component
LMC555N
Public Made by Adomby adom
HGSEMI Timers / Counters, DIP-8. Pinout reviewed by a person 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
markdownLMC555N
HGSEMI · Timers / Counters · DIP-8
LMC555N from HGSEMI, in a DIP-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; all voltages measured relative to this pin. |
| 2 | TRIGGER | input | Trigger input; a pulse below 1/3 VCC sets the output high and starts the timing cycle; trigger current 10 pA typical at VCC=5V. |
| 3 | OUTPUT | output | Timer output; VOL max 0.4 V at IOL=3.2 mA, VOH min 4.0 V at IOH=−2 mA (VCC=5V); maximum operating frequency 500 kHz. |
| 4 | RESET | input | Active-low reset; forces output low and discharge switch on regardless of other inputs; VRES 0.4-1.2 V, IRES 10 pA typical at VCC=5V. |
| 5 | CONTROL_VOLTAGE | input | Control voltage input that overrides the internal 2/3 VCC threshold; VCTRL 3.28-3.38 V at VCC=5V; typically bypassed to GND with 10 nF when unused. |
| 6 | THRESHOLD | input | Threshold input; when voltage exceeds 2/3 VCC the output is driven low and discharge switch turns on; threshold current 10 pA typical at VCC=5V. |
| 7 | DISCHARGE | output | Open-drain discharge switch output; active (on) when output is low; saturation voltage max 400 mV at IDIS=10 mA with VCC=5V; leakage 1.0-100 nA at VCC=12V. |
| 8 | VDD | power_in | Positive supply voltage; recommended operating range 4.5 V to 15 V; supply current 30-50 µA typical at VCC=5V, 60-100 µA at VCC=10V. |
Key specifications
| Parameter | Value |
|---|---|
| Manufacturer | HGSEMI |
| Package | DIP-8 |
| Category | Clock/Timing |
| Pins | 8 |
CAD (KiCad official)
- Symbol:
LMC555N - Footprint:
Package_DIP:DIP-8_W7.62mm - 3D model: DIP-8 (KiCad packages3D, STEP)
- 3D model files:
lmc555n-etched.step/lmc555n-etched.glbcarry the MPN laser-etched on the die in a toggleableAdom.LaserEtchgroup (Fusion-ready);lmc555n.step/lmc555n.glbare the bare package body.
Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- Datasheet: HGSEMI datasheet (11 pp, sha256
1b5a397f58210605, retrieved 2026-09-29, 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:
ds2sf(Claude). Every pin and dimension is cited to a datasheet page; it refuses to fabricate. - CAD: KiCad official libraries (CC-BY-SA 4.0).