3. Absolute Maximum Ratings
Stresses beyond those listed under “Absolute Maximum Ratings” may cause permanent damage to the device. This is a stress rating
only and functional operation of the device at these or any other conditions beyond those indicated in the operational sections of this
specification is not implied. Exposure to absolute maximum rating conditions for extended periods may affect device reliability.
Parameters
Symbol
VCC
VDD
Vin
Value
–0.5 to +36
–0.5 to +5.5
–0.5 to VDD
150
Unit
V
Supply voltage
Controller supply voltage
Input voltage at any input
Junction temperature
V
V
Tj
°C
°C
°C
Storage temperature range
Soldering temperature (for 10s maximum)
Tstg
–55 to +150
260
Tsld
Operating Conditions
Parameters
Symbol
VCC
Value
7 to 32
Unit
V
Supply voltage car battery
Controller supply voltage
Control input voltage
Input voltage
VDD
4.75 to 5.25
0 to VDD
V
Asel, Bsel
Tx0
V
0 to VDD
V
Operating temperature
Tamb
–40 to +105
°C
4. Operating Modes
0 = 0V, 1 = 5V
Asel
Bsel
Rx0
Mode
H, L drivers disabled, L load disabled, S-, S+ disabled station not in operation, but
consuming current
0
0
3.8V
1
0
1
0
1
1
From H
From L
Single-wire H, L driver, L load, S-, S+ disabled
Single-wire L, H driver disabled
From L-H
Two-wire operation, normal mode
ER (error signal) is low when normal operation is disturbed by line faults (interruption, short to
ground or to VCC, H to L short disturbance by high voltage transients). After a waiting period due
to transient delays, the controller is asked to test if single-wire operation is possible by changing
the Asel and Bsel state.
A
sel and Bsel have an internal pull-up resistor. Therefore, the no-connect state is 1, but connec-
tion to VDD is recommended when not in use.
4
B10011S
4749D–AUTO–10/07
ATMEL [ ATMEL ]
