TJA1021TK/10 データシートの表示（PDF） - NXP Semiconductors.

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TJA1021TK/10

LIN 2.1/SAE J2602 transceiver

NXP Semiconductors. 

NXP Semiconductors

TJA1021

LIN 2.1/SAE J2602 transceiver

7. Functional description

The TJA1021 is the interface between the LIN master/slave protocol controller and the

physical bus in a Local Interconnect Network (LIN). The TJA1021 is LIN 2.1/SAE J2602

compliant and provides optimum ElectroMagnetic Compatibility (EMC) performance due

to wave shaping of the LIN output.

The TJA1021T/20 and TJA1021TK/20 are optimized for the maximum specified LIN

transmission speed of 20 kBd; theTJA1021T/10 and TJA1021TK/10 are optimized for the

LIN transmission speed of 10.4 kBd as specified by the SAE J2602.

7.1 Operating modes

The TJA1021 supports modes for normal operation (Normal mode), power-up (Power-on

mode) and very-low-power operation (Sleep mode). An intermediate wake-up mode

between Sleep and Normal modes is also supported (Standby mode). Figure 3 shows the

state diagram.

Power-on

INH: high

TERM. = 30 kΩ

RXD: floating

TXD: weak pull-down

Transmitter: off

switching on VBAT

t(SLP_N = 1) > tgotonorm

Normal

INH: high

TERM. = 30 kΩ

RXD: receive data output

TXD: transmit data input

Transmitter: on

t(SLP_N = 1) > tgotonorm

t(SLP_N = 0) > tgotosleep

t(SLP_N = 1) > tgotonorm

Sleep

INH: floating

TERM. = high ohmic

RXD: floating

TXD: weak pull-down

Transmitter: off

t(WAKE_N = 0; after 1→0) > tWAKE_N

or t(LIN = 0→1; after LIN = 0) > tBUS

Standby

INH: high

TERM. = 30 kΩ

RXD: low

TXD: wake source output

Transmitter: off

001aae073

TERM.: slave termination resistor, connected between pins LIN and VBAT.

Fig 3. State diagram

TJA1021

Product data sheet

All information provided in this document is subject to legal disclaimers.

Rev. 6 — 30 December 2010

© NXP B.V. 2010. All rights reserved.

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