CF150C CAN BUS TRANSCEIVER. Technical Data. Receiver. Transmitter. Protection. Microelectronics FEATURES BLOCK DIAGRAM 1 &

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Microelectronics Technical Data CN BUS TRNSCEIVER CF50C The CF50 is a bidirectional transceiver for signal conditioning and processing in connection with a CN controller.

FETURES - CF 50 meets ISO/DIS 898 up to 500 kbaud - Transmitter - Generation of differential output signals - Short circuit protected from -5 V to +36 V, detection & shutdown - Slope control to

1 Microelectronics Technical Data CN BUS TRNSCEIVER CF50C The CF50 is a bidirectional transceiver for signal conditioning and processing in connection with a CN controller. Data rates of up to 500 kbaud are supported using either shielded or non-shielded pair of lines. FETURES - CF 50 meets ISO/DIS 898 up to 500 kbaud - Transmitter - Generation of differential output signals - Short circuit protected from -5 V to +36 V, detection & shutdown - Slope control to reduce RFI and EMI - Two states adjustable slope control ( 500 kbaud / 25 kbaud) - Receiver - Differential input with high interference suppression - Common mode input voltage range (V COM ) from -5 V to 2 V - Package: SOIC 8 BLOCK DIGRM Pin & td Pin 3 TX0 & 8 4 SC RX0 VS C_H C_L RX V REF V CLmax B 2 Receiver Protection Transmitter Page of 0

2 PINNING TXO 8 SC B 2 7 C_H 3 6 C_L RXO 4 5 RX PIN DESCRIPTION Pin Name Description TXO Transmitter input 2 B Ground 3 Supply voltage 4 RXO Receive output 5 RX Reference voltage 6 C_L Low side bus output 7 C_H High side bus output 8 SC djustable slope control Page 2 of 0

3 MXIMUM RTINGS ll voltages, except bus voltage, are defined with respect to pin B. Positive currents flow into the IC. Rating Condition Symbol Min. Max. Unit Supply voltage () V -0,3 7 V Bus voltage (C_H,C_L) 0V < V < 5,5V V C_H, V C_L V Off state leakage current at C_H, C_L 0V < V <5,5V -5V < V C_H <36V -5V < V C_L <36V I C_H, I C_L - 4 m DC voltage at TXO, SC 0V < V < 5,5V V X V B -0,3V V +0,3V Output current at RXO 0V < V < 5,5V I RXO -0,3 m Storage temperature T ST C Operating temperature T OP C Junction temperature T J C CHRCTERISTICS ll voltages, except bus voltage, are defined with respect to pin B. Positive currents flow into the IC. General conditions: -40 C < T OP < 0 C 4,5 V < V < 5,5 V Comment: Dominant: V TXO = V B Recessive: V TXO = V Rating Conditions Symbol Min. Typ. Max. Unit Supply voltage V 4,5 5 5,5 V Supply current Dominant I m Supply current Recessive I m Page 3 of 0

4 TRNSMITTER SECTION R : 60 Ω between C_H and C_L Rating Conditions Symbol Min. Typ. Max. Unit TXO Input capacitance V B < V TXO <V C TXO 25 pf TXO High level input voltage V TXO 0.7V TXO Low level input voltage V TXO 0 0.3V TXO High level input current V TXO = V I TXO µ TXO Low level input current V TXO = V B I TXO µ SC Input capacitance V B < V SC <V C SC 25 pf SC Input voltage for high speed SC Input voltage for low speed V V SC 0 0.V V SC 0.9V SC Input current V SC = V I SC µ V SC = V B I SC µ Bus voltage recessive Recessive V C_H V C_L 0.4V Leakage current recessive -2V<V C_L <7V -2V<V C_H <7V 0.5V V 0.6V I C_H m I C_L Leakage current recessive V<V C_L <4V V<V C_H <4V I C_H m I C_L Input resistance Recessive R IN(C_H,C_L) 8.5 kω Differential input resistance Recessive R Diff(C_H,C_L) 37 kω Differential output voltage Dominant, R V Diff= V C_H -V C_L.5 3 V Differential output voltage Recessive V Diff= V C_H -V C_L mv Short circuit detection time C_H to C_L C_H to B Supply current in case of short circuit, C_H to C_L, C_H to B (time = t d ) Overvoltage protection threshold on C_L short circuit resistance < Ω t d 5 0 µs I 50 m V C_Lmax V Page 4 of 0

