19-1298; Rev 7; 2/03 ±15kV ESD-Protected, Down to 10nA, 3.0V to 5.5V, Up to 1Mbps, True RS-232 Transceivers Features ♦ ESD Protection for RS-232 I/O Pins (MAX3222E/MAX3232E/MAX3241E/MAX3246E) ±15kV—Human Body Model ±8kV—IEC 1000-4-2, Contact Discharge ±9kV (MAX3246E Only)—IEC 1000-4-2, Contact Discharge ±15kV—IEC 1000-4-2, Air-Gap Discharge ________________________Applications Typical Operating Circuits appear at end of data sheet. Battery-Powered Equipment Cell Phones Cell-Phone Data Cables Notebook, Subnotebook, and Palmtop Computers Printers Smart Phones xDSL Modems ♦ 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/ MAX3246E/MAX3237E, Normal Operation) 1Mbps (MAX3237E, MegaBaud Operation) ♦ Latchup Free ♦ Low-Power Shutdown with Receivers Active 1µA (MAX3222E/MAX3241E/MAX3246E) 10nA (MAX3237E) ♦ Flow-Through Pinout (MAX3237E) ♦ Guaranteed Mouse Drivability (MAX3241E) ♦ Meets EIA/TIA-232 Specifications Down to +3.0V _______________Ordering Information PART TEMP RANGE PIN-PACKAGE MAX3222ECUP 0°C to +70°C 20 TSSOP MAX3222ECAP 0°C to +70°C 20 SSOP Ordering Information continued at end of data sheet. Pin Configurations appear at end of data sheet. Selector Guide appears at end of data sheet. MegaBaud is a trademark of Maxim Integrated Products, Inc. UCSP 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. ________________________________________________________________ Maxim Integrated Products For pricing, delivery, and ordering information, please contact Maxim/Dallas Direct! at 1-888-629-4642, or visit Maxim’s website at www.maxim-ic.com. 1 MAX3222E/MAX3232E/MAX3237E/MAX3241E †/MAX3246E General Description The MAX3222E/MAX3232E/MAX3237E/MAX3241E/ MAX3246E +3.0V-powered EIA/TIA-232 and V.28/V.24 communications interface devices feature low power consumption, high data-rate capabilities, and enhanced electrostatic-discharge (ESD) protection. The enhanced ESD structure protects all transmitter outputs and receiver inputs to ±15kV using IEC 1000-4-2 Air-Gap Discharge, ±8kV using IEC 1000-4-2 Contact Discharge (±9kV for MAX3246E), and ±15kV using the Human Body Model. The logic and receiver I/O pins of the MAX3237E are protected to the above standards, while the transmitter output pins are protected to ±15kV using the Human Body Model. A proprietary low-dropout transmitter output stage delivers true RS-232 performance from a +3.0V to +5.5V power supply, using an internal dual charge pump. The charge pump requires only four small 0.1µF capacitors for operation from a +3.3V supply. Each device guarantees operation at data rates of 250kbps while maintaining RS-232 output levels. The MAX3237E guarantees operation at 250kbps in the normal operating mode and 1Mbps in the MegaBaud™ operating mode, while maintaining RS-232compliant output levels. The MAX3222E/MAX3232E have two receivers and two transmitters. The MAX3222E features a 1µA shutdown mode that reduces power consumption in battery-powered portable systems. The MAX3222E receivers remain active in shutdown mode, allowing monitoring of external devices while consuming only 1µA of supply current. The MAX3222E and MAX3232E are pin, package, and functionally compatible with the industry-standard MAX242 and MAX232, respectively. The MAX3241E/MAX3246E are complete serial ports (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. These devices feature a shutdown mode in which all receivers remain active, while consuming only 1µA (MAX3241E/MAX3246E) or 10nA (MAX3237E). The MAX3222E, MAX3232E, and MAX3241E are available in space-saving SO, SSOP, and TSSOP packages. The MAX3237E is offered in an SSOP package. The MAX3246E is offered in the ultra-small 6 x 6 UCSP™ package. MAX3222E/MAX3232E/MAX3237E/MAX3241E †/MAX3246E ±15kV ESD-Protected, Down to 10nA, 3.0V to 5.5V, Up to 1Mbps, True RS-232 Transceivers ABSOLUTE MAXIMUM RATINGS 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°C) 16-Pin SSOP (derate 7.14mW/°C above +70°C) ..........571mW 16-Pin Wide SO (derate 9.52mW/°C above +70°C) .....762mW 18-Pin Wide SO (derate 9.52mW/°C above +70°C) .....762mW 18-Pin PDIP (derate 11.11mW/°C above +70°C)..........889mW 20-Pin TSSOP (derate 10.9mW/°C above +70°C) ........879mW 20-Pin SSOP (derate 8.00mW/°C above +70°C) ..........640mW 28-Pin SSOP (derate 9.52mW/°C above +70°C) ..........762mW 28-Pin Wide SO (derate 12.50mW/°C above +70°C) .............1W 28-Pin TSSOP (derate 12.8mW/°C above +70°C) ......1026mW 32-Lead QFN (derate 23.2mW/°C above +70°C) .........1860mW 6 x 6 UCSP (derate 12.6mW/°C above +70°C) .............1010mW Operating Temperature Ranges MAX32_ _EC_ _ ...................................................0°C to +70°C MAX32_ _EE_ _.................................................-40°C to +85°C Storage Temperature Range .............................-65°C to +150°C Lead Temperature (soldering, 10s) .................................+300°C Bump Reflow Temperature (Note 2) Infrared, 15s..................................................................+200°C Vapor Phase, 20s..........................................................+215°C Note 1: V+ and V- can have maximum magnitudes of 7V, but their absolute difference cannot exceed 13V. Note 2: This device is constructed using a unique set of packaging techniques that impose a limit on the thermal profile the device can be exposed to during board-level solder attach and rework. This limit permits only the use of the solder profiles recommended in the industry-standard specification, JEDEC 020A, paragraph 7.6, Table 3 for IR/VPR and convection reflow. Preheating is required. Hand or wave soldering is not allowed. 