(Top View)

INVALID

FORCEON

VL

C1-

FORCEOFF

GND

DOUT1

DOUT2

RIN1

RIN2

C3-

C3+

11

10

12

8

7

9

20

21

19

23

24

22

3

TRS3122E

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SLLSET7C – MAY 2016 – REVISED MAY 2016

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5 Pin Configuration and Functions

VQFN P Package

24-Pin RGE

Top View

Pin Functions

Pin

I/O

DESCRIPTION

NAME

NO.

C1+, C2+

21, 22

-

Positive terminals of voltage-doubler charge-pump capacitors (required)

C3+

1

-

Positive terminal of voltage-tripler charge-pump capacitor (Not needed for VCC 3V to 5.5V)

C1–, C2-

16, 23

-

Negative terminals of voltage-doubler charge-pump capacitors (required)

C3-

2

-

Negative terminal of voltage-tripler charge-pump capacitor (Not needed for VCC 3V to 5.5V)

V+

20

-

Positive charge pump storage capacitor (required)

V–

24

-

Negative charge pump storage capacitor (required)

GND

17

-

Ground

19

-

1.8-V or 3-V to 5-V supply voltage

18

-

Logic-level supply. All CMOS inputs (DIN) and outputs (ROUT) are referenced to this supply.

FORCEOFF

14

I

Auto Powerdown Control input (Refer to Truth Table)

FORCEON

15

I

Auto Powerdown Control input (Refer to Truth Table)

INVALID

13

O

Invalid Output Pin

DIN1, DIN2

10,9

I

Driver inputs

DOUT1,

DOUT2

5, 6

O

RS-232 driver outputs

RIN1, RIN2

3, 4

I

RS-232 receiver inputs

ROUT1,

ROUT2

12, 11

O

NC

7, 8

I

Factory pins, can be unconnected or connected to GND