Rainbow Electronics ATA6624 - Manual

Features
• Master and Slave Operation Possible
• Supply Voltage up to 40V
• Operating voltage V
S
= 5V to 27V
• Typically 10 µA Supply Current During Sleep Mode
• Typically 57 µA Supply Current in Silent Mode
• Linear Low-drop Voltage Regulator:
– Normal, Fail-safe, and Silent Mode
– ATA6622 V
CC
= 3.3V ±2%
– ATA6624 V
CC
= 5.0V ±2%
– ATA6626 V
CC
= 5.0V ±2%, TXD Time-out Timer Disabled
– In Sleep Mode V
CC
is Switched Off
• VCC- Undervoltage Detection (4 ms Reset Time) and Watchdog Reset Logical
Combined at Open Drain Output NRES
• Negative Trigger Input for Watchdog
• Boosting the Voltage Regulator Possible with an External NPN Transistor
• LIN Physical Layer According to LIN 2.0 Specification and SAEJ2602-2
• Wake-up Capability via LIN-bus, Wake Pin, or Kl_15 Pin
• INH Output to Control an External Voltage Regulator or to Switch off the Master Pull Up
Resistor
• TXD Time-out Timer; ATA6626 TXD Time-out Timer Is Disabled
• Bus Pin is Overtemperature and Short Circuit Protected versus GND and Battery
• Adjustable Watchdog Time via External Resistor
• Advanced EMC and ESD Performance
• ESD HBM 8 kV at Pins LIN and VS According to STM5.1
• Package: QFN 5 mm
×
5 mm with 20 Pins
1. Description
The ATA6622 is a fully integrated LIN transceiver, which complies with the LIN 2.0
and SAEJ2602-2 specifications. It has a low-drop voltage regulator for 3.3V/50 mA
output and a window watchdog. The ATA6624 has the same functionality as the
ATA6622; however, it uses a 5V/50 mA regulator. The ATA6626 has the same func-
tionality as ATA6624 without a TXD time-out timer. The voltage regulator is able to
source 50 mA up to V
S
= 18V. The output current of the regulator can be boosted by
using an external NPN transistor. This chip combination makes it possible to develop
inexpensive, simple, yet powerful slave and master nodes for LIN-bus systems.
ATA6622/ATA6624/ATA6626 are designed to handle the low-speed data communica-
tion in vehicles, e.g., in convenience electronics. Improved slope control at the
LIN-driver ensures secure data communication up to 20 kBaud. Sleep Mode and
Silent Mode guarantee very low current consumption. The ATA6626 is able to switch
the LIN unlimited to dominant level via TXD for low data rates.
LIN Bus
Transceiver
with 3.3V (5V)
Regulator and
Watchdog
ATA6622
ATA6624
ATA6626
4986F–AUTO–07/08