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XR32430/XR32431

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exar.com/XR32430_XR32431

Rev 1A

Pin Configuration

Pin Assignments

XR32340

XR32341

Pin Name

Type

Description

1, 2, 3, 4, 5

1, 2, 3, 4, 5

R1IN, R2IN,

R3IN, R4IN,

R5IN

Inputs

(5K pull-

dwn)-

±15KV ESD Protected, RS-232 Receiver Inputs

6. 7, 8

6. 7, 8

T1OUT, T2OUT,

T3OUT

Output

±15KV ESD Protected, RS-232 Driver Output

9,16, 25, 32

9,16, 32

NC

-

10, 11, 12

10, 11, 12

T3IN, T2IN, T1IN

Input

TTL/CMOS Driver Input

13,14,15,

17, 18, 19

13,14,15,

17, 18, 19

R5OUT, R4OUT,

R3OUT, R2OUT,

R1OUT, R2OUT

Output

TTL/CMOS Receiver Output

20

20

Status

Output

TTL/CMOS level output indicating if no valid RS-232 levels are present at the R1IN or

R2IN input pins.

21

21

Shutdown

Input

TTL/CMOS level input, when driven low puts the part into shutdown mode (tri-stating

driver outputs and disabling the charge-pump); normal operation when driven high.

22

22

Online

Input

TTL/CMOS level input. A low input enables Auto On-Line mode, a high input disables

Auto On-Line Mode.

23, 28

23, 28

C1-, C1+

Analog

Negative and positive terminals of voltage doubler charge pump capacitor.

24

24

GND

Supply

Ground

-25

Supply

I/O Power Supply

26

26

Supply

Power Supply

27

27

V+

Analog

Regulated positive (+5.5V) charge pump rail.

29, 30

29, 30

C2+, C2-

Analog

Positive and negative terminals of the inverting charge pump capacitor.

31

31

V-

Analog

Regulated positive (-5.5V) charge pump rail.

-

-

Paddle

Supply

Ground. The exposed paddle on the bottom of package is connected to device

ground. The paddle should be connected to ground on pcb.

1

2

3

4

5

17

6

18

R1IN

R2IN

T1OUT

T2OUT

R1OUT

C1-

GND

25

26

27

29

30

31

32

28

R3IN

R4IN

R5IN

T3OUT

R2OUT

R2OUT

XR32430

32 pin QFN (5x5mm)

1

2

3

4

5

17

6

18

R1IN

R2IN

T1OUT

T2OUT

R1OUT

C1-

GND

25

26

27

29

30

31

32

28

R3IN

R4IN

R5IN

T3OUT

R2OUT

R2OUT

XR32431

32 pin QFN (5x5mm)