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 (VCC = +3V to +5.5V, C1–C4 = 0.1µF, TA = TMIN to TMAX, unless otherwise noted. Typical values are at TA = +25°C.) (Notes 3, 4) PARAMETER CONDITIONS MIN TYP MAX MAX3222E, MAX3232E, MAX3241E, MAX3246E 0.3 1 MAX3237E 0.5 2.0 UNITS DC CHARACTERISTICS (VCC = +3.3V or +5V, TA = +25°C) Supply Current Shutdown Supply Current SHDN = VCC, no load mA SHDN = GND 1 10 µA SHDN = R_IN = GND, T_IN = GND or VCC (MAX3237E) 10 300 nA 0.8 V LOGIC INPUTS Input Logic Low T_IN, EN, SHDN, MBAUD Input Logic High T_IN, EN, SHDN, MBAUD VCC = +3.3V 2.0 VCC = +5.0V 2.4 V Transmitter Input Hysteresis Input Leakage Current 0.5 T_IN, EN, SHDN MAX3222E, MAX3232E, MAX3241E, MAX3246E T_IN, SHDN, MBAUD MAX3237E (Note 5) V ±0.01 ±1 9 18 ±0.05 ±10 µA 0.4 V µA RECEIVER OUTPUTS Output Leakage Current R_OUT (MAX3222E/MAX3237E/MAX3241E/ MAX3246E), EN = VCC, receivers disabled Output Voltage Low IOUT = 1.6mA (MAX3222E/MAX3232E/MAX3241E/ MAX3246E), IOUT = 1.0mA (MAX3237E) 2 _______________________________________________________________________________________ ±15kV ESD-Protected, Down to 10nA, 3.0V to 5.5V, Up to 1Mbps, True RS-232 Transceivers (VCC = +3V to +5.5V, C1–C4 = 0.1µF, TA = TMIN to TMAX, unless otherwise noted. Typical values are at TA = +25°C.) (Notes 3, 4) PARAMETER Output Voltage High CONDITIONS IOUT = -1.0mA MIN TYP VCC 0.6 VCC 0.1 MAX UNITS V RECEIVER INPUTS Input Voltage Range -25 Input Threshold Low TA = +25°C Input Threshold High TA = +25°C +25 VCC = +3.3V 0.6 1.1 VCC = +5.0V 0.8 1.5 V VCC = +3.3V 1.5 2.4 VCC = +5.0V 2.0 2.4 Input Hysteresis 0.5 Input Resistance TA = +25°C 3 5 V V V 7 kΩ TRANSMITTER OUTPUTS Output Voltage Swing All transmitter outputs loaded with 3kΩ to ground ±5 ±5.4 Output Resistance VCC = 0, transmitter output = ±2V 300 50k Output Short-Circuit Current Output Leakage Current VCC = 0 or +3.0V to +5.5V, VOUT = ±12V, transmitters disabled (MAX3222E/MAX3232E/MAX3241E/MAX3246E) MOUSE DRIVABILITY (MAX3241E) T1IN = T2IN = GND, T3IN = VCC, T3OUT loaded with Transmitter Output Voltage 3kΩ to GND, T1OUT and T2OUT loaded with 2.5mA each ESD PROTECTION R_IN, T_OUT ±15 IEC 1000-4-2 Air-Gap Discharge (except MAX3237E) ±15 IEC 1000-4-2 Contact Discharge (except MAX3237E) ±8 MAX3237E Ω ±60 mA ±25 µA V Human Body Model IEC 1000-4-2 Contact Discharge (MAX3246E only) T_IN, R_IN, R_OUT, EN, SHDN, MBAUD ±5 V kV ±9 Human Body Model ±15 IEC1000-4-2 Air-Gap Discharge ±15 IEC1000-4-2 Contact Discharge ±8 kV _______________________________________________________________________________________ 3 MAX3222E/MAX3232E/MAX3237E/MAX3241E †/MAX3246E ELECTRICAL CHARACTERISTICS (continued) MAX3222E/MAX3232E/MAX3237E/MAX3241E †/MAX3246E ±15kV ESD-Protected, Down to 10nA, 3.0V to 5.5V, Up to 1Mbps, True RS-232 Transceivers TIMING CHARACTERISTICS—MAX3222E/MAX3232E/MAX3241E/MAX3246E (VCC = +3V to +5.5V, C1–C4 = 0.1µF, TA = TMIN to TMAX, unless otherwise noted. Typical values are at TA = +25°C.) (Notes 3, 4) PARAMETER SYMBOL Maximum Data Rate Receiver Propagation Delay tPHL tPLH Receiver Output Enable Time Receiver Output Disable Time Transmitter Skew |tPHL - tPLH| Receiver Skew |tPHL - tPLH| Transition-Region Slew Rate CONDITIONS RL = 3kΩ, CL = 1000pF, one transmitter switching MIN TA = TMIN to TMAX (MAX3222E/MAX3232E/ MAX3241E) 250 TA = +25°C (MAX3246E) 250 TYP MAX UNITS kbps 0.15 Receiver input to receiver output, CL = 150pF 0.15 Normal operation (except MAX3232E) 200 µs ns Normal operation (except MAX3232E) 200 ns (Note 6) 100 ns 50 ns VCC = +3.3V, TA = +25°C, RL = 3kΩ to 7kΩ, measured from +3.0V to –3.0V or –3.0V to +3.0V, one transmitter switching CL = 150pF to 1000pF 6 30 V/µs TIMING CHARACTERISTICS—MAX3237E (VCC = +3V to +5.5V, C1–C4 = 0.1µF, TA = TMIN to TMAX, unless otherwise noted. Typical values are at TA = +25°C.) (Note 3) PARAMETER Maximum Data Rate CONDITIONS MIN RL = 3kΩ, CL = 1000pF, one transmitter switching, MBAUD = GND 250 VCC = +3.0V to +4.5V, RL = 3kΩ, CL = 250pF, one transmitter switching, MBAUD = VCC 1000 VCC = +4.5V to +5.5V, RL = 3kΩ, CL = 1000pF, one transmitter switching, MBAUD = VCC 1000 TYP tPHL 0.15 tPLH 0.15 R_IN to R_OUT, CL = 150pF Receiver Output Enable Time Normal operation 2.6 Receiver Output Disable Time Normal operation 2.4 Receiver Skew Transition-Region Slew Rate | tPHL - tPLH |, MBAUD = GND (Note 6) | tPHL - tPLH |, MBAUD = VCC (Note 6) | tPHL - tPLH | VCC = +3.3V, RL = 3kΩ to 7kΩ, +3.0V to –3.0V or -3.0V to +3.0V, TA = +25°C CL = 150pF to 1000pF µs µs 100 ns 50 ns MBAUD = GND 6 30 MBAUD = VCC 24 150 4 30 CL = 150pF to 2500pF, MBAUD = GND UNITS kbps Receiver Propagation Delay Transmitter Skew MAX V/µs Note 3: MAX3222E/MAX3232E/MAX3241E: C1–C4 = 0.1µF tested at +3.3V ±10%; C1 = 0.047µF, C2, C3, C4 = 0.33µF tested at +5.0V ±10%. MAX3237E: C1–C4 = 0.1µF tested at +3.3V ±5%, C1–C4 = 0.22µF tested at +3.3V ±10%; C1 = 0.047µF, C2, C3, C4 = 0.33µF tested at +5.0V ±10%. MAX3246E; C1-C4 = 0.22µF tested at +3.3V ±10%; C1 = 0.22µF, C2, C3, C4 = 0.54µF tested at 5.0V ±10%. Note 4: MAX3246E devices are production tested at +25°C. All limits are guaranteed by design over the operating temperature range. Note 5: The MAX3237E logic inputs have an active positive feedback resistor. The input current goes to zero when the inputs are at the supply rails. Note 6: Transmitter skew is measured at the transmitter zero crosspoints. 