The physical-layer interface between a CAN controller and the CAN bus, in SO-8, and one of the most widely used CAN transceivers. It converts the logic-level TXD/RXD of a controller (an MCP2515, or an MCU's on-chip CAN) into the differential CANH/CANL signals on the bus and back, at up to 1 Mb/s. An S (silent) pin disables the transmitter so a node can listen without driving the bus, and the device tolerates bus faults and provides good EMC. It drives a full multi-node bus and runs from a single 5 V supply. Vref outputs half-supply for reference.

Pinout

Pin	Name	Type	Function
1	TXD	input	Transmit data input from the CAN controller to the bus line drivers. LOW drives the bus to dominant, HIGH (or floating) leaves the bus recessive. Internal pull-up (~200 uA) to VCC; VIH >= 2.0 V, VIL <= 0.8 V. TXD dominant time-out (250-750 us) forces the bus back to recessive if held LOW too long.
2	GND	power_in	Device ground. All voltages in the datasheet are referenced to this pin.
3	VCC	power_in	Supply voltage, 4.75 V to 5.25 V. Typical supply current is 50 mA dominant / 5 mA recessive. Bypass with 100 nF close to the pin.
4	RXD	output	Receive data output; forwards the differential bus state to the CAN controller. LOW = dominant, HIGH = recessive. Drive capability IOH = -6 mA typ. at VRXD = 0.7*VCC, IOL = 8.5 mA typ. at VRXD = 0.45 V.
5	Vref	output	Reference voltage output at 0.5VCC (0.45VCC to 0.55*VCC) for use as a stable mid-supply reference to the CAN controller. Load current limited to +/-50 uA.
6	CANL	bidirectional	LOW-level CAN bus line. Driven toward GND (typ. 1.4 V) in the dominant state and biased to 0.5*VCC in the recessive state through internal 25 kOhm. Protected against ISO 7637 automotive transients (-200 V to +200 V) and short-circuits to +/-27 V (up to +40 V absolute max).
7	CANH	bidirectional	HIGH-level CAN bus line. Driven toward VCC (typ. 3.6 V) in the dominant state and biased to 0.5*VCC in the recessive state through internal 25 kOhm. Protected against ISO 7637 automotive transients (-200 V to +200 V) and short-circuits to +/-27 V (up to +40 V absolute max).
8	S	input	Mode select input. Tie to GND for high-speed (normal) mode; tie to VCC for silent mode (transmitter disabled, receiver still operational). Weak internal pull-down (~30 uA); if left floating the device defaults to high-speed mode, but grounding S is recommended for best EMI. VIH >= 2.0 V (silent), VIL <= 0.8 V (high-speed).

Key specifications

Parameter	Value
Type	High-speed CAN transceiver
Bus speed	up to 1 Mb/s
Bus interface	CANH / CANL (differential)
Controller interface	TXD / RXD (logic level)
Modes	high-speed / silent (S pin)
Reference	Vref (0.5 x VCC)
Supply voltage	4.75-5.25 V
Package	SO-8

Ordering variants

Same part, different packaging or reel option.

TJA1050T (SO-8)
TJA1050T/CM (SO-8, tape & reel)

CAD (KiCad official)

Symbol: TJA1050 (generated from datasheet; KiCad has no symbol)
Footprint: Package_SO:SOIC-8_3.9x4.9mm_P1.27mm
3D model: SOIC-8 (KiCad packages3D)

Provenance

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

Datasheet: NXP Semiconductors datasheet (18 pp, sha256 f95c1ffa13e4d80e, 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