LTC1045
TYPICAL APPLICATIONS
U
Logic Ground Isolation when Two Grounds are within LTC1045 Common Mode Range
SYSTEM A
SYSTEM B
V
= 5V
CC B
V
V
= 5V
CC A
+
V
OH
THREE-
STATE
BUFFER
TTL/CMOS LOGIC
IN
+
–
LOGIC
OUT
2.7k
1k
COMP
LATCH
OUT
V
V
= 1.35V
TRIP
TRIP
–
I
V
DIS
V
SET
OL
SETS LOGIC
THRESHOLD REFERRED
TO GND A
GND A
GND B
–
V
= –5V
1045 TA08
–
(GND B – V + V
) ≤ GND A ≤ (GND B + V
– 2V – V
)
TRIP
TRIP
CC B
Coax Cable Driver/Receiver
5V
5V
20
+
V
XMT IN
1
TTL IN
1.4V
+
20
30-FT RG 174
COAX CABLE
V
+
OH
V
+
XMT OUT
RCV IN
V
1
OL
V
OH
DIS
13
11
RCV OUT
50Ω
I
V
OL
TTL OUT
SET
–
–
DIS
13
11
V
12
50pF
I
10
0.2V
SET
–
–
V
12
10
1045 TA10
RCV OUT (5V/DIV)
RCV IN (1V/DIV)
XMT OUT (1V/DIV)
XMT IN (5V/DIV)
200ns/DIV
1045 TA10a
1045fc
10
Linear [ Linear ]
