FT61F020-URT from FMD Fremont Micro Devices, in a SOT-23-6. 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	PA1/AN1/C1IN-/ISPDAT	bidirectional	PORTA bit 1 general-purpose digital I/O with weak pull-up. Alternate functions: ADC analog input channel AN1, comparator 1 inverting input C1IN-, and ISP programming data line (ISPDAT). Source/sink capability 30 mA / 23 mA at VDD=5 V.
2	GND	power_in	Device ground reference (0 V). Common return for VDD, all I/O drivers, ADC and comparator analog blocks.
3	PC1/AN5/C2IN-/P1E/INT	bidirectional	PORTC bit 1 general-purpose digital I/O with weak pull-up/pull-down. Alternate functions: ADC channel AN5, comparator 2 inverting input C2IN-, ECCP enhanced-PWM output P1E, and external edge interrupt input INT. Source/sink 30 mA / 23 mA at VDD=5 V.
4	PA6/OSC2/T1G/CLKO	bidirectional	PORTA bit 6 general-purpose digital I/O with weak pull-up. Alternate functions: crystal/resonator output OSC2 (LP/XT mode), Timer1 gate input T1G, and system-clock output CLKO. Source/sink 30 mA / 23 mA at VDD=5 V.
5	VDD	power_in	Positive supply input. Operating range 2.0 V (VPOR) to 5.5 V; POR auto-adjusts down to 1.7 V once running. Bypass with local decoupling to GND.
6	PA0/AN0/C1IN+/ISPCLK	bidirectional	PORTA bit 0 general-purpose digital I/O with weak pull-up. Alternate functions: ADC channel AN0, comparator 1 non-inverting input C1IN+, and ISP programming clock (ISPCLK). Source/sink 30 mA / 23 mA at VDD=5 V.

Key specifications

Parameter	Value
Manufacturer	FMD Fremont Micro Devices
Package	SOT-23-6
Category	MCU
Pins	6

Ordering variants

Same part, different packaging or reel option.

FT61F020-URT
FT61F020-URB
FT61F020-UGT
FT61F020-UGB
FT61F021A-RB
FT61F021A-RT
FT61F021B-RB
FT61F021B-RT
FT61F021A-DRB
FT61F021A-DRT
FT61F021B-DRB
FT61F021B-DRT
FT61F02F-MRB
FT61F02F-MRT
FT61F02FA-MRB
FT61F02FA-MRT
FT61F022A-RB
FT61F022A-RT
FT61F022B-RB
FT61F022B-RT
FT61F022A-DRB
FT61F022A-DRT
FT61F023-RB
FT61F023-RT
FT61F023-DRB
FT61F023-DRT

CAD (KiCad official)

Symbol: FT61F020-URT
Footprint: Package_TO_SOT_SMD:SOT-23-6
3D model: SOT-23-6 (KiCad packages3D, STEP)

3D model downloads

Two STEP files. Same geometry, different body top:

File	Size	Use it when
`ft61f020-urt.step`	97 KB	You want the bare part, or you mark your own boards.
`ft61f020-urt-etched.step`	2.1 MB	You want the part with `FT61F020-URT` already on it.

The marking in the etched file is real recessed geometry cut into the solid, not a texture or a decal: 523 faces against 117 in the bare model. It survives export, section views, and rendering in any CAD tool, and it drops straight into KiCad or Fusion with no extra setup.

Provenance

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

Datasheet: FMD Fremont Micro Devices datasheet (115 pp, sha256 c673e26d7cd0b941, retrieved 2026-08-17, tier: lcsc)
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