ATA6622C-PGQW-1 Microchip

ATA6622C/ATA6624C/ATA6626C LIN Bus Transceiver with 3.3V (5V) Regulator and Watchdog DATASHEET Features Master and slave operation possible Supply voltage up to 40V Operating voltage V = 5V to 27V S Typically 10A supply current during Sleep Mode Typically 57A supply current in Silent Mode Linear low-drop voltage regulator, 85mA current capability: Normal, Fail-safe, and Silent Mode Atmel ATA6622C VCC = 3.3V 2% Atmel ATA6624C VCC = 5.0V 2% Atmel ATA6626C VCC = 5.0V 2%, TXD time-out timer disabled In Sleep Mode VCC is switched off VCC- undervoltage detection (4ms 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, 2.1 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 Atmel ATA6626C: 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 Fulfills the OEM Hardware Requirements for LIN in automotive Applications Rev.1.0 Interference and damage protection according to ISO7637 Qualified according to AEC-Q100 Package: QFN 5mm x 5mm with 20 pins (Moisture Sensitivity Level 1) 4986O-AUTO-10/141. Description The Atmel ATA6622C is a fully integrated LIN transceiver, which complies with the LIN 2.0, 2.1 and SAEJ2602-2 specifications. It has a low-drop voltage regulator for 3.3V/85mA output and a window watchdog. The Atmel ATA6624C has the same functionality as the Atmel ATA6622C however, it uses a 5V/85mA regulator. The Atmel ATA6626C has the same functionality as Atmel ATA6624C without a TXD time-out timer. The voltage regulator is able to source 85mA, but the output current 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. Atmel ATA6622C/ATA6624C/ATA6626C are designed to handle the low-speed data communication in vehicles, e.g., in convenience electronics. Improved slope control at the LIN- driver ensures secure data communication up to 20kBaud. Sleep Mode and Silent Mode guarantee very low current consumption. The Atmel ATA6626C is able to switch the LIN unlimited to dominant level via TXD for low data rates. Figure 1-1. Block Diagram 20 VS Normal and Fail-safe 10 Mode INH PVCC Normal Receiver Mode - 9 RXD + 7 RF Filter LIN 4 WAKE 16 Edge Wake-up KL 15 Detection Bus Timer PVCC Short Circuit and Overtemperature Protection Slew Rate Control TXD 11 Time-out TXD Timer *) 19 Normal/Silent/ VCC Fail-safe Mode 18 3.3/5V PVCC Control Unit 12 1 Undervoltage EN NRES Reset OUT Adjustable 13 Internal Testing Watchdog Watchdog WD OSC Unit 5 Oscillator GND PVCC 15 14 3 MODE TM NTRIG *) Not in ATA6626 2 ATA6622C/ATA6624C/ATA6626C DATASHEET 4986OAUTO10/14