10

LTC1045

RCV OUT (5V/DIV)

RCV IN (1V/DIV)

XMT OUT (1V/DIV)

XMT IN (5V/DIV)

Logic Ground Isolation when Two Grounds are within LTC1045 Common Mode Range

–

+

LATCH

COMP

SYSTEM B

SYSTEM A

SETS LOGIC

THRESHOLD REFERRED

TO GND A

2.7k

LOGIC

OUT

GND B

1045 TA08

THREE-

STATE

BUFFER

TTL/CMOS LOGIC

1k

GND A

DIS

IN

OUT

200ns/DIV

1045 TA10a

–

+

20

5V

11

1

TTL IN

1.4V

0.2V

XMT IN

XMT OUT

30-FT RG 174

COAX CABLE

50

Ω

13

12

10

DIS

RCV IN

1

RCV OUT

TTL OUT

1045 TA10

–

+

20

5V

11

13

12

10

DIS

50pF

Coax Cable Driver/Receiver