4 _______________________________________________________________________________________ ±15kV ESD-Protected, Down to 10nA, 3.0V to 5.5V, Up to 1Mbps, True RS-232 Transceivers 45 MAX3237E toc02 6 4 4000 20 20kbps 15 1000 2000 3000 4000 5000 0 1000 2000 3000 4000 LOAD CAPACITANCE (pF) LOAD CAPACITANCE (pF) LOAD CAPACITANCE (pF) MAX3241E TRANSMITTER OUTPUT VOLTAGE vs. LOAD CAPACITANCE MAX3241E SLEW RATE vs. LOAD CAPACITANCE MAX3241E OPERATING SUPPLY CURRENT vs. LOAD CAPACITANCE SLEW RATE (V/µs) 1 TRANSMITTER AT 250kbps 2 TRANSMITTERS AT 15.6kbps 12 10 8 6 4 60 2000 3000 4000 5000 250kbps 40 120kbps 30 20kbps 20 10 0 1000 1 TRANSMITTER AT 250kbps 2 TRANSMITTERS AT 15.6kbps 50 2 VOUT- 5000 MAX3237E toc06 14 SUPPLY CURRENT (mA) VOUT+ 0 120kbps 25 0 0 5000 MAX3237E toc05 6 5 4 3 2 1 0 -1 -2 -3 -4 -5 -6 3000 250kbps 30 5 FOR DATA RATES UP TO 250kbps 2000 35 10 2 0 1000 T1 TRANSMITTING AT 250kbps T2 TRANSMITTING AT 15.6kbps 40 SUPPLY CURRENT (mA) +SLEW 8 MAX3237E to04 0 0 1000 2000 3000 4000 5000 0 1000 2000 3000 4000 5000 LOAD CAPACITANCE (pF) MAX3237E TRANSMITTER OUTPUT VOLTAGE vs. LOAD CAPACITANCE (MBAUD = GND) MAX3237E TRANSMITTER OUTPUT VOLTAGE vs. LOAD CAPACITANCE MAX3237E TRANSMITTER OUTPUT VOLTAGE vs. LOAD CAPACITANCE (MBAUD = VCC) VOUT+ FOR DATA RATES UP TO 250kbps 1 TRANSMITTER AT 250kbps 4 TRANSMITTERS AT 15.6kbps ALL TRANSMITTERS LOADED WITH 3kΩ + CL 2 1 0 -1 -2 -3 -4 -5 VOUT- -6 0 500 1000 1500 2000 LOAD CAPACITANCE (pF) 2500 3000 6 5 4 3 2 1 0 -1 -2 -3 -4 -5 -6 VOUT+ FOR DATA RATES UP TO 250kbps 1 TRANSMITTER 250kbps 4 TRANSMITTERS 15.6kbps ALL TRANSMITTERS LOADED WITH 3kΩ + CL 7.5 1Mbps TRANSMITTER OUTPUT VOLTAGE (V) 6 5 4 3 5.0 2Mbps MAX3237E toc08 LOAD CAPACITANCE (pF) MAX3246E toc07A LOAD CAPACITANCE (pF) TRANSMITTER OUTPUT VOLTAGE (V) TRANSMITTER OUTPUT VOLTAGE (V) -SLEW 10 VOUT- 0 TRANSMITTER OUTPUT VOLTAGE (V) SLEW RATE (V/µs) -1 -2 -3 -4 -5 -6 14 12 T1 TRANSMITTING AT 250kbps T2 TRANSMITTING AT 15.6kbps 2 1 0 16 MAX3237E toc01 VOUT+ MAX3237E toc07 TRANSMITTER OUTPUT VOLTAGE (V) 6 5 4 3 MAX3222E/MAX3232E OPERATING SUPPLY CURRENT vs. LOAD CAPACITANCE MAX3222E/MAX3232E SLEW RATE vs. LOAD CAPACITANCE MAX3237E toc03 MAX3222E/MAX3232E TRANSMITTER OUTPUT VOLTAGE vs. LOAD CAPACITANCE 1.5Mbps 2.5 1 TRANSMITTER AT FULL DATA RATE 4 TRANSMITTERS AT 1/16 DATA RATE 3kΩ + CL LOAD, EACH OUTPUT 0 -2.5 1.5Mbps 2Mbps -5.0 1Mbps VOUT-7.5 0 500 1000 1500 2000 LOAD CAPACITANCE (pF) 2500 3000 0 500 1000 1500 2000 LOAD CAPACITANCE (pF) _______________________________________________________________________________________ 5 MAX3222E/MAX3232E/MAX3237E/MAX3241E †/MAX3246E __________________________________________Typical Operating Characteristics (VCC = +3.3V, 250kbps data rate, 0.1µF capacitors, all transmitters loaded with 3kΩ and CL, TA = +25°C, unless otherwise noted.) Typical Operating Characteristics (continued) (VCC = +3.3V, 250kbps data rate, 0.1µF capacitors, all transmitters loaded with 3kΩ and CL, TA = +25°C, unless otherwise noted.) 60 -SLEW, 1Mbps +SLEW, 1Mbps -SLEW, 2Mbps +SLEW, 2Mbps 6 4 1 TRANSMITTER AT 250kbps 4 TRANSMITTERS AT 15.6kbps ALL TRANSMITTERS LOADED WITH 3kΩ + CL 2 40 30 20 1 TRANSMITTER AT FULL DATA RATE 4 TRANSMITTERS AT 1/16 DATA RATE 3kΩ + CL LOAD EACH OUTPUT 10 0 2500 0 3000 500 TRANSMITTER SKEW (ns) 80 60 40 |tPLH - tPHL| 1 TRANSMITTER AT 500kbps 4 TRANSMITTERS AT 1/16 DATA RATE ALL TRANSMITTERS LOADED WITH 3kΩ + CL 20 0 0 500 1000 1500 TRANSMITTER OUTPUT VOLTAGE (V) MAX3237E toc12 100 VOUT+ 1 TRANSMITTER AT 250kbps 4 TRANSMITTERS AT 15.6kbps ALL TRANSMITTERS LOADED WITH 3kΩ +1000pF 3.0 6 3.5 4.0 4.5 20 1 TRANSMITTER AT 250kbps 4 TRANSMITTERS AT 15.6kbps ALL TRANSMITTERS LOADED WITH 3kΩ AND 1000pF 2.0 5.0 2.5 3.0 4.0 4.5 5.0 MAX3246E OPERATING SUPPLY CURRENT vs. LOAD CAPACITANCE 60 MAX3237E toc16 MAX3237E toc15 14 12 SR- 10 3.5 SUPPLY VOLTAGE (V) 16 SLEW RATE (V/µs) LOAD CAPACITANCE (pF) 3000 0 2.5 SR+ 8 1 TRANSMITTER AT 250kbps 2 TRANSMITTERS AT 15.6kbps 55 50 45 40 250kbps 35 120kbps 30 25 20 15 20kbps 10 5 4 5000 2500 30 VOUT- 6 4000 2000 40 10 VOUT3000 1500 50 MAX3246E SLEW RATE vs. LOAD CAPACITANCE 1 TRANSMITTER AT 250kbps 2 TRANSMITTERS AT 15.6kbps 2000 1000 SUPPLY VOLTAGE (V) VOUT+ 1000 500 0 MAX3237E SUPPLY CURRENT vs. SUPPLY VOLTAGE (MBAUD = GND) 2.0 MAX3246E TRANSMITTER OUTPUT VOLTAGE vs. LOAD CAPACITANCE 0 0 2000 MAX3237E TRANSMITTER OUTPUT VOLTAGE vs. SUPPLY VOLTAGE (MBAUD = GND) LOAD CAPACITANCE (pF) 7 6 5 4 3 2 1 0 -1 -2 -3 -4 -5 -6 1 TRANSMITTER AT 20kbps, 120kbps, 250kbps 4 TRANSMITTERS AT 15.6kbps ALL TRANSMITTERS LOADED WITH 3kΩ + CL LOAD CAPACITANCE (pF) 6 5 4 3 2 1 0 -1 -2 -3 -4 -5 -6 2000 1500 20 LOAD CAPACITANCE (pF) LOAD CAPACITANCE (pF) MAX3237E TRANSMITTER SKEW vs. LOAD CAPACITANCE (MBAUD = VCC) 1000 SUPPLY CURRENT (mA) 2000 SUPPLY CURRENT (mA) 1500 MAX3237E toc13 1000 20kbps 30 10 0 500 0 120kbps MAX3237E toc14 SR+ 50 250kbps 40 MAX3237E toc17 SLEW RATE (V/µs) SLEW RATE (V/µs) SR8 50 SUPPLY CURRENT (mA) 10 MAX3237E SUPPLY CURRENT vs. LOAD CAPACITANCE WHEN TRANSMITTING DATA (MBAUD = GND) MAX3237E toc10 70 MAX3237E toc09 12 MAX3237E SLEW RATE vs. LOAD CAPACITANCE (MBAUD = VCC) MAX3237E toc11 MAX3237E SLEW RATE vs. LOAD CAPACITANCE (MBAUD = GND) TRANSMITTER OUTPUT VOLTAGE (V) MAX3222E/MAX3232E/MAX3237E/MAX3241E †/MAX3246E ±15kV ESD-Protected, Down to 10nA, 3.0V to 5.5V, Up to 1Mbps, True RS-232 Transceivers 