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HGC555IM

Public Made by Adom

by adom

HGSEMI Timers / Counters, SOP-8. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.

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HGC555IM

HGSEMI · Timers / Counters · SOP-8

HGC555IM from HGSEMI, in a SOP-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; all voltages are referenced to GND.
2 TRIGGER input Active-low trigger input; output goes high when TRIGGER is below 1/3 VCC, with input range -0.3 V to VCC+0.3 V.
3 OUTPUT output Timer output that can source and sink current to drive TTL/CMOS, with recommended output current up to 20 mA (100 mA absolute maximum).
4 RESET input Active-low reset input; a low level forces OUTPUT low and turns the discharge on, with input range -0.3 V to VCC+0.3 V.
5 CONTROL VOLTAGE passive Control voltage node that sets the threshold level (about 2/3 VCC) and needs no decoupling for stable operation.
6 THRESHOLD input Threshold input; output goes low when THRESHOLD exceeds 2/3 VCC, with input range -0.3 V to VCC+0.3 V.
7 DISCHARGE passive Discharge output that is ON when OUTPUT is low and OFF when OUTPUT is high, used to discharge the timing capacitor.
8 VCC power_in Positive supply, recommended 2.0 V to 18.0 V (absolute maximum 18.0 V).

Key specifications

Parameter Value
Manufacturer HGSEMI
Package SOP-8
Category Clock/Timing
Pins 8

Electrical characteristics

Limits as printed in the datasheet (page.json metadata.characteristics carries them as data).

Parameter Symbol Min Typ Max Unit Conditions Page
Supply Voltage VCC 2 18 V 3
Supply Voltage VCC 0 18 V 3
Output Current IO 20 mA 3
Output Current IO 100 mA 3
Input Voltage (VTH, VTRIG, VRST) VTH, VTRIG, VRST -0.3 V 3
Power Dissipation PD 200 mW 3
Operating Temperature TOPR -40 85 °C 3
Operating Temperature TOPR -40 85 °C 3
Storage Temperature TSTG -65 150 °C 3
Lead Temperature TSOLDER 245 °C 1 mm from case for 10 seconds 3
Threshold Voltage VTH 0.65 0.7 x VCC VCC = 5.0 V, 25±10 °C 4
Threshold Voltage VTH 0.6 0.8 x VCC VCC = 5.0 V, -20, 70 °C 4
Trigger Voltage VTRIG 0.31 0.36 x VCC VCC = 5.0 V, 25±10 °C 4
Trigger Voltage VTRIG 0.28 0.4 x VCC VCC = 5.0 V, -20, 70 °C 4
Reset Voltage VRST 0.4 1 V VCC = 2.0 V, 25±10 °C 4
Reset Voltage VRST 0.2 1.5 V VCC = 2.0 V, -20, 70 °C 4
Control Voltage VCV 0.65 0.69 x VCC 25±10 °C 4
Control Voltage VCV 0.6 0.8 x VCC -20, 70 °C 4
Output Voltage Low VOL 0.4 V IOL = 3.2 mA, VCC = 5.0 V, 25±10 °C 4
Output Voltage Low VOL 1 V IOL = 20 mA, VCC = 15.0 V, 25±10 °C 4
Output Voltage Low VOL 0.6 V IOL = 3.2 mA, VCC = 5.0 V, -20, 70 °C 4
Output Voltage Low VOL 1.5 V IOL = 20 mA, VCC = 15.0 V, -20, 70 °C 4
Output Voltage High VOH 4 V IOH = -0.8 mA, VCC = 5.0 V, 25±10 °C 4
Output Voltage High VOH 14.3 V IOH = -0.8 mA, VCC = 15.0 V, 25±10 °C 4
Output Voltage High VOH 3.5 V IOH = -0.8 mA, VCC = 5.0 V, -20, 70 °C 4
Output Voltage High VOH 14 V IOH = -0.8 mA, VCC = 15.0 V, -20, 70 °C 4
Supply Current ICC 200 µA VCC = 2.0 V, 25±10 °C 4
Supply Current ICC 300 µA VCC = 18.0 V, 25±10 °C 4
Supply Current ICC 400 µA VCC = 2.0 V, -20, 70 °C 4
Supply Current ICC 600 µA VCC = 18.0 V, -20, 70 °C 4
Rise (Fall) Time of Output tTHL, tTLH 35 75 ns RL = 10 M, CL = 10 pF, VCC = 5.0 V, 25±10 °C 5
Rise (Fall) Time of Output tTHL, tTLH 70 150 ns RL = 10 M, CL = 10 pF, VCC = 5.0 V, -20, 70 °C 5
Guaranteed Max Oscillator Frequency, astable fMAX 500 kHz Astable operation, VCC = 2.0-18.0 V, 25±10 °C 5
Guaranteed Max Oscillator Frequency, astable fMAX 200 kHz Astable operation, VCC = 2.0-18.0 V, -20, 70 °C 5
Initial accuracy 5 % RL = 1-100 k, CL = 0.1 µF, VCC = 5 V 5
Drift with Temperature f 0.02 %/°C VCC = 5.0 V, -20, 70 °C 5
Drift with Temperature f 0.03 %/°C VCC = 10.0 V, -20, 70 °C 5
Drift with Temperature f 0.06 %/°C VCC = 15.0 V, -20, 70 °C 5
Drift with Supply Voltage f 3 %/V VCC = 5.0 V, 25±10 °C 5
Drift with Supply Voltage f 6 %/V VCC = 5.0 V, -20, 70 °C 5

CAD (KiCad official)

  • Symbol: HGC555IM
  • Footprint: Package_SO:SOIC-8_3.9x4.9mm_P1.27mm
  • 3D model: SOP-8 (KiCad packages3D, STEP)
  • 3D model files: hgc555im-etched.step / hgc555im-etched.glb carry the MPN laser-etched on the die in a toggleable Adom.LaserEtch group (Fusion-ready); hgc555im.step / hgc555im.glb are the bare package body.

Provenance

Data extracted from the manufacturer datasheet, not a distributor listing:

  • Datasheet: HGSEMI datasheet (9 pp, sha256 7d27a57bcd8b37f6, retrieved 2026-10-18, tier: lcsc)
  • Extractor: parts-factory 2.0.0 / extract_pins 0.3, primary claude-sonnet-5-5 (text+vision), consensus claude-opus-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).

Datasheet PDF