INFINEON TLE 6254-3 G User Manual

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Data Sheet, Rev. 2.0, March 2005

TLE 6254-3 G

Fault Tolerant Low Speed CAN­Transceiver

Automotive Power

Never stop thinking.

Edition 2005-03-24
Published by Infineon Technologies AG,

St.-Martin-Strasse 53,
81669 München, Germany

© Infineon Technologies AG 2005.

All Rights Reserved.

Attention please!

The information herein is given to descr ibe certain components and shall not be considered as a guarantee of
characteristics.

Terms of delivery and rights to technical change reserved.
We hereby disclaim any and all warranties, including but not limited to warranties of non-infringement, regarding

circuits, descriptions and charts stated herein.

Information

For further information on tech nology, delivery terms and conditions and prices please contact your nearest
Infineon Technologies Office (w ww.infineon.com).

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question please contact your neares t Infineon Technologies Office.

Infineon Technologies Components may only be used in life-support devices or systems with the express written
approval of Infineon T echnologies, if a f ailure of such components can reasonably be expected to cause the failure
of that lif e -su pp o rt de vi ce o r system, or to aff ec t th e sa fety or effectiveness of th a t d evice or system. L i fe support
devices or systems are inten ded to be implante d in the human bod y, or to support and/or maintain and sustain
and/or protect human life. If they fail, it is reasonable to assume that the health of the user or other persons may
be endangered.

Fault Tolerant Low Speed CAN-Transceiver

TLE 6254-3 G

Features

• Data transmission rate up to 125 kBaud

• Low current consumption in stand-by and sleep
operation mode, including BUS wake-up

• Implemented receive-only mode

• Optimized EMC behavior

• Wake-up input pin, dual edge sensitive

• Battery fail flag

• Extended bus failure management to guarantee safe
operation during all bus line failure events

• Support of failure conditions (ISO11898-3)

• Fully wake-up capability during all bus line failures conditions

• Supports one-wire transmission mode with ground offset voltages up to 1.5 V

• Prevention from bus occupation in case of CAN controller failure

• Thermal protection

• Bus line error protection against transients in automotive environment

P-DSO-14-13, -19

Description

The CAN-Transceiver TLE 6 254-3 G wo rks as the interface b etween the CAN proto col
controller and the physical CAN bus-lines.

It is optimized for low-speed data transmission (up to 125 kBaud) in automotive and
industrial applications.

While no data is transferred, the pow er consumption c an be minimized by multiple low
power modes.

In normal operation mode a differential sig nal is transmitted/rec eived. When bus wiring
failures are detected the device automatically switches in a dedicated single-wire mode
to maintain communication.

Type Ordering Code Package

TLE 6254-3 G Q67006-A9584 P-DSO-14-19

Data Sheet 3 Rev. 2.0, 2005-03-24

TLE 6254-3 G

H

TLE 6254-3G

1IN H

TxD

RxD

NERR

NSTB

ENT

WK 8

2

3

4

5

6

7

AEP03323.VSD

14

13

12

11

10

9

Figure 1 Pin Configuration P-DSO-14-19 (top view)

Table 1 Pin Definitions and Functions
Pin No. Symbol Function

V

S

GND

CANL

CAN

V

CC

RTL

RTH

1INHInhibit output; for controlling an external voltage regulator
2TxDTransmit data input; integrated pull-up, LOW: bus

becomes dominant, HIGH: bus becomes recessive

3RxDReceive data output; integrated pull-up, LOW: bus is

dominant, HIGH: bus is recessive

4NERRError flag output; integrated pull-up, LOW: bus error (in

normal operation mode), further functions see Table 2

5NSTBNot stand-by input; digital control input to select operation

modes, see Figure 4

6ENTEnable transfer input; digital control input to select

operation modes, see Figure 4

7WKWake-Up input; if level of

V

WAKE

changes the device
indicates a wake-up from low power mode by switching the
RxD outputs LOW and switching the INH output HIGH (in
sleep mode), see Table 2