0 0 1000 2000 3000 4000 LOAD CAPACITANCE (pF) 5000 0 1000 2000 3000 4000 LOAD CAPACITANCE (pF) _______________________________________________________________________________________ 5000 ±15kV ESD-Protected, Down to 10nA, 3.0V to 5.5V, Up to 1Mbps, True RS-232 Transceivers PIN MAX3222E SO/DIP MAX3232E TSSOP/ SO/DIP/ SSOP SSOP TSSOP MAX3241E MAX3237E SSOP/SO QFN MAX3246E NAME FUNCTION 1 1 — — 13* 23 22 B3 EN Receiver Enable. Active low. 2 2 1 2 28 28 28 F3 C1+ Positive Terminal of VoltageDoubler Charge-Pump Capacitor 3 3 2 3 27 27 27 F1 V+ +5.5V Generated by the Charge Pump 4 4 3 4 25 24 23 F4 C1- Negative Terminal of VoltageDoubler Charge-Pump Capacitor 5 5 4 5 1 1 29 E1 C2+ Positive Terminal of Inverting Charge-Pump Capacitor 6 6 5 6 3 2 30 D1 C2- Negative Terminal of Inverting Charge-Pump Capacitor 7 7 6 7 4 3 31 C1 V- 8, 15 8, 17 7, 14 8, 17 5, 6, 7, 10, 12 9, 10, 11 6, 7, 8 F6, E6, D6 T_OUT 9, 14 9, 16 8, 13 9, 16 8, 9, 11 4–8 1–5 A4, A5, A6, B6, C6 R_IN 10, 13 10, 15 9, 12 12, 15 18, 20, 21 15–19 13, 14, 15, 17, 18 C2, B1, A1, A2, A3 R_OUT TTL/CMOS Receiver Outputs 11, 12 12, 13 10, 11 13, 14 12, 13, 14 10, 11, 12 E3, E2, D2 T_IN TTL/CMOS Transmitter Inputs 16 18 15 18 17*, 19*, 22*, 23*, 24* 2 25 24 17 19 16 19 26 26 26 F5 F2 GND VCC +3.0V to +5.5V Supply Voltage 18 20 — — 14* 22 21 B2 SHDN Shutdown Control. Active low. 9, 16, 25, 32 C3, D3, B4, C4, D4, E4, B5, C5, D5, E5 N.C. No Connection. For MAX3246E, these locations are not populated with solder bumps. — 11, 14 — 1, 10, 11, 20 — — -5.5V Generated by the Charge Pump RS-232 Transmitter Outputs RS-232 Receiver Inputs Ground — — — — 15* — — — MBAUD MegaBaud Control Input. Connect to GND for normal operation; connect to VCC for 1Mbps transmission rates. — — — — 16 20, 21 19, 20 — R_OUTB Noninverting Complementary Receiver Outputs. Always active. *These pins have an active positive feedback resistor internal to the MAX3237E, allowing unused inputs to be left unconnected. _______________________________________________________________________________________ 7 MAX3222E/MAX3232E/MAX3237E/MAX3241E †/MAX3246E Pin Description MAX3222E/MAX3232E/MAX3237E/MAX3241E †/MAX3246E ±15kV ESD-Protected, Down to 10nA, 3.0V to 5.5V, Up to 1Mbps, True RS-232 Transceivers VCC VCC 0.1µF C1+ 0.1µF VCC C1+ V+ C1 C2+ C2 C2- C3 C1- MAX3222E MAX3232E MAX3237E MAX3241E MAX3246E C2+ VC2 C4 C2T_ OUT T_ IN MAX3222E MAX3232E MAX3237E MAX3241E MAX3246E C4 T_ OUT R_ IN R_ OUT 5kΩ 5kΩ 3kΩ GND V- T_ IN R_ IN R_ OUT V+ C1 C3 C1- VCC 1000pF (2500pF, MAX3237E only) MINIMUM SLEW-RATE TEST CIRCUIT GND 7kΩ 150pF MAXIMUM SLEW-RATE TEST CIRCUIT Figure 1. Slew-Rate Test Circuits Detailed Description Dual Charge-Pump Voltage Converter The MAX3222E/MAX3232E/MAX3237E/MAX3241E/ MAX3246Es’ internal power supply consists of a regulated dual charge pump that provides output voltages of +5.5V (doubling charge pump) and -5.5V (inverting charge pump) over the +3.0V to +5.5V VCC range. The charge pump operates in discontinuous mode; if the output voltages are less than 5.5V, the charge pump is enabled, and if the output voltages exceed 5.5V, the charge pump is disabled. Each charge pump requires a flying capacitor (C1, C2) and a reservoir capacitor (C3, C4) to generate the V+ and V- supplies (Figure 1). RS-232 Transmitters The transmitters are inverting level translators that convert TTL/CMOS-logic levels to ±5V EIA/TIA-232-compliant levels. The MAX3222E/MAX3232E/MAX3237E/MAX3241E/ MAX3246E transmitters guarantee a 250kbps data rate with worst-case loads of 3kΩ in parallel with 1000pF, providing compatibility with PC-to-PC communication software (such as LapLink™). Transmitters can be paralleled to drive multiple receivers or mice. The MAX3222E/MAX3237E/MAX3241E/MAX3246E transmitters are disabled and the outputs are forced into a high-impedance state when the device is in shutdown mode (SHDN = GND). The MAX3222E/ MAX3232E/MAX3237E/MAX3241E/MAX3246E permit the outputs to be driven up to ±12V in shutdown. The MAX3222E/MAX3232E/MAX3241E/MAX3246E transmitter inputs do not have pullup resistors. Connect unused inputs to GND or VCC. The MAX3237E’s transmitter inputs have a 400kΩ active positive-feedback resistor, allowing unused inputs to be left unconnected. MAX3237E MegaBaud Operation For higher-speed serial communications, the MAX3237E features MegaBaud operation. In MegaBaud operating mode (MBAUD = V CC ), the MAX3237E transmitters guarantee a 1Mbps data rate with worst-case loads of 3kΩ in parallel with 250pF for +3.0V < VCC < +4.5V. For +5V ±10% operation, the MAX3237E transmitters guarantee a 1Mbps data rate into worst-case loads of 3kΩ in parallel with 1000pF. RS-232 Receivers The receivers convert RS-232 signals to CMOS-logic output levels. The MAX3222E/MAX3237E/MAX3241E/ MAX3246E receivers have inverting three-state outputs. Drive EN high to place the receiver(s) into a highimpedance state. Receivers can be either active or inactive in shutdown (Table 1). LapLink is a trademark of Traveling Software. 