TJA1021T/20.118 NXP Semiconductors, TJA1021T/20.118 Datasheet - Page 5

• Manufacturer Part Number: TJA1021T/20.118
• Manufacturer: NXP Semiconductors

Specifications of TJA1021T/20.118

• Operating Supply Voltage (min): 5.5V
• Operating Temperature Classification: Automotive
• Mounting: Surface Mount
• Pin Count: 8
• Lead Free Status / Rohs Status: Compliant

NXP Semiconductors
Table 4.
[1]
[2]
[3]
[4]
TJA1021_5
Product data sheet
Mode
Sleep mode
Standby
mode
Normal mode
Power-on mode 0
Standby mode is entered automatically upon any local or remote wake-up event during Sleep mode. Pin INH and the 30 k termination
resistor at pin LIN are switched on.
The internal wake-up source flag (set if a local wake-up did occur and fed to pin TXD) will be reset after a positive edge on pin SLP_N.
The wake-up interrupt (on pin RXD) is released after a positive edge on pin SLP_N.
Normal mode is entered after a positive edge on SLP_N. As long as TXD is LOW, the transmitter is off. In the event of a short-circuit to
ground on pin TXD, the transmitter will be disabled.
[1]
Operating modes
SLP_N
0
0
1
Fig 3.
TXD (output)
weak pull-down
weak pull-down if
remote wake-up;
strong pull-down if
local wake-up
HIGH: recessive state
LOW: dominant state
weak pull-down
switching on V
TERM.: slave termination resistor, connected between pins LIN and V
State diagram
BAT
TXD: weak pull-down
TERM. = high ohmic
[2]
TXD: weak pull-down
Transmitter: off
RXD: floating
INH: floating
TERM. = 30 k
Transmitter: off
RXD: floating
Power-on
Sleep
INH: high
Rev. 05 — 22 October 2009
RXD
floating
LOW
HIGH: recessive state
LOW: dominant state
floating
t
(SLP_N = 1)
[3]
> 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)
INH
floating
HIGH
HIGH
HIGH
> t
gotonorm
> t
> t
RXD: receive data output
Transmitter
off
off
Normal mode
off
TXD: transmit data input
gotosleep
WAKE_N
> t
LIN 2.1/SAE J2602 transceiver
TERM. = 30 k
Transmitter: on
BUS
INH: high
Normal
BAT
TXD: wake source output
.
t
Remarks
no wake-up request
detected
wake-up request
detected; in this mode
the microcontroller
can read the wake-up
source: remote or
local wake-up
[2][3][4]
[5]
(SLP_N = 1)
TERM. = 30 k
Transmitter: off
© NXP B.V. 2009. All rights reserved.
TJA1021
Standby
INH: high
RXD: low
> t
gotonorm
001aae073
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