ATA6660(2003) データシートの表示（PDF） - Atmel Corporation
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ATA6660 Datasheet PDF : 11 Pages
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Pin Configuration
Figure 2. Pinning SO8
TXD 1
GND 2
VCC 3
RXD 4
8 RS
7 CANH
6 CANL
5 VREF
Pin Description
Pin
Symbol
1
TXD
2
GND
3
VCC
4
RXD
5
VREF
6
CANL
7
CANH
8
RS
Function
Transmit data input
Ground
Supply voltage
Receive data output
Reference voltage output
Low level CAN voltage input/output
High level CAN voltage input/output
Switch standby mode/normal mode
Functional
Description
Voltage Protection and
ESD
Slope Control
Overcurrent Protection
The ATA6660 is a monolithic circuit based on Atmel’s Smart Power BCD60-III technol-
ogy. It is especially designed for high-speed differential mode data transmission in harsh
environments like automotive and industrial applications. Baudrate can be adjusted up
to 1 Mbaud. The ATA6660 is fully compatible to the ISO11898, the developed standard
for high speed CAN-C (Controller Area Network) communication.
High voltage protection circuitry on both line pins, CANH (Pin 7) and CANL (Pin 6), allow
bus line voltages in the range of -40 V to +40 V. ESD protection circuitry on line pins
allow HBM = 8 kV, MM = 300 V. The implemented high voltage protection on bus line
output/input pins (7/6) makes the ATA6660 suitable for 12 V automotive applications as
well as 24 V automotive applications.
A fixed slope is adjusted to prevent unsymmetrical transients on bus lines causing EMC
problems. Controlled bus lines, both CANH and CANL signal, will reduce radio fre-
quency interference to a minimum. In well designed bus configurations the filter design
costs can be reduced dramatically.
In the case of a line shorts, like CANH to GND, CANL to VCC, integrated short current
limitation allows a maximum current of ICANH_SC or ICANL_SC. If junction temperature rises
above 165°C an internal overtemperature protection circuitry shuts down both output
stages, the receiver will stay activated.
2 ATA6660
4582B–BCD–03/03
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