MCP2542FD-E from Microchip Tech, in a SOIC-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	TXD	input	Transmit data input: low drives CANH and CANL dominant, high leaves them recessive, with an internal pull-up of nominal 33 kΩ to VIO in this variant.
2	VSS	power_in	Ground supply pin.
3	VDD	power_in	Positive supply voltage pin that supplies the transmitter and receiver, including the wake-up receiver.
4	RXD	output	CMOS-compatible receive data output that is high when the bus is recessive and low when dominant, driven to VIO in this variant.
5	VIO	power_in	Supply for the digital I/O pins (TXD, RXD, STBY), allowing direct interface with 1.8V to 5V I/O.
6	CANL	bidirectional	CAN low-level bus pin that drives the low side of the CAN differential bus and disconnects from the bus when the device is unpowered.
7	CANH	bidirectional	CAN high-level bus pin that drives the high side of the CAN differential bus and disconnects from the bus when the device is unpowered.
8	STBY	input	Standby mode input that selects Normal or Standby mode, with an internal MOS pull-up to VIO whose typical value is 660 kΩ at 5V.

Key specifications

Parameter	Value
Manufacturer	Microchip Tech
Package	SOIC-8
Category	Interface 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
Supply voltage range, VDD pin	VDD	4.5		5.5	V		13
Digital supply voltage range, VIO pin	VIO	1.7		5.5	V		13
Specified temperature range, Extended (E)	TA	-40		125	C	Extended (E) grade	23
Operating temperature range	TA	-40		150	C		23
VDD supply voltage	VDD			7	V		12
VIO supply voltage	VIO			7	V		12
DC voltage at TXD, RXD, STBY and VSS		-0.3			V	Upper limit printed as VIO + 0.3 V	12
DC voltage at CANH and CANL		-58		58	V		12
Transient voltage on CANH and CANL (ISO-7637)		-150		100	V	Figure 2-5	12
Differential bus input voltage VDIFF(I)	VDIFF(I)	-5		10	V	t = 60 days, continuous	12
Storage temperature		-55		150	°C		12
Virtual junction temperature	TVJ	-40		190	°C	IEC 60747-1	12
ESD protection on CANH and CANL pins		-13		13	kV	IEC 61000-4-2	12
Supply current IDD, recessive	IDD		2.5	5	mA	Recessive, VTXD = VDD	13
Supply current IDD, dominant	IDD		55	70	mA	Dominant, VTXD = 0V	13
Standby current IDDS	IDDS		4	16	µA	MCP2542FD and MCP2542WFD, includes IIO	13
Maximum supply current	IDDMAX		95	140	mA	Fault condition: VTXD = VSS, VCANH = VCANL = -5V to +18V (Note 1)	13
High level of POR comparator for VDD	VPORH		3	3.95	V	Note 1: characterized, not 100% tested	13
Low level of POR comparator for VDD	VPORL	1	2	3.2	V	Note 1: characterized, not 100% tested	13
Hysteresis of POR comparator for VDD	VPORD	0.2	0.9	2	V	Note 1: characterized, not 100% tested	13
High level of UV comparator for VDD	VUVH	4	4.25	4.4	V		13
Low level of UV comparator for VDD	VUVL	3.6	3.8	4	V		13
High level of POR comparator for VIO	VPORH_VIO	0.8	1.2	1.7	V		13
CANH; CANL recessive bus output voltage	VO(R)	2		3	V	VTXD = VDD, no load	13
CANH; CANL bus output voltage in standby	VO(S)	-0.1	0	0.1	V	STBY = VTXD = VDD, no load	14
Recessive output current	IO(R)	-5		5	mA	-24V < VCAN < +24V	14
CANH dominant output voltage	VO(D)	2.75	3.5	4.5	V	TXD = 0, RL = 50 to 65	14
CANL dominant output voltage	VO(D)	0.5	1.5	2.25	V	RL = 50 to 65	14
Driver symmetry (VCANH + VCANL)/VDD	VSYM	0.9	1	1.1	V	1 MHz square wave, Recessive and Dominant states, and transition (Note 1)	14
Dominant differential output voltage	VO(DIFF)(D)	1.5	2	3	V	VTXD = VSS, RL = 50 to 65 (Note 1)	14
Dominant differential output voltage	VO(DIFF)(D)	1.4	2	3.3	V	VTXD = VSS, RL = 45 to 70 (Note 1)	14
