Renesas ICM7555IPA

Overview

ICM7555IPA from Renesas Electronics is a CMOS general-purpose timer IC, functionally equivalent to the classic NE555 but with significantly improved performance: 60µA supply current, 2V–18V operating voltage, 20pA input currents, and 1MHz max oscillator frequency. It operates in monostable and astable modes for precision timing, pulse generation, and time-delay circuits in industrial control and instrumentation.

For engineers reviewing the ICM7555IPA datasheet, ICM7555IPA pinout, ICM7555IPA application, or ICM7555IPA equivalent, this page delivers verified technical context, validated pin functions, real-world application cards, and two confirmed alternative parts - all grounded in the official FN2867 Rev.10.01 datasheet and Renesas package documentation.

Technical Context

The ICM7555IPA implements a dual-comparator + SR flip-flop architecture with high-impedance CMOS inputs, eliminating crowbar current during output transitions and removing the need for Control Voltage decoupling. Its internal comparators feature precisely ratioed trip points (Trigger ≈ 1/3 VDD, Threshold ≈ 2/3 VDD) and sub-10nA input leakage.

Timing accuracy is maintained across temperature (0.005%/°C drift at +25°C) and supply voltage (0.5%/V drift), enabling stable microsecond-to-hour delays using high-impedance RC networks. The output stage provides rail-to-rail CMOS-compatible swing with 20mA sink/source capability.

Key Specifications

Pinout & Package

ICM7555IPA is housed in an 8-lead PDIP (Plastic Dual-In-Line Package) per JEDEC MS-001-BA, outline E8.3, with 0.300-inch body width and 0.100-inch lead pitch. RoHS-compliant matte tin plating (e3 finish) supports both SnPb and Pb-free soldering.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar timer IC applications.

Compared with TLC555CP and NE555P, the ICM7555IPA delivers superior temperature stability (0.005%/°C vs typical 0.01%/°C), lower leakage (20pA vs 100pA), and guaranteed –25°C operation - making it optimal for industrial timing where long-term accuracy and cold-start reliability are critical.

Availability

ICM7555IPA is available at Aetrix Electronics and suitable for precision timing, pulse generation, time delay generation, and missing pulse detection requiring stable component supply across industrial temperature ranges.

Supply support for ICM7555IPA includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.

Manufacturer

Renesas Electronics is a global semiconductor leader delivering microcontrollers, analog, power, and timing solutions for automotive, industrial, and IoT applications.

The ICM7555IPA belongs to Renesas' legacy precision timer product line, designed specifically for engineers replacing aging bipolar 555 timers with CMOS equivalents that deliver lower power, wider voltage range, and enhanced timing accuracy without redesign.

FAQ

What is the operating temperature range of the ICM7555IPA?

The ICM7555IPA is rated for –25°C to +85°C operation, matching the "I" grade specification in the FN2867 datasheet. This industrial temperature range enables reliable deployment in factory automation, outdoor instrumentation, and motor control environments where ambient temperatures exceed commercial-grade limits. The device maintains timing accuracy and output drive capability across this full span.

Does the ICM7555IPA require a decoupling capacitor on the Control Voltage pin?

No, the ICM7555IPA does not require a decoupling capacitor on the Control Voltage (pin 5) because its CMOS input presents extremely high impedance (20pA leakage). Unlike bipolar 555 timers, the internal comparators draw negligible current, so external noise rejection is achieved through layout rather than capacitance - reducing BOM count and PCB area. This is explicitly confirmed in the FN2867 datasheet Section "Control Voltage".

Can the ICM7555IPA replace a standard NE555 in an existing design?

Yes, the ICM7555IPA is a direct pin-compatible and functionally equivalent replacement for the NE555 in most applications. It uses identical pinout, logic thresholds, and output behavior while improving supply current (60µA vs 10mA), input leakage (20pA vs 500nA), and supply range (2V–18V vs 4.5V–16V). No PCB or schematic changes are needed - only verify timing resistor/capacitor values remain valid under the lower leakage conditions.

What is the maximum load the ICM7555IPA output can drive?

The ICM7555IPA output can sink up to 20mA at VDD = 5V (VOL ≤ 0.4V) and source up to 0.8mA at VDD = 5V (VOH ≥ 4.0V). At 15V, it sinks 15mA (VDIS ≤ 0.4V) and sources 0.8mA (VOH ≥ 14.3V). This allows direct driving of two standard TTL loads or CMOS logic families without external buffers, as confirmed in the "Output Voltage" and "Discharge Output Voltage" specifications on page 4 of FN2867.

Is the ICM7555IPA RoHS compliant?

Yes, the ICM7555IPA is RoHS compliant and features 100% matte tin plate (e3 termination finish), as documented in Note 2 of the Ordering Information table (page 2, FN2867 Rev.10.01). It meets IPC/JEDEC J-STD-020 reflow requirements and is compatible with both SnPb and Pb-free soldering processes - critical for modern manufacturing compliance.