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U6812B Datasheet

  • U6812B

  • Single-ended Bus Transceiver with Triple Buffer

  • 10頁

  • ATMEL   ATMEL

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Features
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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 stan-
dard 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鈥檚 bipolar pro-
cess and fully complies to automotive industry specifications.The U6812B provides an
ideal grouping of SO-packaged low-power drivers, thus meeting customers鈥?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鈥揂UTO鈥?0/03

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