component

ICM7555MM

Public Made by Adom

by adom

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

componentclock-timingicm7555mmfactory-2.0.0extractor-text
Overview Files Discover Packages Releases Dependencies Issues Breadcrumbs Pull Requests Activity
main
Download ZIP Propose a change
Generated by kicad-footprint-generator · KiCad file format 20260206
Name Last commit message Last updated
docs Publish 0.1.0 · Ray 8d ago
viewers icm7555mm: viewers · Ray 8d ago
icm7555mm-etched.glb Publish 0.1.0 · Ray 8d ago
icm7555mm-etched.step icm7555mm: factory component page (tier=lcsc) · Ray 8d ago
icm7555mm-hero.glb icm7555mm: hero GLB from the etched model (keeps the MPN mark) · Ray 8d ago
icm7555mm-hero.overlay.json Publish 0.1.0 · Ray 8d ago
icm7555mm.glb Publish 0.1.0 · Ray 8d ago
icm7555mm.kicad_mod Publish 0.1.0 · Ray 8d ago
icm7555mm.kicad_sym Publish 0.1.0 · Ray 8d ago
icm7555mm.lbr Publish 0.1.0 · Ray 8d ago
icm7555mm.step Publish 0.1.0 · Ray 8d ago
package.json Publish 0.1.0 · Ray 8d ago
page.json Set visibility: public · Ray 8d ago
README.md Publish 0.1.0 · Ray 8d ago

ICM7555MM

HGSEMI · Timers / Counters · MSOP-8

ICM7555MM from HGSEMI, in a MSOP-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 measured relative to this pin and it is the source of the internal discharge transistor.
2 TRIGGER input Trigger input; a voltage below 1/3 VCC sets the flip-flop and drives OUTPUT high, with typical input current of 20pA.
3 OUTPUT output Timer output, TTL/CMOS compatible at 5V, with VOH of 4.0V min at 5V and -2mA and VOL of 0.4V max at 3.2mA.
4 RESET input Active-low reset of the flip-flop; LOW forces OUTPUT low and turns the discharge switch on, with the reset voltage threshold typically 0.7V at VCC=5V.
5 CONTROL VOLTAGE input Control voltage input that sets the comparator threshold, typically 3.33V at VCC=5V (2/3 VCC).
6 THRESHOLD input Threshold input; a voltage above 2/3 VCC resets the flip-flop, driving OUTPUT low and turning on the discharge switch, with typical input current of 20pA.
7 DISCHARGE passive Open-drain discharge transistor output for the timing capacitor, with saturation voltage of 400mV max at 10mA and VCC=5V.
8 VDD power_in Positive supply voltage, recommended 4.5V to 15V with absolute maximum of 15V.

Key specifications

Parameter Value
Manufacturer HGSEMI
Package MSOP-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 current Is 30 50 uA VCC=5V, TA=25℃ 4
Supply current Is 60 100 uA VCC=10V, TA=25℃ 4
Supply current Is 90 150 uA VCC=15V, TA=25℃ 4
Control voltage VCTRL 3.28 3.33 3.38 V VCC=5V 4
Control voltage VCTRL 6.6 6.66 6.7 V VCC=10V 4
Control voltage VCTRL 9.95 10 10.15 V VCC=15V 4
Discharge saturation voltage VDIS 100 400 mV VCC=5V, IDIS=10mA 4
Output voltage low VOL 0.1 0.4 V VCC=5V or VCC=15V, Io=3.2mA 4
Output voltage high VOH 4 4.5 V VCC=5V, Io=-2mA 4
Output voltage high VOH 14.5 14.75 V VCC=15V, Io=-2mA 4
Trigger voltage VTRIG 1.55 1.66 1.7 V VCC=5V 4
Trigger voltage VTRIG 3.23 3.33 3.38 V VCC=10V 4
Trigger voltage VTRIG 4.95 5 5.05 V VCC=15V 4
Reset voltage VRES 0.4 0.7 1.2 V VCC=5V 4
Discharge leakage current IDIS 1 100 nA VCC=12V 4
Output rise time tR 35 40 75 ns VCC=5V, RL=10MΩ, CL=10pF 4
Output fall time tF 35 40 75 ns VCC=5V, RL=10MΩ, CL=10pF 4
Maximum frequency Fmax 500 KHz 4
Trigger current ITRIG 10 pA VCC=5V 4
Reset current IRES 10 pA VCC=5V 4
Threshold current ITHRESH 10 pA VCC=5V 4
Supply voltage Vcc 15 V 3
Operating temperature range Toper -40 85 ℃ 3
Junction temperature Tj 150 ℃ 3
Storage temperature range Tstg -50 150 ℃ 3
Lead temperature (soldering 10s) TLEAD 260 ℃ 10s soldering 3
Supply voltage Vcc 4.5 15 V TA=25℃ 3
Maximum input voltage (Vth, Vtrig, VCTRL, Vreset) Vth, Vtrig, VCTRL, Vreset -0.3 V upper limit printed as Vcc+0.3 V 3

CAD (KiCad official)

  • Symbol: ICM7555MM
  • Footprint: Package_SO:MSOP-8_3x3mm_P0.65mm
  • 3D model: MSOP-8 (KiCad packages3D, STEP)
  • 3D model files: icm7555mm-etched.step / icm7555mm-etched.glb carry the MPN laser-etched on the die in a toggleable Adom.LaserEtch group (Fusion-ready); icm7555mm.step / icm7555mm.glb are the bare package body.

Provenance

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

  • Datasheet: HGSEMI datasheet (11 pp, sha256 e95f11bad730cc7b, retrieved 2026-10-20, 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 0.3, 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