component
LM555CMM
Public Made by Adomby adom
Texas Instruments Timers / Counters, MSOP-8. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.
3D Model
Open in new tab ↗
Loads on click. Unloads only if this page sits in the background.
Symbol & Footprint
Schematic Symbol
Open full view ↗Loads on click. Unloads only if this page sits in the background.
PCB Footprint
Open full view ↗Loads on click. Unloads only if this page sits in the background.
Datasheet
Open in new tab ↗Loads on click. Unloads only if this page sits in the background.
README
markdownLM555CMM
Texas Instruments · Timers / Counters · MSOP-8
LM555CMM from Texas Instruments, in a MSOP-8. Pinout and pin descriptions extracted from the manufacturer datasheet (extract_pins, cross-checked by a second model); symbol, footprint, and 3D from KiCad-official CAD.
Pinout
| Pin | Name | Type | Function |
|---|---|---|---|
| 1 | GND | power_in | Ground reference voltage |
| 2 | TRIGGER | input | Trigger input setting flip-flop transition based on external pulse amplitude below 1/3 Vcc |
| 3 | OUTPUT | output | Output driven waveform from the output stage |
| 4 | RESET | input | Reset input accepting negative pulse to disable or reset the timer; should connect to VCC when unused |
| 5 | CONTROL VOLTAGE | input | Control voltage input determining threshold and trigger levels and pulse width; external voltage can modulate output waveform |
| 6 | THRESHOLD | input | Threshold input comparing applied voltage with 2/3 Vcc reference to control flip-flop set state |
| 7 | DISCHARGE | output | Open-collector discharge output that toggles low when capacitor voltage reaches 2/3 of supply voltage |
| 8 | V+ | power_in | Supply voltage with respect to GND |
Key specifications
| Parameter | Value |
|---|---|
| Manufacturer | Texas Instruments |
| Package | MSOP-8 |
| Category | Clock/Timing |
| Pins | 8 |
CAD (KiCad official)
- Symbol:
LM555CMM - Footprint:
Package_SO:MSOP-8_3x3mm_P0.65mm - 3D model: MSOP-8 (KiCad packages3D, STEP)
- 3D model files:
lm555cmm-etched.step/lm555cmm-etched.glbcarry the MPN laser-etched on the die in a toggleableAdom.LaserEtchgroup (Fusion-ready);lm555cmm.step/lm555cmm.glbare the bare package body.
Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- Datasheet: Texas Instruments datasheet (29 pp, sha256
0bb44c3df8e5254b, retrieved 2026-09-24, tier: lcsc) - Extractor: parts-factory
2.0.0/extract_pins 0.2, primaryclaude-haiku-4-5-20251001(text), consensusclaude-sonnet-5(agreed), guards: pin_guards 0.1: passed. Pins are checked against the footprint pad set and their cited datasheet pages before publish. - CAD: KiCad official libraries (CC-BY-SA 4.0).