INFINEON TLE 6255 G DATA SHEET

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Single Wire CAN-Transceiver

Final Data Sheet

1Features

• Single wire transceiver for up to 33 kBit/s bus speed

• Compatibel to GM LAN Standard GMW 3089 - V1.26

• Excellent EMC performance

• High speed mode for up to 100 kBit/s bus speed

• Ambient operation range

• Supply voltage operation range 5.5 V to 28 V

•Typ. 30 µA total current consumption in sleep mode

• 4 kV ESD protection

• Short circuit and overtemperature protected

• Input bilevel feature for wake-up detection

• Output bilevel feature for wake up call

• Loss of Ground protection

• Bus dominant timeout feature

• Programmable slewrate

– 40 °C to 125 °C

TLE 6255 G

P-DSO-14-8; -9

Type Ordering Code Package

TLE 6255 G Q67006-A9352 P-DSO-14-9 (SMD)

2 Description

The TLE 6255 G is a special featured low speed transceiver for use in single wire
applications.
The device is primarily designed for use in single wire CAN systems operating with
various CSMA/CR (carrier sense multiple access/collision resolution) protocols such as
the BOSCH Controller Area Network (CAN).

The normal communication bitrate in CAN-systems is up to 33 kBit/s. For software or
diagnostic data download a high speed mode is offered that allows transmission rates
up to 100 kBit/s.
With many integrated features such as slewrate controlled output, loss of ground circuit,
bi-level wake-up and sleep mode for low power consumption the TLE 6255 G is
optimized for use in automotive applications.
The device is based on Smart Power Technology SPT
control circuitry to be integrated with DMOS power devices on the same monolithic

®

which allows bipolar and CMOS

circuitry.
Additional features like short circuit and overtemperature protection, over- and
undervoltage lockout are integrated. To enhance the reliability and robustness of the
TLE 6255 G the enhanced power SO-14 package is used in order to provide high
thermal capacity and low thermal resistance.

Data Sheet Rev. 2.5 1 2003-11-27

3 Pin Configuration

(top view)

TLE 6255 G

GND

TxD

M0

M1

RxD

V

CC

GND

1

2

3

4

5

6

7

Leadframe

Chip

AEP02568

14

13

12

11

10

9

8

GND

N.C.

CANH

LOAD

V

batt

RSL

GND

Figure 1 Pin Configuration

RxD = H indicates a bus recessive state, RxD = L a bus normal or high voltage dominant
state.

Data Sheet Rev. 2.5 2 2003-11-27

TLE 6255 G

4 Pin Definitions and Functions

Pin No. Symbol Function

1, 7, 8, 14 GND Ground; internally connected to leadframe

2TxDTransceive-Input; low active, logic command to transmit

on the single wire CAN bus; inverting: TxD = low causes

CANH = dominant (high level); internal 10 kΩ pull up

3M0Mode-Input 0; to program the device operating mode;

internal pull down

4M1Mode-Input 1; to program the device operating mode;

internal pull down

5RxDReceive-Output; open drain, logic data as sensed on the

single wire CAN bus; inverting (RxD = L when CANH is
dominant)

6

9RSLSlewrate-Program-Input; an external resistor to

V

CC

Supply Voltage; input for 5 V logic supply voltage

V

CC

on

this pin is required to program the bus output slewrate

10

V

batt

Battery Supply Voltage; external blocking capacitor
necessary (see application circuit)

11 LOAD Unit-Load Resistor Input; internal termination to GND

12 CANH CAN Bus Input/Output; single wire bus input and output;

short circuit protected

13 N.C. not connected

Data Sheet Rev. 2.5 3 2003-11-27

5 Block Diagram

TLE 6255 G

CANH

LOAD

12

11

4 kV
ESD

4 kV
ESD

V

Batt

10

Protection

and

Startup-

Control

Driver

Feedback-

Loop

Load
Driver

V

CC

6

Biasing

OVLO
UVLO

Wave-

Shape-

Circuit

Input
Filter

Loss of
Ground

Control

Converter

Time Out

Circuit

Mode-Logic

M1 M0 Mode

L L Sleep

HL High-Speed
LH Wake-up Call
HH Normal

Receive

Comp

TLE 6255G

Voltage
Current

BUF

9

2

3

4

5

RSL

TxD

M0

M1

RxD

1, 7, 8, 14

GND

13

N.C.

AEB02565

Figure 2 Block Diagram

Data Sheet Rev. 2.5 4 2003-11-27

TLE 6255 G

6 Functional Description and Application Hints

6.1 Mode Control

By use of the two mode control pins M0 and M1 the transceiver can be set in the
following modes.

