ATA6621N-PGQW Atmel, ATA6621N-PGQW Datasheet - Page 7

• Manufacturer Part Number: ATA6621N-PGQW
• Description: TXRX LIN 5V REG WATCHDOG 20-QFN
• Manufacturer: Atmel
• Type: Transceiverr

Specifications of ATA6621N-PGQW

• Number Of Drivers/receivers: 1/1
• Protocol: LIN
• Voltage - Supply: 5 V ~ 18 V
• Mounting Type: Surface Mount
• Package / Case: 20-QFN Exposed Pad
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

ATA6621N
The overall supply current from V
is the addition of 40 µA plus the V
regulator output current
Bat
CC
I
.
VCCs
In Silent mode, the 5V regulator is in low tolerance mode (4.65V to 5.35V) and can source up to
50 mA. The internal slave termination between pin LIN and pin VS is disabled to minimize the
power dissipation in case pin LIN is shorted to GND. Only a weak pull-up current (typically
10 µA) between pin LIN and pin VS is present.
The Silent mode voltage tolerance is sufficient to run the internal timers of the microcontroller.
The undervoltage reset is now V
< 4.4V. If an undervoltage condition occurs, the NRES is
ccthS
switched to low and the ATA6621N changes state to Pre-normal mode.
A falling edge at pin LIN followed by a dominant bus level maintained for a certain time period
(t
) results in a remote wake-up request. The device switches from Silent mode to Pre-normal
bus
mode. The internal LIN slave termination resistor is switched on. The remote wake-up request is
indicated by a low level at pin RXD to interrupt the microcontroller (see
Figure 3-3 on page
8).
With EN high, you can switch directly from Silent mode to Normal mode.
Figure 3-2.
Switch to Silent Mode
Silent Mode
EN
Mode Select window
TXD
t
= 3.2 µs
d
NRES
VCC
Delay time Silent Mode
t
_sleep = maximum 15 µs
d
LIN
LIN switches directly to recessive mode
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4887I–AUTO–09/09