5 RECEIVER SECTION Rating Conditions Symbol Min. Typ. Max. Unit RXO High level output voltage V Diff < 0,5V I RXO =-0,3m -2V < V C_H < 7V -2V < V C_L < 7V RXO Low level output voltage V Diff > 0,9V I RXO =m -2V < V C_H < 7V -2V < V C_L < 7V V RXO 0,9V V V V RXO 0,5 V Input signal threshold -2V < V C_H < 7V -2V < V C_L < 7V V S= mv V C_H- V C_L Differential input hysteresis V HYS 00 mv REFERENCE OUTPUT Rating Conditions Symbol Min. Typ. Max. Unit Reference voltage I RX =0 V RX 0,45V 0,5V 0,55V V Output resistance R RX 2 20 kω DYNMIC CHRCTERISTICS General conditions: C : 47 pf between C_H and C_L, V =5V, t R <5ns C RXO : 20 pf between RXO and B, R : 60 Ω between C_H and C_L Rating Conditions Symbol Min. Typ. Max. Unit Signal delay TXO to C_H,C_L t OT 50 ns Differential output slew rate (Transmitter) V SC = V B SR V/µs V SC = V SR 5 20 V/µs Signal delay C_H,C_L to R XO V SC = V B t OR 50 ns Signal delay TXO to RXO V SC = V B t OTR 300 ns Page 5 of 0

6 FUNCTIONL DESCRIPTION The CF50 is used as an interface between a CN controller and the physical bus. The device provides transmitting capability to the CN controller. The transmitter outputs C_H and C_L are protected against short circuits. In case of short circuit (C_H to C_L, C_H to B) the protection circuit recognizes this fault condition and the transmitter output stages are disabled with a delay of max. 0 µs to prevent destruction of the IC and high consumption of supply current I. If V C_L > V C_Lmax the transmitter output stages would be disabled immediately. Pin SC makes it possible to select two different modes of operation: High speed ( 500kBaud) and low speed ( 25kBaud). The SC pin is tied to V B for normal operation at 500kBaud. For slower speed operation at 25kBaud the rise and fall slope of the bus output can be decreased to reduce EMI by connecting the SC pin to V. FUNCTIONL TBLE TXO C_H C_L Bus State RXO L H L Dominant L H or Floating Floating V /2 Floating V /2 Recessive H PPLICTION NOTE R V COM V n System n Controller CF50 CN Bus System m V m V Bn V BD CF50 Controller V Bm C_H V Bm R C_L V Diff Page 6 of 0

7 TIMING DIGRM t R t R V TXO t OT t OT V Diff 0,9V 0,5V V RXO t OR t OR t OTR totr Page 7 of 0

8 PPENDIX EMC PERFORMNCE OF CF50C (RECEIVER)* equivalent terminating resistor 2 x 20Ω parallel at line ends 6,8µF Monitoring (Bit comparison) CN Controller CN Controller 2 CN 250Kbit/sec Transceiver CN 250Kbit/sec Transceiver 2 0,U st 450Ω 50Ω U st (Noise signal, 2Û ~ 50U st ) 00Ω 40dB hp ,8µF 90%M, khz 2Û U ST [V] 30V SS not noise resistant CF50C noise resistant 20V SS min. request boundary (automotive industry) 0V SS MHz 0MHz 00MHz 500MHz GHz f *) Typical behavior, not tested Page 8 of 0

9 PPENDIX EMC PERFORMNCE OF CF50C (TRNSMITTER)* 50Ω 4,7nF TX0 B SC C_H equivalent terminating resistor 2 x 20Ω parallel at line ends 4,7nF 50Ω +5V C_L 80dBµV RX0 RX µv TEK 495 nalyzer CN-Transceiver without EMC reducing measures CF50C with EMC reducing measures Transceiver sending TX0 SC equivalent terminating resistor 2 x 20Ω parallel at line ends 50Ω B C_H 4,7nF 50Ω 5V +5V C_L 250kHz RX0 RX µv TEK 495 nalyzer CN-Transceiver without EMC reducing measures CF50C with EMC reducing measures *) Typical behavior, not tested Page 9 of 0

10 Package: SOIC 8 - Narrow L S b e E e3 D M Ref. Data Book mm Typ Min Max.75 a a2.65 b b C 0.50 c 45 o D see variations E e.27 e3 see variations F L M 0.6 S 8 o Variations D/ mm N Typ Min Max Variations e3/mm N Typ Min Max /98 Robert Bosch K.K. Bosch Technical Center 9-, Ushikubo 3-chome Tsuzuki-ku, Yokohama 224 Tel.: 045 (92) 8282 Fax: 045 (92) 9573 For further information: Robert Bosch Corporation utomotive Group (UO/SM2) Hills Tech Drive Farmington Hills, MI Tel.: (248) Fax: (248) Robert Bosch GmbH bteilung K8/VKF Postfach Reutlingen Tel.: (072) Fax: (072)

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