MAX3246 판매점 - 15kV ESD-Protected / Down to 10nA / 3.0V to 5.5V / Up to 1Mbps / True RS-232 Transceivers

MAX3246 반도체 회로 부품 판매점

15kV ESD-Protected / Down to 10nA / 3.0V to 5.5V / Up to 1Mbps / True RS-232 Transceivers

Maxim Integrated

19-1298; Rev 3a; 1/00

±15kV ESD-Protected, Down to 10nA, 3.0V to 5.5V,

Up to 1Mbps, True RS-232 Transceivers

________________General Description ____________________________Features

The MAX3222E/MAX3232E/MAX3237E/MAX3241E are

3V-powered EIA/TIA-232 and V.28/V.24 communications

interfaces with low power requirements, high data-

rate capabilities, and enhanced electrostatic discharge

(ESD) protection. All transmitter outputs and receiver

inputs are protected to ±15kV using IEC 1000-4-2 Air-

Gap Discharge, ±8kV using IEC 1000-4-2 Contact Dis-

charge, and ±15kV using the Human Body Model. The

MAX3237E’s logic and receiver I/O pins are protected to

the above standards, while the transmitter output pins are

protected to ±15kV using the Human Body Model.

The transceivers have a proprietary low-dropout transmit-

ter output stage, delivering true RS-232 performance from

a +3.0V to +5.5V supply with a dual charge pump. The

charge pump requires only four small 0.1µF capacitors

for operation from a +3.3V supply. Each device is guaran-

teed to run at data rates of 250kbps while maintaining RS-

232 output levels. The MAX3237E is guaranteed to run at

data rates of 250kbps in the normal operating mode and

1Mbps in the MegaBaud™ operating mode while main-

taining RS-232-compliant output levels.

The MAX3222E/MAX3232E have two receivers and two

drivers. The MAX3222E features a 1µA shutdown mode

that reduces power consumption and extends battery

life in portable systems. Its receivers can remain active

in shutdown mode, allowing external devices such as

modems to be monitored using only 1µA supply current.

Both the MAX3222E and MAX3232E are pin, package,

and functionally compatible with the industry-standard

MAX242 and MAX232, respectively.

The MAX3241E is a complete serial port (three drivers/five

receivers) designed for notebook and subnotebook com-

puters. The MAX3237E (five drivers/three receivers) is ideal

for peripheral applications that require fast data transfer.

Both devices feature a shutdown mode in which all

receivers can remain active while using a supply cur-

rent of only 1µA (MAX3241E) or 10nA (MAX3237E). The

MAX3237E/MAX3241E have additional receiver outputs

that always remain active.

The MAX3222E and MAX3232E are available in space-

saving SO, SSOP, and TSSOP packages. The MAX3241E

is available in SO and SSOP packages. The MAX3237E is

available in an SSOP package.

o ESD Protection for RS-232 I/O Pins

(MAX3222E/MAX3232E/MAX3241E)

±15kV—Human Body Model

±8kV—IEC 1000-4-2, Contact Discharge

±15kV—IEC 1000-4-2, Air-Gap Discharge

o ESD Protection for All Logic and Receiver I/O

Pins (MAX3237E)

±15kV—Human Body Model

±8kV—IEC 1000-4-2, Contact Discharge

±15kV—IEC 1000-4-2, Air-Gap Discharge

o ESD Protection for Transmitter Output Pins

(MAX3237E)

±15kV—Human Body Model

o Guaranteed Data Rate

250kbps (MAX3222E/MAX3232E/MAX3241E

and MAX3237E, normal operation)

1Mbps (MAX3237E, MegaBaud operation)

o Latchup Free

o Low-Power Shutdown with Receivers Active

1µA (MAX3222E/MAX3241E)

10nA (MAX3237E)

o Flow-Through Pinout (MAX3237E)

o Guaranteed Mouse Driveability (MAX3241E)

o Meets EIA/TIA-232 Specifications Down to 3.0V

_______________Ordering Information

PART

TEMP. RANGE PIN-PACKAGE

MAX3222ECUP 0°C to +70°C

20 TSSOP

MAX3222ECAP

0°C to +70°C

20 SSOP

Ordering Information continued at end of data sheet.

___________________________Selector Guide

PART

MAX3222E

MAX3232E

MAX3237E

(Normal)

NO. OF

DRIVERS/

RECEIVERS

2/2

5/3

LOW-

POWER

SHUTDOWN

✔

—

GUARANTEED

DATA RATE

(kbps)

250

✔ 250

________________________Applications

Notebooks, Subnotebooks, Smart Phones

and Palmtop Computers

XDSL Modems

Battery-Powered Equipment Printers

Cell-Phone Data Cables

Cell Phones

MAX3237E

(MegaBaud)

MAX3241E

5/3

3/5

✔

250

Pin Configurations appear at end of data sheet.

