Datasheet > TJA1021T20

TJA1021T20

更新时间： 2024-11-08 12:15:43

品牌	Logo	应用领域
恩智浦 - NXP		/
页数	文件大小	规格书
25页	564K
描述
LIN 2.1/SAE J2602 transceiver

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TJA1021T20 数据手册

TJA1021

LIN 2.1/SAE J2602 transceiver

Rev. 6 — 30 December 2010

Product data sheet

1. General description

The TJA1021 is the interface between the Local Interconnect Network (LIN) master/slave

protocol controller and the physical bus in a LIN. It is primarily intended for in-vehicle

sub-networks using baud rates from 1 kBd up to 20 kBd and is LIN 2.1/SAE J2602

compliant. The TJA1021 is pin-to-pin compatible with the TJA1020 with an improved

ElectroStatic Discharge (ESD) specification.

The transmit data stream of the protocol controller at the transmit data input (TXD) is

converted by the TJA1021 into a bus signal with optimized slew rate and wave shaping to

minimize ElectroMagnetic Emission (EME). The LIN bus output pin is pulled HIGH via an

internal termination resistor. For a master application, an external resistor in series with a

diode should be connected between pin INH or pin V_BATand pin LIN. The receiver detects

the data stream at the LIN bus input pin and transfers it via pin RXD to the microcontroller.

In Sleep mode, the power consumption of the TJA1021 is very low. In failure modes, the

power consumption is reduced to a minimum.

2. Features and benefits

2.1 General

 LIN 2.1/SAE J2602 compliant

 Baud rate up to 20 kBd

 Very low ElectroMagnetic Emission (EME)

 High ElectroMagnetic Immunity (EMI)

 Passive behavior in unpowered state

 Input levels compatible with 3.3 V and 5 V devices

 Integrated termination resistor for LIN slave applications

 Wake-up source recognition (local or remote)

 Supports K-line like functions

 Pin-to-pin compatible with TJA1020

2.2 Low power management

 Very low current consumption in Sleep mode with local and remote wake-up

2.3 Protection mechanisms

 High ESD robustness: 6 kV according to IEC 61000-4-2 for pins LIN, V_BATand

WAKE_N

 Transmit data (TXD) dominant time-out function

12 3 4 5 6 7...25

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