MAX232 datasheet(8/25 Pages) MAXIM

No de pièce	MAX232

Description	15kV ESD-Protected, 5V RS-232 Transceivers

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Fabricant	MAXIM [Maxim Integrated Products]

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8

_______________________________________________________________________________________

±15kV ESD-Protected, +5V RS-232 Transceivers

V+

GND

MAX206E

MAX211E

MAX213E

MAX241E

0.1µF

*

VCC

0.1µF

*

R1 TO R5

T1 TO T5

0.1µF

*

C1+

C1-

C2+

C2-

VCC

+5.5V

T_OUT

R_OUT

400k

5k

ISHDN

0V OR +5.5V

DRIVE

0.1µF

*

0.1µF

*

3k

+5.5V

R_IN

T_IN

CAPACITORS MAY BE

POLARIZED OR UNPOLARIZED

( ) ARE FOR MAX213E

* 1µF FOR MAX241E

EN (EN)

SHDN (SHDN)

+5.5V (0V)

V-

+5.5V

Figure 1. Shutdown-Current Test Circuit (MAX206E,

MAX211E/MAX213E/MAX241E)

+3.5V

EN

INPUT

OUTPUT ENABLE TIME

+2.5V

RECEIVER

OUTPUT

CL = 150pF

RECEIVER

OUTPUTS

OUTPUT DISABLE TIME

VOH - 0.1V

VOH

VOL

VOL + 0.1V

RL = 1kΩ

NOTE:

POLARITY OF EN

IS REVERSED

FOR THE

MAX213E

+0.8V

0V

+3V

EN

INPUT

0V

Figure 2. Receiver Output Enable and Disable Timing

(MAX205E/MAX206E/MAX211E/MAX213E/MAX241E)

17

NAME

FUNCTION

V-

T_OUT

RS-232 Driver Outputs

-2VCC voltage generated by the charge pump

R_IN

RS-232 Receiver Inputs

24

R_OUT

TTL/CMOS Receiver Outputs. For the MAX213E, receivers R4 and R5 are active in shutdown

mode when EN = 1. For the MAX211E and MAX241E, all receivers are inactive in shutdown.

1, 2, 3, 28

4, 9, 18, 23, 27

EN

T_IN

TTL/CMOS Driver Inputs. Only the MAX211E, MAX213E, and MAX241E have internal pull-ups to VCC.

Receiver Enable—active high (MAX213E)

GND

Ground

25

VCC

+4.5V to +5.5V Supply Voltage

SHDN

C1+, C1-

Terminals for positive charge-pump capacitor

5, 8, 19, 22, 26

6, 7, 20, 21

10

Shutdown Control—active low (MAX213E)

V+

+2VCC voltage generated by the charge pump

C2+, C2-

Terminals for negative charge-pump capacitor

11

12, 14

13

15, 16

EN

Receiver Enable—active low (MAX211E, MAX241E)

SHDN

Shutdown Control—active high (MAX211E, MAX241E)

________________________________________________Pin Descriptions (continued)

MAX211E/MAX213E/MAX241E

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