component
LMC555CMM
Public Made by Adomby adom
Texas Instruments Timers / Counters, VSSOP-8-0.65mm. 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
markdownLMC555CMM
Texas Instruments · Timers / Counters · VSSOP-8-0.65mm
LMC555CMM from Texas Instruments, in a VSSOP-8-0.65mm. 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; provides the negative supply reference for the timer circuit. |
| 2 | TRIGGER | input | Trigger input; negative-going pulse converts trigger from set to reset state; timer output amplitude depends on external trigger pulse applied to this pin. |
| 3 | OUTPUT | output | Output pin that drives the timer waveform. |
| 4 | RESET | input | Reset input; negative pulse disables or resets the timer; must be connected to V+ to prevent false triggering when not used. |
| 5 | CONTROL VOLTAGE | input | Control voltage input that sets threshold and trigger levels, determines output pulse duration, and allows waveform modulation via external voltage. |
| 6 | THRESHOLD | input | Threshold input compared to 2/3 V+ reference voltage; voltage amplitude applied determines trigger set state. |
| 7 | DISCHARGE | tri_state | Open-collector output that discharges the external timing capacitor when comparator voltage reaches 2/3 of V+. |
| 8 | V+ | power_in | Positive power supply voltage input; supplies power to the timer circuit. |
Key specifications
| Parameter | Value |
|---|---|
| Manufacturer | Texas Instruments |
| Package | VSSOP-8-0.65mm |
| Category | Clock/Timing |
| Pins | 8 |
CAD (KiCad official)
- Symbol:
LMC555CMM - Footprint:
Package_SO:VSSOP-8_2.3x2mm_P0.5mm - 3D model: VSSOP-8-0.65mm (KiCad packages3D, STEP)
- 3D model files:
lmc555cmm-etched.step/lmc555cmm-etched.glbcarry the MPN laser-etched on the die in a toggleableAdom.LaserEtchgroup (Fusion-ready);lmc555cmm.step/lmc555cmm.glbare the bare package body.
Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- Datasheet: Texas Instruments datasheet (35 pp, sha256
0f7aa57c5eb1f124, retrieved 2026-09-23, tier: lcsc) - Datasheet language: Chinese. Pin names, descriptions, and specs on this page were extracted and translated to English by ds2sf; the linked PDF is the manufacturer original.
- 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).