LTC1344CG Datasheet LTC1344CG#PBF, LTC1344IG#PBF, LTC1344CG#TRPBF | P10-P12

10

LTC1344

TYPICAL APPLICATIONS N

U

LTC1343

1

2

4

3

8

5

6

7

9

10

39

38

37

36

35

34

33

32

31

30

29

28

27

26

21

19

18

17

12

13

14

15

16

40

23

20

22

11

25

CTRL

LATCH

INVERT

423 SET

DCE

M2

M1

M0

R2

R3

R4

R1

100k

LL A

TXD A

TXD B

SCTE A

SCTE B

TM A

RXD A

RXD B

RXC A

RXC B

RXC A

RXC B

RXD A

RXD B

TM A

RTS A

RTS B

DTR A

DTR B

DCD A

DCD B

DSR A

DSR B

CTS A

CTS B

DCD A

DCD B

DTR A

DTR B

RTS A

RTS B

18

DTE DCE

20 22 23 24 1

M0M1M2

DCE/

DTE

13

121138

C6

100pF

C7

100pF

19171815161097645

2

44

C2

1µF

C4

3.3µF

C10

1µF

C13

3.3µF

C5

1µF

C1

1µF

43

42

41

14

V

EE

V

CC

V

CC

5V

2

14

24

11

15

12

17

9

3

16

25

7

1

4

19

20

23

8

10

6

22

5

13

21

1344 TA02

DB-25 CONNECTOR

LTC1344

C8

100pF

21

R1

C3

1µF

GND

LB

V

CC

V

CC

V

CC

EC

24

LTC1343

1

2

4

3

8

5

6

7

9

10

39

38

37

36

35

34

33

32

31

30

29

28

27

26

21

19

18

17

12

13

14

15

16

40

23

20

22

11

25

CTRL

LATCH

INVERT

423 SET

DCE

M2

M1

M0

R2

R3

R4

R2

100k

44

C12

1µF

C9

1µF

43

42

41

C11

1µF

GND

LB

EC

R1

DTE_LL/DCE_TM

DTE_TXD/DCE_RXD

DTE_SCT/DEC_RXC

DTE_TXC/DCE_TXC

DTE_RXC/DCE_SCTE

DTE_RXD/DCE_TXD

DTE_TM/DCE_LL

DTE_RL/DCE_RL

DTE_RTS/DCE_CTS

DTE_DTR/DCE_DSR

DTE_DCD/DCE_DCD

DTE_DSR/DCE_DTR

DTE_CTS/DCE_RTS

LB

LATCH

DCE/DTE

M2

M1

M0

SGND

SHIELD

RL A

CTS A

CTS B

DSR A

DSR B

RL A

CHARGE

PUMP

CHARGE

PUMP

D1

D2

D3

D4

D1

D2

D3

D4

TXC A

TXC B

SCTE A

SCTE B

TXD A

TXD B

LL A

TXC A

TXC B

24

LATCH

+

Controller Selectable Multiprotocol DTE Port with DB-25 Connector

11

LTC1344

TYPICAL APPLICATIONS N

U

Cable Selectable Multiprotocol DTE Port with DB-25 Connector

LTC1343

1

2

4

3

8

5

6

7

9

10

39

38

37

36

35

34

33

32

31

30

29

28

27

26

21

19

18

17

12

13

14

15

16

40

23

20

22

11

25

CTRL

LATCH

INVERT

423 SET

DCE

M2

M1

M0

R2

R3

R4

R1

100k

TXD A

TXD B

SCTE A

SCTE B

RXD A

RXD B

RXC A

RXC B

RXC A

RXC B

RXD A

RXD B

RTS A

RTS B

DTR A

DTR B

DCD A

DCD B

DSR A

DSR B

CTS A

CTS B

DCD A

DCD B

DTR A

DTR B

RTS A

RTS B

DTE DCE

20 22 23 24 1

M0M1M2

DCE/

DTE

13

121138

C6

100pF

C7

100pF

19171815161097645

2

44

C2

1µF

C4

3.3µF

C10

1µF

C13

3.3µF

C5

1µF

C1

1µF

43

42

41

14

V

EE

V

CC

V

CC

5V

2

14

24

11

15

12

17

9

3

16

7

1

4

19

20

23

8

10

6

22

5

13

25

21

18

1344 TA03

DB-25 CONNECTOR

LTC1344

C8

100pF

R1

C3

1µF

GND

LB

V

CC

V

CC

V

CC

V

CC

V

CC

V

CC

EC

24

LTC1343

1

2

4

3

8

5

6

7

9

10

39

38

37

36

35

34

33

32

31

30

29

28

27

26

21

19

18

17

12

13

14

15

16

40

23

20