Dominant differential output voltage	VO(DIFF)(D)	1.3	2	3.3	V	VTXD = VSS, RL = 40 to 75	14
Dominant differential output voltage	VO(DIFF)(D)	1.5		5	V	VTXD = VSS, RL = 2240	14
Recessive differential output voltage, normal	VO(DIFF)(R)	-500	0	50	mV	VTXD = VDD, no load, normal	14
Recessive differential output voltage, standby	VO(DIFF)(S)	-200	0	200	mV	VTXD = VDD, no load, standby	15
CANH short-circuit output current	IO(SC)	-115	-85		mA	VTXD = VSS, VCANH = -3V, CANL: floating	14
CANL short-circuit output current	IO(SC)		75	115	mA	VTXD = VSS, VCANL = +18V, CANH: floating	14
Recessive differential input voltage, normal mode	VDIFF(R)(I)	-4		0.5	V	Normal mode, -12V < V(CANH, CANL) < +12V	14
Recessive differential input voltage, standby mode	VDIFF(R)(I)	-4		0.4	V	Standby mode, -12V < V(CANH, CANL) < +12V	14
Dominant differential input voltage, normal mode	VDIFF(D)(I)	0.9		9	V	Normal mode, -12V < V(CANH, CANL) < +12V	15
Dominant differential input voltage, standby mode	VDIFF(D)(I)	1.1		9	V	Standby mode, -12V < V(CANH, CANL) < +12V	15
Differential receiver threshold, normal mode	VTH(DIFF)	0.5	0.7	0.9	V	Normal mode, -12V < V(CANH, CANL) < +12V	15
Differential receiver threshold, standby mode	VTH(DIFF)	0.4	0.7	0.9	V	Standby mode, -12V < V(CANH, CANL) < +12V	15
Differential input hysteresis	VHYS(DIFF)	30		200	mV	Normal mode, see Figure 2-6 (Note 1)	15
Differential input resistance	RDIFF	12	25	100	k	Note 1	15
CANH, CANL input leakage current	ILI	-5		5	µA	VDD = VTXD = VSTBY = 0V, for MCP2542FD and MCP2542WFD, VIO = 0V, VCANH = VCANL = 5 V	15
High-level input current	IIH	-1		1	µA		15
TXD low-level input current	IIL(TXD)	-270	-150	-30	µA		15
STBY low-level input current	IIL(STBY)	-30		-1	µA		15
Low-level output voltage (RXD)	VOL			0.4	V	IOL = 4 mA	16
Shutdown junction temperature	TJ(SD)	165	175	185	°C	-12V < V(CANH, CANL) < +12V (Note 1)	16
Shutdown temperature hysteresis	TJ(HYST)	15		30	°C	-12V < V(CANH, CANL) < +12V (Note 1)	16
Propagation delay TXD to RXD (worst case of tLOOP(R) and tLOOP(F))	tTXD-RXD		90	120	ns	Figure 2-10	18
Propagation delay, rising edge	tLOOP(R)		90	120	ns		18
Propagation delay, falling edge	tLOOP(F)		80	120	ns		18
Delay TXD low to bus dominant	tTXD-BUSON		50	85	ns	Note 1 (characterized, not 100% tested)	17
Delay TXD high to bus recessive	tTXD-BUSOFF		40	85	ns	Note 1 (characterized, not 100% tested)	17
Delay bus dominant to RXD	tBUSON-RXD		70	85	ns	Note 1 (characterized, not 100% tested)	17
Delay bus recessive to RXD	tBUSOFF-RXD		110	145	ns	Note 1 (characterized, not 100% tested)	17
Thermal resistance, junction-to-ambient, 8-lead SOIC	JA		149.5		C/W		23

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
contacts		tin	8-Lead Plastic Small Outline (SN) - Narrow, 3.90 mm (.150 In.) Body [SOIC] A A2	32

CAD (KiCad official)

Symbol: MCP2542FD-E
Footprint: Package_SO:SOIC-8_3.9x4.9mm_P1.27mm
3D model: SOIC-8 (KiCad packages3D, STEP)
3D model files: mcp2542fd-e-etched.step / mcp2542fd-e-etched.glb carry the MPN laser-etched on the die in a toggleable Adom.LaserEtch group (Fusion-ready); mcp2542fd-e.step / mcp2542fd-e.glb are the bare package body.

Provenance

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

Datasheet: Microchip Tech datasheet (44 pp, sha256 484a6f42b22dcf87, retrieved 2026-11-05, tier: lcsc)
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

MCP2542FD-E

Verified MCP2542FD-E

Verification log 1 record

3D Model

Symbol & Footprint

Schematic Symbol

PCB Footprint

Datasheet

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