19-0613; Rev 1; 11/07 High-/Full-Speed USB 2.0 Switches with High ESD The MAX4906EF are electrostatic discharge (ESD)-protected analog switches that combine low on-capacitance (CON) and low on-resistance (RON) necessary for highperformance switching applications. The COM_ inputs are protected against ±15kV ESD without latchup or damage. The device is designed for USB 2.0 high-speed applications at 480Mbps. The switches also handle all the requirements for USB low- and full-speed signaling. The MAX4906EF features two single-pole/double-throw (SPDT) switches. The device is fully specified to operate from a single +2.7V to +3.6V power supply and is protected against a +5.5V short to all analog inputs (COM_, NC_, NO_). This feature makes the MAX4906EF fully compliant with the USB 2.0 specification of +5.5V fault protection. The device features a low threshold voltage and a +1.4V VIH, permitting them to be used with low-voltage logic. The device features a QP input that when driven high, turns the charge pump off and sets the device in standby mode. When the device is in standby mode, the quiescent supply current is reduced to 3µA (max) and the switches remain operable. The MAX4906EF is available in a space-saving, 2mm x 2mm µDFN package and operates over a -40°C to +85°C temperature range. Applications USB Switching Relay Replacements Cell Phones Ethernet Switching PDAs Video Switching Digital Still Cameras Bus Switches GPS T3/E3 Switches for Redundancy Protection Notebook Computers Features ♦ ±15kV (Human Body Model) ESD Protection, on COM_ ♦ Fully Specified for a Single +2.7V to +3.6V Power-Supply Voltage ♦ Low 4Ω (typ), 7Ω (max) On-Resistance (RON) ♦ -3dB Bandwidth: 500MHz (typ) ♦ Low Bit-to-Bit Skew ≤ 20ps ♦ Charge-Pump Noise = 90µV (typ) ♦ Charge-Pump Enable ♦ No Need for Logic-Level Shifters for 1.4V or Above ♦ COM_ Analog Inputs Fault-Protected Against Shorts to USB Supply Rail Up to +5.5V ♦ Low Supply Current 3µA (max) in Standby ♦ Space-Saving 10-Pin, 2mm x 2mm µDFN Package Ordering Information PART PIN-PACKAGE MAX4906EFELB+T 10 µDFN-10 TOP MARK PKG CODE AAJ L1022-1 Note: The device operates over the -40°C to +85°C operating temperature range. +Denotes a lead-free package. Pin Configuration Typical Operating Characteristics EYE DIAGRAM V+ = 3.3V IBIAS = 9mA UI = 2.08ns VNO1OUT USB 2.0 HIGH SPEED TRANSMIT TEMPLATE 100mV/div VNO2OUT TOP VIEW + IN 1 10 V+ QP 2 9 NC1 GND 3 8 NC2 COM1 4 7 NO1 COM2 5 6 NO2 MAX4906EF μDFN 200ps/div ________________________________________________________________ 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 MAX4906EF General Description MAX4906EF High-/Full-Speed USB 2.0 Switches with High ESD ABSOLUTE MAXIMUM RATINGS (All voltages referenced to GND.) V+ .............................................................................-0.3V to +4V IN, QP (Note 1) .........................................................-0.3V to +4V COM_, NO_, NC_ ..................................................-0.3V to +5.5V Continuous Current (COM_ to NO_/NC_) ......................±120mA Peak Current, (COM_ to NO_/NC_) (pulsed at 1ms 10% duty cycle).................................±240mA Continuous Power Dissipation (TA = +70°C) 10-Pin µDFN (derate 5.0mW/°C above +70°C) ...........403mW Operating Temperature Range ..........................-40°C to +85°C Junction Temperature .....................................................