MAX9813HEKA+T from Maxim Integrated, in a SOT-23-8. 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	OUT	output	Rail-to-rail amplifier output that typically swings to within 100mV of the rails when driving 10kΩ and goes high-impedance in shutdown.
2	GND	power_in	Ground reference; all voltages are referenced to GND.
3	SHDN	input	Active-low shutdown input: connect to VCC for normal operation and to GND for shutdown, and do not leave unconnected because it is a high-impedance input.
4	IN1/IN2	input	Input selector: driving high selects IN1 and driving low selects IN2, with logic high ≥2V and logic low ≤0.8V.
5	IN2	input	Amplifier input 2 of the dual-input device, with a typical input impedance of 85kΩ.
6	IN1	input	Amplifier input 1 of the dual-input device, with a typical input impedance of 85kΩ.
7	BIAS	power_out	Low-noise microphone bias output regulated to 2.3V for the L version and 4V for the H version, sourcing up to 2mA in the dual-input version.
8	VCC	power_in	Positive supply, 4.5V to 5.5V for the H version (2.7V to 3.6V for the L version), to be bypassed to GND with a 0.1µF capacitor.

Key specifications

Parameter	Value
Manufacturer	Maxim Integrated
Package	SOT-23-8
Category	Amplifiers
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 Range	VCC	4.5		5.5	V	MAX9812H/MAX9813H; inferred from PSRR test	2
Supply Current	ICC		230	400	µA	IBIAS = 0A	2
Shutdown Supply Current	ICC_SHDN		0.1	1	µA	SHDN = GND	2
Amplifier Output Bias Voltage	VOUT_DC	2.25	2.5	2.75	V	MAX9812H/MAX9813H	2
Voltage Gain	AV	19	20	21	dB		2
Power-Supply Rejection Ratio	PSRROUT	90	100		dB	DC, input referred, TA = +25°C	2
Output Voltage Swing Low	VOL			0.1	V	RL = 10kΩ to VCC/2	2
Output Voltage Swing Low	VOL			0.25	V	RL = 1kΩ to VCC/2	2
Output Short-Circuit Current	IOUT_SC	3	12	24	mA	Sinking or sourcing	2
Bias Output Voltage Range	VBIAS	3.6	4	4.4	V	MAX9812H/MAX9813H	3
Power-Supply Rejection Ratio (VCC to BIAS)	PSRRBIAS	70	80		dB	DC, TA = +25°C	3
BIAS Current Limit	IBIAS_SC	5	22	50	mA	BIAS short to GND	3
Logic-Low Threshold	VIL			0.8	V		3
Logic-High Threshold	VIH	2			V		3
Logic Input Current	IIN	-1		1	µA	SHDN = GND or VCC	3
Absolute Maximum Supply Voltage	VCC	-0.3		6	V	All voltages referenced to GND	2
Continuous Current (IN, SHDN, IN1, IN2, IN1/IN2)		-20		20	mA		2
Operating Temperature Range	TA	-40		85	°C		2
Storage Temperature Range	TSTG	-65		150	°C		2
Junction Temperature	TJ			150	°C		2
Lead Temperature (soldering, 10s)				300	°C	soldering, 10s	2
Soldering Temperature (reflow)				260	°C	reflow	2

CAD (KiCad official)

Symbol: MAX9813HEKA+T
Footprint: Package_TO_SOT_SMD:SOT-23-8
3D model: SOT-23-8 (KiCad packages3D, STEP)
3D model files: max9813heka-t-etched.step / max9813heka-t-etched.glb carry the MPN laser-etched on the die in a toggleable Adom.LaserEtch group (Fusion-ready); max9813heka-t.step / max9813heka-t.glb are the bare package body.

Provenance

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

Datasheet: Maxim Integrated datasheet (10 pp, sha256 2625172de163d616, retrieved 2026-11-02, 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

MAX9813HEKA+T

Verified MAX9813HEKA+T

Verification log 1 record

3D Model

Symbol & Footprint

Schematic Symbol

PCB Footprint

Datasheet

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