TI LMC555CM /NOPB

Mfr. Part

LMC555CM/NOPB

Manufacturer

Luminary Micro/Texas Instruments. Y-IC is a quality distributor of this brand, and we are committed to delivering the best products, genuine sourcing, and responsive service.

Detailed Description

Low-power CMOS 555 timer IC for precision timing and pulse generation. Functions as monostable (one-shot), astable (oscillator), or bistable. Operates from a single supply and keeps classic 555 behavior with much lower power than bipolar 555 types. The “CM” suffix denotes the SOIC/SOP-8 surface-mount package; “/NOPB” indicates lead-free, RoHS-compliant plating.

Key Features

CMOS 555 timer, pin-compatible with legacy 555 designs

Wide single-supply operation (typical 1.5 V to 15 V range; check datasheet)

Very low supply current compared with bipolar NE555

Stable timing: thresholds track at about 1/3 and 2/3 of VCC

Built-in reset input and control-voltage pin for modulation

Push-pull output stage compatible with TTL/CMOS logic levels

Works from very low frequencies to hundreds of kHz (typical; application-dependent)

ESD protection and latch-up-resistant CMOS construction

Compact 8-pin SOP/SOIC footprint for easy SMT assembly

Lead-free, RoHS-compliant (/NOPB)

Key Advantages

Low power draw extends battery life

Drop-in 555-compatible timing solution with improved efficiency

Simple RC timing for cost-effective designs

Small package saves PCB area and supports automated assembly

Versatile: one part covers delay, oscillation, PWM, and pulse-shaping needs

Packaging

Type: SOP-8 / SOIC-8 surface-mount package

Material: Molded epoxy body with copper alloy leadframe; matte-tin, lead-free plating (NoPb)

Typical body size: about 4.9 mm × 3.9 mm × 1.5 mm; 1.27 mm lead pitch (verify exact dimensions in datasheet)

Pin configuration (standard 555):

1 GND

2 TRIGGER

3 OUTPUT

4 RESET

5 CONTROL VOLTAGE

6 THRESHOLD

7 DISCHARGE

8 VCC

Thermal characteristics: typical θJA on SOIC-8 is in the ~100–200 °C/W range depending on PCB; follow datasheet, JEDEC board conditions, and layout guidance

Electrical summary (see datasheet for limits): single-supply operation, CMOS thresholds near 1/3 and 2/3 VCC, push-pull output sources/sinks moderate current, frequency range from Hz to hundreds of kHz, commercial temperature grade for “C” versions (commonly 0°C to +70°C; confirm in datasheet), RoHS compliant

Lifecycle

Current status: Active and broadly supported; not near discontinuation based on publicly available information

Equivalent or alternative models (verify specs, timing equations, and output drive before substitution):

- Texas Instruments TLC555D (CMOS 555, SOIC-8)

- Texas Instruments LMC555 in other grades/packages (e.g., industrial-temp options)

- STMicroelectronics TS555ID / TS555IY (CMOS 555, SO-8)

- onsemi NA555D or SA555D (bipolar 555, SOIC-8; higher drive, higher power)

- Renesas (Intersil) ICM7555D (CMOS 555, SOIC-8)

- Nexperia/Philips SA555D (bipolar 555, SOIC-8)

If you need a fully vetted cross-reference for drop-in use, please contact our sales team via the Y-IC website for the latest compatibility guidance.

Key Application Areas

One-shot pulse generators and debouncing

RC time delays and watchdog timers

Astable oscillators and clock sources

PWM for LED dimming and motor control

Tone generators, beepers, and modulators

Pulse stretching, missing-pulse detection, and wave shaping

LED flashers, blinkers, and simple light controllers

Educational kits, prototypes, and lab instruments

Datasheet

Our website hosts the most authoritative, up-to-date datasheet for LMC555CM/NOPB. Download it on this page to get exact limits, timing formulas, design curves, and proven application circuits.

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