LTC1346A
10Mbps DCE/DTE
V.35 Transceiver
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FEATURES
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DESCRIPTIO
Single Chip Provides Complete Differential Signal
Interface for V.35 Port
Drivers and Receivers Will Withstand Repeated
±10kV ESD Pulses
Operates from ±5V Supplies
10Mbaud Transmission Rate
Meets CCITT V.35 Specification
Shutdown Mode Reduces ICC to Below 1µA
Selectable Transmitter and Receiver Configurations
Independent Driver/Receiver Enables
Transmitter Maintains High Impedance When
Disabled, Shut Down or with Power Off
Transmitters Are Short-Circuit Protected
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APPLICATIO S
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Modems
Telecommunications
Data Routers
The LTC®1346A is a single chip transceiver that provides
the differential clock and data signals for a V.35 interface
from ±5V supplies. Combined with an external resistor
termination network and an LT ®1134A RS232 transceiver
for the control signals, the LTC1346A forms a complete low
power DTE or DCE V.35 interface port.
The LTC1346A features three current output differential
transmitters and three differential receivers. The transceiver
can be configured for DTE or DCE operation or shutdown
using three Select pins. In the Shutdown mode, the supply
current is reduced to below 1µA.
The LTC1346A transceiver operates up to 10Mbaud. All
transmitters feature short-circuit protection. Both the
transmitter outputs and the receiver outputs can be forced
into a high impedance state. The transmitter outputs and
receiver inputs feature ±10kV ESD protection.
, LTC and LT are registered trademarks of Linear Technology Corporation.
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TYPICAL APPLICATIO
Clock and Data Signals for V.35 Interface
1
DTE
DCE
1
2
2
VCC1
5V
0.1mF
LTC1346A
BI
627T500/1250
24
5
23
DX
2
3
21
DX
TXD (103)
1
22
4
4
RX
RX
17 13
T
15 11
T
RXD (104)
RX
7
VCC1
8
13
3
12
T
9
8
T
7
GND (102)
8
22
21
5
RXC (115)
23
4
T
24
3
T
13
2
TXC (114)
14 10
11
9
T
14
1
T
16 12
10
10
SCTE (113)
15
20
6
7
0.1mF
VEE2
0.1mF –5V
16
11
T
+
LTC1346A
12
T
18 14
9
BI
627T500/1250
VCC2
5V
+
+
VEE1
– 5V +
0.1mF
19
10
RX
11
RX
DX
DX
DX
4
5
7
3
8
12
50W
6
T
VCC2
=
125W
50W
BI TECHNOLOGIES
627T500/1250 (SOIC)
LTC1346 • TA01
1346afa
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