LTC1344A Просмотр технического описания (PDF) - Linear Technology
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LTC1344A Datasheet PDF : 12 Pages
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LTC1344A
TYPICAL APPLICATIO
Figure 13 shows a typical application for the LTC1344A
using the LTC1543 mixed mode transceiver chip to gener-
ate the clock and data signals for a serial interface. The
LTC1344A VEE supply is generated from the LTC1543
charge pump and the select lines M0, M1, M2 and
DCE/DTE are shared by both chips. Each driver output and
receiver input is connected to one of the LTC1344A
termination ports. Each electrical protocol can then be
chosen using the digital select lines.
M0
M1
M2
DCE/DTE
1
M0
24
M1
23
M2
LTC1344A
22
DCE/DTE
21
LATCH
VCC VEE
14
2
C1
1µF
11
12
13
14
4
26
LTC1543
M0
M1
M2
DCE/DTE
24
5
23
22
6
21
C2
3.3µF
100pF
100pF
100pF
3
8
11 12
13
5 4 6 7 9 10 16 15 18 17 19 20
DTE
TXD+
DCE
RXD+
TXD–
SCTE +
RXD–
RXC+
SCTE – RXC –
7
20
8
19
18
9
17
16
10
15
TXC +
TXC –
RXC +
RXC –
RXD+
RXD–
TXC+
TXC –
SCTE+
SCTE–
TXD+
TXD–
1344 F13
Figure 13. Typical Application Using the LTC1344A
RELATED PARTS
PART NUMBER
LTC1334
LTC1343
LTC1345
LTC1346A
LTC1543
LTC1544
DESCRIPTION
Single Supply RS232/RS485 Transceiver
Multiprotocol Serial Transceiver
Single Supply V.35 Transceiver
Dual Supply V.35 Transceiver
Multiprotocol Serial Transceiver
Multiprotocol Serial Transceiver
12 Linear Technology Corporation
1630 McCarthy Blvd., Milpitas, CA 95035-7417
(408)432-1900 q FAX:(408)434-0507 q www.linear-tech.com
COMMENTS
2 RS485 Dr/Rx or 4 RS232 Dr/Rx Pairs
Software Selectable Mulitprotocol Interface
3 Dr/3 Rx for Data and CLK Signals
3 Dr/3 Rx for Data and CLK Signals
Software-Selectable Transceiver for Data and CLK Signals
Software-Selectable Transceiver for Control Signals
1344af, sn1344a LT/TP 0898 4K • PRINTED IN USA
© LINEAR TECHNOLOGY CORPORATION 1998
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