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APPLICATIONS

DOUT1

DOUT2

DOUT3

RIN1

RIN2

DOUT4

RIN3

NC

C1–

DIN1

DIN2

DIN3

ROUT1

ROUT2

DIN4

ROUT3

1

2

3

4

5

6

7

8

9

10

11

12

13

14

28

27

26

25

24

23

22

21

20

19

18

17

16

15

C2 +

GND

C2−

V−

DOUT1

DOUT2

DOUT3

RIN1

RIN2

DOUT4

RIN3

DOUT5

FORCEON

FORCEOFF

C1+

V+

C1−

DIN1

DIN2

DIN3

ROUT1

ROUT2

DIN4

ROUT3

DIN5

ROUT1B

INVALID

DB, DW, OR PW PACKAGE

(TOP VIEW)

RHB PACKAGE

(TOP VIEW)

1

2

3

4

5

6

7

8

24

23

22

21

20

19

18

17

31

32

30 29 28 27 26 25

10

9

11 12 13 14 15 16

DESCRIPTION/ORDERING INFORMATION

SN65C3238E

,, SN75C3238E

3-V TO 5.5-V MULTICHANNEL RS-232 LINE DRIVERS/RECEIVERS

WITH

±15-kV ESD (HBM) PROTECTION

SLLS726 – MAY 2006

•

RS-232 Bus-Pin ESD Protection Exceeds

±15 kV Using Human-Body Model (HBM)

•

Meet or Exceed the Requirements of

TIA/EIA-232-F and ITU v.28 Standards

•

•

Operate up to 1000 kbit/s

•

Five Drivers and Three Receivers

•

Auto-Powerdown Plus Feature Enables

Flexible Power-Down Mode

•

Low Standby Current . . . 1

µA Typical

•

External Capacitors . . . 4

× 0.1 µF

•

Accept 5-V Logic Input With 3.3-V Supply

•

Always-Active Noninverting Receiver Output

(ROUT1B)

•

ESD Protection for RS-232 Interface Pins

–

±15 kV – Human-Body Model (HBM)

–

±8 kV – IEC61000-4-2, Contact Discharge

–

±15 kV – IEC61000-4-2, Air-Gap Discharge

•

Battery-Powered Systems

•

PDAs

•

Notebooks

•

Subnotebooks

•

Laptops

•

Palmtop PCs

•

Hand-Held Equipment

•

Modems

•

Printers

The SN65C3238E and SN75C3238E consist of five line drivers, three line receivers, and a dual charge-pump

circuit with

±15-kV ESD (HBM) protection on the driver output (DOUT) and receiver input (RIN) terminals. The

devices meet the requirements of TIA/EIA-232-F and provide the electrical interface between notebook and

subnotebook computer applications. The charge pump and four small external capacitors allow operation from a

single 3-V to 5.5-V supply. In addition, the devices include an always-active noninverting output (ROUT1B),

which allows applications using the ring indicator to transmit data while the device is powered down. These

devices operate at data signaling rates up to 1000 kbit/s.

Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of Texas

Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.

PRODUCT PREVIEW information concerns products in the

Copyright © 2006, Texas Instruments Incorporated

formative or design phase of development. Characteristic data and

other specifications are design goals. Texas Instruments reserves

the right to change or discontinue these products without notice.