NXP Semiconductors ICM7555ID/01,112

Overview

ICM7555ID/01,112 from NXP Semiconductors is a CMOS precision timer IC operating as a direct functional replacement for NE/SE555 in most circuits, delivering 80 µA typical supply current, 20 pA typical trigger/threshold/reset input currents, rail-to-rail output swing, and guaranteed 500 kHz oscillator frequency across −40 °C to +85 °C. It enables accurate monostable time delays and astable oscillation with adjustable duty cycle in industrial timing control and pulse generation systems.

For engineers reviewing the ICM7555ID/01,112 datasheet, ICM7555ID/01,112 pinout, ICM7555ID/01,112 application, or ICM7555ID/01,112 equivalent, this page provides verified specifications, validated SO8 package mapping, confirmed pin functions per NXP Rev. 02 datasheet, and two rigorously cross-checked alternative parts for precision timing designs requiring low-power, wide-voltage (3–16 V), and high-impedance timing networks.

Technical Context

The ICM7555ID/01,112 implements dual high-impedance CMOS comparators feeding an SR flip-flop, with independent TRIGGER (active LOW) and THRESHOLD inputs controlling state transitions at precisely 1/3 VDD and 2/3 VDD thresholds. Its discharge transistor operates as an open-drain switch tied to pin 7, enabling capacitor discharge paths in both monostable and astable configurations.

No internal crowbarring current occurs during output transitions-unlike bipolar 555s-so supply decoupling is typically unnecessary. The CONTROL_VOLTAGE pin (pin 5) directly modulates comparator reference levels, permitting voltage-controlled frequency or delay tuning without external components.

Key Specifications

Pinout & Package

ICM7555ID/01,112 is supplied in an SO8 (SOT96-1) plastic small outline package, 8-lead, 3.9 mm body width, with gull-wing leads and standard JEDEC MS-012 footprint.

Key Features

Applications

Equivalent & Alternatives

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

Compared with TLC555CDR and NE555D, the ICM7555ID/01,112 delivers superior timing accuracy over temperature and supply voltage due to its lower input leakage, tighter frequency stability (0.005 %/°C), and absence of supply transients-making it optimal for industrial-grade precision timing where long-term reliability and minimal component count are critical.

Availability

ICM7555ID/01,112 is available at Aetrix Electronics and suitable for industrial control, factory automation, and smart lighting applications requiring stable component supply, extended temperature operation, and low-power timing functionality.

Supply support for ICM7555ID/01,112 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

NXP Semiconductors is a global semiconductor company headquartered in Eindhoven, Netherlands, specializing in secure connectivity solutions for automotive, industrial, and IoT markets.

The ICM7555ID/01,112 belongs to NXP's general-purpose analog timer product line, designed specifically to replace legacy bipolar 555 timers with CMOS efficiency while maintaining full functional compatibility and enhancing precision in industrial timing systems.

FAQ

What is the operating temperature range of the ICM7555ID/01,112?

The ICM7555ID/01,112 is rated for operation from −40 °C to +85 °C, making it suitable for industrial environments where ambient temperatures exceed commercial-grade limits. This range is validated per NXP's Rev. 02 datasheet and applies to the SO8 package variant ICM7555ID/01,112. Performance parameters including supply current, input leakage, and frequency stability are guaranteed across this full span without derating.

Does the ICM7555ID/01,112 require a decoupling capacitor on the CONTROL_VOLTAGE pin?

No, the ICM7555ID/01,112 does not require a decoupling capacitor on the CONTROL_VOLTAGE (pin 5) due to its extremely high input impedance (20 pA typical leakage). Unlike the NE/SE555, the internal CMOS comparators eliminate the need for external bypassing-reducing BOM count and PCB area. This is explicitly confirmed in Section 11.1 of the NXP datasheet.

Can the ICM7555ID/01,112 directly drive TTL logic loads?

Yes, the ICM7555ID/01,112 can directly drive at least two standard TTL loads when VDD ≥ 4.5 V, as specified in Section 11.3 of the NXP datasheet. Its output stage sources/sinks up to 3.2 mA with rail-to-rail swing, ensuring compatible VOH and VOL levels across the full 3–16 V supply range-eliminating the need for external buffer stages in mixed-logic systems.

What is the maximum guaranteed oscillator frequency for the ICM7555ID/01,112?

The ICM7555ID/01,112 guarantees a minimum oscillator frequency of 500 kHz in astable mode, as stated in Table 5 of the NXP datasheet. This specification holds across the full −40 °C to +85 °C temperature range and 3–16 V supply voltage, enabling reliable high-speed pulse generation without derating or margining.

Is the ICM7555ID/01,112 pin-compatible with the NE555?

Yes, the ICM7555ID/01,112 is pin-compatible with the NE555 in SO8 (SOT96-1) and DIP8 packages, sharing identical pin numbering and function mapping per Figures 2 and 3 of the NXP datasheet. However, its CMOS architecture eliminates crowbarring current and reduces supply current by >100×-allowing drop-in replacement in most circuits without layout changes.