1

LTC1345

Single Supply

V.35 Transceiver

s

Single Chip Provides All V.35 Differential Clock

and Data Signals

s

Operates From Single 5V Supply

s

Software Selectable DTE or DCE Configuration

s

Transmitters and Receivers Will Withstand

Repeated

±10kV ESD Pulses

s

s

10MBaud Transmission Rate

s

Transmitter Maintains High Impedance When

Disabled, Shut Down, or with Power Off

s

Meets CCITT V.35 Specification

s

Transmitters are Short-Circuit Protected

The LTC

differential clock and data signals for a V.35 interface from

a single 5V supply. Combined with an external resistor

termination network and an LT

for the control signals, the LTC1345 forms a complete low

power DTE or DCE V.35 interface port operating from a

single 5V supply.

The LTC1345 features three current output differential

transmitters, three differential receivers, and a charge

pump. The transceiver can be configured for DTE or DCE

operation or shut down using two Select pins. In the

Shutdown mode, the supply current is reduced to 1

µA.

The transceiver operates up to 10Mbaud. All transmitters

feature short-circuit protection and a Receiver Output

Enable pin allows the receiver outputs to be forced into a

high impedance state. Both transmitter outputs and re-

ceiver inputs feature

±10kV ESD protection. The charge

1

µF capacitors.

s

Modems

s

Telecommunications

s

Data Routers

Clock and Data Signals for V.35 Interface

DCE

DTE

, LTC and LT are registered trademarks of Linear Technology Corporation.

4

1

µF

5V

2

1

1

µF

1

µF1µF

1

µF

28

27

3

6

1

2

26

25

12

12

11

18

17

1

µF

DX

LTC1345

LTC1345

BI

627T500/1250

BI

627T500/1250

BI TECHNOLOGIES

627T500/1250 (SOIC) OR

899TR50/125 (DIP)

28

5V

1

2

1

µF

4

3

27

1

µF

RX

T

TXD (103)

SCTE (113)

TXC (114)

RXC (115)

RXD (104)

GND (102)

T

7

3

4

24

23

10

13

9

16

15

DX

RX

T

T

11

14

13

20

19

1

6

2

26

25

T

T

12

12

11

18

17

10

14

8

9

3

7

4

24

23

T

T

8

13

10

9

16

15

7

5

5

7

5

8

6

22

21

T

T

RX

RX

RX

10

14

LTC1345 • TA01

9

DX

DX

DX

50

Ω

=

125

Ω

T

50

Ω

FEATURES

DESCRIPTIO

APPLICATIO S

TYPICAL APPLICATIO