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MGK717

LN

SWI3

GND

SWI1

EHI

SWI2

222

20

19

21

11

DATA

12

EN

13

CLK

14

RXI

10

RXO

8

LCC

CST

REG

LVI

67

4

3

AGC

9

RGL

5

LSPGND

123

TXI

+

18

TXI

−

17

VCC

ICC

25

AXI

15

DLC

28

AXO

16

LSAI2

27

LSAI1

26

LSAO

24

from

microcontroller

UBA1707

CRXI

220 nF

VRXI

CLVI

470 pF

Cline

100

µF

CEMC

10 nF

CREG

4.7

µF

CLSAO

220

µF

RLVI

1 M

Ω

RRGL

7.15 k

Ω

SLPE

RSLPE

10

Ω

RLSAO

16

Ω

ZSET

619

Ω

Zline

600

Ω

CAXI

CDLC

1

µF

CLSAI2

220 nF

220 nF

CCST

22 pF

CLSAI1

VAXI

VLSAI2

VLSAI1

220 nF

TNON-HOOK

MPSA42

TPDARL

MPSA92

100 k

Ω

RON-HOOK

DPROT

1N4148

RPLD

20 k

Ω

DSW

1N4148

TNSW

BUX86

VVCC

VLN

Iline

VTXI

CVCC

10

µF

CLCC

6.8 pF

Fig.17 Test circuit.