ENC28J60T from Microchip Tech, in a SSOP-28-208mil. 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	VCAP	passive	2.5V output from internal regulator; requires a low-ESR capacitor, typically 10 µF (minimum 1 µF), to ground.
2	VSS	power_in	Ground reference.
3	CLKOUT	output	Programmable clock output pin with maximum current capacity of 8 mA.
4	INT	output	Interrupt output pin with maximum current capacity of 4 mA.
5	NC	unconnected	Reserved function; always leave unconnected.
6	SO	output	Data out pin for SPI interface with maximum current capacity of 4 mA.
7	SI	input	Schmitt trigger data in pin for SPI interface; 5V tolerant.
8	SCK	input	Schmitt trigger clock in pin for SPI interface; 5V tolerant, up to 20 MHz.
9	CS	input	Schmitt trigger chip select input for SPI interface; 5V tolerant with internal weak pull-up to VDD.
10	RESET	input	Active-low device Reset input, Schmitt trigger, 5V tolerant with internal weak pull-up to VDD.
11	VSSRX	power_in	Ground reference for PHY RX.
12	TPIN-	input	Differential analog signal input.
13	TPIN+	input	Differential analog signal input.
14	RBIAS	input	PHY bias current pin; must be tied to ground via a 2.32 kΩ, 1% resistor.
15	VDDTX	power_in	Positive supply for PHY TX.
16	TPOUT-	output	Differential signal output.
17	TPOUT+	output	Differential signal output.
18	VSSTX	power_in	Ground reference for PHY TX.
19	VDDRX	power_in	Positive 3.3V supply for PHY RX.
20	VDDPLL	power_in	Positive 3.3V supply for PHY PLL.
21	VSSPLL	power_in	Ground reference for PHY PLL.
22	VSSOSC	power_in	Ground reference for oscillator.
23	OSC1	input	Analog oscillator input for the 25 MHz crystal or external clock.
24	OSC2	output	Oscillator output.
25	VDDOSC	power_in	Positive 3.3V supply for oscillator.
26	LEDB	output	LEDB driver pin with maximum current capacity of 12 mA.
27	LEDA	output	LEDA driver pin with maximum current capacity of 12 mA.
28	VDD	power_in	Positive 3.3V supply.

Key specifications

Parameter	Value
Manufacturer	Microchip Tech
Package	SSOP-28-208mil
Category	Communication Interface Chip/UART/485/232
Pins	28

