Maxim cannot assume responsibility for use of any circuitry other than circuitry entirely embodied in a Maxim product. No circuit patent licenses are

implied. Maxim reserves the right to change the circuitry and specifications without notice at any time.

8

___________________Maxim Integrated Products, 120 San Gabriel Drive, Sunnyvale, CA 94086 (408) 737-7600

© 1993 Maxim Integrated Products

Printed USA

is a registered trademark of Maxim Integrated Products.

Complete 230kbps, 2.7V to 5.25V

Serial Interface for Notebook Computers

and X7R ceramic capacitors are recommended for

operation over the full temperature range.

Larger capacitors may be used for C2 and C4 (see

Typical Operating Circuit) to reduce ripple on the trans-

mitter output voltages.

Power-Supply Decoupling

In applications that are sensitive to power-supply noise,

value to that of the C1A and C1B charge-pump capaci-

tors. Connect the bypass capacitor as close as possi-

V+ and V- as Power Supplies

A small amount of power can be drawn from V+ and V-.

Excessive loads will cause V+ and V- to fall out of

regulation. When V+ or V- are loaded, check for good

regulation over the intended operating temperature

range.

___________________Chip Topography

32

1

28 27 26

25

4

6

7

8

9

10

5

11 12 13 14 15

16

17

18

24

23

22

21

20

19

C1B-

C1A-

C1B+

C1A+

V+

GND

V-

C2+

C2-

EN

SHDN

0.164"

(4.166mm)

0.135"

(3.429mm)

Table 2. Summary of EIA/TIA-232E/V.28 and EIA/TIA-562 Specifications

PARAMETER

CONDITION

EIA/TIA-232E/V.28

SPECIFICATION

EIA/TIA-562

SPECIFICATION

Driver Output Voltage

0 Level

3k

Ω to 7kΩ load

5.0V to 15.0V

3.7V to 13.2V

1 Level

-5.0V to -15.0V

-3.7V to -13.2V

Maximum Output Level

No load

±25V

±13.2V

Signal Rate (3k

Ω ≤ R

Up to 20kbps

Up to 20kbps

Not defined

Up to 64kbps

Substrate connected to V+

Transistor count: 1892