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MAX3244E Datasheet(PDF) 1 Page - Maxim Integrated Products |
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MAX3244E Datasheet(HTML) 1 Page - Maxim Integrated Products |
1 / 20 page For free samples & the latest literature: http://www.maxim-ic.com, or phone 1-800-998-8800. For small orders, phone 408-737-7600 ext. 3468. ________________General Description The MAX3224E/MAX3225E/MAX3226E/MAX3227E/ MAX3244E/MAX3245E are 3V-powered EIA/TIA-232 and V.28/V.24 communications interfaces with automat- ic shutdown/wakeup features, high data-rate capabili- ties, 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. All devices achieve a 1µA supply current using Maxim’s revolutionary AutoShutdown Plus™ feature. These devices automatically enter a low-power shutdown mode when the RS-232 cable is disconnected or the transmitters of the connected peripherals are inactive, and the UART driving the transmitter inputs is inactive for more than 30 seconds. They turn on again when they sense a valid transition at any transmitter or receiv- er input. AutoShutdown Plus saves power without changes to the existing BIOS or operating system. The MAX3225E/MAX3227E/MAX3245E also feature MegaBaud™ operation, guaranteeing 1Mbps for high- speed applications such as communicating with ISDN modems. The MAX3224E/MAX3226E/MAX3244E guar- antee 250kbps operation. The transceivers have a pro- prietary low-dropout transmitter output stage enabling 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. The MAX3224E–MAX3227E feature a logic- level output (READY) that asserts when the charge pump is regulating and the device is ready to begin transmitting. All devices are available in a space-saving SSOP pack- age. ________________________Applications Notebook, Subnotebook, and Palmtop Computers Cellular Phones Battery-Powered Equipment Hand-Held Equipment Peripherals Printers ____________________________Features o ESD Protection for RS-232 I/O Pins: ±15kV—Human Body Model ±8kV—IEC1000-4-2, Contact Discharge ±15kV—IEC1000-4-2, Air-Gap Discharge o Latchup Free o 1µA Supply Current o AutoShutdown Plus—EDN Innovation of the Year o Guaranteed Data Rate: 250kbps (MAX3224E/3226E/3244E) 1Mbps (MAX3225E/3227E/3245E) o Guaranteed Slew Rate: 6V/µs (MAX3224E/3226E/3244E) 24V/µs (MAX3225E/3227E/3245E) o Meets EIA/TIA-232 Specifications Down to 3.0V o Guaranteed Mouse Driveability (MAX3244E/3245E) o Ready-to-Transmit Logic-Level Output ±15kV ESD-Protected, 1µA, 1Mbps, 3.0V to 5.5V, RS-232 Transceivers with AutoShutdown Plus ________________________________________________________________ Maxim Integrated Products 1 19-1339; Rev 0; 1/98 PART MAX3224E MAX3225E MAX3226E 1/1 2/2 2/2 NO. OF DRIVERS/ RECEIVERS READY OUTPUT AUTO- SHUTDOWN PLUS 250k 1M 250k GUARANTEED DATA RATE (bps) MAX3227E MAX3244E MAX3245E 3/5 3/5 1/1 — — 1M 250k 1M PART MAX3224ECPP MAX3224ECAP MAX3224EEPP -40°C to +85°C 0°C to +70°C 0°C to +70°C TEMP. RANGE PIN-PACKAGE 20 Plastic DIP 20 SSOP 20 Plastic DIP MAX3224EEAP MAX3225ECPP MAX3225ECAP 0°C to +70°C 0°C to +70°C -40°C to +85°C 20 SSOP 20 Plastic DIP 20 SSOP MAX3225EEPP -40°C to +85°C 20 Plastic DIP MAX3225EEAP -40°C to +85°C 20 SSOP Ordering Information continued at end of data sheet. AutoShutdown Plus and MegaBaud are trademarks 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; 5,649,210; and other patents pending. _____________________ Selector Guide _______________Ordering Information |
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