ATA6621N-PGPW Atmel, ATA6621N-PGPW Datasheet - Page 6

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

Specifications of ATA6621N-PGPW

• Number Of Drivers/receivers: 1/1
• Protocol: LIN
• Voltage - Supply: 5 V ~ 18 V
• Mounting Type: Surface Mount
• Package / Case: 20-QFN Exposed Pad
• Number Of Transmitters: 1
• Number Of Receivers: 1
• Power Supply Requirement: Single
• Package Type: QFN EP
• Operating Temperature Classification: Automotive
• Mounting: Surface Mount
• Pin Count: 20
• 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: Lead free / RoHS Compliant

3.13
3.14
3.15
Figure 3-1.
3.15.1
3.15.2
6
MODE Input Pin
TM Input Pin
Modes of Operation
Communication: ON
VCC: 5V 2%/50 mA
with undervoltage
monitoring
ATA6621N
Normal Mode
Silent Mode
Normal Mode
Modes of Operation
b
For normal watchdog operation connect pin MODE via an external resistor to GND (see
5-2 on page
dog is switched off.
Pin TM is used in final production measurement at Atmel
nected to GND.
This is the normal transmitting and receiving mode. The voltage regulator is in normal mode and
can source 50 mA. The undervoltage detection is activated. The watchdog needs a trigger signal
from PTRIG or NTRIG to avoid resets at NRES.
A falling edge at EN while TXD is high switches the IC into Silent mode. The TXD signal has to
be logic high during the Mode Select window
independent outputs can be used, or two outputs from the same microcontroller port; in the sec-
ond case, the mode change is only one command. In Silent mode, the transmission path is
disabled. Supply current from V
d
EN = 1
TXD = 1
TXD = 0
EN = 0
EN = 1
EN = 0
VCC: 5V/50 mA with undervoltage
Communication: OFF
EN = 1
24). For debugging your software you can connect pin MODE to 5V and the watch-
monitoring
Pre-normal Mode
Go to silent command
Go to sleep command
Unpowered Mode
Local wake-up event
Local wake-up event
b
V
Batt
= 0
a
Bat
is typically I
c + e
(Figure 3-2 on page
Communication: OFF
VSsi
VCC: switched off
= 40 µA with no load at the VCC regulator.
Sleep Mode
b
c + d + e
®
. In the application it is always con-
a: V
b: V
c: Bus wake-up event
d: NRES switches to low
e: Wake-up from wake-up switch
b
VCC: 5V 7%/50 mA
with undervoltage monitoring
Communication: OFF
S
S
> 5V
< 4V
7). For EN and TXD either two
Silent Mode
4887I–AUTO–09/09
Figure