Product Summary

The M6636B is a transmission controller for automotive LAN based on data communication protocol SAE-J1850. This device can realize a data bus topology bus LAN system with a PWM bit encoding method (41.6 kbps). In addition to a protocol control circuit, the M6636B has an enclosed quartz oscillation circuit, host CPU interface (parallel interface), a transmit/receive buffer, and a bus receiver circuit that decreases the burden on the host CPU.

Parametrics

M6636B absolute maximum ratings: (1)Power Supply Voltage, DVDD, AVDD: –0.3 to +7.0 V; (2)Input Voltage, VI: –0.3 to DVDD+0.3 V; (3)Output Voltage, VO: –0.3 to DVDD+0.3 V; (4)Power Dissipation, PD: 780 mW; (5)Storage Temperature, TSTG: –55 to +150℃.

Features

M6636B 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; (9)Three types of in-frame response support:; (10)Error detection by cyclic redundancy check (CRC); (11)Various communication error detections; (12)Dual-wire bus abnormality detection by internal bus receiver and fault tolerance function; (13)Host CPU interface is accessed in parallel; (14)Sleep function; (15)Package: 24-pin plastic SOP (SOP24-P-430-1.27-K) (Product name : MSM6636BGS-K).

Diagrams

M6636B block diagram

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