TLE7232GS datasheet(11/32 Pages) INFINEON

11 / 32 page

Data Sheet

Rev. 1.0, 2007-12-18

SPI Driver for Enhanced Relay Control

SPIDER - TLE7232GS

Block Description and Electrical Characteristics

5.1

Power Stages

The SPIDER - TLE7232GS is an eight channel low-side relay switch. The power stages are built by N-channel

vertical power MOSFET transistors.

5.1.1

Power Supply

The SPIDER - TLE7232GS is supplied by power supply line

DD which is used for the digital as well as the analog

functions of the device including the gate control of the power stages. There is a power-on reset function

implemented for the supply line. After start-up of the power supply, all SPI registers are reset to their default

values. A capacitor at pins

DD to GND is recommended.

The pin

SO is the supply pin of the digital output buffer at pin SO.

SO can therefore be used to vary the high state output voltage of the SO pin, in order to be compatible to 3.3 V

and 5 V microcontrollers. If

SO supply voltage is missing the device is fully functional, only the SO pin has no

output.

There is a reset pin available. At low level at this pin, all registers are set to their default values and the quiescent

supply current is minimized.

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