TJA1021T/20/C,112 NXP Semiconductors, TJA1021T/20/C,112 Datasheet - Page 5

• Manufacturer Part Number: TJA1021T/20/C,112
• Description: IC TXRX LIN 2.1/SAE J2602 8-SOIC
• Manufacturer: NXP Semiconductors
• Type: Transceiverr

Specifications of TJA1021T/20/C,112

• Number Of Drivers/receivers: 1/1
• Protocol: LIN
• Voltage - Supply: 5.5 V ~ 27 V
• Mounting Type: Surface Mount
• Package / Case: 8-SOIC (3.9mm Width)
• Dc: 09+
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Other names: 935285394112; TJA1021T/20/C; TJA1021T/20/C

NXP Semiconductors
7. Functional description
TJA1021
Product data sheet
7.1 Operating modes
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.
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).
state diagram.
Fig 3.
switching on V
TERM.: slave termination resistor, connected between pins LIN and V
State diagram
BAT
TXD: weak pull-down
TERM. = high ohmic
All information provided in this document is subject to legal disclaimers.
TXD: weak pull-down
Transmitter: off
RXD: floating
INH: floating
TERM. = 30 kΩ
Transmitter: off
RXD: floating
Power-on
Sleep
INH: high
Rev. 7 — 25 March 2011
t
(SLP_N = 1)
> t
gotonorm
t
(WAKE_N = 0; after 1→0)
or t
t
(SLP_N = 1)
(LIN = 0→1; after LIN = 0)
t
(SLP_N = 0)
> t
gotonorm
> t
> t
RXD: receive data output
TXD: transmit data input
gotosleep
WAKE_N
> t
LIN 2.1/SAE J2602 transceiver
TERM. = 30 kΩ
Transmitter: on
BUS
INH: high
Normal
BAT
TXD: wake source output
.
t
(SLP_N = 1)
Figure 3
TERM. = 30 kΩ
Transmitter: off
TJA1021
© NXP B.V. 2011. All rights reserved.
Standby
INH: high
RXD: low
> t
gotonorm
shows the
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