LTC1344 Datasheet, PDF (9/12 Pages) Linear Technology – Software-Selectable Cable Terminator

LTC1344
TYPICAL APPLICATIONS N
Figure 13 shows a typical application for the LTC1344
using the LTC1343 mixed mode transceiver chip to gener-
ate the clock and data signals for a serial interface. The
LTC1344 V_EE supply is generated from the LTC1343
charge pump and the select lines M0, M1, M2, DCE and
LATCH are shared by both chips. Each driver output and
receiver input is connected to one of the LTC1344 termi-
nation ports. Each electrical protocol can then be chosen
using the digital select lines.
M0
M1
M2
DCE/DTE
LATCH
1
M0
24
M1
23
M2
LTC1344
22
DCE/DTE
21
LATCH
VCC V_EE
14
2
5V
C1
1µF
3 8 42
17 ^LTC1343
M0
18 _M1
19 _M2
21 _DCE/DTE
22 _LATCH
38
6
37
36
7
35
34
9
33
32
13
31
30
14
29
28
15
27
C2
3.3µF
100pF
100pF
100pF
3
8
11 12
13
5
46
79
10 16 15 18 17 19 20
DTE
TXD⁺
DCE
RXD⁺
TXD^–
SCTE ⁺
RXD^–
TXC⁺
SCTE ^–
NC
TXC ^–
RXC ⁺
NC
RXC ⁺
RXC ^–
TXC ⁺
TXC ^–
RXD⁺
RXD^–
RXC ^–
NC
NC
SCTE⁺
SCTE ^–
TXD⁺
TXD^–
1344 F13
Figure 13. Typical Application Using the LTC1344
9