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PDF ATA6629 Data sheet ( Hoja de datos )
| Número de pieza | ATA6629 | |
| Descripción | LIN Bus Transceiver | |
| Fabricantes | ATMEL Corporation | |
| Logotipo |  |
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Features
• Supply Voltage up to 40V
• Operating Voltage VS = 5V to 27V
• Typically 10 µA Supply Current During Sleep Mode
• Typically 40 µA Supply Current in Silent Mode
• Linear Low-drop Voltage Regulator:
– Normal, Fail-safe, and Silent Mode
– ATA6629: VCC = 3.3V ±2%
– ATA6631: VCC = 5.0V ±2%
– Sleep Mode: VCC is Switched Off
• VCC Undervoltage Detection with Reset Open Drain Output NRES (4 ms Reset Time)
• Voltage Regulator is Short-circuit and Over-temperature Protected
• LIN Physical Layer According to LIN 2.0, 2.1 and SAEJ2602-2
• Wake-up Capability via LIN Bus (90 µs Dominant)
• TXD Time-out Timer
• Bus Pin is Overtemperature and Short-circuit Protected versus GND and Battery
• Advanced EMC and ESD Performance
• Fulfills the OEM “Hardware Requirements for LIN in Automotive Applications Rev.1.1”
• Interference and Damage Protection According to ISO7637
• Package: SO8
1. Description
ATA6629/ATA6631 is a fully integrated LIN transceiver, designed according to the LIN
specification 2.0, 2.1 and SAEJ2602-2, with a low-drop voltage regulator
(3.3V/5V/50 mA). The combination of voltage regulator and bus transceiver makes it
possible to develop simple, but powerful, slave nodes in LIN Bus systems.
ATA6629/ATA6631 is designed to handle the low-speed data communication in
vehicles (for example, in convenience electronics). Improved slope control at the LIN
driver ensures secure data communication up to 20 kBaud with an RC oscillator for
the protocol handling. The bus output is designed to withstand high voltage. Sleep
Mode (voltage regulator switched off) and Silent Mode (communication off; VCC
voltage on) guarantee minimized current consumption.
LIN Bus
Transceiver
with Integrated
Voltage
Regulator
ATA6629
ATA6631
www.DataSheet4U.com
9165B–AUTO–05/10
1 page  
ATA6629/ATA6631
4. Mode of Operation
Figure 4-1. Mode of Operation
Unpowered Mode
(See section 4.5)
ba
a: VS > VSthF
b: VS < VSthU
c: Bus wake-up event
d: NRES switches to low
b
d
Fail-safe Mode
VCC: 3.3V/5V/50 mA
with undervoltage monitoring
Communication: OFF
c+d
b
EN = 1
Normal Mode
VCC: 3.3V/5V/50 mA
with undervoltage
monitoring
Communication: ON
EN = 0
TXD = 1
EN = 1
EN = 0
TXD = 0
Go to silent command
Local wake-up event
Go to sleep command
EN = 1
c
b
Silent Mode
VCC: 3.3V/5V/50 mA
with undervoltage monitoring
Communication: OFF
Sleep Mode
VCC: switched off
Communication: OFF
Table 4-1. Mode of Operation
Mode of Operation
Transceiver
Fail safe
OFF
Normal
ON
Silent
OFF
Sleep
OFF
VCC
3.3V/5V
3.3V/5V
3.3V/5V
0V
LIN
Recessive
TXD depending
Recessive
Recessive
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9165B–AUTO–05/10
5
5 Page 
ATA6629/ATA6631
Figure 4-7. Short Circuit to GND on the LIN bus During Sleep- or Silent Mode
LIN BUS
VLINL
VBUSdom
IVS
IVSsleep/silent
LIN Pre-wake
LIN dominant state
tmon
tmon
IVSfail
IVSsleep/silent
+ ILINwake
Mode of
operation Sleep/Silent Mode
Int. Pull-up
Resistor
RLIN
Wake-up Detection Phase Sleep/Silent
Mode
off (disabled)
Fail-Safe Mode
on (enabled)
4.5 Fail-safe Mode
The device automatically switches to Fail-safe Mode at system power-up. The voltage regulator
is switched on (VCC = 3.3V/5V/2%/50 mA) (see Figure 6-1 on page 14). The NRES output
switches to low for tres = 4 ms and gives a reset to the microcontroller. LIN communication is
switched off. The IC stays in this mode until EN is switched to high. The IC then changes to
Normal Mode. A power down of VBatt (VS < VSth) during Silent or Sleep Mode switches the IC
into Fail-safe Mode after power up. A low at NRES switches the IC into Fail-safe Mode directly.
During Fail-safe Mode the TXD pin is an output and signals the fail-safe source.
The LIN SBC can operate in different Modes, like Normal, Silent or Sleep Mode. The functional-
ity of these Modes is described in Table 4-2.
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Table 4-2. TXD, RXD Depending from Operation Modes
Different Modes
TXD
RXD
Fail-safe Mode
Signalling fail-safe sources (see Table 4-3)
Normal Mode
Follows data transmission
Silent and Sleep Mode
High
High
9165B–AUTO–05/10
11
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| Páginas | Total 26 Páginas | |
| PDF Descargar | [ Datasheet ATA6629.PDF ] | |
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