component
LM555CMMX
Public Made by Adomby adom
Texas Instruments Global Sourcing Parts, VSSOP-8-0.65mm. Pinout cross-checked by two models against the datasheet, 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
markdownLM555CMMX
Texas Instruments · Global Sourcing Parts · VSSOP-8-0.65mm
LM555CMMX from Texas Instruments, in a VSSOP-8-0.65mm. 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 | Responsible for transition of the flip-flop from set to reset; the output of the timer depends on the amplitude of the external trigger pulse applied to this pin. |
| 3 | OUTPUT | output | Output driven waveform. |
| 4 | RESET | input | Negative pulse applied to this pin to disable or reset the timer; when not used for reset purposes, it should be connected to VCC to avoid false triggering. |
| 5 | CONTROL VOLTAGE | input | Controls the threshold and trigger levels; determines the pulse width of the output waveform; an external voltage applied to this pin can also be used to modulate the output waveform. |
| 6 | THRESHOLD | input | Compares the voltage applied to the terminal with a reference voltage of 2/3 Vcc; the amplitude of voltage applied to this terminal is responsible for the set state of the flip-flop. |
| 7 | DISCHARGE | tri_state | Open collector output which discharges a capacitor between intervals (in phase with output); toggles the output from high to low when voltage reaches 2/3 of the supply voltage. |
| 8 | V+ | power_in | Supply voltage with respect to GND. |
Key specifications
| Parameter | Value |
|---|---|
| Manufacturer | Texas Instruments |
| Package | VSSOP-8-0.65mm |
| Category | Global Sourcing Parts |
| Pins | 8 |
CAD (KiCad official)
- Symbol:
LM555CMMX - Footprint:
Package_SO:VSSOP-8_2.3x2mm_P0.5mm - 3D model: VSSOP-8-0.65mm (KiCad packages3D, STEP)
- 3D model files:
lm555cmmx-etched.step/lm555cmmx-etched.glbcarry the MPN laser-etched on the die in a toggleableAdom.LaserEtchgroup (Fusion-ready);lm555cmmx.step/lm555cmmx.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 2026-10-01, tier: lcsc) - Extractor: parts-factory
2.0.0/extract_pins 0.3, primaryclaude-haiku-4-5-20251001(text), consensusclaude-sonnet-5-5(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).