Data Sheet 4 Rev. 2.0, 2005-03-24

TLE 6254-3 G

Table 1 Pin Definitions and Functions (cont’d)
Pin No. Symbol Function

8RTHTermination resistor output; connected to CANH bus-line

via termination resistor (500 Ω <
internal failure management

9RTLTermination resistor output; connected to CANL bus-line

via termination resistor (500 Ω <
internal failure and mode management

R

< 16 kΩ), controlled by

RTH

R

< 16 kΩ), controlled by

RTL

10

V

CC

Supply voltage input; +5 V, block to GND directly at the IC
with ceramic capacitor

11 CANH CAN bus line H; HIGH: dominant state
12 CANL CAN bus line L; LOW: dominant state
13 GND Ground
14

V

S

Battery voltage supply input; block to GND directly at the
IC with ceramic capacitor

Data Sheet 5 Rev. 2.0, 2005-03-24

R

Functional Block Diagram

TLE 6254-3 G

RTL

CANH

CANL

RTH

9

11

12

8

V

CC

10

Output

Stage

V

S

14

Driver

Temp-

Protection

7.2

Mode Control

(normal, stand-by, sleep)

Time Out

B us F a ilu re

Wake-Up

V

Bat

Fail Flag

1

IN H

7

WK

6

ENT

5

NSTB

2

TxD

V

CC

4

NER

Filter

GND

13

Figure 2 Block Diagram

1.8

-2.8

3.2

7.2

Failure M anagement

M u ltip le x e r

Receiver

V

CC

3

AEA03314.VSD

RxD

Data Sheet 6 Rev. 2.0, 2005-03-24

TLE 6254-3 G

Circuit Description

The CAN transceiver TLE 6254-3 G works as the interface between the CAN protocol
controller and the physical CAN bus-lines. Figure 3 shows the principle configuration of
a CAN network.

The TLE 6254-3 G is optimized for low-speed data transmi ssion (up to 125 kBaud) in
automotive and industrial applications.

In normal operation mode a differential sig nal is transmitted/rec eived. When bus wiring
failures are detected the device automatically switches in a dedicated single-wire mode
to maintain communication.

While no data is transferred, the power consumption c an be minimized by multiple low
power operation modes. Further a receive-only mode is implemented.

To reduce radiated electroma gnetic emission (EME) the dynam ic slopes of the CANL
and CANH signals are both limited and symmetric. This allows the use of an unshielded
twisted or parallel pair of wi res for the bus. D uring single-wi re transmission (o ne of the
bus lines is affected by a bus line failure) the EME performance of the system is
degraded from the differential mode.

In case the transmission da ta inpu t TxD is permane ntly dom inant, b oth, the CANH and
CANL transmitting stage are disabl ed after a certain delay time. This is necessary to
prevent the bus from being blocked by a defective protocol unit o r short to GND at the
TxD input.

Local Area 1

Controller 1

RxD

1

Transceiver 1

TxD

1

RxD

Transceiver 2

Local Area 2

Controller 2

2

TxD

2

Bus Line

AES02410

Figure 3 CAN Network Example

Data Sheet 7 Rev. 2.0, 2005-03-24

TLE 6254-3 G

Power Down

Norm al M ode

NSTB ENT IN H

1 1 High

ENT 1ENT 0

RxD-Only

NSTB ENT IN H

1 0 High

NSTB

ENT

NSTB

V

CC

NSTB 1

1

1

0 or

Low

Start Up

Power Up

NSTB

ENT
or

V

CC

V

Stand-By

Bat

NSTB ENT IN H

0 0 High

0

0

Low

NSTB 0

NSTB 0

ENT

1

Go to

Sleep M ode

NSTB ENT INH

01High

Figure 4 State Diagram

ENT

1

ENT

t

<

t

h(min)

ENT = 1

t

>

t

h(min)

W ake-U p via
CAN-Bus
or
W K-Input;

t

>

t

WU(min)

0

or

t

>

t

WK(min)

Sleep M ode

NSTB ENT IN H

0 0 Float.

AEA03317.VSD

Data Sheet 8 Rev. 2.0, 2005-03-24