ABRIDGED DATA SHEET 19-3375; Rev 0; 7/04 Dual SPDT Analog Switches with Over-Rail Signal Handling The MAX4850/MAX4850H/MAX4852/MAX4852H family of dual SPDT (single-pole/double-throw) switches operate from a single +2V to +5.5V supply and can handle signals greater than the supply rail. These switches feature low 3.5 or 3.5/7 on-resistance with low oncapacitance, making them ideal for switching audio and data signals. The MAX4850/MAX4850H are configured with two SPDT switches and feature two comparators for headphone detection or mute/send key functions. The MAX4852 has two SPDT switches with no comparators for low 1A supply current. For over-rail applications, these devices offer either the pass-through or high-impedance option. For the MAX4850/MAX4852, the signal (up to 5.5V) passes through the switch without distortion even when the positive supply rail is exceeded. For the MAX4850H/ MAX4852H, the switch input becomes high impedance when the input signal exceeds the supply rail. The MAX4850/MAX4850H/MAX4852/MAX4852H are available in the space-saving (3mm x 3mm), 16-pin TQFN package and operate over the extended temperature range of -40C to +85C. Features USB 2.0 Full Speed (12MB) and USB 1.1 Signal Switching Compliant Switch Signals Greater than VCC 0.1ns Differential Skew 3.5/7 On-Resistance 135MHz -3dB Bandwidth +2V to +5.5V Supply Range 1.8V Logic Compatible Low Supply Current 1A (MAX4852) 5A (MAX4850) 10A (MAX4850H/MAX4852H) Available in a Space-Saving (3mm x 3mm), 16-Pin TQFN Package Ordering Information PART Applications TEMP RANGE PIN-PACKAGE TOP MARK MAX4850ETE -40C to +85C 16 TQFN-EP* ABU USB Switching MAX4850HETE -40C to +85C 16 TQFN-EP* ABV Audio-Signal Routing MAX4852ETE -40C to +85C 16 TQFN-EP* ABZ MAX4852HETE -40C to +85C *EP = Exposed paddle. 16 TQFN-EP* ACA Cellular Phones Notebook Computers Pin Configurations and Selector Guide appear at end of data sheet. PDAs and Other Handheld Devices Block Diagrams/Truth Table NC1 MAX4850 MAX4850H MAX4850_ MAX4852_ MAX4852 MAX4852H NC1 3.5 COM1 3.5 NO1 IN1 NC2 IN2 COM1 NO1 7 IN_ NO_ 0 OFF NC_ ON 1 ON OFF IN1 SWITCHES SHOWN FOR 3.5 NO2 7 LOGIC 0 INPUT COM2 3.5 NO2 NC2 IN2 COM2 VCC 3 COUT1 CIN1 VCC 3 COUT2 CIN2 ________________________________________________________________ Maxim Integrated Products For pricing, delivery, and ordering information, please contact Maxim Direct at 1-888-629-4642, or visit Maxim's website at www.maxim-ic.com. 1 MAX4850/MAX4850H/MAX4852/MAX4852H General Description ABRIDGED DATA SHEET Dual SPDT Analog Switches with Over-Rail Signal Handling The MAX4850/MAX4850H/MAX4852/MAX4852H are low on-resistance, low-voltage, analog switches that operate from a +2V to +5.5V single supply and are fully specified for nominal 3.0V applications. These devices feature over-rail signal capability that allows signals up to 5.5V with supply voltages down to 2.0V. These devices are configured as dual SPDT switches. These