56

DS261DB2

CDB61584A

Dual Line Interface Unit

RCLK1

RPOS1

RNEG1

TCLK1

TPOS1

TNEG1

LOS1

J-TDO

DGND2

J-TDI

TTIP1

TV+1

TGND1

TRING1

PD1

ATTEN0

10

11

12

13

14

15

RCLK1

RPOS1

RNEG1

TCLK1

TPOS

TNEG

3

5

7

4

6

8

17

15

13

16

14

12

U2

U2

U2

U2

U2

U2

2

4

1

3

J7

R26

47K

1

R6

470

D1

LED

AIS1

1

R7

470

D2

LED

LOS1

VA+

2

2

VA+

3

3

Q1

Q2

J-TDO

VD+

J-TDI

C3

.1

µF

PD1

ATTEN0

16

17

18

19

20

21

22

23

24

25

C1

C2

.47

µF

VD+

VD+

2

6

1

5

3

T1

1

T

R

J8A

J31

J32

TTIP1

TRING1

J9

2

6

1

5

3

T2

6

9

T

R

J8B

J33

J34

RTIP1

RRING1

C4

R4

R3

C9

.1

µF

VCC

20

10

U2

1

19

GND

U7

CS61584A

CHANNEL 1

J1

J2

J3

J4

J5

J6

R29

R30

R31

C26

C27

C28

C29

C30

C31

R5

R38

R39

L4

VA+

26 N/C-1

R8

R9

R24

R25

.47

µF

1.15:1

PE -65388

1.15:1

PE -65388

TV+1

Notes: Components R3, R4, and C1 are socketed to permit value changes

to the application.

Component locations R1, R2, R8, R9, R24, R25, and D10-D13 provide

areas for evaluating protection circuitry.

51.1

51.1

51.1

100pF

100pF

100pF

100pF

100pF

100pF

(RDATA1)

(BPV1)

(TDATA1)

ENA

ENA

51.1

51.1

51.1

4

R1

R2

D13

D12

D11

D10

Figure 1. Channel 1 Circuitry