ATA6621N-PGQW Atmel, ATA6621N-PGQW Datasheet - Page 12

• 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

3.17
12
Fail-safe Features
ATA6621N
Figure 3-6.
• During a short circuit at LIN, the output limits the output current to I
• The reverse current at pin LIN is very low (< 3 µA) during loss of V
• During a short circuit at V
• Pin EN provides a pull-down resistor to force the transceiver into recessive mode if EN is
• Pin RXD is connected with 5 k to V
• Pin TXD provides a pull-up resistor to force the transceiver into recessive mode if TXD is
LIN Bus
dissipation, the chip temperature exceeds T
cools down and after a hysteresis of T
overtemperature switch-off, the V
behavior for bus systems where some slave modes are supplied from battery or ignition.
undervoltage, NRES switches to low and sends a reset to the microcontroller. The IC
switches into Pre-normal mode. If the chip temperature exceeds the value T
output switches off. The chip cools down and after a hysteresis of T
again. Because of Pre-normal mode, the V
switched off from the microcontroller. The microcontroller can start its normal operation.
disconnected.
disconnected.
NRES
RXD
VCC
TXD
EN
If undervoltage, switch to Pre-normal Mode
Node in Silent mode
Wake Up from Sleep/Silent Mode at an Insufficient Falling Edge at Pin LIN
Wake-up filtering time
VLIN < V
VLIN > 0.6 V
Silent mode
High
High
CC
t
WAKE
, the output limits the output current to I
S
- 1V and
S
CC
Regulator Wake-up time
regulator works independently.
CC
hys
, if V
, switches the output on again. During LIN
CC
Batt
LINoff
voltage will switch on again although EN is
is disconnected V
and the LIN output is switched off. The chip
Pre-normal Mode
Pre-normal mode
Undervoltage detection active
Low
Low
CC
BAT
hys
BUS_LIM
VCCn
is at GND level
, switches the output on
or GND. This is optimal
. Because of
. Due to the power
VCCoff
Normal mode
Normal Mode
4887I–AUTO–09/09
EN High
, the V
CC