LTC1334 Datasheet, PDF (14/16 Pages) Linear Technology – Single 5V RS232/RS485 Multiprotocol Transceiver

LTC1334
APPLICATI S I FOR ATIO
1
0.33µF
2
3
TXD
TXDEN ⁴
5
SHDN
6
RXEN
RXDO ⁷
8
LTC1323CS-16
CHARGE
PUMP
16 _5V
15
14
0.33µF
1µF
13
12 TXD^–
EMI
11 TXD⁺
EMI
10 RXD^–
EMI
9 RXD⁺
EMI
1k
1k
120Ω
5Ω TO 5Ω TO
22Ω 22Ω
EMI =
OR
100pF
OR
100pF
120Ω
FERRITE
BEAD
1
0.1µF
2
0.1µF
1k
3
EMI ⁴
5
EMI
EMI ⁶
1k
EMI ⁷
SEL1, 5V ⁸
SEL2, 5V ⁹
FERRITE
BEAD
NC ¹⁰
100pF
11
NC
NC ¹²
13
NC
14
LTC1334
28
27
0.1µF
26 _5V
25
NC
24 _RA1
23 _DE1
22 _DY1
21 _5V
20
5V
19 _NC
18
NC
17
NC
16 _NC
15
0.1µF
LTC1334 • F19
Figure 19. AppleTalk/LocalTalk Implemented Using the LTC1323CS-16 and LTC1334 Transceivers
1
0.33µF
2
CPEN ³
TXD ⁴
TXI ⁵
6
TXDEN
SHDN ⁷
RXEN ⁸
RXO ⁹
RXO ¹⁰
RXDO ¹¹
12
LTC1323CS
CHARGE
PUMP
5Ω TO 5Ω TO
22Ω 22Ω
EMI =
OR
24 _5V
23
100pF
22
0.33µF
1µF
21
20 TXD^–
EMI
19 TXD⁺
EMI
18 TXO
EMI
120Ω
17 RXI
EMI
16 RXI
EMI
15 RXD^– _EMI
14 RXD⁺ _EMI
13
120Ω
OR
100pF
FERRITE
BEAD
FERRITE
BEAD
100pF
1
0.1µF
2
3
0.1µF
EMI ⁴
120Ω
5
EMI
EMI ⁶
120Ω
EMI ⁷
SEL2
SEL1 ⁸
5V ₉
10
EMI
11
EMI
12
NC
13
EMI
14
LTC1334
28
27
26 _5V
0.1µF
25 _NC
24 _RA1
23 _DE1
22
D_Y1
21 _5V
20
5V
19 _DY2
18 _DZ2
17
R_A2
16 _NC
15
0.1µF
LTC1334 • F20
Figure 20. AppleTalk Direct Connect Using the LTC1323 DTE and the LTC1334 for DCE Transceivers
14