substituting.