Philips tja1050 DATASHEETS

INTEGRATED CIRCUITS
DATA SH EET
TJA1050
High speed CAN transceiver
Preliminary specification Supersedes data of 1999 Sep 27 File under Integrated Circuits, IC18
2000 May 26
Philips Semiconductors Preliminary specification
High speed CAN transceiver TJA1050

FEATURES

Fully compatible with the
“ISO 11898”
standard
High speed (up to 1 Mbaud)
Very low ElectroMagnetic Emission (EME)
Differential receiver with wide common-mode range for
high ElectroMagnetic Immunity (EMI)
An unpowered node does not disturb the bus lines
Transmit Data (TXD) dominant time-out function
Silent mode in which the transmitter is disabled
Bus pins protected against transients in an automotive
environment

GENERAL DESCRIPTION

The TJA1050 isthe interface between the Controller Area Network (CAN) protocol controller and the physical bus. The device provides differential transmit capability to the bus and differential receive capability to the CAN controller.
The TJA1050 is the successor to the PCA82C250 high-speed CAN transceiver. The most important improvements are:
Much lower electromagnetic emission due to optimal matching of the output signals CANH and CANL
Improved behaviour in case of an unpowered node.
Input levels compatible with 3.3 V devices
Thermally protected
Short-circuit proof to supply voltage and ground
At least 110 nodes can be connected.

QUICK REFERENCE DATA

SYMBOL PARAMETER CONDITIONS MIN. MAX. UNIT
V
CC
V
CANH
V
CANL
V
i(dif)(bus)
t
PD(TXD-RXD)
T
amb
supply voltage 4.75 5.25 V DC voltage at pin CANH 0 < VCC< 5.25 V; no time limit 27 +40 V DC voltage at pin CANL 0 < VCC< 5.25 V; no time limit 27 +40 V differential bus input voltage dominant 1.5 3 V propagation delay TXD to RXD VS= 0 V; see Fig.7 250 ns ambient temperature 40 +125 °C

ORDERING INFORMATION

TYPE
NUMBER
NAME DESCRIPTION VERSION
PACKAGE
TJA1050T SO8 plastic small outline package; 8 leads; body width 3.9 mm SOT96-1 TJA1050U bare die; die dimensions 1700 x 1280 x 380 µm
Philips Semiconductors Preliminary specification
High speed CAN transceiver TJA1050

BLOCK DIAGRAM

handbook, full pagewidth
TXD
RXD
V
ref
V
CC
0.5V
CC
GND
3
GND
2
7
25 k
25 k
6
MGS374
CANH
CANL
8
S
30 µA
V
CC
1
4
5
200
µA
V
CC
GND
GND
TXD
DOMINANT
TIME-OUT
TIMER
REFERENCE
VOLTAGE
TEMPERATURE
PROTECTION
DRIVER
RECEIVER
TJA1050
Fig.1 Block diagram.

PINNING

SYMBOL PIN DESCRIPTION
TXD 1 transmit data input; reads in data
from the CAN controller to the bus
line drivers GND 2 ground V
CC
3 supply voltage
RXD 4 receive data output; reads out
data from the bus lines to the
CAN controller V
ref
5 reference voltage output CANL 6 LOW-level CAN bus line CANH 7 HIGH-level CAN bus line S 8 select input for high-speed mode
or silent mode
handbook, halfpage
TXD
1 2
TJA1050T
3
V
CC
4
RXD
MGS375
Fig.2 Pin configuration.
S
8
CANHGND
7
CANL
6
V
5
ref
Philips Semiconductors Preliminary specification
High speed CAN transceiver TJA1050

FUNCTIONAL DESCRIPTION

The TJA1050 is the interface between the CAN protocol controller and the physical bus. It is primarily intended for high-speed automotive applicationsusing baud rates from 60 kbaud up to 1 Mbaud. It provides differential transmit capability to the bus and differential receiver capability to the CAN protocol controller. It is fully compatible to the
“ISO 11898”
standard.
A current-limiting circuit protects the transmitter output stage from damage caused by accidental short-circuit to either positive or negative supply voltage, although power dissipation increases during this fault condition.
A thermal protection circuit protects the IC from damage by switching off the transmitter if the junction temperature exceeds a value of approximately 165 °C. Because the transmitter dissipates most of the power, the power dissipation and temperature of the IC is reduced. All other IC functions continue to operate. The transmitter off-state resets when pin TXD goes HIGH. The thermal protection circuit is particularly needed when a bus line short-circuits.
The pins CANH and CANL are protected from automotive electrical transients (according to
“ISO 7637”
; see Fig.4).
Control pin S allows two operating modes to be selected: high-speed mode or silent mode.
Thehigh-speed mode isthe normal operating modeand is selected by connecting pin S to ground. It is the default mode if pin S is not connected.
In the silent mode, the transmitter is disabled. All other IC functions continue to operate. The silent mode is selected by connecting pin S to VCC and can be used to prevent network communication from being blocked, due to a CAN controller which is out of control.
A ‘TXD dominant time-out’ timer circuit prevents the bus linesbeing driven to apermanentdominant 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 TXDexceedsthe internal timer value, thetransmitteris disabled, driving the bus into a recessive state. The timer is reset by a positive edge on pin TXD.
Table 1 Function table of the CAN transceiver; X = don’t care
V
CC
TXD S CANH CANL BUS STATE RXD
4.75 to 5.25 V 0 0 (or floating) HIGH LOW dominant 0
4.75 to 5.25 V X 1 0.5V
4.75 to 5.25 V 1 (or floating) X 0.5V <2 V (not powered) X X 0 V < V 2V<V
< 4.75 V >2 V X 0 V < V
CC
CC
CC CANH<VCC CANH<VCC
0.5V
0.5V 0V<V 0V<V
CC
CC CANL<VCC CANL<VCC
recessive 1 recessive 1 recessive X recessive X
Philips Semiconductors Preliminary specification
High speed CAN transceiver TJA1050

