Datasheet

14
LTC1334
5V
0.33µF
0.33µF
1µF
3
26
5V
1
TXD
RXD
TXD
+
RXD
+
120
2
LTC1323CS-16
LTC1334 • F19
TXD
7
3
4
1k
1k
RXEN
5
6
21
LTC1334
18
R
A1
4
5
10
9
8
13
14
17
DE1
D
Y1
19
5V
5V
20
16
15
120
SEL1, 5V
SEL2, 5V
11
24
6
23
8
16
15
10
14
13
12
11
9
12
25
7
22
28
2
1
27
TXDEN
SHDN
RXDO
1k
1k
CHARGE
PUMP
0.1µF0.1µF
0.1µF
0.1µF
EMI
EMI
EMI
EMI
EMI
EMI
EMI
EMI
100pF 100pF
5 TO
22
5 TO
22
100pF
FERRITE
BEAD
FERRITE
BEAD
= OR OR
EMI
NC
NC
NC
NC
NC
NC
NC
NC
NC
U
S
A
O
PP
L
IC
AT
I
WU
U
I FOR ATIO
Figure 20. AppleTalk Direct Connect Using the LTC1323 DTE and the LTC1334 for DCE Transceivers
5V
0.33µF
0.33µF
1µF
3
26
5V
1
TXD
TXO
TXD
+
RXI
120
2
LTC1323CS
LTC1334 • F20
CPEN
7
3
4
TXDEN
5
6
21
LTC1334
18
R
A1
R
A2
4
5
10
9
8
13
14
17
DE1
D
Y1
D
Y2
D
Z2
19
5V
5V
20
16
15
120
120
120
SEL1
5V
SEL2
11
24
6
23
12
24
23
18
22
21
20
19
17
RXI
16
RXD
15
RXD
+
14
13
12
25
7
22
28
2
1
27
TXD
TXI
SHDN
8
RXEN
9
RXO
10
11
RXO
RXDO
CHARGE
PUMP
0.1µF0.1µF
0.1µF
0.1µF
EMI
EMI
EMI
EMI
EMI
EMI
EMI
EMI
EMI
EMI
EMI
EMI
NC
NC
NC
100pF 100pF
5 TO
22
5 TO
22
100pF
FERRITE
BEAD
FERRITE
BEAD
= OR OR
EMI
EMI
EMI
Figure 19. AppleTalk/LocalTalk Implemented Using the LTC1323CS-16 and LTC1334 Transceivers