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Single Wire CAN-Transceiver Final Data Sheet
1 * * * * * * * * * * * * * * Features 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 - 40 C to 125 C Supply voltage operation range 5.5 V to 28 V Typ. 30 A 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 Ordering Code Q67006-A9352
TLE 6255 G
P-DSO-14-8; -9
Type TLE 6255 G 2 Description
Package P-DSO-14-9 (SMD)
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(R) which allows bipolar and CMOS control circuitry to be integrated with DMOS power devices on the same monolithic 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
TLE 6255 G
3
Pin Configuration (top view)
GND
1
14
GND
TxD
2
Leadframe
13
N.C.
M0
3
12
CANH
M1
4
Chip
11
LOAD
RxD
5
10
Vbatt
VCC
6
9
RSL
GND
7
8
GND
AEP02568
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
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TLE 6255 G
4 Pin No. 1, 7, 8, 14 2
Pin Definitions and Functions Symbol GND TxD Function Ground; internally connected to leadframe Transceive-Input; low active, logic command to transmit on the single wire CAN bus; inverting: TxD = low causes CANH = dominant (high level); internal 10 k pull up Mode-Input 0; to program the device operating mode; internal pull down Mode-Input 1; to program the device operating mode; internal pull down Receive-Output; open drain, logic data as sensed on the single wire CAN bus; inverting (RxD = L when CANH is dominant) Supply Voltage; input for 5 V logic supply voltage Slewrate-Program-Input; an external resistor to VCC on this pin is required to program the bus output slewrate Battery Supply Voltage; external blocking capacitor necessary (see application circuit) Unit-Load Resistor Input; internal termination to GND CAN Bus Input/Output; single wire bus input and output; short circuit protected not connected
3 4 5
M0 M1 RxD
6 9 10 11 12 13
VCC
RSL
Vbatt
LOAD CANH N.C.
Data Sheet Rev. 2.5
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TLE 6255 G
5
Block Diagram
VBatt 10 4 kV ESD Protection and StartupControl Driver
VCC 6 Biasing OVLO UVLO TLE 6255G Voltage Current Converter
9
RSL
4 kV ESD CANH 12
WaveShapeCircuit
Time Out Circuit Mode-Logic M1 M0 Mode Sleep High-Speed Wake-up Call Normal
2
TxD
3
FeedbackLoop Input Filter 11 Load Driver Loss of Ground Control
M0
L L H H
L H L H
4
M1
LOAD
BUF Receive Comp
5
RxD
1, 7, 8, 14 GND
13 N.C.
AEB02565
Figure 2
Block Diagram
Data Sheet Rev. 2.5
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2003-11-27
TLE 6255 G
6 6.1
Functional Description and Application Hints Mode Control
By use of the two mode control pins M0 and M1 the transceiver can be set in the following modes. Table 1 # 1 2 3 4 Transceiver Modes M0 Low High Low High M1 Low Low High High Mode Sleep mode High speed mode Wake-up call Normal mode
Sleep-Mode In the sleep mode the total current consumption of the TLE 6255 G is reduced to typically 30 A. 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 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 (Vbatt > 9 V).
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 VCC. Figure 4 shows the correlation of the slew rate to the resistor RRSL. 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
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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: RUL= 8,999 to 9,126 kOhm With this RUL, the TLE 6255 complies to the GMW 3089 V1.26 specification. Values out 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!
Data Sheet Rev. 2.5
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TLE 6255 G
7
Parameter
Absolute Maximum Ratings
Symbol Limit Values min. max. Unit Remarks
Voltages Supply voltage CAN bus input/output voltage Load voltage Logic supply voltage Logic voltages (VRxD; VTxD; VM0; VM1; VRSL) Currents
CAN Bus current Load current
Vbatt VCANH VLOAD VCC Vlogic
- 0.3 - 28 - 28 - 0.3 - 0.3
40 28 28 7 7
V V V V V
- - - - -
ICANH ILOAD
- -
- -
mA mA
internally limited internally limited
ESD-Protection (Human Body Model; According to MIL STD 833 D) Pin CANH, Vbatt Other pins Temperatures Junction temperature Junction temperature Junction temperature Storage temperature Thermal Resistances Junction to pin Junction ambient
VESD VESD
- 4000 - 2000
4000 2000
V V
- -
Tj Tj Tj Tstg
- 40 - - - 50
150 175 200 150
C C C C
-
t < 1000 h t < 10 h
-
Rthj-pin Rthj-a
- -
40 65
K/W K/W
junction to pin 1 -
Note: Maximum ratings are absolute ratings; exceeding any one of these values may cause irreversible damage to the integrated circuit.
