MRF89XAT-I from Microchip Tech, in a TQFN-32-EP(5x5). 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	TEST5	bidirectional	Test pin, connected to Ground during normal operation.
2	TEST1	bidirectional	Test pin, connected to Ground during normal operation.
3	VCORS	power_out	Regulated voltage supply of the VCO (0.85V).
4	VCOTN	passive	VCO tank connection (negative side; two same-value external inductors required).
5	VCOTP	passive	VCO tank connection (positive side; two same-value external inductors required).
6	PLLN	passive	PLL loop filter connection.
7	PLLP	passive	PLL loop filter connection.
8	TEST6	bidirectional	Test pin, connected to Ground during normal operation.
9	TEST7	bidirectional	Test pin, connected to Ground during normal operation.
10	OSC1	passive	Crystal connection.
11	OSC2	passive	Crystal connection.
12	TEST0	input	Test pin, connected to Ground during normal operation.
13	TEST8	bidirectional	Test pin, allow pin to float; do not connect signal during normal operation.
14	CSCON	input	SPI configure chip select; has priority over CSDAT.
15	CSDAT	input	SPI data chip select.
16	SDO	tri_state	Serial data output from the MRF89XA; driven only when CSCON or CSDAT is low, otherwise High-Z.
17	SDI	input	Serial data input to the MRF89XA.
18	SCK	input	SPI serial clock input.
19	CLKOUT	output	Clock output at reference frequency divided by a programmable factor; disable when unused to minimize current.
20	DATA	bidirectional	NRZ data input and output in Continuous mode; if unused, pull up to VDD through 100 kΩ.
21	IRQ0	output	Interrupt request output to the host microcontroller.
22	IRQ1	output	Interrupt request output to the host microcontroller.
23	PLOCK	output	PLL lock detection output, enabled by the LENPLL bit.
24	TEST2	bidirectional	Test pin, connected to Ground during normal operation.
25	TEST3	bidirectional	Test pin, connected to Ground during normal operation.
26	VDD	power_in	Power supply input, 2.1-3.6V.
27	AVRS	power_out	Regulated supply of the analog circuitry (1.0V).
28	DVRS	power_out	Regulated supply of the digital circuitry (1.0V).
29	PARS	power_out	Regulated supply of the PA (1.8V), also output for the PA choke in Transmit mode.
30	TEST4	bidirectional	Test pin, connected to Ground during normal operation.
31	RFIO	bidirectional	RF input/output.
32	NC	unconnected	No connection; connected to Ground during normal operation.
33	Vss	power_in	Exposed pad, connected to Ground during normal operation.

Key specifications

Parameter	Value
Manufacturer	Microchip Tech
Package	TQFN-32-EP(5x5)
Category	Radio Frequency Chip/Antenna
Pins	33

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 (VDD, powers POR, SPI and configuration registers)	VDD	2.1		3.6	V	VDD pin 26, external supply, Table 2-2	14
Operating temperature range (Industrial)		-40		85	°C	I = Industrial temperature range	135

CAD (KiCad official)

Symbol: MRF89XAT-I
Footprint: Package_DFN_QFN:QFN-32-1EP_5x5mm_P0.5mm_EP3.3x3.3mm
3D model: TQFN-32-EP(5x5) (KiCad packages3D, STEP)
3D model files: mrf89xat-i-etched.step / mrf89xat-i-etched.glb carry the MPN laser-etched on the die in a toggleable Adom.LaserEtch group (Fusion-ready); mrf89xat-i.step / mrf89xat-i.glb are the bare package body.

Provenance

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

Datasheet: Microchip Tech datasheet (139 pp, sha256 c971bf0195452e73, retrieved 2026-10-31, tier: manufacturer)
Extractor: parts-factory 2.0.0 / extract_pins 0.3, primary claude-sonnet-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

MRF89XAT-I

Verified MRF89XAT-I

Verification log 1 record

3D Model

Symbol & Footprint

Schematic Symbol

PCB Footprint

Datasheet

README