ATA6625-TAPY 19 Atmel, ATA6625-TAPY 19 Datasheet - Page 8

• Manufacturer Part Number: ATA6625-TAPY 19
• Description: TXRX LIN BUS 5V W/VREG 8SOIC
• Manufacturer: Atmel
• Type: Transceiverr

Specifications of ATA6625-TAPY 19

• Number Of Drivers/receivers: 1/1
• Protocol: LIN
• Voltage - Supply: 5 V ~ 27 V
• Mounting Type: Surface Mount
• Package / Case: SO-8
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

4.3
Sleep Mode
A falling edge at EN while TXD is low switches the IC into Sleep Mode. The TXD Signal has to
be logic low during the Mode Select window
(Figure 4-4 on page
8). To avoid influencing the
LIN-pin during the switch to sleep mode, it is possible to switch the EN up to 3.2µs earlier to
LOW than the TXD. Even if the two falling edges at TXD and EN occur at the same time, the
LIN line will remain uninfluenced.
In Sleep Mode the transmission path is disabled. The supply current I
from V
is typi-
VSsleep
Batt
cally 10µA. The V
regulator is switched off, NRES and RXD are low. The internal slave
CC
termination between pin LIN and pin VS is disabled, only a weak pull-up current
(typically 10µA) between pin LIN and pin VS is present. Sleep Mode can be activated indepen-
dently from the current level on pin LIN.
A voltage less than the LIN Pre-wake detection V
at pin LIN activates the internal LIN
LINL
receiver and switches on the internal slave termination between the LIN pin and the VS pin.
A falling edge at the LIN pin followed by a dominant bus level maintained for a certain time
period (> t
) and a following rising edge at pin LIN results in a remote wake-up request. The
bus
device switches from Sleep Mode to Fail-safe Mode.
The V
regulator is activated, and the remote wake-up request is indicated by a low level at
CC
the RXD pin to interrupt the microcontroller
(Figure 4-5 on page
9).
EN high can be used to switch directly from Sleep to Fail-safe Mode. If EN is still high after
VCC ramp up and undervoltage reset time, the IC switches to Normal Mode.
Figure 4-4.
Switch to Sleep Mode
Normal Mode
Sleep Mode
EN
Mode select window
TXD
t
= 3.2µs
d
NRES
VCC
Delay time sleep mode
t
= maximum 20µs
d_sleep
LIN
LIN switches directly to recessive mode
Atmel ATA6623/ATA6625
8
4957I–AUTO–03/11