U6812B
U6812B is Single-ended Bus Transceiver manufactured by Atmel.
Features
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Wide Power Supply Voltage Range Short-circuit Protected K-interface, ISO9141 patible Three Short-circuit Protected 40-m A Open-collector Buffers All Low-power Outputs with Built-in 28-V Clamping CMOS patible Digital Inputs with Hysteresis Digital 1-m A Push-pull "Rx D" 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 munication in automotive diagnostic applications. The standard K-line is ISO 9141 patible for baud rates up to 250 k Baud. The IC provides three universally applicable 40-m A open-collector buffers, that can be used for signal decoupling. The U6812B is manufactured using Atmel’s bipolar process and fully plies 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
K-diagnosis ISO 9141
VS/2
VCC/2
OUT 1 IN 1
VCC/2 VCC
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
5 6 7 8 12 VS
11 IN 1 10 OUT 1 9 GND
Pin Description
Pin 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 Symbol GND OUT 2 IN 2 DIS VCC IN 3 OUT 3 GND GND OUT 1 IN 1 VS RXD TXD K GND Type Supply Open-collector output Digital input Digital input Supply Digital input Open-collector output Supply Supply Open-collector output Digital input Supply/reference Digital output Digital input 12-V input and O.C. output Supply Function Ground; all ground pins are directly connected to the lead frame Protected output of driver 2 (faced to: outside)...
