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Contents

Pinout
Key specifications
Electrical characteristics
CAD (KiCad official)
Provenance

README

markdown

HT311ARZ

HTCSEMI · Comparators · SOP-8

HT311ARZ from HTCSEMI, 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 pin, which can also be used as the output, in which case the input polarity is reversed.
2	IN+	input	Non-inverting input (the + input on the logic diagram), with a differential input voltage range of ±30V.
3	IN-	input	Inverting input (the − input on the logic diagram), with a differential input voltage range of ±30V.
4	VEE	power_in	Negative supply pin; the total supply voltage VCC + VEE is limited to 36 V maximum.
5	BALANCE	passive	Offset balance pin; if unused it is shorted to pin 6, or connected to a trim-pot with a 0.01 µF capacitor between pins 5 and 6.
6	BALANCE/STROBE	passive	Offset balance and strobe pin; do not ground it, and the strobe pin voltage is limited to VCC to VCC − 5 V.
7	OUTPUT	output	Open-collector output compatible with RTL, DTL, TTL and MOS, able to switch up to 50V at up to 50 mA and wire-OR'ed.
8	VCC	power_in	Positive supply pin, with a total supply VCC + VEE of 36 V maximum and a positive supply current of 7.5 mA maximum.

Key specifications

Parameter	Value
Manufacturer	HTCSEMI
Package	SOP-8
Category	Amplifiers/Comparators
Pins	8

Electrical characteristics

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

Parameter	Symbol	Min	Max	Unit	Conditions	Page
Total Supply Voltage (recommended)	VCC + VEE		30	V		2
Operating Temperature, All Package Types	TA	-45	85	°C		2
Total Supply Voltage	VCC + VEE		36	V		2
Output to Negative Supply Voltage	VO - VEE		40	V		2
Ground to Negative Supply Voltage	VEE		30	V		2
Input Differential Voltage	VID	-30	30	V		2
Input Voltage (Note)	VIN	-15	15	V		2
Operating Junction Temperature	TJ(max)		150	°C		2
Storage Temperature Range	Tstg	-60	150	°C		2
Input Offset Voltage	VIO		7.5	mV	RS ≤ 50 kΩ, TA = +25°C	2
Input Offset Voltage	VIO		10	mV	RS ≤ 50 kΩ, -45°C≤ TA ≤ 85°C	2
Input Offset Current	IIO		50	nA	TA = +25°C	2
Input Offset Current	IIO		100	nA	-45°C≤ TA ≤ 85°C	2
Input Bias Current	IIB		250	nA	TA = +25°C	2
Input Bias Current	IIB		375	nA	TA = -45°C	2
Input Bias Current	IIB		500	nA	TA = +85°C	2
Voltage Gain	AV	150000				2
Propagation Delay Time	tDLH		300	ns		2
Saturation Voltage	VDS		1.5	V	TA = +25°C, VID ≤ -10 mV, IO=50 mA	2
Input Voltage Range	VIR	-14.5	13	V		2
Positive Supply Current	ICC		7.5	mA		2
Negative Supply Current	IEE		-5	mA		2

CAD (KiCad official)

Symbol: HT311ARZ
Footprint: Package_SO:SOIC-8_3.9x4.9mm_P1.27mm
3D model: SOP-8 (KiCad packages3D, STEP)
3D model files: ht311arz-etched.step / ht311arz-etched.glb carry the MPN laser-etched on the die in a toggleable Adom.LaserEtch group (Fusion-ready); ht311arz.step / ht311arz.glb are the bare package body.

Provenance

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

Datasheet: HTCSEMI datasheet (20 pp, sha256 a1fca9a0fe566dad, retrieved 2026-10-20, 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