switches have low 50pF on-channel capacitance, which allows for 12Mbps switching of the data signals for USB 2.0 full speed/1.1 applications. The MAX485_ _ are designed to switch D+ and D- USB signals with a guaranteed skew of less than 1ns (see Figure 1), as measured from 50% of the input signal to 50% of the output signal. The MAX4850_ feature a comparator that can be used for headphone or mute detection. The comparator threshold is internally generated to be approximately 1/3 of VCC. Applications Information Digital Control Inputs The logic inputs (IN_) accept up to +5.5V even if the supply voltages are below this level. For example, with a +3.3V VCC supply, IN_ can be driven low to GND and high to +5.5V, allowing for mixing of logic levels in a system. Driving IN_ rail-to-rail minimizes power con- sumption. For a +2V supply voltage, the logic thresholds are 0.5V (low) and 1.4V (high); for a +5V supply voltage, the logic thresholds are 0.8V (low) and 1.8V (high). Analog Signal Levels The on-resistance of these switches changes very little for analog input signals across the entire supply voltage range (see Typical Operating Characteristics). The switches are bidirectional, so NO_, NC_, and COM_ can be either inputs or outputs. Comparator The positive terminal of the comparator is internally set to VCC/3. When the negative terminal (CIN_) is below the threshold (VCC/3), the comparator output (COUT_) goes high. When CIN_ rises above VCC/3, COUT_ goes low. The comparator threshold allows for detection of headphones since headphone audio signals are typically biased to VCC/2. Power-Supply Sequencing Caution: Do not exceed the absolute maximum ratings because stresses beyond the listed ratings may cause permanent damage to the device. Proper power-supply sequencing is recommended for all CMOS devices. Always apply VCC before applying analog signals, especially if the analog signal is not current-limited. ______________________________________________________________________________________ 11 MAX4850/MAX4850H/MAX4852/MAX4852H Detailed Description ABRIDGED DATA SHEET MAX4850/MAX4850H/MAX4852/MAX4852H Dual SPDT Analog Switches with Over-Rail Signal Handling Test Circuits/Timing Diagrams MAX4850_ MAX4852_ VCC LOGIC INPUT V CC VNO COM_ NO_ t R < 20ns t F < 20ns VCC 50% 0V VOUT RL t OFF SWITCH OUTPUT CL VOUT 0.9 x V0UT 0.9 x VOUT 0V IN_ t ON GND LOGIC INPUT SWITCH INPUT CL INCLUDES FIXTURE AND STRAY CAPACITANCE. RL VOUT = VNO RL + RON ( VCC + 0.5V tHIZB ) tHIZ HIGH-Z MODE NORMAL MODE NORMAL MODE IN DEPENDS ON SWITCH CONFIGURATION; INPUT POLARITY DETERMINED BY SENSE OF SWITCH. Figure 1. Switching Time tri 90% 50% A TxD+ B Rs INPUT A 10% tskew_i CL INPUT A- 90% 50% 10% tfi tro A- TxDRs Rs = 39 CL = 50pF B- OUTPUT B 10% 90% 50% tskew_o CL OUTPUT B- 90% 50% 10% tfo |tro - tri| DELAY DUE TO SWITCH FOR RISING INPUT AND RISING OUTPUT SIGNALS. |tfo - tfi| DELAY DUE TO SWITCH FOR FALLING INPUT