component
LM555CMX
Public Made by Adomby adom
Texas Instruments Timers / Counters, SOIC-8. Datasheet-verified pinout, KiCad symbol/footprint/3D.
3D Model
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Symbol & Footprint
Schematic Symbol
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PCB Footprint
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Datasheet
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README
markdownLM555CMX
Texas Instruments · Timers / Counters · SOIC-8
LM555CMX from Texas Instruments, in a SOIC-8. Pinout and pin descriptions extracted from the manufacturer datasheet by ds2sf; symbol, footprint, and 3D from KiCad-official CAD.
Pinout
| Pin | Name | Type | Function |
|---|---|---|---|
| 1 | GND | power_in | Ground reference voltage. |
| 2 | Trigger | input | Triggers flip-flop when voltage falls below 1/3 VCC; trigger current range 0.5 to 0.9 μA. |
| 3 | Output | output | Output driven waveform capable of sourcing or sinking up to 200 mA. |
| 4 | Reset | input | Resets timer with negative pulse of 0.4 to 1 V; must connect to VCC to prevent false triggering. |
| 5 | Control Voltage | input | Controls threshold and trigger levels to determine output pulse width. |
| 6 | Threshold | input | Compares voltage with 2/3 VCC reference to set flip-flop state. |
| 7 | Discharge | tri_state | Open collector output that discharges capacitor when voltage reaches 2/3 of supply. |
| 8 | V+ | power_in | Supply voltage in range 4.5 V to 16 V; provides operating power to device. |
Key specifications
| Parameter | Value |
|---|---|
| Manufacturer | Texas Instruments |
| Package | SOIC-8 |
| Category | Clock/Timing |
| Pins | 8 |
CAD (KiCad official)
- Symbol:
LM555CMX - Footprint:
Package_SO:SOIC-8_3.9x4.9mm_P1.27mm - 3D model: SOIC-8 (KiCad packages3D, STEP)
- 3D model files:
lm555cmx-etched.step/lm555cmx-etched.glbcarry the MPN laser-etched on the die in a toggleableAdom.LaserEtchgroup (Fusion-ready);lm555cmx.step/lm555cmx.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 2026-09-22, tier: lcsc) - Extractor: parts-factory
2.0.0/extract_pins 0.2, primaryclaude-haiku-4-5-20251001(text), consensusclaude-sonnet-4-6(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).