ATA6621-PGQW Atmel, ATA6621-PGQW Datasheet - Page 10

• Manufacturer Part Number: ATA6621-PGQW
• Description: IC TXRX LIN BUS 5V/50MA 20QFN
• Manufacturer: Atmel
• Type: Transceiverr

Specifications of ATA6621-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

Figure 3-5.
3.15.4
3.15.5
10
ATA6621N
Pre-normal Mode
Unpowered Mode
LIN Bus
LIN Wake-up Waveform Diagram from Sleep Mode
NRES
VCC
RXD
TXD
EN
At system power-up the device automatically switches to Pre-normal mode. The voltage regula-
tor is switched on V
to low for t
off and the watchdog is active. The ATA6621N stays in this mode until EN is switched to high.
If V
Pre-normal mode. During this mode the TXD pin is an output.
If you connect battery voltage to the application circuit, the voltage at the VS pin increases due
to the block capacitor (see
voltage threshold V
V
and the load.
The NRES is low for the reset time delay t
CC
Battery
output voltage reaches its nominal value after t
Bus wake-up filtering time
Low or floating
(V
Node in sleep mode
Low or floating
res
S
Off state
< 4V) is powered down during Silent mode or Sleep mode, the IC powers up into
= 10 ms and sends a reset to the microcontroller. LIN communication is switched
VLIN < 0.4 V
t
bus
CC
S_th
= 5V ±2%/50 mA (see
, the IC mode changes from Unpowered mode to Pre-normal mode. The
S
Regulator wake-up time
Figure 3-7 on page
Reset
time
reset
Figure 3-7 on page
. During this time, no mode change is possible.
13). When V
Pre-normal Mode
Microcontroller start-up
On state
VCC
Low
time delay
. This time depends on the V
S
becomes higher than the V
13). The NRES output switches
EN High
Normal Mode
4887I–AUTO–09/09
CC
capacitor
S
under-