tja1051 NXP Semiconductors, tja1051 Datasheet - Page 5

• Manufacturer Part Number: tja1051
• Description: High-speed Can Transceiver
• Manufacturer: NXP Semiconductors

NXP Semiconductors
TJA1051_1
Product data sheet
6.2.2 Internal biasing of TXD and S input pins
6.2.3 Undervoltage detection on pins V
6.2.4 Over-temperature protection
6.3 V
failure from driving the bus lines to a permanent dominant state (blocking all network
communications). The TXD dominant time-out timer is reset when pin TXD is set HIGH.
The TXD dominant time-out time also defines the minimum possible bit rate of 40 kbit/s.
Pin TXD has an internal pull-up to V
ensures a safe, defined state in case one or both of these pins are left floating.
Should V
and V
(zero load) until V
The output drivers are protected against over-temperature conditions. If the virtual
junction temperature exceeds the shutdown junction temperature, T
will be disabled until the virtual junction temperature falls below T
recessive again. Including the TXD condition ensures that output driver oscillations due to
temperature drift are avoided.
Two versions of the TJA1051 are available, only differing in the function of a single pin. Pin
5 is either not connected or is a V
Pin V
supply voltage (see
the I/O levels of the microcontroller. For versions of the TJA1051 without a V
input is internally connected to V
levels compatible with 5 V microcontrollers.
IO
supply pin
IO
uvd (VIO)
on the TJA1051T/3 and TJA1051TK/3 should be connected to the microcontroller
CC
or V
; see
IO
CC
Table
drop below their respective undervoltage detection levels (V
Figure
and V
Rev. 01 — 9 March 2009
6), the transceiver will switch off and disengage from the bus
IO
3). This will adjust the signal levels of pins TXD, RXD and S to
have recovered.
CC
IO
. This sets the signal levels of pins TXD, RXD and S to
supply pin.
IO
and pin S has an internal pull-down to GND. This
CC
and V
IO
High-speed CAN transceiver
j(sd)
j(sd)
and TXD becomes
, the output drivers
© NXP B.V. 2009. All rights reserved.
TJA1051
IO
pin, the V
uvd(VCC)
5 of 18
IO