Rainbow Electronics ATA6626 - Manual

1. Introduction
The development board for the ATA6621/22/24 (ATA6621-EK, ATA6622-EK,
ATA6624-EK) is designed to give designers a quick start with the ICs and for prototyp-
ing and testing of new LIN designs.
The ATA6621, ATA6622 and ATA6624 are system basis chips (SBCs) with fully inte-
grated LIN transceiver according to the LIN specification 2.0, window watchdog with
adjustable trigger times and low-drop voltage regulator providing 5V/50 mA
(3.3V/50 mA for the ATA6622). The output current of the regulator can be boosted by
using an external NPN transistor.
The ATA6622 and the ATA6624 are totally pin- and function-compatible, the only dif-
ference between these circuits is the regulator’s output voltage.
The ATA6621 differs in a few more ways—an initial overview of these differences
starts with the different pins listed in
Table 1-1 :
Figure 1-1. ATA6621/22/24 Development Board
Table 1-1. Overview of Pin Differences
Pin No. ATA6621 ATA6622 ATA6624
2 PTRIG GND GND
6 Not connected GND GND
8 Not connected GND GND
10 Not connected INH INH
16 GND KL_15 KL_15
17 TEMP GND GND
ATA6621/22/24
Development
Board
Application Note
4970A–AUTO–01/07