ATA6661-TAQ Atmel, ATA6661-TAQ Datasheet - Page 4

• Manufacturer Part Number: ATA6661-TAQ
• Manufacturer: Atmel

Specifications of ATA6661-TAQ

• Number Of Transmitters: 1
• Power Supply Requirement: Single
• Package Type: SO
• Operating Temperature Classification: Automotive
• Mounting: Surface Mount
• Pin Count: 8
• Operating Temperature (max): 125C
• Operating Temperature (min): -40C
• Dual Supply Voltage (typ): Not RequiredV
• Dual Supply Voltage (max): Not RequiredV
• Dual Supply Voltage (min): Not RequiredV
• Lead Free Status / RoHS Status: Not Compliant

3.7
3.8
3.9
4
Enable Input Pin (EN)
Inhibit Output Pin (INH)
Wake-up Input Pin (WAKE)
ATA6661
This pin controls the operation mode of the interface. If EN = 1, the interface is in normal mode,
with the transmission path from TXD to LIN and from LIN to Rx both active. If EN = 0, the device
is switched to sleep mode and no transmission is possible. In sleep mode, the LIN bus pin is
connected to V
woken up (see next section
During sleep mode the device is still supplied from the battery voltage. The supply current is typ-
ically 10 µA. The pin EN provides a pull-down resistor in order to force the transceiver into sleep
mode in case the pin is disconnected.
This pin is used to control an external switchable voltage regulator having a wake-up input. The
inhibit pin provides an internal switch towards pin V
high-side switch is turned on and the external voltage regulator is activated. When the device is
in sleep mode, the inhibit switch is turned off and disables the voltage regulator.
A wake-up event on the LIN bus or at pin WAKE will switch the INH pin to the V
system power-up (V
R
This pin is a high-voltage input used to wake-up the device from sleep mode. It is usually con-
nected to an external switch in the application to generate a local wake-up. If you do not need a
local wake-up in your application, connect pin WAKE directly to pin VS. A pull-up current source
with typically –10 µA is implemented. The voltage threshold for a wake-up signal is 3V below the
VS voltage with an output current of typical –3 µA.
Wake-up events from sleep mode:
Figure 3-1 on page
DSon
• LIN bus
• EN pin
• WAKE pin
of the high-side output is < 1 k .
S
with a weak pull-up current source. The device can transmit only after being
6,
S
Figure 3-2
rises from zero), the pin INH switches automatically to the V
“Inhibit Output Pin (INH)”
and
Figure 3-3 on page 7
S
. If the device is in normal mode, the inhibit
).
show details of wake-up operations.
4729M–AUTO–02/09
S
level. After a
S
level. The