Data Sheet Rev. 2.5
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TLE 6255 G
8 Parameter
Operating Range Symbol Limit Values min. max. V Unit Remarks After Vbatt rising above
Supply voltage Supply voltage increasing
Vbatt
VUVOFF 28
- 0.3 - 0.3
VUV ON
Vbatt Supply voltage decreasing Vbatt Logic supply voltage VCC VCC VCC Tj RRSL
VUV ON V VUV OFF V
V
Outputs in tristate Outputs in tristate After VCC rising above
VPOROF 5.5
- 0.3 - 0.3 - 40 35
VPORON
Logic supply voltage; increasing Logic supply voltage; decreasing Junction temperature RSL resistance Thermal Shutdown
VPORON V VPOROF V
150 200 C k
Outputs in tristate Outputs in tristate - -
Thermal shutdown junction TjSD temperature Thermal switch-on junction TjSO temperature
150 120
200 170
C C
- temperature hysteresis T = 30 K (typ.)
Data Sheet Rev. 2.5
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TLE 6255 G
9
Electrical Characteristics
5.5 V < Vbatt < 16 V; 4.75 V < VCC < 5.25 V; - 40 C < Tj < 150 C; M0 = M1 = H; RUL= 9.1 k (connected between CANH and LOAD); RRSL = 39 k; all voltages with respect to ground; positive current defined flowing into pin; unless otherwise specified Parameter Symbol Limit Values min. typ. max. Unit Test Condition
Current Consumption Supply current at Vbatt; Ibatt sleep mode Supply current at VCC; ICC sleep mode Supply current at Vbatt Supply current at Vbatt Supply current at Vbatt Supply current at Vbatt Supply current at VCC - - - - - - - 20 10 3 1.5 5 4 3 40 30 6 3 9 6 5 A A mA mA mA mA mA M0 = M1 = L; M0 = M1 = L; TxD = L TxD = H TxD = L; M0 = L TxD = H; M0 = L TxD = H or L; M0 = H or L
Ibatt Ibatt Ibatt Ibatt ICC
Over- and Under Voltage Lockout UV Switch ON voltage VUVON - 5.2 4.6 0.6 33 32 2 5.6 5.1 - 38 36 - V V V V V V
UV Switch OFF voltage VUVOFF 4.00 UV ON/OFF Hysteresis OV Switch OFF voltage OV ON/OFF Hysteresis
VUVHY
-
Vbatt increasing; VCC = 5 V Vbatt decreasing; VCC = 5 V VUVON - VUVOFF Vbatt increasing Vbatt decreasing VOVOFF - VOVON
VOVOFF 30
28 0.2
OV Switch ON voltage VOVON
VOVHY
Data Sheet Rev. 2.5
10
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TLE 6255 G
5.5 V < Vbatt < 16 V; 4.75 V < VCC < 5.25 V; - 40 C < Tj < 150 C; M0 = M1 = H; RUL= 9.1 k (connected between CANH and LOAD); RRSL = 39 k; all voltages with respect to ground; positive current defined flowing into pin; unless otherwise specified Parameter Symbol Limit Values min. typ. max. Unit Test Condition
Power ON/OFF Reset at VCC Power ON Reset voltage Power OFF Reset voltage POR ON/OFF Hysteresis Transceive Input TxD H-input voltage threshold L-input voltage threshold Hysteresis of input voltage Pull up current
VPORON 4.00 VPOROF 3.50 VPORHY 0.1
4.25 4.50 3.75 4.00 0.5 -
V V V
VCC increasing VCC decreasing VPORON - VPOROF
VTxDH VTxDL
- 0.3 x
2.6 2.4
0.7 x
V V mV A ms