Typical Operating Circuits appear at end of data sheet.

MegaBaud is a trademark of Maxim Integrated Products.

†Covered by U.S. Patent numbers 4,636,930; 4,679,134; 4,777,577; 4,797,899; 4,809,152; 4,897,774; 4,999,761; and other patents pending.

________________________________________________________________ Maxim Integrated Products 1

For free samples and the latest literature, visit www.maxim-ic.com or phone 1-800-998-8800.

For small orders, phone 1-800-835-8769.

±15kV ESD-Protected, Down to 10nA, 3.0V to 5.5V,

Up to 1Mbps, True RS-232 Transceivers

ABSOLUTE MAXIMUM RATINGS

VCC to GND ..............................................................-0.3V to +6V

V+ to GND (Note 1) ..................................................-0.3V to +7V

V- to GND (Note 1) ...................................................+0.3V to -7V

V+ + |V-| (Note 1) .................................................................+13V

Input Voltages

T_IN, EN, SHDN, MBAUD to GND ........................-0.3V to +6V

R_IN to GND .....................................................................±25V

Output Voltages

T_OUT to GND...............................................................±13.2V

R_OUT, R_OUTB (MAX3241E)................-0.3V to (VCC + 0.3V)

Short-Circuit Duration, T_OUT to GND.......................Continuous

Continuous Power Dissipation (TA = +70°C)

16-Pin SSOP (derate 7.14mW/°C above +70°C) ..........571mW

16-Pin Wide SO (derate 9.52mW/°C above +70°C) .....762mW

18-Pin Wide SO (derate 9.52mW/°C above +70°C) .....762mW

18-Pin PDIP (derate 11.11mW/°C above +70°C)..........889mW

20-Pin TSSOP (derate 7.0mW/°C above +70°C) ..........559mW

20-Pin SSOP (derate 8.00mW/°C above +70°C) ..........640mW

28-Pin SSOP (derate 9.52mW/°C above +70°C) ..........762mW

28-Pin Wide SO (derate 12.50mW/°C above +70°C) .............1W

Operating Temperature Ranges

MAX32_ _EC_ _ ...................................................0°C to +70°C

MAX32_ _EE_ _.................................................-40°C to +85°C

Storage Temperature Range .............................-65°C to +150°C

Lead Temperature (soldering, 10s) .................................+300°C

Note 1: V+ and V- can have maximum magnitudes of 7V, but their absolute difference cannot exceed 13V.

Stresses beyond those listed under “Absolute Maximum Ratings” may cause permanent damage to the device. These are stress ratings only, and functional

operation of the device at these or any other conditions beyond those indicated in the operational sections of the specifications is not implied. Exposure to

absolute maximum rating conditions for extended periods may affect device reliability.

ELECTRICAL CHARACTERISTICS

(VCC = +3.0V to +5.5V, C1–C4 = 0.1µF, TA = TMIN to TMAX, unless otherwise noted. Typical values are at TA = +25°C.) (Note 2)

PARAMETER

CONDITIONS

DC CHARACTERISTICS (VCC = +3.3V or +5.0V, TA = +25°C)

Supply Current

SHDN = VCC, no load

MAX3222E, MAX3232E,

MAX3241E

MAX3237E

Shutdown Supply Current

SHDN = GND

SHDN = R_IN = GND, T_IN = GND or VCC (MAX3237E)

LOGIC INPUTS

Input Logic Low

T_IN, EN, SHDN, MBAUD

Input Logic High

T_IN, EN, SHDN, MBAUD

VCC = 3.3V

VCC = 5.0V

Transmitter Input Hysteresis

MIN TYP MAX UNITS

0.3 1

0.5 2.0

1 10 µA

10 300 nA

0.8

2.0

2.4

0.5

Input Leakage Current

RECEIVER OUTPUTS

Output Leakage Current

T_IN, EN, SHDN

T_IN, SHDN, MBAUD

MAX3222E, MAX3232E,

MAX3241E

MAX3237E (Note 3)

R_OUT (MAX3222E/MAX3237E/MAX3241E), EN = VCC,

receivers disabled

±0.01

±1

µA

±0.05 ±10

µA

Output Voltage Low

Output Voltage High

IOUT = 1.6mA (MAX3222E/MAX3232E/MAX3241E)

IOUT = 1.0mA (MAX3237E)

IOUT = -1.0mA

VCC - VCC -

0.6 0.1

0.4

RECEIVER INPUTS

Input Voltage Range

-25 +25 V

Input Threshold Low

TA = +25°C

VCC = 3.3V

VCC = 5.0V

0.6 1.1

0.8 1.5

2 _______________________________________________________________________________________

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MAX3246 transceiver

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MAX3246 반도체 회로 부품 판매점

15kV ESD-Protected / Down to 10nA / 3.0V to 5.5V / Up to 1Mbps / True RS-232 Transceivers

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