MAX690AESA+T from Maxim Integrated, in a SO-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	VOUT	power_out	Supply output for CMOS RAM that connects to VCC through a P-channel switch when VCC is above the reset threshold, and to the higher of VCC or VBATT when VCC is below the reset threshold.
2	VCC	power_in	+5V supply input; the reset threshold for this part is 4.65V, and the device must stay within the stated supply range.
3	GND	power_in	Ground reference for the device.
4	PFI	input	Power-fail comparator input compared against an internal 1.25V reference; PFO goes low when PFI is below 1.25V, and PFI should be connected to GND or VCC when unused.
5	PFO	output	Power-fail output that goes low when PFI is less than 1.25V and otherwise stays high.
6	WDI	input	Watchdog input: if WDI remains high or low for 1.6s the watchdog times out and triggers RESET, and leaving WDI floating or three-stated disables the watchdog.
7	RESET	output	Active-low reset output that pulses low for 200ms whenever reset is triggered (power-up, brownout below the 4.65V threshold, or watchdog timeout), and stays low while VCC is below the threshold.
8	VBATT	power_in	Backup-battery input that switches to VOUT when VCC falls below the reset threshold and VBATT is 20mV greater than VCC, with 40mV hysteresis to prevent repeated switching.

Key specifications

Parameter	Value
Manufacturer	Maxim Integrated
Package	SO-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
Operating Voltage Range, VCC, VBATT	VCC, VBATT	1.2		5.5	V	MAX69_AE/M, MAX80_ _E variant (Note 2)	2
Supply Current (Excluding IOUT)	ISUPPLY		200	500	µA	MAX69_AE/M variant	2
ISUPPLY in Battery-Backup Mode (Excluding IOUT)	ISUPPLY		0.05	1	µA	VCC = 0V, VBATT = 2.8V, TA = +25°C	2
ISUPPLY in Battery-Backup Mode (Excluding IOUT)	ISUPPLY			5	µA	VCC = 0V, VBATT = 2.8V, TA = TMIN to TMAX	2
VBATT Standby Current		-0.1	0.02		µA	5.5V > VCC > VBATT +0.2V, TA = +25°C (Note 3)	2
VBATT Standby Current		-1	0.02		µA	5.5V > VCC > VBATT +0.2V, TA = TMIN to TMAX (Note 3)	2
Battery Switch Threshold, VCC to VBATT, power-up				20	mV	VCC < VRT	2
Battery Switch Threshold, VCC to VBATT, power-down		-20			mV	VCC < VRT	2
Battery Switchover Hysteresis			40		mV		2
Reset Threshold	VRT	4.5	4.65	4.75	V	MAX690A variant	2
Reset Threshold Hysteresis			40		mV		2
Reset Pulse Width	tRS	140	200	280	ms		2
RESET Output Voltage	V			0.4	V	ISINK = 3.2mA	3
RESET Output Voltage	V			0.3	V	MAX69_AE/M variant, VCC = 1.2V, ISINK = 100µA	3
Watchdog Timeout	tWD	1	1.6	2.25	s		3
WDI Pulse Width	tWP	50			ns	VIL = 0.4V, VIH = (0.8) (VCC)	3
WDI Input Threshold, logic low				0.8	V	VCC = 5V (Note 4)	3
WDI Input Threshold, logic high		3.5			V	VCC = 5V (Note 4)	3
WDI Input Current		50		150	µA	WDI = VCC	3
WDI Input Current		-150		-50	µA	WDI = 0V	3
PFI Input Threshold		1.2	1.25	1.3	V	MAX69_A variant, VCC = 5V	3
PFI Input Current		-25	0.01	25	nA		3
PFO Output Voltage	V			0.4	V	ISINK = 3.2mA	3
Terminal Voltage (with respect to GND), VCC	VCC	-0.3		6	V		2
Terminal Voltage (with respect to GND), VBATT	VBATT	-0.3		6	V		2
Terminal Voltage (with respect to GND), All Other Inputs		-0.3			V	upper limit is VCC + 0.3V (Note 1)	2
Input Current, VCC	VCC			200	mA		2
Input Current, VBATT	VBATT			50	mA		2
Input Current, GND	GND			20	mA		2
Output Current, All Other Outputs				20	mA		2
Rate of Rise, VCC, VBATT				100	V/µs		2
Operating Temperature Range, MAX69_AE		-40		85	°C	MAX69_AE__ grade	2
Storage Temperature Range		-65		160	°C		2
Lead Temperature				300	°C	soldering, 10s	2
Continuous Power Dissipation, SO				471	mW	derate 5.88mW/°C above +70°C	2

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
housing	LCP		MAX802LCPA 0°C to +70°C 8 Plastic DIP	12

CAD (KiCad official)

Symbol: MAX690AESA+T
Footprint: Package_SO:SOIC-8_3.9x4.9mm_P1.27mm
3D model: SO-8 (KiCad packages3D, STEP)
3D model files: max690aesa-t-etched.step / max690aesa-t-etched.glb carry the MPN laser-etched on the die in a toggleable Adom.LaserEtch group (Fusion-ready); max690aesa-t.step / max690aesa-t.glb are the bare package body.

Provenance

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

Datasheet: Maxim Integrated datasheet (13 pp, sha256 7dbca99620bf04f7, 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).

Datasheet PDF

MAX690AESA+T

Verified MAX690AESA+T

Verification log 1 record

3D Model

Symbol & Footprint

Schematic Symbol

PCB Footprint

Datasheet

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