TJA1028T/5V0/20 NXP Semiconductors, TJA1028T/5V0/20 Datasheet - Page 5

• Manufacturer Part Number: TJA1028T/5V0/20
• Manufacturer: NXP Semiconductors

Specifications of TJA1028T/5V0/20

• Number Of Transmitters: 1
• Power Supply Requirement: Single
• Package Type: SO
• Mounting: Surface Mount
• Pin Count: 8
• Dual Supply Voltage (typ): Not RequiredV
• Dual Supply Voltage (max): Not RequiredV
• Dual Supply Voltage (min): Not RequiredV
• Lead Free Status / RoHS Status: Compliant

NXP Semiconductors
TJA1028
Product data sheet
7.1.1 Off mode
7.1.2 Standby mode
7.1 Operating modes
The TJA1028T/xxx/20 and TJA1028TK/xxx/20 versions are optimized for a speed of
20 kBd, the maximum specified in the LIN standard. The TJA1028T/xxx/10 and
TJA1028TK/xxx/10 versions are optimized for a transmission speed of 10.4 kBd, as
specified in SAE J2602.
The TJA1028 supports four operating modes: Normal, Standby, Sleep and Off. The
operating modes, and the transitions between modes, are illustrated in
The TJA1028 switches to Off mode from all other modes if the battery supply voltage
drops below the power-off detection threshold (V
exceeds the overtemperature protection activation threshold (T
The voltage regulator and the LIN physical layer are disabled in Off mode, and pin RSTN
is forced LOW.
Standby mode is a low-power mode that guarantees very low current consumption.
Fig 3.
Voltage regulator - on
Voltage regulator - off
RXD = floating
RSTN = LOW
(1) In Normal mode, the LIN transmitter is enabled - but if EN and/or RSTN go LOW, the LIN
(2) Until V
(3) If a wake-up event and a go-to-sleep event occur simultaneously, the device will switch directly to
LIN = off
V
BAT
OFF
T
transmitter will be disabled. Remote wake-up signalling will be activated.
Standby mode without initiating a reset.
State diagram
vj
< V
> T
th(det)poff
th(act)otp
CC
All information provided in this document is subject to legal disclaimers.
AII states
drops below 2 V.
V
OR
BAT
T
Rev. 2 — 25 February 2011
vj
> V
< T
th(det)pon AND
th(rel)otp
wake source)
LIN transceiver with integrated voltage regulator
(RXD signals
STANDBY
LIN = off
wake-up
remote
th(det)poff
wake-up
event
EN = 1
TXD = 1 AND
EN = 1 AND
RSTN = 1
RSTN = 1
(3)
) or the junction temperature
0 AND
th(act)otp
EN = 1
RXD = V
RSTN = LOW
).
NORMAL
TJA1028
© NXP B.V. 2011. All rights reserved.
Figure
LIN = on
LIN = off
SLEEP
EN = 1
TXD = 0 AND
015aaa086
RSTN = 1
CC
(1)
(2)
3.
0 AND
5 of 24
(3)