TJA1050

High speed CAN transceiver

The TJA1050 is a high speed can transceiver from NXP Semiconductors. View the full TJA1050 datasheet below including key specifications, pinout.

Official TJA1050 datasheet (PDF) — the source this page was extracted from.

Manufacturer

NXP Semiconductors

TJA1050 Key Specifications

Parameter	Value
Supply current (dominant)	75 mA (max, V TXD = 0 V)
Supply current (recessive)	10 mA (max, V TXD = V CC)
Differential bus input voltage (dominant)	1.5–3 V (V TXD = 0 V)
Propagation delay TXD to RXD	250 ns (max, V S = 0 V)
Differential receiver threshold voltage	0.5–0.9 V
TXD dominant time-out	250–750 μs (V TXD = 0 V)
Short-circuit output current (CANH)	-95 mA (max, V CANH = 0 V, V TXD = 0 V)
Short-circuit output current (CANL)	100 mA (max, V CANL = 36 V, V TXD = 0 V)

TJA1050 Overview

Part: TJA1050

Type: High speed CAN transceiver

Description: High speed CAN transceiver with very low electromagnetic emission, improved unpowered node behavior, and bus pins protected against automotive transients, supporting baud rates from 60 kbaud up to 1 Mbaud.

Operating Conditions:

Supply voltage: 4.75–5.25 V
Operating temperature: -40 to +150 °C (virtual junction temperature)
Baud rate: 60 kbaud up to 1 Mbaud

Absolute Maximum Ratings:

Max supply voltage: +6 V
Max junction/storage temperature: +150 °C

Key Specs:

Supply current (dominant): 75 mA (max, V TXD = 0 V)
Supply current (recessive): 10 mA (max, V TXD = V CC)
Differential bus input voltage (dominant): 1.5–3 V (V TXD = 0 V)
Propagation delay TXD to RXD: 250 ns (max, V S = 0 V)
Differential receiver threshold voltage: 0.5–0.9 V
TXD dominant time-out: 250–750 μs (V TXD = 0 V)
Short-circuit output current (CANH): -95 mA (max, V CANH = 0 V, V TXD = 0 V)
Short-circuit output current (CANL): 100 mA (max, V CANL = 36 V, V TXD = 0 V)

Features:

Fully compatible with the 'ISO 11898' standard
High speed (up to 1 Mbaud)
Very low ElectroMagnetic Emission (EME)
Differential receiver with wide common-mode range for high ElectroMagnetic Immunity (EMI)
An unpowered node does not disturb the bus lines
Transmit Data (TXD) dominant time-out function
Silent mode in which the transmitter is disabled
Bus pins protected against transients in an automotive environment
Input levels compatible with 3.3 V and 5 V devices
Thermally protected
Short-circuit proof to battery and to ground
At least 110 nodes can be connected.

Applications:

High-speed automotive applications
Nodes in a power-down situation in partially powered networks

Package:

SO8 (plastic small outline package; 8 leads; body width 3.9 mm)
Bare die (die dimensions 1700 · 1280 · 380 m m)

TJA1050 Features

Fully compatible with the 'ISO 11898' standard
High speed (up to 1 Mbaud)
Very low ElectroMagnetic Emission (EME)
Differential receiver with wide common-mode range for high ElectroMagnetic Immunity (EMI)
An unpowered node does not disturb the bus lines
Transmit Data (TXD) dominant time-out function
Silent mode in which the transmitter is disabled
Bus pins protected against transients in an automotive environment
Input levels compatible with 3.3 V and 5 V devices
Thermally protected
Short-circuit proof to battery and to ground
At least 110 nodes can be connected.

TJA1050 Pin Configuration

TJA1050 Pinout

Package: SO8 (SOT96-1)

Pin Number	Pin Name	Type	Description
1	TXD	I	Transmit data input; reads in data from the CAN controller to the bus line drivers
2	GND	P	Ground
3	VCC	P	Supply voltage
4	RXD	O	Receive data output; reads out data from the bus lines to the CAN controller
5	Vref	O	Reference voltage output
6	CANL	I/O	LOW-level CAN bus line
7	CANH	I/O	HIGH-level CAN bus line
8	S	I	Select input for high-speed mode or silent mode

Notes

Pin S (Mode Select): Connect to GND for high-speed mode (default); connect to VCC for silent mode (transmitter disabled). Philips recommends connecting to GND even if not used, for optimal EMI performance.
Bus Protection: CANH and CANL are protected against automotive transients per ISO 7637.
Thermal Protection: Transmitter shuts down if junction temperature exceeds ~165 °C; resets when TXD goes HIGH.
TXD Dominant Time-Out: If TXD is held LOW for >450 µs (typical), transmitter disables to prevent bus lockup.
Vref Output: Provides 0.5 VCC reference (typical 2.5 V at 5 V supply) for external biasing.

TJA1050 Thermal Information

According to IEC 60747-1.

SYMBOL	PARAMETER	CONDITIONS	VALUE	UNIT
R th(vj-a)	thermal resistance from junction to ambient in SO8 package	in free air	145	K/W
R th(vj-s)	thermal resistance from junction to substrate of bare die	in free air	50	K/W

TJA1050 Package Information

SO8: plastic small outline package; 8 leads; body width 3.9 mm

TJA1050

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