Product Summary

The MSM6636B is a transmission controller for automotive LAN based on data communication protocol SAE-J1850. The MSM6636B can realize a data bus topology bus LAN system with a PWM bit encoding method (41.6 K bps). In addition to a protocol control circuit, the MSM6636B has an enclosed quartz oscillation circuit, host CPU interface (clock synchronous serial / UART), a transmit/receive buffer, and a bus receiver circuit that decreases the burden on the host CPU.

Parametrics

MSM6636B absolute maximum ratings: (1)Power Supply Voltage, DVDD, AVDD: -0.3 to 7.0V; (2)Input Voltage, VI: -0.3 to DVDD+0.3V; (3)Output Voltage, VO: -0.3 to DVDD+0.3V; (4)Power Dissipation, PD(DIP), Ta = 25℃: 780mW; (5)Storage Temperature, TSTG: -55 to 150℃.

Features

MSM6636B features: (1)Based on SAE-J1850 CLASS B DATA COMMUNICATION NETWORK INTERFACE(issued August 12, 1991); (2)Non-destructive collision and priority control using CSMA/CD; (3)Internal transmit buffer (1 frame) and receive buffer (2 frames); (4)Modulating/demodulating: PWM (Pulse Width Modulation); (5)Transmission speed: 41.6 kbps; (6)Multi-address setting with physical addressing: 1 type/ functional addressing: 15 types; (7)Address filter function by multi-addressing(broadcasting possible); (8)Automatic retransmission function by arbitration loss and non ACK.

Diagrams

MSM6636B block diagram

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