LIMITING VALUES

In accordance with the Absolute Maximum Rating System (IEC 60134). All voltages are referenced to GND (pin 2). Positive currents flow into the IC.
SYMBOL PARAMETER CONDITIONS MIN. MAX. UNIT
V
CC
V
CANH
V
CANL
V
TXD
V
RXD
V
ref
V
S
V
trt(CANH)
V
trt(CANL)
V
es
T
stg
T
amb
T
vj
supply voltage 0.3 +6 V DC voltage at pin CANH 0 < VCC< 5.25 V;
27 +40 V
no time limit
DC voltage at pin CANL 0 < VCC< 5.25 V;
27 +40 V
no time limit DC voltage at pin TXD 0.3 VCC+ 0.3 V DC voltage at pin RXD 0.3 VCC+ 0.3 V DC voltage at pin V
ref
0.3 VCC+ 0.3 V DC voltage at pin S 0.3 VCC+ 0.3 V transient voltage at pin CANH note 1 200 +200 V transient voltage at pin CANL note 1 200 +200 V electrostatic discharge voltage at all pins note 2 4000 +4000 V
note 3 200 +200 V storage temperature 55 +150 °C ambient temperature 40 +125 °C virtual junction temperature note 4 40 +150 °C
Notes
1. The waveforms of the applied transients shall be in accordance with
“ISO 7637 part 1”
, test pulses 1, 2, 3a and 3b
(see Fig.4).
2. Human body model: C = 100 pF and R = 1.5 k. In case of a discharge from pin CANH to all other non-supply pins:
3750V<Ves< +3750 V.
3. Machine model: C = 200 pF, R = 10 and L = 0.75 µH. In case of a discharge from pin CANL to pin GND:
100V<Ves< +100 V; in case of a discharge from pin CANH to VCC: 150V<Ves< +150 V.
4. In accordance with
“IEC 60747-1”
. An alternative definition of Tvjis: Tvj=T
amb
+P×R
th(vj-a)
, where R
th(vj-a)
is a fixed value to be used for the calculation of Tvj. The rating for Tvjlimits the allowable combinations of power dissipation (P) and ambient temperature (T
amb
).

THERMAL CHARACTERISTICS

According to IEC 60747-1.
SYMBOL PARAMETER CONDITIONS VALUE UNIT
R
th(vj-a)
thermal resistance from junction to
in free air 145 K/W
ambient in SO8 package
R
th(vj-s)
thermal resistance from junction to
in free air 50 K/W
substrate of bare die

QUALITY SPECIFICATION

Quality specification
“SNW-FQ-611 part D”
is applicable.
Philips Semiconductors Preliminary specification
High speed CAN transceiver TJA1050

CHARACTERISTICS

VCC= 4.75 to 5.25 V; Tvj= 40 to +150 °C; RL=60Ω unless specified otherwise; all voltages are referenced to GND (pin 2); positive currents flow into the IC; see notes 1 and 2.
SYMBOL PARAMETER CONDITIONS MIN. TYP. MAX. UNIT
Supply (pin V
I
CC
)
CC
supply current dominant; V
Transmitter data input (pin TXD)
V
IH
V
IL
I
IH
I
IL
C
i
HIGH-level input voltage output recessive 2.0 VCC+ 0.3 V LOW-level input voltage output dominant 0.3 +0.8 V HIGH-level input current V LOW-level input current V input capacitance not tested 510pF
Mode select input (pin S)
V
IH
V
IL
I
IH
I
IL
HIGH-level input voltage silent mode 2.0 VCC+ 0.3 V LOW-level input voltage high-speed mode 0.3 +0.8 V HIGH-level input current VS= 2 V 20 30 50 µA LOW-level input current VS=0.8V 153045µA
Receiver data output (pin RXD)
I
OH
I
OL
HIGH-level output current V LOW-level output current V
Reference voltage output (pin V
V
ref
reference output voltage 50 µA<I
Bus lines (pins CANH and CANL)
V
o(reces)(CANH)
recessive bus voltage at pin CANH
V
o(reces)(CANL)
recessive bus voltage at pin CANL
I
o(reces)(CANH)
recessive output current at pin CANH
I
o(reces)(CANL)
recessive output current at pin CANL
V
o(dom)(CANH)
dominant output voltage at pin CANH
V
o(dom)(CANL)
dominant output voltage at pin CANL
V
i(dif)(bus)
differential bus input voltage (V
CANH
V
CANL
)
ref
=0V255075mA
TXD
recessive; V
TXD=VCC TXD
RXD RXD
TXD=VCC
=0V −100 200 300 µA
= 0.7V
CC
= 0.45 V 2 8.5 20 mA
2.5 5 10 mA
50 +A
2 6 15 mA
)
V
TXD=VCC
V
TXD=VCC
27V<V
< +50 µA 0.45V
Vref
; no load 2.0 2.5 3.0 V
; no load 2.0 2.5 3.0 V
CANH
< +32 V;
2.0 +2.5 mA
CC
0.5V
CC
0.55V
CC
V
0V<VCC< 5.25 V
27V<V
CANL
< +32 V;
2.0 +2.5 mA
0V<VCC< 5.25 V V
= 0 V 3.0 3.6 4.25 V
TXD
V
= 0 V 0.5 1.4 1.75 V
TXD
V
= 0 V; dominant;
TXD
1.5 2.25 3.0 V
42.5 < RL<60 V
TXD=VCC
; recessive;
50 0 +50 mV
no load
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