+150°C Storage Temperature Range .............................-65°C to +150°C Lead Temperature (soldering, 10s) .................................+300°C Note 1: Signals on IN, QP exceeding GND are clamped by internal diodes. Limit forward-diode current to maximum current rating. 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+ = +2.7V to +3.6V, TA = TMIN to TMAX, charge-pump enabled, unless otherwise noted. Typical values are at V+= 3.3V, TA = +25°C.) (Note 2) PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS 3.6 V 3.9 4.20 V 3.8 5 ANALOG SWITCH Analog Signal Range Fault-Protection Trip Threshold (Note 9) On-Resistance, Charge-Pump Enabled On-Resistance, Charge-Pump Disabled On-Resistance Match Between Channels On-Resistance Flatness 2 VCOM_,VNO_, QP = 0 or V+ (Note 3) VNC_ 0 VFP RON RON ΔRON RFLAT(ON) 3.62 V+ = 2.7V, ICOM_ = -10mA, VCOM_ = 0V, 1.5V, QP = 0V V+ = 2.7V, ICOM_ = -10mA, VCOM_ = 2.7V, QP = 0V V+ = 3.0V, ICOM_ = -10mA, VCOM_ = 0V, 1.5V, QP = V+ V+=2.7V, ICOM_ = -10mA, VCOM_ = 0V, 1.5V, QP = V+ V+ = 2.7V, ICOM_ = -10mA, VCOM_ = 0V, 1.5V, 2.7V (Note 4) TA = +25°C Ω TA = TMIN to TMAX TA = +25°C 6 4 7 Ω TA = TMIN to TMAX TA = +25°C 8 5 TA = TMIN to TMAX 12 13 Ω TA = +25°C 8 TA = TMIN to TMAX TA = +25°C 15 17 0.5 0.8 Ω TA = TMIN to TMAX V+ = 2.7V, ICOM_ = -10mA, VCOM_ = 0V, 1.5V (Note 5) 1.0 0.5 _______________________________________________________________________________________ Ω High-/Full-Speed USB 2.0 Switches with High ESD (V+ = +2.7V to +3.6V, TA = TMIN to TMAX, charge-pump enabled, unless otherwise noted. Typical values are at V+= 3.3V, TA = +25°C.) (Note 2) PARAMETER Off-Leakage Current SYMBOL INC_, INO_ MIN TYP MAX UNITS -1 +1 µA -1 +1 µA (ON) V+ = 3.6V, VCOM = 0.3V, 3.3V; VNO_ or VNC_ = 0.3V, 3.3V, or floating BW RL = RS = 50Ω, signal = 0dBm, Figure 1 500 f = 10MHz; VNO_, VNC_ = 1VP-P; RL = RS = 50Ω, Figure 1 -60 f = 250MHz; VNO_, VNC_ = 1VP-P; RL = RS = 50Ω, Figure 1 -32 f = 10MHz; VNO_, VNC_ = 1VP-P; RL = RS = 50Ω, Figure 1 -59 f = 250MHz; VNO_, VNC_ = 1VP-P; RL = RS = 50Ω, Figure 1 -31 Any input or output switch terminal = 50Ω 90 (OFF) On-Leakage Current CONDITIONS V+ = 3.6V, VCOM_ = 0.3V, 3.3V; VNO_ or VNC_ = 3.3V, 0.3V INC_, INO_ SWITCH AC PERFORMANCE On-Channel -3dB Bandwidth Off-Isolation VISO Crosstalk (Note 6) VCT Charge-Pump Noise (Note 7) VQP MHz dB dB µV SWITCH DYNAMICS NO_, NC_, COM_ Off-Capacitance (Note 8) C(OFF) f = 1MHz, Figure 2 9 10 pF NO_, NC_, COM_ On-Capacitance (Note 8) C(ON) f = 1MHz, Figure 2 10 12 pF Switch On-Capacitance Matching (Note 8) CONM f = 1MHz 0.4 pF Turn-On Time tON VNO_, VNC_ = 1.5V; RL = 300Ω, CL = 35pF, VIH = V+, VIL = 0V, QP = 0V, Figure 3 1.4 ns Turn-Off Time tOFF VNO_, VNC_ = 1.5V; RL = 300Ω, CL = 35pF, VIH = V+, VIL = 0V, QP = 0V, Figure 3 35 ns RL = RS = 50Ω, Figure 4 0.2 ns Propagation Delay tPLH_,tPHL Fault-Protection Response Time tFP VCOM_ = 0 to 5V step, RL = RS = 50Ω, CL = 10pF, Figure 5 1 µs Fault-Protection Recovery Time tFPR VCOM_ = 5V to 3V step, RL = RS = 50Ω, CL = 10pF, Figure 5 1 µs Output Skew Between Switches (Note 8) tSK(o) Skew between switch 1 and switch 2, RL = RS = 50Ω, Figure 4 20 100 ps Output Skew Same Switch (Note 8) tSK(p) Skew between opposite transitions in same switch, RL = RS = 50Ω, Figure 4 5 100 ps _______________________________________________________________________________________ 3 MAX4906EF ELECTRICAL CHARACTERISTICS (continued) ELECTRICAL