8 ______________________________________________________________________________________ ±15kV ESD-Protected, Down to 10nA, 3.0V to 5.5V, Up to 1Mbps, True RS-232 Transceivers 5V/div 0 VCC PREVIOUS RS-232 PROTECTION DIODE Rx SHDN T2OUT 2V/div 0 5kΩ UART Tx GND T1OUT VCC = 3.3V C1–C4 = 0.1µF SHDN = GND 40µs/div Figure 3. Transmitter Outputs Recovering from Shutdown or Powering Up a) OLDER RS-232: POWERED-DOWN UART DRAWS CURRENT FROM A ACTIVE RECEIVER OUTPUT IN SHUTDOWN. VCC TO µP MAX3222E/MAX3237E/MAX3241E/ MAX3246E Shutdown Mode LOGIC TRANSITION DETECTOR MAX3237E/MAX3241E R1OUTB VCC PROTECTION DIODE Rx EN = VCC UART Tx GND R1IN R1OUT THREE-STATED T1IN 5kΩ T1OUT SHDN = GND b) NEW MAX3237E/MAX3241E: EN SHUTS DOWN RECEIVER OUTPUTS B (EXCEPT FOR B OUTPUTS), SO NO CURRENT FLOWS TO UART IN SHUTDOWN. B B OUTPUTS INDICATE RECEIVER ACTIVITY DURING SHUTDOWN WITH EN HIGH. Figure 2. Detection of RS-232 Activity when the UART and Interface are Shut Down; Comparison of MAX3237E/MAX3241E (b) with Previous Transceivers (a) The complementary outputs on the MAX3237E/ MAX3241E (R_OUTB) are always active, regardless of the state of EN or SHDN. This allows the device to be used for ring indicator applications without forward biasing other devices connected to the receiver outputs. This is ideal for systems where VCC drops to zero in shutdown to accommodate peripherals such as UARTs (Figure 2). Supply current falls to less than 1µA in shutdown mode (SHDN = low). The MAX3237E’s supply current falls to10nA (typ) when all receiver inputs are in the invalid range (-0.3V < R_IN < +0.3). When shut down, the device’s charge pumps are shut off, V+ is pulled down to VCC, V- is pulled to ground, and the transmitter outputs are disabled (high impedance). The time required to recover from shutdown is typically 100µs, as shown in Figure 3. Connect SHDN to VCC if shutdown mode is not used. SHDN has no effect on R_OUT or R_OUTB (MAX3237E/MAX3241E). ±15kV ESD Protection As with all Maxim devices, ESD-protection structures are incorporated to protect against electrostatic discharges encountered during handling and assembly. The driver outputs and receiver inputs of the MAX3222E/MAX3232E/MAX3237E/MAX3241E/MAX3246E have extra protection against static electricity. Maxim’s engineers have developed state-of-the-art structures to protect these pins against ESD of ±15kV without damage. The ESD structures withstand high ESD in all states: normal operation, shutdown, and powered down. After an ESD event, Maxim’s E versions keep working without latchup, whereas competing RS-232 products can latch and must be powered down to remove latchup. Furthermore, the MAX3237E logic I/O pins also have ±15kV ESD protection. Protecting the logic I/O pins to ±15kV makes the MAX3237E ideal for data cable applications. _______________________________________________________________________________________ 9 MAX3222E/MAX3232E/MAX3237E/MAX3241E †/MAX3246E VCC Table 1. MAX3222E/MAX3237E/MAX3241E/ MAX3246E Shutdown and Enable Control Truth Table SHDN EN T_OUT R_OUT R_OUTB (MAX3237E/ MAX3241E) 0 0 High-Z Active Active 0 1 High-Z High-Z Active 1 0 Active Active Active 1 1 Active High-Z Active RC 1MΩ CHARGE-CURRENT LIMIT RESISTOR HIGHVOLTAGE DC SOURCE Cs 100pF ESD protection can be tested in various ways; the transmitter outputs and receiver inputs for the MAX3222E/MAX3232E/MAX3241E/MAX3246E are characterized for protection to the following limits: • ±15kV using the Human Body Model • ±8kV using the Contact Discharge method specified in IEC 1000-4-2 • ±9kV (MAX3246E only) using the Contact Discharge method specified in IEC 1000-4-2 • ±15kV using the Air-Gap Discharge method specified in IEC 1000-4-2 RD 1500Ω IP 100% 90% DISCHARGE RESISTANCE STORAGE CAPACITOR DEVICE UNDER TEST Ir PEAK-TO-PEAK RINGING (NOT DRAWN TO SCALE) AMPERES 36.8% 10% 0 0 TIME tRL tDL CURRENT WAVEFORM Figure 4b. Human Body Model Current Waveform Figure 4a. Human Body ESD Test Model I 100% RC 50MΩ to 100MΩ CHARGE-CURRENT LIMIT RESISTOR HIGHVOLTAGE DC SOURCE Cs 150pF RD 330Ω 90% DISCHARGE RESISTANCE STORAGE CAPACITOR I PEAK MAX3222E/MAX3232E/MAX3237E/MAX3241E †/MAX3246E ±15kV ESD-Protected, Down to 10nA, 3.0V to 5.5V, Up to 1Mbps, True RS-232 Transceivers DEVICE UNDER TEST 10% t r = 0.7ns to 1ns t 30ns 60ns Figure 5a. IEC 1000-4-2 ESD Test Model 10 Figure 5b. IEC 1000-4-2 ESD Generator Current Waveform ______________________________________________________________________________________ C1 (µF) C2, C3, C4 (µF) MAX3222E/MAX3232E/MAX3241E 3.0 to 3.6 0.1 0.1 4.5 to 5.5 0.047 0.33 3.0 to 5.5 0.1 0.47 MAX3237E/MAX3246E 3.0 to 3.6 0.22 0.22 3.15 to 3.6 0.1 0.1 4.5 to 5.5 0.047 0.33 3.0 to 5.5 0.22 1.0 Table 3. Logic-Family Compatibility with Various Supply Voltages 5 4 VOUT+ VCC = 3.0V 3 2 VOUT+ 1 0 -1 -2 VCC -3 -4 VOUTVOUT- -5 -6 0 1 2 3 4 5 6 7 8 9 10 LOAD CURRENT PER TRANSMITTER (mA) Figure 6a. MAX3241E Transmitter Output Voltage vs. Load Current Per Transmitter IEC 1000-4-2 SYSTEM POWER-SUPPLY VOLTAGE (V) VCC SUPPLY VOLTAGE (V) 3.3 3.3 Compatible with all CMOS families 5 5 Compatible with all TTL and CMOS families 5 TRANSMITTER OUTPUT VOLTAGE (V) VCC (V) 6 3.3 COMPATIBILITY Compatible with ACT and HCT CMOS, and with AC, HC, or CD4000 CMOS For the MAX3237E, all logic and RS-232 I/O pins are characterized for protection to ±15kV per the Human Body Model. ESD Test Conditions ESD performance depends on a variety of conditions. Contact Maxim for a reliability report that documents test setup, test methodology, and test results. Human Body Model Figure 4a shows the Human Body Model, and Figure 4b shows the current waveform it generates when discharged into a low impedance. This model consists of a 100pF capacitor charged to the ESD voltage of interest, which is then discharged into the test device through a 1.5kΩ resistor. The IEC 1000-4-2 standard covers ESD testing and performance