TS391AG-AF5-R from UTC Unisonic Tech, in a SOT-25-5. Pinout and pin descriptions extracted from the manufacturer datasheet by ds2sf; symbol, footprint, and 3D from KiCad-official CAD.

Pinout

Pin	Name	Type	Function
1	IN(+)	input	Non-inverting comparator input. Input common-mode range includes ground and extends up to VCC-1.5V; may go to +30V without damage. Input bias current is typ. 25 nA (out of the pin due to PNP input stage).
2	GND	power_in	Device ground / negative supply reference. In single-supply operation, tie to 0V; in dual-supply operation, tie to the negative rail (down to -18V).
3	IN(-)	input	Inverting comparator input. Same common-mode constraints as IN(+); differential input voltage range equals the supply voltage (up to ±36V).
4	Output	output	Open-collector comparator output. Requires an external pull-up resistor to VCC (or another logic rail up to +36V). Low-level output voltage is typ. 250 mV at IOUT=4 mA; sink capability is typ. 16 mA. Compatible with TTL, DTL, ECL and CMOS.
5	VCC	power_in	Positive supply pin. Single-supply range +2V to +36V, or ±1V to ±18V split supply. Supply current is typ. 0.2 mA at VCC=5V and independent of supply voltage.

Key specifications

Parameter	Value
Manufacturer	UTC Unisonic Tech
Package	SOT-25-5
Category	Op-amp/Cmp
Pins	5

Ordering variants

Same part, different packaging or reel option.

TS391AG-AF5-R
TS391AG-AL5-R

CAD (KiCad official)

Symbol: TS391AG-AF5-R
Footprint: Package_TO_SOT_SMD:SOT-23-5
3D model: SOT-25-5 (KiCad packages3D, STEP)

Provenance

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

Datasheet: UTC Unisonic Tech datasheet (6 pp, sha256 148a7cf2cdeb20cf, retrieved 2026-08-17, tier: manufacturer)
Extractor: ds2sf (Claude). Every pin and dimension is cited to a datasheet page; it refuses to fabricate.
CAD: KiCad official libraries (CC-BY-SA 4.0).

Datasheet PDF