U6812B

Features Wide Power Supply Voltage Range Short-circuit Protected K-interface, ISO9141 Compatible Three Short-circuit Protected 40-mA Open-collector Buffers All Low-power Outputs with Built-in 28-V Clamping CMOS Compatible Digital Inputs with Hysteresis Digital 1-mA Push-pull "RxD" K-line Output Channel-specific Over-temperature Switch Off in Event of Short Circuit Load-dump Protection and Interference Protection According to ISO 7637-1/4 (DIN 40839) Description The U6812B is a bipolar monolithic K-line bus transceiver designed to provide bi-directional serial communication in automotive diagnostic applications. The standard K-line is ISO 9141 compatible for baud rates up to 250 kBaud. The IC provides three universally applicable 40-mA open-collector buffers, that can be used for signal decoupling. The U6812B is manufactured using Atmel’s bipolar process and fully complies to automotive industry specifications.The U6812B provides an ideal grouping of SO-packaged low-power drivers, thus meeting customers’ demand for space-saving and cost-effective circuit board assembly. Single-ended Bus Transceiver with Triple Buffer U6812B Figure 1. Block Diagram VS VCC VS K-diagnosis ISO 9141 K VS/2 TXD VCC TXD VCC/2 GND OUT 1 IN 1 VCC/2 VCC GND Temperature control IN 2 OUT 2 GND DIS OUT 3 IN 3 GND Rev. 4760A–AUTO–10/03 Pin Configuration Figure 2. Pinning SO16 16 15 14 13 GND K TXD RXD GND OUT 2 IN 2 DIS VCC IN 3 OUT 3 GND 1 2 3 4 U6812B 5 6 7 8 12 VS 11 IN...