Datasheet
13
LT1203/LT1205
+1
+1
+1
+1
U1
LT1205
16
9
10
11
12
13
14
15
C2
0.1µF
1
R1
75Ω
C1
0.1µF
8
7
6
5
4
3
2
+1
+1
+1
+1
U2
LT1205
16
9
10
11
12
13
14
15
1
8
7
6
5
4
3
2
10
9
8
4
11
OUTPUT 2
J7
+1
+1
+1
+1
U3
LT1205
16
U5
74HC04
9
10
11
12
13
14
15
1
8
7
6
5
4
3
2
+1
+1
+1
U4
LT1205
16
9
A
LT1203/05 • F06
10
11
12
13
14
15
1
8
CH3
J4
CH0
J1
7
6
5
4
3
2
R2
75Ω
CH1
J2
R3
75Ω
CH2
J3
GND
B
5V–5V
R13
820Ω
R14
820Ω
C6
4.7µF
R19
75Ω
C5
4.7µF
R7
10k
–
+
R4
75Ω
C4
0.1µF
SELECT LOGIC
OUTPUT 0
AB
SELECT LOGIC
OUTPUT 1
AB
SELECT LOGIC
OUTPUT 2
AB
SELECT LOGIC
OUTPUT 3
C3
0.1µF
+1
A
L
L
H
H
B
L
H
L
H
CH0
CH1
CH2
CH3
SELECT LOGIC
TRUTH TABLE
INPUT
CHANNEL
U6 C
LT1254
12
13
14
OUTPUT 3
J8
R15
820Ω
R16
820Ω
R20
75Ω
R8
10k
–
+
U6 D
LT1254
5
6
7
OUTPUT 1
J6
R11
820Ω
R12
820Ω
R18
75Ω
R6
10k
–
+
U6 B
LT1254
3
2
1
OUTPUT 0
J5
R9
820Ω
R10
820Ω
R17
75Ω
–
+
U6 A
LT1254
+
+
R5
10k
Figure 6. 4 × 4 Crosspoint and Truth Table
U
S
A
O
PP
L
IC
AT
I
WU
U
I FOR ATIO