- - - 0 V < VTxD < 4 V -
VCC
-
VCC
VTxDHY 50
- 20 5
200 500 - 10 - 5 10 30
ITxD Timeout reaction time tTOR
Receive Output RxD Output leakage current IRxDLK Output low voltage level Falltime -2 - - 0 0.2 80 10 0.4 200 A V ns
VRxDL tFRxD
VRxD = 5 V IRxDL = 2 mA CRxD = 25 pF to GND
Data Sheet Rev. 2.5
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TLE 6255 G
5.5 V < Vbatt < 16 V; 4.75 V < VCC < 5.25 V; - 40 C < Tj < 150 C; M0 = M1 = H; RUL= 9.1 k (connected between CANH and LOAD); RRSL = 39 k; all voltages with respect to ground; positive current defined flowing into pin; unless otherwise specified Parameter Symbol Limit Values min. typ. max. Unit Test Condition
Mode Input M0 and M1 H-input voltage threshold L-input voltage threshold Hysteresis of input voltage Pull down current
VM0,1H VM0,1L
- 0.3 x
2.6 2.4
0.7 x
V V mV A
- - - 1 V < VM0,1 < 5 V
VCC
-
VCC
VM0,1HY 50 IM0,1
5
200 500 20 50
Mode Change Delaytimes Normal to high-speed
tDNH
-
5
30
s
M1 H to L; (not tested, specified by design) M0 H to L (not tested, specified by design) M0 and M1 H to L (not tested, specified by design) M0 and M1 L to H (not tested, specified by design)
Normal to wakeup call tDNW
-
5
30
s
Normal to sleep
tDNS tDSN
-
5
500
s
Sleep to normal
-
5
50
s
Slewrate Input RSL Output voltage
VRSL
2.5
3
3.5
V
IRSL = 100 A
Data Sheet Rev. 2.5
12
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TLE 6255 G
5.5 V < Vbatt < 16 V; 4.75 V < VCC < 5.25 V; - 40 C < Tj < 150 C; M0 = M1 = H; RUL= 9.1 k (connected between CANH and LOAD); RRSL = 39 k; all voltages with respect to ground; positive current defined flowing into pin; unless otherwise specified Parameter Symbol Limit Values min. typ. max. Unit Test Condition
CANH as Bus Input / Receiver Wake up offset threshold Wake up fixed threshold Wakeup dead time
VIHWUO Vbatt - -
4.30
Vbatt - V
3.25 8.10 50 10 2.2 V s s V
Vbatt = 8 V
see note; see Figure 8 see note; see Figure 8
VIHWUF 6.15
10 1 1.8
7.1 21 5 2
Vbatt = 14 V
- -
tDWU Wakeup minimal pulse tWUMIN
time Receive threshold; in normal, high-speed and wake-up mode Receive hysteresis Receive propagation time Receive propagation time; high speed
VIH VRHY tCRF tCRF
6 V < Vbatt < 16 V
50 0.05 0.05
80 0.3
200 1
mV s s
-
0.25 0.5
VCANH > (VIH + 0.8 V) to RxD = L; 6 V < Vbatt < 16 V VCANH > (VIH + 0.8 V) to
RxD = L; M1 = L; 6 V < Vbatt < 16 V; Tj < 125 C
Receive propagation time Receive propagation time; high speed
tCRR tCRR
0.05
0.3
1
s
0.05
0.25 0.5
s
VCANH < (VIH - 0.8 V) to RxD = H; RRxD = 2.4 k 6 V < Vbatt < 16 V VCANH < (VIH - 0.8 V) to RxD = H; RRxD = 2.4 k M1 = L; 6 V < Vbatt < 16 V; Tj < 125 C
see Figure 7
Receive blanking time tCRB after CANH H to L transition
1.5
3.0
5.0
s
Note: The device will send a wake up call to the microcontroller at the minimum of VIHWUO or VIHWUF.