22

11

25

CTRL

LATCH

INVERT

423 SET

DCE

M2

M1

M0

R2

R3

R4

R2

100k

44

C12

1µF

C9

1µF

43

42

41

C11

1µF

GND

LB

EC

R1

DTE_TXD/DCE_RXD

DTE_SCTE/DEC_RXC

DTE_TXC/DCE_TXC

DTE_RXC/DCE_SCTE

DTE_RXD/DCE_TXD

DTE_RTS/DCE_CTS

DTE_DTR/DCE_DSR

DTE_DCD/DCE_DCD

DTE_DSR/DCE_DTR

DTE_CTS/ DCE_RTS

LB

SGND

SHIELD

CTS A

CTS B

DSR A

DSR B

CHARGE

PUMP

CHARGE

PUMP

D1

D2

D3

D4

TXC A

TXC B

SCTE A

SCTE B

TXD A

TXD B

TXC A

TXC B

R5

10k

R4

10k

DCE/DTE

M1

M0

V

CC

V

CC

D1

D2

D3

D4

24

R3

10k

V

CC

CABLE WIRING FOR MODE SELECTION

MODE PIN 18 PIN 21

V.35 PIN 7 PIN 7

EIA-530, RS449, NC PIN 7

V.36, X.21

RS232 PIN 7 NC

CABLE WIRING FOR DTE/DCE

SELECTION

MODE PIN 25

DTE PIN 7

DCE NC

21

LATCH

+

Information furnished by Linear Technology Corporation is believed to be accurate and reliable.

However, no responsibility is assumed for its use. Linear Technology Corporation makes no represen-

tation that the interconnection of its circuits as described herein will not infringe on existing patent rights.

12

LTC1344

 LINEAR TECHNOLOGY CORPORATION 1996

1344fa LT/TP 0300 2K REV A • PRINTED IN USA

PACKAGE DESCRIPTION

U

G Package

24-Lead Plastic SSOP (0.209)

(LTC DWG # 05-08-1640)

G24 SSOP 1098

0.13 – 0.22

(0.005 – 0.009)

0

° – 8°

0.55 – 0.95

(0.022 – 0.037)

5.20 – 5.38**

(0.205 – 0.212)

7.65 – 7.90

(0.301 – 0.311)

1234

5

6

7

8 9 10 11 12

8.07 – 8.33*

(0.318 – 0.328)

2122 18 17 16 15 14

13

19202324

1.73 – 1.99

(0.068 – 0.078)

0.05 – 0.21

(0.002 – 0.008)

0.65

(0.0256)

BSC

0.25 – 0.38

(0.010 – 0.015)

NOTE: DIMENSIONS ARE IN MILLIMETERS

DIMENSIONS DO NOT INCLUDE MOLD FLASH. MOLD FLASH

SHALL NOT EXCEED 0.152mm (0.006") PER SIDE

DIMENSIONS DO NOT INCLUDE INTERLEAD FLASH. INTERLEAD

FLASH SHALL NOT EXCEED 0.254mm (0.010") PER SIDE

*

**

Dimensions in inches (millimeters) unless otherwise noted.

RELATED PARTS

PART NUMBER DESCRIPTION COMMENTS

LTC1334 Single Supply RS232/RS485 Transceiver 2 RS485 Dr/Rx or 4 RS232 Dr/Rx Pairs

LTC1343 Multiprotocol Serial Transceiver Software Selectable Mulitprotocol Interface

LTC1345 Single Supply V.35 Transceiver 3 Dr/3 Rx for Data and CLK Signals

LTC1346A Dual Supply V.35 Transceiver 3 Dr/3 Rx for Data and CLK Signals

LTC1344A Multiprotocol Cable Terminator, Pin Compatible to LTC1344 Allows Separate RS449 Mode

LTC1543 Multiprotocol Serial Transceiver 3 Dr/3 Rx for Data and CLK Signals

LTC1544 Multiprotocol Serial Transceiver 4 Dr/4 Rx for Control Signals and LL

LTC1545 Multiprotocol Serial Transceiver 5 Dr/5 Rx for Control Signals, LL, RL amd TM

Linear Technology Corporation

1630 McCarthy Blvd., Milpitas, CA 95035-7417

(408) 432-1900

●

FAX: (408) 434-0507

●

www.linear-tech.com

LTC1344CG

LTC1344CG

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