of finished equipment; it does not specifically refer to integrated circuits. The MAX3222E/ MAX3232E/MAX3237E/MAX3241E/MAX3246E help you design equipment that meets level 4 (the highest level) of IEC 1000-4-2, without the need for additional ESDprotection components. The major difference between tests done using the Human Body Model and IEC 1000-4-2 is higher peak current in IEC 1000-4-2, because series resistance is lower in the IEC 1000-4-2 model. Hence, the ESD withstand voltage measured to IEC 1000-4-2 is generally lower than that measured using the Human Body Model. Figure 5a shows the IEC 1000-4-2 model, and Figure 5b shows the current waveform for the ±8kV IEC 1000-4-2 level 4 ESD Contact Discharge test. The AirGap Discharge test involves approaching the device with a charged probe. The Contact Discharge method connects the probe to the device before the probe is energized. Machine Model The Machine Model for ESD tests all pins using a 200pF storage capacitor and zero discharge resistance. Its objective is to emulate the stress caused by contact that occurs with handling and assembly during manufacturing. All pins require this protection during manufacturing, not just RS-232 inputs and outputs. Therefore, after PC board assembly, the Machine Model is less relevant to I/O ports. ______________________________________________________________________________________ 11 MAX3222E/MAX3232E/MAX3237E/MAX3241E †/MAX3246E Table 2. Required Minimum Capacitor Values MAX3222E-fig06a ±15kV ESD-Protected, Down to 10nA, 3.0V to 5.5V, Up to 1Mbps, True RS-232 Transceivers MAX3222E/MAX3232E/MAX3237E/MAX3241E †/MAX3246E ±15kV ESD-Protected, Down to 10nA, 3.0V to 5.5V, Up to 1Mbps, True RS-232 Transceivers VCC = +3.0V TO +5.5V 28 C1 C2 C1+ 24 C1- 1 C2+ 2 CBYPASS 26 VCC V+ 27 C3 COMPUTER SERIAL PORT V- MAX3241E 3 C4 14 C2T1IN T1OUT 9 13 T2IN T2OUT 10 12 T3IN T3OUT 11 21 R1OUTB 20 R2OUTB 19 R1OUT 18 R2OUT 5kΩ R2IN 5 17 R3OUT 5kΩ R3IN 6 16 R4OUT 5kΩ R4IN 7 15 R5OUT 23 EN +V +V VCC -V GND Tx R1IN 4 MOUSE 5kΩ R5IN 8 5kΩ SHDN GND 25 22 VCC Figure 6b. Mouse Driver Test Circuit Applications Information Capacitor Selection The capacitor type used for C1–C4 is not critical for proper operation; polarized or nonpolarized capacitors can be used. The charge pump requires 0.1µF capacitors for 3.3V operation. For other supply voltages, see Table 2 for required capacitor values. Do not use values smaller than those listed in Table 2. Increasing the capacitor values (e.g., by a factor of 2) reduces ripple on the transmitter outputs and slightly reduces power consumption. C2, C3, and C4 can be increased without changing C1’s value. However, do not increase C1 without also increasing the values of C2, C3, C4, and CBYPASS to maintain the proper ratios (C1 to the other capacitors). When using the minimum required capacitor values, make sure the capacitor value does not degrade 12 excessively with temperature. If in doubt, use capacitors with a larger nominal value. The capacitor’s equivalent series resistance (ESR), which usually rises at low temperatures, influences the amount of ripple on V+ and V-. Power-Supply Decoupling In most circumstances, a 0.1µF VCC bypass capacitor is adequate. In applications sensitive to power-supply noise, use a capacitor of the same value as chargepump capacitor C1. Connect bypass capacitors as close to the IC as possible. Operation Down to 2.7V Transmitter outputs meet EIA/TIA-562 levels of ±3.7V with supply voltages as low as 2.7V. ______________________________________________________________________________________ ±15kV ESD-Protected, Down to 10nA, 3.0V to 5.5V, Up to 1Mbps, True RS-232 Transceivers Figure 3 shows two transmitter outputs recovering from shutdown mode. As they become active, the two transmitter outputs are shown going to opposite RS-232 levels (one transmitter input is high; the other is low). Each transmitter is loaded with 3kΩ in parallel with 2500pF. The transmitter outputs display no ringing or undesirable transients as they come out of shutdown. Note that the transmitters are enabled only when the magnitude of V- exceeds approximately -3.0V. Mouse Drivability The MAX3241E is designed to power serial mice while operating from low-voltage power supplies. It has been tested with leading mouse brands from manufacturers such as Microsoft and Logitech. The MAX3241E successfully drove all serial mice tested and met their current and voltage requirements. VCC 0.1µF T1IN 5V/div T1OUT 5V/div VCC C1+ V+ C3 C1 C1- MAX3222E MAX3232E MAX3237E MAX3241E MAX3246E C2+ C2 C2- VC4 VCC = 3.3V, C1–C4 = 0.1µF T_ OUT T_ IN 5V/div R1OUT 2µs/div R_ IN R_ OUT 5kΩ Figure 9. MAX3241E Loopback Test Result at 250kbps 1000pF GND +5V T_IN 0 Figure 7. Loopback Test Circuit +5V T_OUT 5kΩ + 250pF 0 -5V +5V 5V/div T1IN VCC = 3.3V C1–C4 = 0.1µF R_OUT 0 400ns/div 5V/div T1OUT R1OUT Figure 10. MAX3237E Loopback Test Result at 1000kbps (MBAUD = VCC) 5V/div VCC = 3.3V C1–C4 = 0.1µF 2µs/div Figure 8. MAX3241E Loopback Test Result at 120kbps ______________________________________________________________________________________ 13 MAX3222E/MAX3232E/MAX3237E/MAX3241E †/MAX3246E Transmitter Outputs Recovering from Shutdown MAX3222E/MAX3232E/MAX3237E/MAX3241E †/MAX3246E ±15kV ESD-Protected, Down to 10nA, 3.0V to 5.5V, Up to 1Mbps, True RS-232 Transceivers Figure 6a shows the transmitter output voltages under increasing load current at +3.0V. Figure 6b shows a