Data Sheet Rev. 2.5
13
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TLE 6255 G
5.5 V < Vbatt < 16 V; 4.75 V < VCC < 5.25 V; - 40 C < Tj < 150 C; M0 = M1 = H; RUL= 9.1 k (connected between CANH and LOAD); RRSL = 39 k; all voltages with respect to ground; positive current defined flowing into pin; unless otherwise specified Parameter Symbol Limit Values min. typ. max. Unit Test Condition
CANH as Bus Output / Transmitter Offset wakeup output high voltage Fixed wakeup output high voltage Bus output high voltage; normal and high speed Bus output leakage current
VOHWUO Vbatt - -
1.5
Vbatt
V
220 < RUL < 9.1 k; TxD = L; M0 = L; 6 V < Vbatt < VOHWUF 220 < RUL < 9.1 k TxD = L; M0 = L VOHWUF < Vbatt < 16V 100 < RUL < 9.1 k TxD = L; 6 V < Vbatt < 16 V TxD = L; VCANH = 0 V TxD = H; Tj < 125 C; Vbatt - 28 V < VCANH < Vbatt - 1 V 0 V < Vbatt < VUVOFF; Vbatt - 28 V < VCANH < Vbatt - 1 V
VOHWUF 9.7 VOH
-
12
V
3.60
4.0
4.55
V
Bus output current limit IOLI
200 - 10
250 350 - 200
mA A
IOLK
Bus output leakage IOLK current (loss of ground) Slew rate rising edge, normal mode Slew rate rising edge, wake-up mode Slew rate rising edge; high speed; Transmit propagation time; normal mode Transmit propagation time; wake-up mode SCANH SCANH SCANH
- 50
-
200
A
- - 5 2
2.0 4.0 16 5
- - 25 6
V/s 20% < VCANH < 80% V/s 20% < VCANH < 80% M0 = L; Vbatt = 12 V V/s 20% < VCANH < 80% M1 = L; Tj < 125 C s TxD = (H to L) to VCANH = (VIH + 0.8 V) 1.0 s < < 3.6 s; TxD = (H to L) to VCANH = (VIH + 0.8 V); M0 = L; Vbatt = 12 V; 1.0 s < < 3.6 s
tTCF tTCF
1
5
4
s
Data Sheet Rev. 2.5
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TLE 6255 G
5.5 V < Vbatt < 16 V; 4.75 V < VCC < 5.25 V; - 40 C < Tj < 150 C; M0 = M1 = H; RUL= 9.1 k (connected between CANH and LOAD); RRSL = 39 k; all voltages with respect to ground; positive current defined flowing into pin; unless otherwise specified Parameter Symbol Limit Values min. - typ. max. 0.5 1.5 s TxD = (H to L) to VCANH = (VIH + 0.8 V); M1 = L; < 1 s; Tj < 125 C TxD = (L to H) to VCANH = (VIH - 0.8 V) 1.0 s < < 3.6 s; TxD = (L to H) to VCANH = (VIH - 0.8 V); M0 = L; 1.0 s < < 3.6 s; TxD = (L to H) to VCANH = (VIH - 0.8 V); M1 = L; < 1.6 s; Tj < 125 C Unit Test Condition
Transmit propagation tTCF time; high speed mode
Transmit propagation time; normal mode Transmit propagation time; wake-up mode Transmit propagation time; high speed
tTCR tTCR tTCRH
3
5
8
s
3
-
12.7
s
-
-
3.0
s
Unit-Load Resistor Ground Input LOAD Output low voltage level
VLOAD
-
20 -
100 50
mV A
Output leakage current ILOADLK - 50 (loss of ground)
ILOAD = 2 mA; 8 V < Vbatt < 16 V 0 V < Vbat < VUVOFF Tj < 125 C; Vbatt - 28 V < VCANH < Vbatt - 1 V
Data Sheet Rev. 2.5
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TLE 6255 G
10
Diagrams
VTxD 50% t t TCF VCANH 80% VIH t t t tR VRxD 50% t V with 20% < VCANH < 80% t t CRF t tF t CRR V VIH t TCR
20%
Bus Output Slewrate Definition: S CANH =
AET02566
Figure 3
Input/Output-Timing (Pin CANH, TxD and RxD)
Data Sheet Rev. 2.5
16
2003-11-27
TLE 6255 G
SCANH
5.0 V s 2.0
AED02570
1.0
0.5
0.2
0.1 20 35 50 100 200 500 kOhm R RSL 1000
Figure 4
Slewrate SCANH vs. Programming Resistor RRSL (Pin RSL)