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	3.1	3.3	3.6	V		80
VDD Power-on Reset Voltage	VPOR			0.7	V	See Section 11.1	80
VDD Rise Rate to Ensure Internal POR	SVDD	0.05			V/ms	See Section 11.1	80
Input High Voltage SCK, CS, SI, RESET	VIH	2.25		5.5	V		80
Input High Voltage OSC1	VIH	0.7			V	Min 0.7 VDD, max VDD (value in VDD units)	80
Input Low Voltage SCK, CS, SI, RESET	VIL			1	V	Min VSS	80
Input Low Voltage OSC1	VIL			0.3	V	Max 0.3 VDD (value in VDD units); min VSS	80
Output High Voltage LEDA, LEDB	VOH	-0.7			V	Min VDD - 0.7; IOH = -12.0 mA (Note 1)	80
Output High Voltage CLKOUT	VOH	-0.7			V	Min VDD - 0.7; IOH = -8.0 mA (Note 1)	80
Output High Voltage INT, SO	VOH	-0.7			V	Min VDD - 0.7; IOH = -4.0 mA (Note 1)	80
Output Low Voltage LEDA, LEDB	VOL			0.4	V	IOL = 12.0 mA	80
Output Low Voltage CLKOUT	VOL			0.4	V	IOL = 8.0 mA	80
Output Low Voltage INT, SO	VOL			0.4	V	IOL = 4.0 mA	80
Weak Pull-up Resistance	RPU	74		173	kΩ		80
Input Leakage Current, all input pins except OSC1	IIL	-1		1	µA	CS = RESET = VDD, VSS ≤ VPIN ≤ VDD, pins in high-impedance state (Note 1)	80
Input Leakage Current, OSC1 pin	IIL	-200		200	µA	OSC1 = VDD (Note 1)	80
Operating Current, Transmitting Ethernet Packets	IDD		160	180	mA	VDD = 3.30V, FSCK = 10 MHz, SO = Open, LEDA and LEDB Open, ECON2 = 0	80
Operating Current, Active, not Transmitting	IDD		120		mA	VDD = 3.30V, LEDA and LEDB Open, ECON2 = 0	80
Standby Current (Sleep mode)	IDDS		1.2	2	mA	CS = VDD, Inputs tied to VDD or VSS, VDD = 3.3V, TA = 25°C, ECON2 = 1	80
Clock In Frequency	FOSC	25		25	MHz		81
Clock In Period	TOSC	40		40	ns		81
Duty Cycle (external clock input)	TDUTY	40		60	%		81
Clock Tolerance	Δf			50	ppm		81
RESET Pin High Time (between Reset events)	trl	2			µs		81
RESET Pin Low Time to Trigger Reset	tRSTLOW	400			ns		81
CLKOUT Pin High Time	thCLKOUT	16.5			ns	TDUTY = 50% (Note 1)	81
CLKOUT Pin Low Time	tlCLKOUT	16.5			ns	TDUTY = 50% (Note 1)	81
CLKOUT Pin Rise Time	trCLKOUT			3	ns	Measured from 0.1 VDD to 0.9 VDD, Load = 10 pF (Note 1)	81
CLKOUT Pin Fall Time	tfCLKOUT			4	ns	Measured from 0.9 VDD to 0.1 VDD, Load = 10 pF (Note 1)	81
Transformer Insertion Loss		0	0.6	1.1	dB		81
Transformer Primary Inductance		350			µH	8 mA bias	81
Transformer Isolation			1.5		kV		81
Differential to Common Mode Rejection		40			dB	0.1 to 10 MHz	81
Transformer Return Loss		-16			dB		81
CS Setup Time	TCSS	50			ns		82
CS Hold Time, ETH registers and memory buffer	TCSH	10			ns	ETH registers and memory buffer	82
CS Hold Time, MAC and MII registers	TCSH	210			ns	MAC and MII registers	82
CS Disable Time	TCSD	50			ns		82
Data Setup Time	TSU	10			ns		82
Data Hold Time	THD	10			ns		82
Output Valid from Clock Low	TV			10	ns	SO Load = 30 pF	82
Output Disable Time	TDIS			10	ns	SO Load = 30 pF	82
Storage temperature		-65		150	°C		79
Ambient temperature under bias (Industrial)		-40		85	°C	Industrial	79
Ambient temperature under bias (Commercial)		0		70	°C	Commercial	79
Voltage on VDD, VDDOSC, VDDPLL, VDDRX, VDDTX		-0.3		3.6	V	with respect to VSS	79
Voltage on RESET, CS, SCK and SI		-0.3		6	V	with respect to VSS	79
Voltage on CLKOUT, SO, OSC1, OSC2, LEDA, LEDB		-0.3			V	with respect to VSS; max is VDD + 0.3V	79
Voltage on TPIN+/- and TPOUT+/-		-0.3		5	V	with respect to VSS	79
VCAP with respect to VSS		-0.3		2.75	V	Note 1	79
ESD protection on all pins				2	kV		79
Current sourced or sunk by LEDA, LEDB				12	mA		79
Current sourced or sunk by CLKOUT				8	mA		79
Current sourced or sunk by INT and SO				4	mA		79

CAD (KiCad official)

Symbol: ENC28J60T
Footprint: Package_SO:SSOP-28_5.3x10.2mm_P0.65mm
3D model: SSOP-28-208mil (KiCad packages3D, STEP)
3D model files: enc28j60t-etched.step / enc28j60t-etched.glb carry the MPN laser-etched on the die in a toggleable Adom.LaserEtch group (Fusion-ready); enc28j60t.step / enc28j60t.glb are the bare package body.

Provenance

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

Datasheet: Microchip Tech datasheet (102 pp, sha256 b52e8531a128c759, retrieved 2026-10-30, 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

ENC28J60T

Verified ENC28J60T

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3D Model

Symbol & Footprint

Schematic Symbol

PCB Footprint

Datasheet

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