Datasheet CXPI Transceiver for Automotive BD41000AFJ-C General Description Key Specifications BD41000AFJ-C is a transceiver for the CXPI (Clock Power Supply Voltage +7V to +18V Extension Peripheral Interface) communication. Absolute Maximum Rating of BAT -0.3V to +40V Switching between Master/Slave Mode can be done Absolute Maximum Rating of BUS -27V to +40V using external pin (MS pin). Power OFF Mode Current 3 A (Typ) Low power consumption during standby Operating Temperature Range -40C to +125C (non-communication) using Power Saving function. Arbitration function stops the data output upon detection of BUS data collision. Also Fail-safe function stops Package W(Typ) x D(Typ) x H(Max) outputs upon detection of under voltage or temperature SOP-J8 4.90mm x 6.00mm x 1.65mm abnormality. Features (Note1) AEC-Q100 Qualified CXPI standards Qualified Transmission speed range from 5kbps to 20kbps Master/Slave switching function Microcontroller interface corresponds to 3.3V/5.0V Built-in terminator (30k) Power saving function Data arbitration function Built-in Under Voltage Lockout (UVLO) function Built-in Thermal Shutdown (TSD) function SOP-J8 Low EME(Electromagnetic Emission) High EMI(Electromagnetic Immunity) High ESD(Electrostatic Discharge) robustness (Note1: Grade 1) Applications Automotive networks Typical Application Circuit CXPI BUS V ECU Master node Regulator 10k 2.7k VDD INT MS(8) BAT(7) RXD(1) RXD 100nF Micro TXD TXD(4) Controller BD41000AFJ-C 1k CLK CLK(3) (Note 1) BUS(6) NSLP(2) I/O 1nF GND GND(5) Slave node Regulator 2.7k(Note 2) 10k 2.7k MS(8) VDD INT BAT(7) RXD RXD(1) 100nF Micro TXD TXD(4) Controller BD41000AFJ-C CLK CLK(3) (Note 1) BUS(6) I/O NSLP(2) 220pF GND GND(5) Note 1 INT: Interrupt, RXD: UART RXD, TXD: UART TXD, CLK: Clock, I/O: General Purpose I/O Note 2 While using slave, It is no problem that CLK is opened in the case of non-using CLK output. Figure 1. Typical Application Circuit Consider the actual application design confirming the following linked document before applying this product. Application Note Product structure : Silicon monolithic integrated circuit This product has no designed protection against radioactive rays w ww.rohm.com TSZ02201-0E2E0H600190-1-2 2017 ROHM Co., Ltd. All rights reserved. 1/20 TSZ2211114001 2019.03.26 Rev.003 BD41000AFJ-C Pin Configuration (TOP VIEW) RXD MS 1 8 NSLP BAT 2 7 CLK 3 6 BUS TXD GND 4 5 Figure 2. Pin Configuration Pin Description Table 1. Pin Description Pin No. Pin Name Function 1 RXD Received data output pin Power saving control input pin 2 NSLP (H Change to Codec mode, L Change to Power OFF mode) Clock signal input/output pin 3 CLK (Master setting: Input, Slave setting: Output) 4 TXD Transmission data input pin 5 GND Ground 6 BUS CXPI BUS pin 7 BAT Power supply pin Master/Slave switching pin 8 MS (H: Master, L: Slave) Block Diagram 7 BAT BAT Thermal Under Voltage Power on Shutdown Lockout Reset Regulator (TSD) (UVLO) (POR) To each block MS 8 30k LOGIC Low Pass 1 RXD 6 BUS Filter Decoder Wakeup Timer Slope Control 4 TXD Arbiter Encoder Dominant Timeout Counter (DTC) Controller Slope 2 NSLP Timer 3 CLK Timing Generator Oscillator 5 GND Figure 3. Block Diagram www.rohm.com TSZ02201-0E2E0H600190-1-2 2017 ROHM Co., Ltd. All rights reserved. 2/20 TSZ22111 15 001 2019.03.26 Rev.003