MAX6746KA16+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	MR	input	Manual-reset input, internally pulled up to VCC (12 to 28 kΩ), must be held low for at least 1 µs to assert RESET, and RESET remains asserted for the reset timeout period after MR is released.
2	SWT	input	Watchdog timeout input: a capacitor from SWT to GND sets tWD = 4.94 x 10^6 x CSWT (tWD in seconds, CSWT in farads), and connecting SWT to GND disables the watchdog timer.
3	SRT	input	Reset timeout input: a capacitor from SRT to GND sets the reset timeout period tRP = 4.94 x 10^6 x CSRT (tRP in seconds, CSRT in farads).
4	GND	power_in	Ground reference for the device.
5	WDS	input	Watchdog select input: connecting WDS to GND selects normal mode, connecting it to VCC selects extended mode that multiplies the basic watchdog timeout by 128, and a change of state on WDS clears the watchdog timer.
6	WDI	input	Watchdog input: a falling transition must occur within the selected watchdog timeout period or a reset pulse is generated (pulses as short as 300 ns are detected), and WDI must not be left floating, so a 100 kΩ resistor to GND is recommended when the watchdog is unused.
7	RESET	output	Push-pull active-low reset output that asserts when VCC or RESET IN falls below the selected threshold or when MR is pulled low, and stays low for the reset timeout period after all reset conditions clear.
8	VCC	power_in	Supply voltage input (1.2 V to 5.5 V operating range, 6.0 V absolute maximum) that also serves as the input for the fixed-threshold VCC monitor.

Key specifications

Parameter	Value
Manufacturer	Maxim Integrated
Package	SOT-23-8
Category	Power Management 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 (TA = 0°C to +125°C)	VCC	1		5.5	V	TA = 0°C to +125°C	2
Supply Voltage (TA = -40°C to 0°C)	VCC	1.2		5.5	V	TA = -40°C to 0°C	2
Supply Current	ICC		5	10	µA	VCC ≤ 5.5V	2
Supply Current	ICC		4.2	9	µA	VCC ≤ 3.3V	2
Supply Current	ICC		3.7	8	µA	VCC ≤ 2.0V	2
VCC Reset Threshold (suffix 16, Table 2)	VTH	1.544	1.575	1.607	V	TA = -40°C to +125°C	13
Reset Timeout Period	tRP	5.692	7.59	9.487	ms	CSRT = 1500pF	2
SRT Ramp Current	IRAMP	200	250	300	nA	VSRT = 0 to 1.23V; VCC = 1.6V to 5V	2
SRT Ramp Threshold	VRAMP	1.173	1.235	1.297	V	VCC = 1.6V to 5V (VRAMP rising)	2
Normal Watchdog Timeout Period (MAX6746-MAX6751)	tWD	5.692	7.59	9.487	ms	CSWT = 1500pF	3
Extended Watchdog Timeout (MAX6746-MAX6751)	tWD	728.6	971.5	1214.4	ms	CSWT = 1500pF	3
SWT Ramp Current	IRAMP	200	250	300	nA	VSWT = 0 to 1.23V, VCC = 1.6V to 5V	3
SWT Ramp Threshold	VRAMP	1.173	1.235	1.297	V	VCC = 1.6V to 5V (VRAMP rising)	3
RESET Output-Voltage Low (open-drain/push-pull, asserted)	VOL			0.3	V	VCC ≥ 1.0V, ISINK = 50µA	3
RESET Output-Voltage Low (open-drain/push-pull, asserted)	VOL			0.4	V	VCC ≥ 4.5V, ISINK = 3.2mA	3
Input Logic Low (MR, WDI, WDS)	VIL			0.8	V	VCC ≥ 4.0V	3
Input Logic High (MR, WDI, WDS)	VIH	2.4			V	VCC ≥ 4.0V	3
MR Minimum Pulse Width		1			µs		3
MR Pullup Resistance		12	20	28	kΩ	Pullup to VCC	3
WDI Minimum Pulse Width		300			ns		3
VCC Reset Threshold Hysteresis	VHYST		0.8		%		2
VCC to Reset Delay			20		µs	VCC falling from VTH + 100mV to VTH -100mV at 1mV/µs	2
Reset Timeout Period	tRP		0.506		ms	CSRT = 100pF	2
Normal Watchdog Timeout Period (MAX6746-MAX6751)	tWD		0.506		ms	CSWT = 100pF	3
Extended Watchdog Timeout (MAX6746-MAX6751)	tWD		64.77		ms	CSWT = 100pF	3
MR Glitch Rejection			100		ns		3
MR-to-RESET Delay			200		ns		3
VCC to GND	VCC	-0.3		6	V		2
SRT, SWT, WDS, MR, WDI to GND		-0.3			V		2
RESET (Push-Pull) to GND		-0.3			V		2
Input Current (All Pins)		-20		20	mA		2
Output Current (RESET)		-20		20	mA		2
Operating Temperature Range		-40		125	°C		2
Storage Temperature Range		-65		150	°C		2
Junction Temperature				150	°C		2
Lead Temperature (soldering, 10s)				300	°C	soldering, 10s	2
Soldering Temperature (reflow)				260	°C	reflow	2
Thermal Resistance, Junction-to-Ambient (four-layer board)	qJA		196		°C/W	Four-layer board	2
Thermal Resistance, Junction-to-Case (four-layer board)	qJC		70		°C/W	Four-layer board	2
Thermal Resistance, Junction-to-Case (single-layer board)	qJC		800		°C/W	Single-layer board	2

CAD (KiCad official)

Symbol: MAX6746KA16+T
Footprint: Package_TO_SOT_SMD:SOT-23-8
3D model: SOT-23-8 (KiCad packages3D, STEP)
3D model files: max6746ka16-t-etched.step / max6746ka16-t-etched.glb carry the MPN laser-etched on the die in a toggleable Adom.LaserEtch group (Fusion-ready); max6746ka16-t.step / max6746ka16-t.glb are the bare package body.

Provenance

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

Datasheet: Maxim Integrated datasheet (15 pp, sha256 144a666c7b8478b6, retrieved 2026-10-30, 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).

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MAX6746KA16+T

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