STLC5445

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12

*EREL1A

Logic input pin: relay 1A output driver’s ON/OFF (high = ON)

13

*EREL1B

Logic input pin: relay 1B output driver’s ON/OFF (high = ON)

14

REL1B

Output of the 1B relay driver

15

ALE

Logic input pin: with PSC = 0, Don’t care

with PSC = 1, Address Latch Enable (active high)

16

PBIT

Power on sequencer enable: PBIT = 0: power on sequencer ON

PBIT = 1: power on sequencer OFF

17

PSC

Parallel or MPI mode input selection pin:

0 = parallel interface; 1 = MPI interface

18

INTN

Logic output pin; open drain: with PSC = 0 high impedance

with PSC = 1 interrupt (active low)

21

WA1

Output feeder’s switch side of line 1; negative respect to WB1

23

VCC

Positive supply voltage. It is referred to DGND

24

WBP1

Internal protection diodes for line 1

25

WB1

Output feeder’s resistive side of line 1; positive respect to WA1

28

WB2

Output feeder’s resistive side of line 2; positive respect to WA2

29

WBP2

Internal protection diodes for line 2

30

DGND

Digital ground

31

WA2

Output feeder’s switch side of line 2; negative respect to WB2

33

CODC2

Pin for connection of the external capacitor (100nF/6.3V) to GND for COD signal filtering on

channel 2

34

CODC3

Pin for connection of the external capacitor (100nF/6.3V) to GND for COD signal filtering on

channel 3

36

*ES0(A0)

Logic input pin: with PSC = 0, Line 0 ON/OFF request (high=ON)

with PSC = 1, Address bit for R/W operations

37

*ES1(CSN)

Logic input pin: with PSC = 0, Line 1 ON/OFF request (high=ON)

with PSC = 1, chip select (active low)

38

*ES2(RDN)

Logic input pin: with PSC = 0, Line 2 ON/OFF request (high=ON)

with PSC = 1, Read command (active low)

39

*ES3(WRN)

Logic input pin: with PSC = 0, Line 3 ON/OFF request (high=ON)

with PSC = 1, Write command (active low)

40

REL2A

Output of the 2A relay driver

41

*EREL2A

Logic input pin: relay 2A output driver’s ON/OFF (high = ON)

42

*ERL2B

Logic input pin: relay 2B output driver’s ON/OFF (high = ON)

43

REL2B

Output of the 2B relay driver

44

REL3A

Output of the 3A relay driver

N°

Pin Name

Description

PIN FUNCTION (continued)