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1、MAX3241ECAI中文资料General DescriptionThe 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
2、 protected to 15kV using IEC 1000-4-2 Air-G ap Discharge, 8kV using IEC 1000-4-2 Contact Discharge,and 15kV using the Human Body Model. In addition, the MAX3237Es logic and receiver I/O pins are protected to the above ESD standards.The transceivers have a proprietary low-dropout transmit-ter output
3、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 0.1F 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
4、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 1A shutdown mode that reduces power consumption and
5、 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 1A supply current.Both the MAX3222E and MAX3232E are pin, package,and functionally compatible with the industry-standard MAX242 and MAX232,
6、 respectively.The MAX3241E is a complete serial port (three drivers/five receivers) designed for notebook and sub-notebook 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 re
7、ceivers can remain active while using a supply current of only 1A (MAX3241E) or 10nA (MAX3237E). The MAX3237E/MAX3241E have additional receiver outputs that always remain active.The MAX3222E, MAX3232E, and MAX3241E are avail-able in space-saving SO, SSOP, and TSSOP packages.The MAX3237E is available
8、 in an SSOP package._ApplicationsBattery-Powered Equipment PrintersCell PhonesSmart Phones Cell-Phone Data Cables xDSL ModemsNotebook, Subnotebook, and Palmtop ComputersFeatureso ESD Protection for RS-232 I/O Pins(MAX3222E/MAX3232E/MAX3237E/MAX3241E)15kVHuman Body Model8kVIEC 1000-4-2, Contact Disch
9、arge 15kVIEC 1000-4-2, Air-Gap Discharge o ESD Protection For All Logic and Receiver I/O Pins (MAX3237E)15kVHuman Body Model8kVIEC 1000-4-2, Contact Discharge 15kVIEC 1000-4-2, Air-Gap Discharge o Guaranteed Data Rate250kbps (MAX3222E/MAX3232E/MAX3241E and MAX3237E, Normal Operation)1Mbps (MAX3237E,
10、 MegaBaud Operation)o Latchup Freeo Low-Power Shutdown with Receivers Active1A (MAX3222E/MAX3241E)10nA (MAX3237E)o Flow-Through Pinout (MAX3237E)o Guaranteed Mouse Driveability (MAX3241E)o Meets EIA/TIA-232 Specifications Down to 3.0VMAX3222E/MAX3232E/MAX3237E/MAX3241E ?15kV ESD-Protected, Down to 1
11、0nA, 3.0V to 5.5V ,Up to 1Mbps, True RS-232 Transceivers_Maxim Integrated Products119-1298; Rev 5; 3/02MegaBaud is a trademark of Maxim Integrated Products, Inc.?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.For
12、pricing, delivery, and ordering information,please contact Maxim/Dallas Direct!at 1-888-629-4642, or visit Maxims website at http:/ A X 3222E /M A X 3232E /M A X 3237E /M A X 3241E15kV ESD-Protected, Down to 10nA, 3.0V to 5.5V ,Up to 1Mbps, True RS-232 TransceiversABSOLUTE MAXIMUM RATINGSELECTRICAL
13、CHARACTERISTICSStresses 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 no
14、t implied. Exposure to absolute maximum rating conditions for extended periods may affect device reliability.V CC 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 VoltagesT_IN, EN , SHDN , MBAUD to GND .-0.3V to +6V R_IN to GND.25V Output VoltagesT_OUT to GND.13.2V R_OUT, R_OUTB (MAX3241E).-0.3V to (V CC + 0.3V)Short-Circuit Duration, T_OUT to GND.Continuous Continuous Power
