HCS300-I from Microchip Tech, 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	S0	input	Switch input 0 for button 0; the button inputs have internal pull-down resistors.
2	S1	input	Switch input 1 for button 1 of the four button inputs.
3	S2	input	Switch input 2 for button 2; this pin is also the clock pin in Programming mode.
4	S3	input	Switch input 3 for button 3 of the four button inputs.
5	VSS	power_in	Ground reference for the device.
6	PWM	bidirectional	Pulse Width Modulation (PWM) output pin, which is also the data pin for Programming mode.
7	LED	output	Cathode connection for the LED, with current limiting on the LED output.
8	VDD	power_in	Positive supply voltage; the device operates from 2.0V to 6.3V per the features list.

Key specifications

Parameter	Value
Manufacturer	Microchip Tech
Package	SOP-8
Category	Interface ICs
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	VDD	-0.3		6.6	V		21
Input voltage	VIN	-0.3			V	Max printed as VDD + 0.3 V	21
Output voltage	VOUT	-0.3			V	Max printed as VDD + 0.3 V	21
Max output current	IOUT			50	mA		21
Storage temperature	TSTG	-55		125	°C		21
Lead soldering temperature	TLSOL			300	°C		21
ESD rating	VESD			4000	V		21
Operating current (avg)	ICC		0.2	1	mA	VDD = 3.0V	21
Operating current (avg)	ICC		1	2.5	mA	VDD = 6.3V	21
Standby current	ICCS		0.1	1	μA		21
Auto-shutoff current (excludes input pull-down current)	ICCS		40	75	μA	2.0V < VDD < 3.0V	21
Auto-shutoff current (excludes input pull-down current)	ICCS		160	650	μA	3.0V < VDD < 6.3V	21
Low level input voltage	VIL	-0.3			V	Max printed as 0.15VDD	21
LED sink current	ILED	1	1.8	2.5	mA	VLED = 1.5V, VDD = 3.0V	21
LED sink current	ILED	2	2.7	3.7	mA	VLED = 1.5V, VDD = 6.3V	21
Pull-down resistance S0-S3	RS0-3	40	60	80	kΩ	VDD = 4.0V	21
Pull-down resistance PWM	RPWM	80	120	160	kΩ	VDD = 4.0V	21
Time to second button press	TBP	10		26	ms	Plus Code Word time (Note 1); VDD = +3.5 to 13.0V	22
Transmit delay from button detect	TTD	10		26	ms	VDD = +3.5 to 13.0V	22
Debounce delay	TDB	6		15	ms	VDD = +3.5 to 13.0V	22
Auto-shutoff time-out period	TTO	20		120	s	VDD = +3.5 to 13.0V	22
Operating supply voltage	VDD	2		6.3	V	Listed in features as 2.0V - 6.3V operation	1
Industrial operating ambient temperature	Tamb	-40		85	°C	Industrial (I) grade, as in Table 9-2 header	21

Materials and finish

As the datasheet states them (page.json metadata.appearance; the 3D model's colours follow it).

Part	Material	Colour / plating	Datasheet says	Page
contacts		tin	Package: P = Plastic DIP (300 mil Body), 8-lead SN = Plastic SOIC (150 mil Body), 8-lead	33

CAD (KiCad official)

Symbol: HCS300-I
Footprint: Package_SO:SOIC-8_3.9x4.9mm_P1.27mm
3D model: SOP-8 (KiCad packages3D, STEP)
3D model files: hcs300-i-etched.step / hcs300-i-etched.glb carry the MPN laser-etched on the die in a toggleable Adom.LaserEtch group (Fusion-ready); hcs300-i.step / hcs300-i.glb are the bare package body.

Provenance

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

Datasheet: Microchip Tech datasheet (36 pp, sha256 f6b32ff4683041ac, retrieved 2026-10-31, tier: manufacturer)
Extractor: parts-factory 2.0.0 / extract_pins 0.3, primary claude-haiku-5-5 (text), consensus claude-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).

Datasheet PDF

HCS300-I

Verified HCS300-I

Verification log 1 record

3D Model

Symbol & Footprint

Schematic Symbol

PCB Footprint

Datasheet

README