AND FALLING OUTPUT SIGNALS. |tskew_o| CHANGE IN SKEW THROUGH THE SWITCH FOR OUTPUT SIGNALS. |tskew_i| CHANGE IN SKEW THROUGH THE SWITCH FOR INPUT SIGNALS. Figure 2. Input/Output Skew Timing Diagram 12 ______________________________________________________________________________________ ABRIDGED DATA SHEET Dual SPDT Analog Switches with Over-Rail Signal Handling LOGIC INPUT V CC VCC 50% 0V NC_ VN_ MAX4850/MAX4850H/MAX4852/MAX4852H V CC MAX4850_ MAX4852_ VOUT COM_ NO_ RL CL IN_ LOGIC INPUT GND 0.9 x VOUT VOUT tBBM CL INCLUDES FIXTURE AND STRAY CAPACITANCE. Figure 3. Break-Before-Make Interval V CC MAX4850_ MAX4852_ VOUT VCC RGEN VOUT COM_ NC_ OR NO_ VOUT IN OFF CL V GEN GND OFF ON IN_ VIL TO VIH OFF IN ON OFF Q = (V OUT )(C L ) LOGIC-INPUT WAVEFORMS INVERTED FOR SWITCHES THAT HAVE THE OPPOSITE LOGIC SENSE. Figure 4. Charge Injection +5V 10nF V OFF-ISOLATION = 20log OUT VIN NETWORK ANALYZER VCC 0V OR VCC NC1 50 COM1 IN_ MAX4850_ MAX4852_ 50 VIN V ON-LOSS = 20log OUT VIN 50 CROSSTALK = 20log NO1* GND VOUT MEAS 50 MEASUREMENTS ARE STANDARDIZED AGAINST SHORTS AT IC TERMINALS. OFF-ISOLATION IS MEASURED BETWEEN COM_ AND "OFF", NO_ OR NC_ TERMINAL ON EACH SWITCH. ON-LOSS IS MEASURED BETWEEN COM_ AND "ON", NO_ OR NC_ TERMINAL ON EACH SWITCH. CROSSTALK IS MEASURED FROM ONE CHANNEL TO THE OTHER CHANNEL. SIGNAL DIRECTION THROUGH SWITCH IS REVERSED; WORST VALUES ARE RECORDED. REF VOUT VIN 50 *FOR CROSSTALK THIS PIN IS NO2. NC2 AND COM2 ARE OPEN. Figure 5. On-Loss, Off-Isolation, and Crosstalk ______________________________________________________________________________________ 13 ABRIDGED DATA SHEET MAX4850/MAX4850H/MAX4852/MAX4852H Dual SPDT Analog Switches with Over-Rail Signal Handling 10nF V CC VCC COM_ MAX4850_ MAX4852_ IN CAPACITANCE METER VIL OR VIH NC_ OR NO_ f = 1MHz GND Figure 6. Channel Off-/On-Capacitance tR < 20ns tF < 20ns MAX4850_ VTH + 100mV VCC NO_ VCC 3 50% 50% VTH - 100mV COUT_ VCIN_ COMPARATOR INPUT (VCIN_) VCC CIN_ GND VTH = VCC/3 VOUT VCOUT_ COMPARATOR OUTPUT (VCOUT_) tCOMP tCOMP 50% 0V Figure 7. Comparator Switching Time 14 ______________________________________________________________________________________ 50% ABRIDGED DATA SHEET Dual SPDT Analog Switches with Over-Rail Signal Handling 4 IN1 VCC COUT2 NC1 IN1 VCC N.C. 14 13 MAX4850 MAX4850H 12 NO2 N.C. 1 11 COUT1 N.C. 2 10 COM2 9 NO1 5 IN2 N.C. 3 COM1 4 12 NO2 11 N.C. MAX4852 MAX4852H 10 COM2 9 6 7 8 5 THIN QFN 6 7 IN2 8 N.C. COM1 15 NC2 3 16 GND CIN2 13 NO1 2 14 N.C. CIN1 15 NC2 1 16 GND N.C. NC1 TOP VIEW THIN QFN CONNECT EXPOSED PADDLE TO GROUND. Typical Operating Circuit Selector Guide PART RON NC_/NO_ COMPARATORS () OVER-RAIL HANDLING MAX4850 3.5/3.5 2 Input signal passes through the switch MAX4850H 3.5/3.5 2 High-impedance switch input MAX4852 3.5/7 -- Input signal passes through the switch MAX4852H 3.5/7 -- High-impedance switch input OUT+ NC1 DATA SOURCE MAX4850_ OUT- COM1 NO1 IN1 NC2 IN2 COM2 OUT+ AUDIO SOURCE