VCANH VIHWU VIH t VRxD tp t DWU No Wake Up t p < t DWU tp t DWU t WUMIN Controller Wake Up t p < t DWU t
AET02571
Figure 5
Wakeup Deadtime tDWU
Data Sheet Rev. 2.5
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TLE 6255 G
VTxD VIH t VCANH VIH t H Time Out Counter L t TOR Active Time Out Passive Normal Operation Bus Blocked Bus Available Normal Operation
AET02572
Parasitic dominant "L" on TxD
t
t
Status
Figure 6
Bus Dominant Blanking Time tTOR
Data Sheet Rev. 2.5
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TLE 6255 G
VTxD
t VCANH VIH Bus Ringing Bus Ringing
t VRxD
t t CRB Without Blanking Feature With Blanking Feature
AET02573
Figure 7
RxD Blanking Time tCRB
Data Sheet Rev. 2.5
19
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TLE 6255 G
V IHWU
8 V 7 6 5 4 3 2 1 0 0 2 4 6 8 10 12 14 16 18 20 22 VS T j = 150 C T j = 25 C T j = -40 C
AED02781
24 V 26
Figure 8
Wake-up Threshold VIHWU vs. Supply Voltage VS
Data Sheet Rev. 2.5
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TLE 6255 G
11
Application Circuit
ECU R WADJ 91 k Watchdog Output Reset-Threshold 1 Adjust (optional) 7 C0 TLE 4278G Reset Output Reset Delay 6 14 47 nF V VQ 9 13 3-5, 10-12 C S1 C CC1 GND 220 nF 22 F DR 1N4001 C S2 100 nF C S3 4.7 F V Batt 10 L UL 47 H C UL 220 pF
Single Wire CAN Bus
Watchdog Adjust
2
8
Watchdog Input
VCC C CC2 Controller
VCC 6 9 3 RSL M0 M1 RxD TxD
R RSL 39 k
R RxD 2.4 k
R TxD 10 k
CANH R UL 9.1 k Load
12 TLE 6255G 11 1, 7, 8, 14 GND
4 5 2
VBattery
GND
AES02574
Figure 9
Application Circuit
Data Sheet Rev. 2.5
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TLE 6255 G
12
Package Outlines
P-DSO-14-9 (Plastic Dual Small Outline)
Sorts of Packing Package outlines for tubes, trays etc. are contained in our Data Book "Package Information". SMD = Surface Mounted Device Data Sheet Rev. 2.5 22
Dimensions in mm 2003-11-27
GPS09222
TLE 6255 G
Edition 2003-11-27 Published by Infineon Technologies AG, St.-Martin-Strasse 53, D-81541 Munchen
(c) Infineon Technologies AG 2003. All Rights Reserved.
Attention please! The information herein is given to describe certain components and shall not be considered as warranted 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. Infineon Technologies is an approved CECC manufacturer. Information For further information on technology, delivery terms and conditions and prices please contact your nearest Infineon Technologies Office in Germany or our Infineon Technologies Representatives worldwide (see address list). Warnings Due to technical requirements components may contain dangerous substances. For information on the types in question please contact your nearest Infineon Technologies Office. Infineon Technologies Components may only be used in life-support devices or systems with the express written approval of Infineon Technologies, if a failure of such components can reasonably be expected to cause the failure of that life-support device or system, or to affect the safety or effectiveness of that device or system. Life support devices or systems are intended to be implanted in the human body, or to support and/or maintain and sustain and/or protect
Data Sheet Rev. 2.5
23
2003-11-27

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