MAX3232CPE Integrated Circuit Chip 3.0V to 5.5V, Low-Power, up to 1Mbps, True RS-232 Transceivers

3.0V to 5.5V, Low-Power, up to 1Mbps, True RS-232 Transceivers Using Four 0.1µF External Capacitors

General Description

The MAX3222/MAX3232/MAX3237/MAX3241 transceivers have a proprietary low-dropout transmitter output stage enabling true RS-232 performance from a 3.0V to 5.5V supply with a dual charge pump. The devices require only four small 0.1µF external chargepump capacitors. The MAX3222, MAX3232, and MAX3241 are guaranteed to run at data rates of 120kbps while maintaining RS-232 output levels. The MAX3237 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 output levels.

The MAX3222/MAX3232 have 2 receivers and 2 drivers. The MAX3222 features a 1µA shutdown mode that reduces power consumption and extends battery life in portable systems. Its receivers remain active in shutdown mode, allowing external devices such as modems to be monitored using only 1µA supply current. The MAX3222 and MAX3232 are pin, package, and functionally compatible with the industry-standard MAX242 and MAX232, respectively.

The MAX3241 is a complete serial port (3 drivers/ 5 receivers) designed for notebook and subnotebook computers. The MAX3237 (5 drivers/3 receivers) is ideal for fast modem applications. Both these devices feature a shutdown mode in which all receivers can remain active while using only 1µA supply current. Receivers R1 (MAX3237/MAX3241) and R2 (MAX3241) have extra outputs in addition to their standard outputs. These extra outputs are always active, allowing external devices such as a modem to be monitored without forward biasing the protection diodes in circuitry that may have V_CC completely removed.

The MAX3222, MAX3237, and MAX3241 are available in space-saving TSSOP and SSOP packages.

Applications

• Notebook, Subnotebook, and Palmtop Computers
• High-Speed Modems
• Battery-Powered Equipment
• Hand-Held Equipment
• Peripherals
• Printers

Features

♦ Low Supply Current:

    300µA (MAX3222/MAX3232/MAX3241)

    500µA (MAX3237)

♦ Guaranteed Data Rate:

    120kbps (MAX3222/MAX3232/MAX3241)

    250kbps (MAX3237—Normal Operation)

    1Mbps (MAX3237—MegaBaud Operation)

♦ 1µA Low-Power Shutdown with Receivers Active (MAX3222/MAX3237/MAX3241)

♦ Flow-Through Pinout (MAX3237)

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

♦ Guaranteed Mouse Driveability (MAX3241)

♦ Pin Compatible with Industry-Standard MAX232 (MAX3232)

   Pin Compatible with Industry-Standard MAX242 (MAX3222)

♦ Guaranteed Slew Rate:

    6V/µs (MAX3222/MAX3232/MAX3237/MAX3241)

    24V/µs (MAX3237—MegaBaud Operation)

ABSOLUTE MAXIMUM RATINGS

V_CC...........................................................................-0.3V to +6V

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

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

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

Input Voltages

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

    MBAUD...................................................-0.3V to (VCC + 0.3V)

    R_IN .................................................................................±25V

Output Voltages

    T_OUT...........................................................................±13.2V

    R_OUT....................................................-0.3V to (VCC + 0.3V)

Short-Circuit Duration

    T_OUT ....................................................................Continuous

Continuous Power Dissipation (TA = +70°C)

    16-Pin Plastic DIP (derate 10.53mW/°C above +70°C)...842mW

    16-Pin Narrow SO (derate 8.70mW/°C above +70°C) ....696mW

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

    16-Pin TSSOP (derate 6.7mW/°C above +70°C).............533mW

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

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

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

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

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

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

    28-Pin TSSOP (derate 8.7mW/°C above +70°C).............696mW

Operating Temperature Ranges  

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

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

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

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

Note 1: V+ and V- can have a maximum magnitude 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.

Ordering Information

Pin Configurations