SPI Driver for Enhanced Relay Control

SPIDER - TLE7233EM

Power Supply

Data Sheet

12

Rev. 1.2, 2014-05-09

5

Power Supply

The TLE7233EM is supplied by two power supply lines

V

to be functional at a very wide voltage range. The analog power supply

V

Power-on reset functions have been implemented for both supply lines. After start-up of the power supply, all SPI

registers are reset to their default values and the device remains in idle mode. Capacitors between VDD and GND

pins, and VDDA and GND pins are recommended.

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

supply currents are minimized.

The

V

related to this supply voltage. A capacitor between VDD and and GND pin is recommended.

To enable the Daisy chain functionality it is necessary to have

V

The device provides a sleep mode to minimize current consumption, which also resets the register banks. It is

controlled by a low active reset pin (RST) which disables the device and minimize the current consumption. The

table below gives an overview of the different power modes.

Table 2

1) low: pin input is digital low,

high: pin input is digital high,

X: pin state don’t care,

ON: voltage on this analog supply pin is in the specified functional range

Power mode State Description

RST

(low active)

V

DD

V

DDA

SCLK

LHI

SLEEP

Device at minimum current consumption

low

X

X

0 Hz

low

IDLE

Device operational, all channels OFF no

diagnosis activated

high

ON

ON

0 Hz

low

LIMP HOME Device in Limp home mode

X

X

ON

X

high

ON

Device operational with enabled channels and

diagnostic currents active

high

ON

ON

5 MHz

(max)

low