MAX3224MAX3227/ MAX3244/MAX3245 1A Supply Current, 1Mbps, 3.0V to 5.5V, RS-232 Transceivers with AutoShutdown Plus General Description Next Generation Device Features The MAX3224MAX3227/MAX3244/MAX3245 are 3V- For Smaller Packaging: powered EIA/TIA-232 and V.28/V.24 communications MAX3228/MAX3229: +2.5V to +5.5V RS-232 interfaces with automatic shutdown/wakeup features Transceivers in UCSP and high data-rate capabilities. For Low-Voltage or Data Cable Applications: All devices achieve a 1A supply current using Maxims MAX3380E/MAX3381E: +2.35V to +5.5V, 1A, revolutionary AutoShutdown Plus feature. These 2 Tx/2 Rx RS-232 Transceivers with 15kV ESD- devices automatically enter a low-power shutdown Protected I/O and Logic Pins mode when the RS-232 cable is disconnected or the transmitters of the connected peripherals are inactive, For Integrated ESD Protection: and the UART driving the transmitter inputs is inactive MAX3222E/MAX3232E/MAX3237E/MAX3241E/ for more than 30 seconds. They turn on again when MAX3246E: 15kV ESD-Protected, Down to 10nA, they sense a valid transition at any transmitter or receiv- +3.0V to +5.5V, Up to 1Mbps, True RS-232 er input. AutoShutdown Plus saves power without Transceivers (MAX3246E Available in UCSP) changes to the existing BIOS or operating system. The MAX3225/MAX3227/MAX3245 also feature MegaBaud operation, guaranteeing 1Mbps for high- Ordering Information speed applications such as communicating with ISDN modems. The MAX3224/MAX3226/MAX3244 guarantee PART TEMP RANGE PIN-PACKAGE 250kbps operation. The transceivers have a proprietary MAX3224CPP+ 0C to +70C 20 PDIP low-dropout transmitter output stage enabling true RS- MAX3224CAP+ 0C to +70C 20 SSOP 232 performance from a +3.0V to +5.5V supply with a MAX3224CTP+ 0C to +70C 20 TQFN-EP* dual charge pump. The charge pump requires only four small 0.1F capacitors for operation from a 3.3V supply. MAX3224CUP+ 0C to +70C 20 TSSOP The MAX3224MAX3227 feature a logic-level output MAX3224EPP+ -40C to +85C 20 PDIP (READY) that asserts when the charge pump is regulat- MAX3224EAP+ -40C to +85C 20 SSOP ing and the device is ready to begin transmitting. MAX3224ETP+ -40C to +85C 20 TQFN-EP* All devices are available in a space-saving TQFN, MAX3224EUP+ -40C to +85C 20 TSSOP TSSOP, and SSOP packages. +Denotes a lead(Pb)-free/RoHS-compliant package. ApplicationsFunctional Diagrams *EP = Exposed pad. Ordering Information continued at end of data sheet. Notebook, Subnotebook, and Palmtop Computers Cellular Phones Selector Guide Battery-Powered Equipment Handheld Equipment NO. OF GUARANTEED Auto- READY PART DRIVERS/ DATA RATE Shutdown OUTPUT Peripherals RECEIVERS (bps) Plus Printers MAX3224 2/2 250k MAX3225 2/2 1M MAX3226 1/1 250k MAX3227 1/1 1M MAX3244 3/5 250k MAX3245 3/5 1M Pin Configurations appear at end of data sheet. AutoShutdown Plus, MegaBaud, and UCSP are trademarks Functional Diagrams continued at end of data sheet. of Maxim Integrated Products, Inc. UCSP is a trademark of Maxim Integrated Products, Inc. For pricing, delivery, and ordering information, please contact Maxim Direct 19-1289 Rev 5 2/11 at 1-888-629-4642, or visit Maxims website at www.maxim integrated.com. AVAILABLEMAX3224MAX3227/MAX3244/MAX3245 1A Supply Current, 1Mbps, 3.0V to 5.5V, RS-232 Transceivers with AutoShutdown Plus ABSOLUTE MAXIMUM RATINGS V to GND..............................................................-0.3V to +6V Continuous Power Dissipation (T = +70C) CC A V+ to GND (Note 1)..................................................-0.3V to +7V 16-Pin SSOP (derate 7.14mW/C above +70C) .........571mW V- to GND (Note 1) ...................................................+0.3V to -7V 20-Pin PDIP (derate 11.11mW/C above +70C) ............889mW V+ + V-(Note 1) ................................................................+13V 20-Pin TQFN (derate 21.3mW/C above +70C)........1702.1mW Input Voltages 20-Pin SSOP (derate 8.00mW/C above +70C) .........640mW T IN, FORCEON, FORCEOFF to GND................ -0.3V to +6V 20-Pin TSSOP (derate 7.00mW/C above +70C) .......559mW R IN to GND ....................................................................25V 28-Pin SO (W) (derate 12.5mW/C above +70C) ............. 1W Output Voltages 28-Pin SSOP (derate 9.52mW/C above +70C) .........762mW T OUT to GND.............................................................13.2V Operating Temperature Ranges R OUT, INVALID, READY to GND .........-0.3V to (V + 0.3V) MAX32 C .....................................................0C to +70C CC Short-Circuit Duration MAX32 E ..................................................-40C to +85C T OUT to GND .......................................................Continuous Storage Temperature Range .............................-65C to +160C Lead Temperature (soldering, 10s) .................................+300C Soldering Temperature (reflow) .......................................+260C 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 (V = +3V to +5.5V, C1C4 = 0.1F, tested at 3.3V 10% C1 = 0.047F, C2C4 = 0.33F, tested at 5.0V 10% T = T to T , CC A MIN MAX unless otherwise noted. Typical values are at T = +25C.) A PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS DC CHARACTERISTICS (V = 3.3V or 5.0V, T = +25C) CC A Supply Current, FORCEON = GND, FORCEOFF = V , CC 110 A AutoShutdown Plus all R IN idle, all T IN idle Supply Current, Shutdown FORCEOFF = GND 110 A Supply Current, FORCEON = FORCEOFF = V , no load 0.3 1 mA CC AutoShutdown Plus Disabled LOGIC INPUTS AND RECEIVER OUTPUTS Input Logic Threshold Low T IN, FORCEON, FORCEOFF 0.8 V V = 3.3V 2 T IN, FORCEON, CC Input Logic Threshold High V FORCEOFF V = 5.0V 2.4 CC Transmitter Input Hysteresis 0.5 V Input Leakage Current 0.01 1 A T IN, FORCEON, FORCEOFF R OUT (MAX3244/MAX3245), receivers Output Leakage Current 0.05 10 A disabled Output Voltage Low I = 1.6mA 0.4 V OUT Output Voltage High I = -1.0mA V - 0.6 V - 0.1 V OUT CC CC RECEIVER INPUTS Input Voltage Range -25 +25 V V = 3.3V 0.6 1.2 CC Input Threshold Low T = +25C V A V = 5.0V 0.8 1.5 CC V = 3.3V 1.5 2.4 CC Input Threshold High T = +25C V A V = 5.0V 1.8 2.4 CC Input Hysteresis 0.5 V Input Resistance T = +25C 35 7 k A 2 Maxim Integrated