ST7538 データシートの表示（PDF） - STMicroelectronics

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ST7538

FSK POWER LINE TRANSCEIVER

STMicroelectronics 

ST7538

Table 2. Pin Description (continued)

N°

Name

Type

Description

13

TEST 3 Digital/Input

Test Input. Must be connected to DVss during Normal Operation

with internal pull-down

14

WD Digital/Input

Watchdog input. The Internal Watchdog Counter is cleared on the

with internal pull-up falling edges.

15 ZCOUT Digital/Output

Zero Crossing Detection Output

16

ZCIN1 Analog/Input

Zero Crossing AC Input.

17

NC Floating

Must be connected to DVss.

18

DVss Supply

Digital Ground

19

ATOP1 Power/Output

Power Line Driver Output

20

PAVss Supply

Power Analog Ground

21

ATOP2 Power/Output

Power Line Driver Output

22

PAVCC Supply

Power Supply Voltage

23

CL2

Analog/Input

Current Limiting Feedback.

A resistor between CL and AVss sets the PLI Current Limiting Value

) 24

ATO Analog/Output

Small Signal Analog Transmit Output

t(s 25

SGND Supply

Analog Signal Ground

c 26

XOUT Analog I/O

Crystal Output- External Clock Input

u 27

XIN Analog Input

Crystal Oscillator Input

rod 28

AVdd Supply

Analog Power supply.

P 29 Vsense3 Analog/Input

Output Voltage Sensing input for the voltage control loop

te 30

TEST2 Analog/Input

Test Input must be connected SGND

le 31

RxFO Analog/Output

Receiving Filter Output

o 32

RAI Analog/Input

Receiving Analog Input

s 33

VDC Power

5V Voltage Regulator Output

b 34

NC floating

Must Be connected to DVss.

- O 35

TEST1 Digital/Input

Test input. Must Be connected to DVss.

with internal pull-down

ct(s) 36 REGOK Digital/Output

Security checksum logic output

"1" - Stored data Corrupted

"0" - Stored data OK

du 37 C_MINUS4 Analog/Input

Op-amp Inverting Input.

ro 38 C_PLUS5 Analog/Input

Op-amp Not Inverting Input.

P 39

NC floating

Must Be connected to DVss

te 40

C_OUT Analog/Output

Op-amp Output

le 41

GND Supply

Substrate Ground (same function as PIN 6)

Obso 42

PG Digital/Output

Power Good logic Output

"1" - VDC is above 4.5V

"0" - VDC is below 4.25V

43 REG_DATA Digital/Input

Mains or Control Register Access Selector

with internal pull-down "1" - Control Register Access

"0" - Mains Access

44

NC floating

Must be connected to DVss.

<1> If not used this pin must be connected to VDC

<2> Cannot be left floating

<3> Cannot be left floating

<4> If not used this pin must be connected to VDC

<5> If not used this pin must be tied low (SGND or PAVss or DVss)

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