ATA6662C-TAQY Atmel, ATA6662C-TAQY Datasheet - Page 7

• Manufacturer Part Number: ATA6662C-TAQY
• Description: TXRX LIN 2.1 3.3V/5V SO8
• Manufacturer: Atmel
• Type: Transceiverr

Specifications of ATA6662C-TAQY

• Number Of Drivers/receivers: 1/1
• Protocol: LIN
• Voltage - Supply: 5 V ~ 27 V
• Mounting Type: Surface Mount
• Package / Case: 8-SOIC (0.154", 3.90mm Width)
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

3.13
Figure 3-3.
3.14
4916O–AUTO–05/10
Wake-up Source Recognition
Local Wake-up via Pin WAKE
Wake pin
Wake-up from Wake-up Switch
regulator
Voltage
RXD
TXD
INH
EN
A falling edge at pin WAKE, followed by a low level maintained for a certain time period (t
results in a local wake-up request. The wake-up time (t
ing to ISO7637, creates a wake-up. The device switches to Fail-safe Mode. Pin INH is activated
(switches to V
is indicated by a low level at pin RXD to interrupt the microcontroller and a strong pull-down at
pin TXD (see
voltage with an output current of typical –3 µA. Even in the case of a continuous low at pin
WAKE it is possible to switch the IC into Sleep Mode via a low at pin EN. The IC will stay in
Sleep Mode for an unlimited time. To generate a new wake up at pin WAKE it needs first a high
signal > 6 µs before a negative edge starts the wake-up filtering time again.
The device can distinguish between a local wake-up request (pin WAKE) and a remote wake-up
request (LIN bus). The wake-up source can be read on pin TXD in Fail-safe Mode. If an external
pull-up resistor (typically 5 k ) has been added on pin TXD to the power supply of the microcon-
troller, a high level indicates a remote wake-up request (weak pull-down at pin TXD) and a low
level indicates a local wake-up request (strong pull-down at pin TXD).
The wake-up request flag (signalled on pin RXD) as well as the wake-up source flag (signalled
on pin TXD) are reset immediately if the microcontroller sets pin EN to high (see
page 6
TXD weak pull-down resistor
and
Node in sleep state
High or floating
Low or floating
Figure 3-3 on page
Off state
Figure on page
S
) and the internal termination resistor is switched on. The local wake-up request
Wake filtering time
State change
t
WAKE
9). The voltage threshold for a wake-up signal is 3V below the VS
7).
Regulator wake-up time delay
Microcontroller start-up
TXD strong pull-down
delay time
On state
High
Low
WAKE
) ensures that no transient, accord-
pull-down
operation
EN High
Node in
High
Weak
ATA6662
Figure 3-2 on
WAKE
),
7