OUT- NO2 MUTE Chip Information TRANSISTOR COUNT: 735 PROCESS: CMOS INPUT SELECT VCC VCC 3 COUT CIN MUTE BUTTON ______________________________________________________________________________________ 15 MAX4850/MAX4850H/MAX4852/MAX4852H Pin Configurations ABRIDGED DATA SHEET 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.) (NE - 1) X e E MARKING 12x16L QFN THIN.EPS MAX4850/MAX4850H/MAX4852/MAX4852H Dual SPDT Analog Switches with Over-Rail Signal Handling E/2 D2/2 (ND - 1) X e AAAA D/2 e CL D D2 k b CL 0.10 M C A B E2/2 L E2 0.10 C C L 0.08 C C L A A2 A1 L L e e PACKAGE OUTLINE 8, 12, 16L THIN QFN, 3x3x0.8mm 21-0136 PKG 8L 3x3 12L 3x3 16L 3x3 REF. MIN. NOM. MAX. MIN. NOM. MAX. MIN. NOM. MAX. A 0.70 0.75 0.80 0.70 0.75 0.80 0.70 0.75 0.80 b 0.25 0.30 0.35 0.20 0.25 0.30 0.20 0.25 0.30 D 2.90 3.00 3.10 2.90 3.00 3.10 2.90 3.00 3.10 E 2.90 3.00 3.10 2.90 3.00 3.10 2.90 3.00 3.10 e L 0.65 BSC. 0.35 0.55 0.75 0.45 0.55 0.65 0.30 0.40 8 12 16 ND 2 3 4 NE 2 3 4 N 0 A1 A2 k 0.02 0.05 0 0.20 REF 0.25 - 0.02 0.05 0 - 0.25 - 0.02 0.50 0.05 0.20 REF 0.20 REF - 0.25 - 1 2 EXPOSED PAD VARIATIONS 0.50 BSC. 0.50 BSC. I PKG. CODES D2 E2 PIN ID MIN. NOM. MAX. MIN. NOM. MAX. TQ833-1 0.25 0.70 1.25 0.25 0.70 1.25 0.35 x 45 T1233-1 1.25 1.25 JEDEC WEEC 0.95 1.10 0.35 x 45 WEED-1 T1233-3 0.95 1.10 1.25 0.95 1.10 1.25 0.35 x 45 WEED-1 T1233-4 0.95 1.10 1.25 0.95 1.10 1.25 0.35 x 45 WEED-1 T1633-2 0.95 1.10 1.25 0.95 1.10 1.25 0.35 x 45 WEED-2 0.95 1.10 T1633F-3 0.65 0.80 0.95 0.65 0.80 0.95 0.225 x 45 WEED-2 T1633FH-3 0.65 0.80 0.95 0.65 0.80 0.95 0.225 x 45 WEED-2 T1633-4 0.95 1.10 1.25 0.95 1.10 1.25 0.35 x 45 WEED-2 T1633-5 0.95 1.10 1.25 0.95 1.10 1.25 0.35 x 45 WEED-2 - NOTES: 1. 2. 3. 4. 5. 6. 7. 8. 9. 10. 11. 12. DIMENSIONING & TOLERANCING CONFORM TO ASME Y14.5M-1994. ALL DIMENSIONS ARE IN MILLIMETERS. ANGLES ARE IN DEGREES. N IS THE TOTAL NUMBER OF TERMINALS. THE TERMINAL #1 IDENTIFIER AND TERMINAL NUMBERING CONVENTION SHALL CONFORM TO JESD 95-1 SPP-012. DETAILS OF TERMINAL #1 IDENTIFIER ARE OPTIONAL, BUT MUST BE LOCATED WITHIN THE ZONE INDICATED. THE TERMINAL #1 IDENTIFIER MAY BE EITHER A MOLD OR MARKED FEATURE. DIMENSION b APPLIES TO METALLIZED TERMINAL AND IS MEASURED BETWEEN 0.20 mm AND 0.25 mm FROM TERMINAL TIP. ND AND NE REFER TO THE NUMBER OF TERMINALS ON EACH D AND E SIDE RESPECTIVELY. DEPOPULATION IS POSSIBLE IN A SYMMETRICAL FASHION. COPLANARITY APPLIES TO THE EXPOSED HEAT SINK SLUG AS WELL AS THE TERMINALS . DRAWING CONFORMS TO JEDEC MO220 REVISION C. MARKING IS FOR PACKAGE ORIENTATION REFERENCE ONLY. NUMBER OF LEADS SHOWN ARE FOR REFERENCE ONLY. WARPAGE NOT TO EXCEED 0.10mm. PACKAGE OUTLINE 8, 12, 16L THIN QFN, 3x3x0.8mm 21-0136 I 2 2 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. 16 ____________________Maxim Integrated Products, 120 San Gabriel Drive, Sunnyvale, CA 94086 408-737-7600 (c) 2004 Maxim Integrated Products is a registered trademark of Maxim Integrated Products.