LTC2845 datasheet(2/20 Pages) LINER

Part #	LTC2845

Description	3.3V Software-Selectable Multiprotocol Transceiver

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Manufacturer	LINER [Linear Technology]

Direct Link	http://www.linear.com

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LTC2845

sn2845 2845fs

ABSOLUTE MAXIMUM RATINGS

PACKAGE/ORDER INFORMATION

(Note 1)

Supply Voltage

VCC ....................................................... –0.3V to 6.5V

VIN ..................................................................... –0.3V to 6.5V

VEE ...................................................................... –10V to 0.3V

VDD ..................................................................... – 0.3V to 10V

Input Voltage

Transmitters ........................... – 0.3V to (VCC + 0.3V)

Receivers ............................................... – 18V to 18V

Logic Pins .............................. – 0.3V to (VCC + 0.3V)

Output Voltage

Transmitters .................. (VEE – 0.3V) to (VDD + 0.3V)

Receivers ................................. – 0.3V to (VIN + 0.3V)

The q denotes specifications which apply over the full operating tempera-

ture range, otherwise specifications are at TA = 25°C. VCC = 5V, VIN = 3.3V, VDD = 8V, VEE = – 7V for V.28, – 5.5V for V.10, V.11

(Notes 2, 3)

ELECTRICAL CHARACTERISTICS

SYMBOL

PARAMETER

CONDITIONS

MIN

TYP

MAX

UNITS

Supplies

ICC

VCC Supply Current (DCE Mode,

RS530, RS530-A, X.21 Modes, No Load

2.7

mA

All Digital Pins = GND or VIN)

RS530, RS530-A, X.21 Modes, Full Load

q

110

150

mA

V.28 Mode, No Load

q

13

mA

V.28 Mode, Full Load

q

13

mA

No-Cable Mode

q

700

1400

µA

Short-Circuit Duration

Transmitter Output ..................................... Indefinite

Receiver Output .......................................... Indefinite

VEE.................................................................. 30 sec

Operating Temperature Range

LTC2845C ............................................... 0

°C to 70°C

LTC2845I ........................................... – 40

°C to 85°C

Storage Temperature Range ................ – 65

°C to 150°C

Lead Temperature (Soldering, 10 sec)................. 300

°C

ORDER PART

NUMBER

LTC2845CG

LTC2845IG

1

2

3

4

5

6

7

8

9

10

11

12

13

14

15

16

17

18

TOP VIEW

36

35

34

33

32

31

30

29

28

27

26

25

24

23

22

21

20

19

VCC

VDD

D1

D2

D3

R1

R2

R3

D4

R4

M0

M1

M2

DCE/DTE

D4ENB

R4EN

R5

D5

VEE

GND

D1 A

D1 B

D2 A

D2 B

D3/R1 A

D3/R1 B

R2 A

R2 B

R3 A

R3 B

D4 A

R4 A

R5 A

D5 A

VIN

VCC

R1

D2

D1

D3

R3

G PACKAGE

36-LEAD PLASTIC SSOP

D5

R5

D4

R2

R4

TJMAX = 125°C, θJA = 90°C/ W, θJC = 35°C/ W

Consult LTC Marketing for parts specified with wider operating temperature ranges.

ORDER PART

NUMBER

LTC2845CUHF

LTC2845IUHF

13 14 15 16

TOP VIEW

UHF PACKAGE

38-LEAD (7mm

× 5mm) PLASTIC QFN

17 18 19

38 37 36 35 34 33 32

24

25

26

27

28

29

30

31

8

7

6

5

4

3

2

1

D2

D3

R1

R2

R3

D4

R4

M0

M1

M2

NC

DCE/DTE

D1 B

D2 A

D2 B

D3/R1 A

D3/R1 B

R2 A

R2 B

R3 A

R3 B

D4 A

R4 A

R5 A

23

22

21

20

9

10

11

12

39

TJMAX = 125°C, θJA = 34°C/ W

EXPOSED PAD IS VEE (PIN 39)

MUST BE SOLDERED TO PCB

UHF PART

MARKING

2845

2845I

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