typical mouse connection using the MAX3241E. High Data Rates The MAX3222E/MAX3232E/MAX3237E/MAX3241E/ MAX3246E maintain the RS-232 ±5V minimum transmitter output voltage even at high data rates. Figure 7 shows a transmitter loopback test circuit. Figure 8 shows a loopback test result at 120kbps, and Figure 9 shows the same test at 250kbps. For Figure 8, all transmitters were driven simultaneously at 120kbps into RS232 loads in parallel with 1000pF. For Figure 9, a single transmitter was driven at 250kbps, and all transmitters were loaded with an RS-232 receiver in parallel with 1000pF. The MAX3237E maintains the RS-232 ±5.0V minimum transmitter output voltage at data rates up to 1Mbps. Figure 10 shows a loopback test result at 1Mbps with MBAUD = VCC. For Figure 10, all transmitters were loaded with an RS-232 receiver in parallel with 250pF. Interconnection with 3V and 5V Logic The MAX3222E/MAX3232E/MAX3237E/MAX3241E/ MAX3246E can directly interface with various 5V logic families, including ACT and HCT CMOS. See Table 3 for more information on possible combinations of interconnections. UCSP Reliability The UCSP represents a unique packaging form factor that may not perform equally to a packaged product through traditional mechanical reliability tests. UCSP reliability is integrally linked to the user’s assembly methods, circuit board material, and usage environment. The user should closely review these areas when considering use of a UCSP package. Performance through Operating Life Test and Moisture Resistance remains uncompromised as the wafer-fabrication process primarily determines it. Mechanical stress performance is a greater consideration for a UCSP package. UCSPs are attached through direct solder contact to the user’s PC board, foregoing the inherent stress relief of a packaged product lead frame. Solder joint contact integrity must be considered. Table 4 shows the testing done to characterize the UCSP reliability performance. In conclusion, the UCSP is capable of performing reliably through environmental stresses as indicated by the results in the table. Additional usage data and recommendations are detailed in the UCSP application note, which can be found on Maxim’s website at www.maxim-ic.com. Table 4. Reliability Test Data TEST CONDITIONS DURATION FAILURES PER SAMPLE SIZE 150 cycles, 900 cycles 0/10, 0/200 Temperature Cycle TA = -35°C to +85°C, TA = -40°C to +100°C Operating Life TA = +70°C 240 hours 0/10 Moisture Resistance TA = +20°C to +60°C, 90% RH 240 hours 0/10 Low-Temperature Storage TA = -20°C 240 hours 0/10 Low-Temperature Operational TA = -10°C 24 hours 0/10 Solderability 8-hour steam age — 0/15 ESD ±15kV, Human Body Model — 0/5 High-Temperature Operating Life TJ = +150°C 168 hours 0/45 14 ______________________________________________________________________________________ ±15kV ESD-Protected, Down to 10nA, 3.0V to 5.5V, Up to 1Mbps, True RS-232 Transceivers TOP VIEW EN 1 18 SHDN C1+ 2 17 VCC V+ 3 16 GND C1- 4 C2+ 5 MAX3222E EN 1 C1+ 2 V+ 3 15 T1OUT C1- 4 14 R1IN C2+ 5 MAX3222E 20 SHDN N.C. 1 20 N.C. C1+ 1 16 VCC 19 VCC C1+ 2 19 VCC V+ 2 15 GND 18 GND V+ 3 18 GND C1- 3 17 T1OUT C2+ 4 16 R1IN C2- 5 17 T1OUT C1- 4 16 R1IN C2+ 5 15 R1OUT C2- 6 MAX3232E 15 R1OUT 14 T1OUT MAX3232E 13 R1IN 12 R1OUT C2- 6 13 R1OUT V- 6 11 T1IN V- 7 12 T1IN V- 7 14 N.C. V- 7 14 T1IN T2OUT 7 10 T2IN T2OUT 8 11 T2IN T2OUT 8 13 T1IN T2OUT 8 13 T2IN R2IN 8 R2IN 9 10 R2OUT R2IN 9 12 T2IN R2IN 9 12 R2OUT R2OUT 10 11 N.C. N.C. 10 11 N.C. C2- 6 9 R2OUT SSOP/SO/DIP SO/DIP N.C. V- C2- C2+ C1+ V+ VCC N.C. 31 30 29 28 27 26 25 TOP VIEW 28 C1+ C2+ 1 2 27 V+ C2- 2 27 V+ 3 26 VCC V- 3 26 VCC V- 4 25 C1- R1IN 4 25 GND R1IN 1 24 GND T1OUT 5 24 T1IN R2IN 5 24 C1- R2IN 2 23 C1- 23 EN R3IN 3 22 EN R4IN 4 21 SHDN C2+ 1 GND C2- T2OUT MAX3237E 6 23 T2IN R3IN 6 28 C1+ 32 TSSOP TSSOP/SSOP MAX3241E T3OUT 7 22 T3IN R4IN 7 22 SHDN R1IN 8 21 R1OUT R5IN 8 21 R1OUTB R5IN 5 20 R1OUTB 20 R2OUTB T1OUT 6 19 R2OUTB 19 R1OUT T2OUT 7 18 R1OUT T3OUT 11 18 R2OUT T3OUT 8 17 R2OUT SSOP SSOP/SO/TSSOP 15 16 15 R5OUT N.C. T1IN 14 R3OUT 15 MBAUD 14 SHDN 14 13 16 R4OUT R4OUT 17 R3OUT T2IN 13 R5OUT T3IN 12 16 R1OUTB 12 17 T5IN EN 13 T5OUT 12 T1IN 18 R3OUT R3IN 11 11 T2OUT 10 10 19 T4IN 9 T2IN T1OUT T3IN T4OUT 10 20 R2OUT 9 9 N.C. R2IN MAX3241E QFN ______________________________________________________________________________________ 15 MAX3222E/MAX3232E/MAX3237E/MAX3241E †/MAX3246E __________________________________________________________Pin Configurations ±15kV ESD-Protected, Down to 10nA, 3.0V to 5.5V, Up to 1Mbps, True RS-232 Transceivers MAX3222E/MAX3232E/MAX3237E/MAX3241E †/MAX3246E Pin Configurations (continued) TOP VIEW (BUMPS ON BOTTOM) B2: SHDN C2: R1OUT D2: T3IN E2: T2IN B3: EN E3: T1IN BUMPS B4, B5, C3, C4, C5, D3, D4, D5, E4, AND E5 NOT POPULATED R4OUT R5OUT R1IN R2IN R3OUT A1 A2 A3 A4 A5 R2OUT B1 B2 B3 V- C1 C2 A6 R3IN B6 R4IN C6 R5IN MAX3246E C2- D1 D2 C2+ E1 E2 E3 V+ F1 F2 F3 F4 F5 VCC C1+ C1- GND D6 T3OUT E6 T2OUT F6 T1OUT UCSP 16 ______________________________________________________________________________________ ±15kV ESD-Protected, Down to 10nA, 3.0V to 5.5V, Up to 1Mbps, True RS-232 Transceivers +3.3V +3.3V 17 CBYPASS C1 0.1µF 2 C1+ 4 5 C2 0.1µF 6 C1- V+ MAX3222E C2+ V- 3 C3* 0.1µF C1 0.1µF C4 0.1µF C2 0.1µF 7 C2- 12 T1IN 10 R2OUT 1 R2IN 9 V- GND 16 SHDN C3* 0.1µF 6 C4 0.1µF T1OUT 14 RS-232 OUTPUTS T2OUT 7 R1IN 13 TTL/CMOS OUTPUTS 5kΩ 9 R2OUT RS-232 INPUTS R2IN 8 5kΩ EN 2 C2- 12 R1OUT RS-232 INPUTS 5kΩ MAX3232E C2+ 10 T2IN R1IN 14 TTL/CMOS OUTPUTS 5 C1- V+ TTL/CMOS INPUTS T2OUT 8 13 R1OUT 3 VCC 11 T1IN RS-232 OUTPUTS TTL/CMOS INPUTS 1 C1+ 4 T1OUT 15 11 T2IN 16 CBYPASS VCC 5kΩ 18 GND 15 *C3 CAN BE RETURNED TO EITHER VCC OR GROUND. NOTE: PIN NUMBERS REFER TO SO/DIP PACKAGES. SEE TABLE 2 FOR CAPACITOR SELECTION. ______________________________________________________________________________________ 17 MAX3222E/MAX3232E/MAX3237E/MAX3241E †/MAX3246E __________________________________________________Typical Operating Circuits MAX3222E/MAX3232E/MAX3237E/MAX3241E †/MAX3246E ±15kV ESD-Protected, Down to 10nA, 3.0V to 5.5V, Up to 1Mbps, True RS-232 Transceivers _____________________________________Typical Operating Circuits (continued) +3.3V +3.3V CBYPASS 28 C1+ CBYPASS 26 VCC 27 V+ 0.1µF 25 1 0.1µF 3 C1- V- C1 0.1µF 0.1µF C2 0.1µF 4 23 T2IN 22 T3IN 19 T4IN T1 T2 T3 T4 T1OUT 5 T2OUT 6 T3OUT 7 28 C1+ 24 1 C2- 24 T1IN LOGIC INPUTS MAX3237E C2+ C3* 0.1µF TTL/CMOS INPUTS RS-232 OUTPUTS 2 C1- 26 VCC 27 V+ MAX3241E C2+ V- C3* 0.1µF 3 C4 0.1µF C2- 14 T1IN T1OUT 9 13 T2IN T2OUT 10 12 T3IN T3OUT 11 RS-232 OUTPUTS 21 R1OUTB T4OUT 10 20 R2OUTB 17 T5IN T5 T5OUT 12 19 R1OUT R1IN 4 16 R1OUTB 5kΩ R2IN 18 R2OUT 21 R1OUT TTL/CMOS OUTPUTS 5kΩ LOGIC OUTPUTS 20 R2OUT 5 R1IN 8 R1 R2IN R2 9 RS-232 INPUTS 5kΩ 17 R3OUT R3IN 6 5kΩ 5kΩ 18 R3OUT R3IN 11 R3 16 R4OUT R4IN 7 5kΩ 5kΩ 15 R5OUT MBAUD 13 EN GND SHDN R5IN 8 15 14 2 5kΩ 23 EN GND SHDN 25 *C3 CAN BE RETURNED TO EITHER VCC OR GROUND. 18 ______________________________________________________________________________________ 22 RS-232 INPUTS ±15kV ESD-Protected, Down to 10nA, 3.0V to 5.5V, Up to 1Mbps, True RS-232 Transceivers +3.3V CBYPASS C1 0.1µF F3 C1+ F4 E1 C2 0.1µF TTL/CMOS INPUTS D1 C1- F2 VCC F1 V+ MAX3246E C2+ V- C3* 0.1µF C1 C4 0.1µF C2- E3 T1IN T1OUT F6 E2 T2IN T2OUT E6 D2 T3IN T3OUT D6 C2 R1OUT RS-232 OUTPUTS R1IN A4 5kΩ R2IN B1 R2OUT A5 5kΩ TTL/CMOS OUTPUTS A1 R3OUT R3IN A6 RS-232 INPUTS 5kΩ A2 R4OUT R4IN B6 5kΩ A3 R5OUT R5IN C6 5kΩ B3 EN GND SHDN B2 F5 *C3 CAN BE RETURNED TO EITHER VCC OR GROUND. ______________________________________________________________________________________ 19 MAX3222E/MAX3232E/MAX3237E/MAX3241E †/MAX3246E _____________________________________Typical Operating Circuits (continued) MAX3222E/MAX3232E/MAX3237E/MAX3241E †/MAX3246E ±15kV ESD-Protected, Down to 10nA, 3.0V to 5.5V, Up to 1Mbps, True RS-232 Transceivers Selector Guide PART NO. OF GUARANTEED LOW-POWER DRIVERS/ DATA RATE SHUTDOWN RECEIVERS (bps) Ordering Information (continued) PART TEMP RANGE PIN-PACKAGE 0°C to +70°C 18 Wide SO MAX3222ECPN 0°C to +70°C 18 Plastic DIP MAX3222EC/D 0°C to +70°C Dice* MAX3222EEUP -40°C to +85°C 20 TSSOP MAX3222EEAP -40°C to +85°C 20 SSOP MAX3222EEWN -40°C to +85°C 18 Wide SO MAX3222EEPN -40°C to +85°C 18 Plastic DIP MAX3232ECAE 0°C to +70°C 16 SSOP MAX3232ECWE 0°C to +70°C 16 Wide SO MAX3232ECPE 0°C to +70°C 16 Plastic DIP MAX3232ECUP 0°C to +70°C 20 TSSOP ___________________ Chip Information MAX3232EEAE -40°C to +85°C 16 SSOP TRANSISTOR COUNT: MAX3222E/MAX3232E: 1129 MAX3232EEWE -40°C to +85°C 16 Wide SO MAX3232EEPE -40°C to +85°C 16 Plastic DIP MAX3232EEUP -40°C to +85°C 20 TSSOP MAX3237ECAI 0°C to +70°C 28 SSOP MAX3237EEAI -40°C to +85°C 28 SSOP MAX3222E 2/2 ✔ 250k MAX3232E 2/2 — 250k MAX3237E (Normal) 5/3 ✔ 250k MAX3237E (MegaBaud) 5/3 MAX3241E 3/5 ✔ 250k MAX3246E 3/5 ✔ 250k MAX3237E: 2110 MAX3241E: 1335 MAX3246E: 842 ✔ 1M MAX3222ECWN MAX3241ECAI 0°C to +70°C 28 SSOP MAX3241ECWI 0°C to +70°C 28 Wide SO MAX3241ECUI 0°C to +70°C 28 TSSOP 0°C to +70°C 32 QFN MAX3241ECGJ MAX3241EEAI -40°C to +85°C 28 SSOP MAX3241EEWI -40°C to +85°C 28 Wide SO MAX3241EEUI -40°C to +85°C 28 TSSOP MAX3246ECBX-T 0°C to +70°C 6 x 6 UCSP* MAX3246EEBX-T -40°C to +85°C 6 x 6 UCSP* *Requires solder temperature profile described in the Absolute Maximum Ratings section. UCSP Reliability is integrally linked to the user’s assembly methods, circuit board material, and environment. Refer to the UCSP Reliability Notice in the UCSP Reliability section of this datasheet for more information. 20 ______________________________________________________________________________________ ±15kV ESD-Protected, Down to 10nA, 3.0V to 5.5V, Up to 1Mbps, True RS-232 Transceivers TSSOP4.40mm.EPS ______________________________________________________________________________________ 21 MAX3222E/MAX3232E/MAX3237E/MAX3241E †/MAX3246E Package Information (The package drawing(s) in this data sheet may not reflect the most current specifications. For the latest package outline information, go to www.maxim-ic.com/packages.) Package Information (continued) (The package drawing(s) in this data sheet may not reflect the most current specifications. For the latest package outline information, go to www.maxim-ic.com/packages.) 36L,UCSP.EPS MAX3222E/MAX3232E/MAX3237E/MAX3241E †/MAX3246E ±15kV ESD-Protected, Down to 10nA, 3.0V to 5.5V, Up to 1Mbps, True RS-232 Transceivers Maxim cannot assume responsibility for use of any circuitry other than circuitry entirely embodied in a Maxim product. No circuit patent licenses are implied. Maxim reserves the right to change the circuitry and specifications without notice at any time. 22 ____________________Maxim Integrated Products, 120 San Gabriel Drive, Sunnyvale, CA 94086 408-737-7600 © 2003 Maxim Integrated Products Printed USA is a registered trademark of Maxim Integrated Products.