MAX3237E

The MAX3222E/MAX3232E/MAX3237E/MAX3241E are 3V-powered EIA/TIA-232 and V.28/V.24 communications interfaces with low power requirements, high datarate 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 Discharge, 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 transmitter 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 guaranteed 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 maintaining 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 computers. 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 current 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 spacesaving SO, SSOP, and TSSOP packages. The MAX3241E is available in SO and SSOP packages. The MAX3237E is available in an SSOP package.

Notebooks, Subnotebooks, Smart Phones
and Palmtop Computers XDSL Modems
Battery-Powered Equipment Printers
Cell-Phone Data Cables Cell Phones

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℃)
    16-Pin SSOP (derate 7.14mW/℃ above +70℃) .......... 571mW
    16-Pin Wide SO (derate 9.52mW/℃ above +70℃) ..... 762mW
    18-Pin Wide SO (derate 9.52mW/℃ above +70℃) ..... 762mW
    18-Pin PDIP (derate 11.11mW/℃ above +70℃).......... 889mW
    20-Pin TSSOP (derate 7.0mW/℃ above +70℃) .......... 559mW
    20-Pin SSOP (derate 8.00mW/℃ above +70℃) .......... 640mW
    28-Pin SSOP (derate 9.52mW/℃ above +70℃) .......... 762mW
    28-Pin Wide SO (derate 12.50mW/℃ above +70℃) ........... 1W
Operating Temperature Ranges
    MAX32_ _EC_ _ ..................................................0℃ to +70℃
    MAX32_ _EE_ _................................................-40℃ to +85℃
Storage Temperature Range ............................. -65℃ to +150℃
Lead Temperature (soldering, 10s) ................................. +300℃

· 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
· 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
· ESD Protection for Transmitter Output Pins (MAX3237E)
    ±15kV—Human Body Model
· Guaranteed Data Rate 250kbps (MAX3222E/MAX3232E/MAX3241E and MAX3237E, normal operation) 1Mbps (MAX3237E, MegaBaud operation)
· Latchup Free
· Low-Power Shutdown with Receivers Active 1μA (MAX3222E/MAX3241E) 10nA (MAX3237E)
· Flow-Through Pinout (MAX3237E)
· Guaranteed Mouse Driveability (MAX3241E)
· Meets EIA/TIA-232 Specifications Down to 3.0V

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Description

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Specifications

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Pinout

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