參數(shù)資料
型號(hào)： TJA1020_5
廠商： NXP Semiconductors N.V.
英文描述： LIN transceiver
中文描述： LIN收發(fā)器
文件頁(yè)數(shù)： 7/24頁(yè)
文件大?。?/td> 105K
代理商： TJA1020_5
2002 Jul 17
7
Philips Semiconductors
Product specification
LIN transceiver
TJA1020
Wake-up via mode transition
It is also possible to set pin INH HIGH with a mode
transition towards normal slope/low slope mode via pin
NSLP. This is useful for applications with a continuously
powered microcontroller.
Wake-up source recognition
The TJA1020 can distinguish between a local wake-up
request on pin NWAKE and a remote wake-up request via
a dominant bus state. The wake-up source flag is set in
case the wake-up request was a local one. The wake-up
source can be read on pin TXD in the standby mode. If an
external pull-up resistor on pin TXD to the power supply
voltage of the microcontroller has been added a HIGH
level indicates a remote wake-up request (weak pull-down
at pin TXD) and a LOW level indicates a local wake-up
request (strong pull-down at pin TXD; much stronger than
the external pull-up resistor).
The wake-up request flag (signalled on pin RXD) as well
as the wake-up source flag (signalled on pin TXD) are
reset immediately, if the microcontroller sets pin NSLP
HIGH.
TXD dominant time-out function
A ‘TXD Dominant Time-out’ timer circuit prevents the bus
line from being driven to a permanent dominant state
(blocking all network communication) if pin TXD is forced
permanently LOW by a hardware and/or software
application failure. The timer is triggered by a negative
edge on pin TXD. If the duration of the LOW level on pin
TXDexceedstheinternaltimervalue(t
dom
),thetransmitter
is disabled, driving the bus line into a recessive state. The
timer is reset by a positive edge on pin TXD.
Fail-safe features
Pin TXD provides a pull-down to GND in order to force a
predefined level on input pin TXD in case the pin TXD is
unsupplied.
Pin NSLP provides a pull-down to GND in order to force
the transceiver into sleep mode in case the pin NSLP is
unsupplied.
Pin RXD is set floating in case of lost power supply on pin
BAT.
The current of the transmitter output stage is limited in
order to protect the transmitter against short-circuit to pins
BAT or GND.
A loss of power (pins BAT and GND) has no impact to the
bus line and the microcontroller. There are no reverse
currents from the bus. The LIN transceiver can be
disconnected from the power supply without influencing
the LIN bus.
The output driver at pin LIN is protected against
overtemperature conditions. If the junction temperature
exceeds the shutdown junction temperature T
j(sd)
, the
thermal protection circuit disables the output driver. The
driver is enabled again if the junction temperature has
been decreased below T
j(sd)
and a recessive level is
present at pin TXD.
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相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
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TJA1020T/N,112 功能描述:射頻收發(fā)器 LIN TRANSCEIVER RoHS:否 制造商:Atmel 頻率范圍:2322 MHz to 2527 MHz 最大數(shù)據(jù)速率:2000 Kbps 調(diào)制格式:OQPSK 輸出功率:4 dBm 類型: 工作電源電壓:1.8 V to 3.6 V 最大工作溫度:+ 85 C 接口類型:SPI 封裝 / 箱體:QFN-32 封裝:Tray
TJA1020T/N,118 功能描述:射頻收發(fā)器 LIN TRANSCEIVER RoHS:否 制造商:Atmel 頻率范圍:2322 MHz to 2527 MHz 最大數(shù)據(jù)速率:2000 Kbps 調(diào)制格式:OQPSK 輸出功率:4 dBm 類型: 工作電源電壓:1.8 V to 3.6 V 最大工作溫度:+ 85 C 接口類型:SPI 封裝 / 箱體:QFN-32 封裝:Tray
TJA1020T/N/S490,11 功能描述:射頻收發(fā)器 LIN TRANSCEIVER RoHS:否 制造商:Atmel 頻率范圍:2322 MHz to 2527 MHz 最大數(shù)據(jù)速率:2000 Kbps 調(diào)制格式:OQPSK 輸出功率:4 dBm 類型: 工作電源電壓:1.8 V to 3.6 V 最大工作溫度:+ 85 C 接口類型:SPI 封裝 / 箱體:QFN-32 封裝:Tray
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