Table 1 Transceiver Modes

#M0M1Mode

1 Low Low Sleep mode

2 High Low High speed mode

3 Low High Wake-up call

4 High High Normal mode

Sleep-Mode

In the sleep mode the total current consumption of the TLE 6255 G is reduced to typically

30 µA. Nodes not set to sleep mode can communicate without disturbing ECUs that are

already set to sleep mode. To achieve a wake-up via the CAN bus a high voltage level
message (wake-up call) is necessary. Only high voltage level messages are reported to
the RxD pin in sleep mode. A wake-up from sleep mode of the transceiver itself has to
be done by setting the control inputs M0 and M1. If there is no modification on the mode
inputs the device remains in sleep mode after the wake-up signal is removed from the
bus.
The transceiver’s loss of ground protection circuit connection to ground is not interrupted
when in the sleep mode.

High-Speed-Mode

The high-speed mode can be used for software or diagnostic data download with bitrates
up to 100 kBit/s. Therefore the slewrate control feature is deactivated to achieve the

required timings. Further an additional external resistor of 100 Ω from CANH to GND is

necessary in this mode.

Wakeup-Call Mode

In this mode the TLE 6255 G sends the message to be transmitted as a high voltage
wake-up message.
The bus includes a special node wake up capability which allows normal communication
to take place among some nodes while leaving the other nodes in an undisturbed sleep
state. This is accomplished by controlling the level of the signal voltages such that all
nodes must wake up when they receive a higher voltage message signal waveform.
Communication at the lower, normal voltage levels shall not disturb the sleeping nodes
(

V

>9V).

batt

Data Sheet Rev. 2.5 5 2003-11-27

TLE 6255 G

Normal Mode

In the normal mode the TLE 6255 G sends a normal voltage message waveform on the
bus. It is possible to run the transceiver up to transmission rates of 33 kBits/s in this
mode.
The waveform as well as the slew rate of the rising edge (recessive to dominant
transition) are controlled by the internal active wave shaping circuit to minimize EME
(electromagnetic emission). For the same reason waveform trailing edge control is
required to assure that high frequency content is minimized at the beginning of the
downward voltage slope (dominant to recessive transition). The remaining fall time
occurs after the bus is inactive with drivers off and is determined by the RC time constant
of the total bus load.

6.2 Slew-Rate Control

The CANH output voltage and current is controlled by an internal waveshaping circuit.
For optimized adjusting of the slew rate to the system timing, the slew rate is
programmable by an external resistor connected from pin RSL to

R

the correlation of the slew rate to the resistor

RSL

.

V

. Figure 4 shows

CC

6.3 Transmitter

The TLE 6255 G contains a high current fully short circuit and overtemperature protected
highside-driver (pin CANH). To minimize spectral content the CANH-output waveform is
controlled.
Logic low (TxD = L) on pin TxD will command the output stage to switch to dominant high
potential; TxD = H to recessive low on the bus.
To avoid the bus to be blocked by a permanent dominant TxD input signal, the
TLE 6255 G incorporates a timeout feature. In case of TxD = L for longer than the
internal fixed timeout the CANH output is switched off automatically. The timeout is
resetted by a H-signal at TxD without a delay.
The loss of an ECU ground may cause the ECU to source current through the various
ECU circuits to the communications bus instead of to the vehicle system ground.
Therefore the unit-load resistor of any ECU is connected to the LOAD-pin. The
TLE 6255 G incorporates a reverse protected switch from LOAD to ground potential.
This switch is automatically switched off in a loss of ground state.

6.4 Receiver

In normal, high speed and wakeup-mode all data on the bus is sensed by the receive
comparator and transmitted to the RxD output. In sleep mode no normal level data is
detected. The receiver threshold is set to the wake-up level. So a wake-up interrupt is
sent only in case of a wake-up call on the bus. An internal fixed filter improves the EMC
susceptibility.

Data Sheet Rev. 2.5 6 2003-11-27

TLE 6255 G

6.5 Unit Load Resistor

The TLE 6255 covers the specification GMW 3089 V1.26 or the so called first generation
of SW CAN. GM decided to design a second generation of SW CAN, which is defined in
the specification GMW 3089 V2.0. This led to some differences in the electrical
characteristics(GND shift, time constants, etc.) and also in the pinout (pin 9 is used to
control a voltage regulator).

It must be pointed out, that GMW 3089 V1.26 defines a unit load resistance of:

R

= 8,999 to 9,126 kOhm

UL

With this R
of this range are not a subject to GMW 3089 V1.26!

The loss of ground circuit is not specified to function when the load resistor is out of the

8.999-9.126 kohm range!

, the TLE 6255 complies to the GMW 3089 V1.26 specification. Values out

UL

Data Sheet Rev. 2.5 7 2003-11-27