CHARACTERISTICS (continued) (V+ = +2.7V to +3.6V, TA = TMIN to TMAX, charge-pump enabled, unless otherwise noted. Typical values are at V+= 3.3V, TA = +25°C.) (Note 2) PARAMETER SYMBOL Total Harmonic Distortion Plus Noise CONDITIONS MIN TYP MAX UNITS THD+N VCOM_ = 2VP-P, RL = 600Ω, f = 20Hz to 20kHz 0.01 % Q VGEN = 1.5V, RGEN = 0Ω, CL = 100pF, Figure 6 20 pC Charge Injection SWITCH LOGIC Logic-Input Voltage Low VIL Logic-Input Voltage High VIH 0.4 V 1.4 Input-Logic Hysteresis VHYST Input Leakage Current IIN Operating Supply-Voltage Range V+ Quiescent Supply Current I+ V+ = 3.6V, VIN = 0 or V+, QP = 0V Quiescent Supply Current With Charge-Pump Disabled I+ V+ = 3.6V, VIN = 0 or V+, QP = V+ V 100 V+ = 3.6V, VIN = 0 or V+ mV -1 +1 µA 2.7 3.6 V 1000 µA 3 µA 160 ESD PROTECTION COM_ Human Body Model ±15 kV Note 2: All units are 100% production tested at TA = +25°C. Limits over the operating temperature range are guaranteed by design and not production tested. Note 3: The switch will turn off for voltages above (VFP); therefore, protecting downstream circuits in case of a fault condition. Note 4: ΔRON(MAX) = | RON(CH1) – RON(CH2) | Note 5: Flatness is defined as the difference between the maximum and minimum value of on-resistance, as measured over specified analog signal ranges. Note 6: Between any two switches. Note 7: Noise specification is measured peak to peak. Note 8: Switch off-capacitance, switch on-capacitance, output skew between switches, and output skew same-switch limits are not production tested; design guaranteed by correlation. Note 9: Fault-protection trip threshold, limits are not production tested; guaranteed by design. Typical Operating Characteristics (V+ = 3.3V, TA = +25°C, unless otherwise noted.) 4 3 RON (Ω) 4 V+ = 3.3V 3 TA = -40°C TA = +25°C 2 2 1 1 V+ = 3.6V 9 9 8 8 7 7 6 6 5 0 0 0.9 1.8 VCOM (V) 4 2.7 3.6 5 COM ON-LEAKAGE 4 4 3 3 2 2 1 0 1 COM OFF-LEAKAGE 0 0 1.1 2.2 VCOM (V) 3.3 10 0 -40 -15 10 35 TEMPERATURE (°C) _______________________________________________________________________________________ 60 85 COM OFF-LEAKAGE CURRENT (pA) TA = +85°C 5 MAX4906EF toc03 10 COM ON-LEAKAGE CURRENT (nA) V+ = 2.7V MAX4906EF toc02 5 6 MAX4906EF toc01 V+ = 3.6V LEAKAGE CURRENT vs. TEMPERATURE ON-RESISTANCE vs. VCOM ON-RESISTANCE vs. VCOM 6 RON (Ω) MAX4906EF High-/Full-Speed USB 2.0 Switches with High ESD High-/Full-Speed USB 2.0 Switches with High ESD 10 5 160 140 V+ = 2.7V 120 100 80 60 40 220 MAX4906EF toc06 V+ = 3.6V 180 QUISCENT SUPPLY CURRENT (μA) 15 MAX4906EF toc05 20 QUIESCENT SUPPLY CURRENT (μA) CL = 100pF 200 180 160 20 140 0 0 1.1 2.2 -40 3.3 -15 10 35 60 0 85 1.1 2.2 3.3 LOGIC LEVEL (V) TEMPERATURE (°C) VCOM (V) LOGIC-INPUT LOW THRESHOLD vs. SUPPLY VOLTAGE TURN-ON/-OFF TIME vs. SUPPLY VOLTAGE 0.8 MAX4906EF toc08 5 MAX4906EF toc07 1.0 40 4 38 VIL 0.6 0.4 0.2 3 36 2 34 tON 1 0 2.7 3.0 3.3 32 0 3.6 30 SUPPLY VOLTAGE (V) 3.0 3.3 SUPPLY VOLTAGE (V) TURN-ON/-OFF TIME vs. TEMPERATURE RISE-/FALL-TIME PROPAGATION DELAY vs. SUPPLY VOLTAGE 250 40 38 36 4 34 2 32 tOFF (ns) tOFF 6 3.6 MAX4906EF toc10 8 2.7 OUTPUT RISE-/FALL-TIME DELAY (ps) MAX4906EF toc09 10 tOFF (ns) tOFF tON (μs) LOGIC-INPUT LOW THRESHOLD (V) 0 tON (μs) CHARGE INJECTION (pC) 200 MAX4906EF toc04 25 QUIESCENT SUPPLY CURRENT vs. LOGIC LEVEL QUIESCENT SUPPLY CURRENT vs. TEMPERATURE CHARGE INJECTION vs. VCOM 240 230 tPHL 220 tPLH 210 tON 0 30 -40 -15 10 35 TEMPERATURE (°C) 60 85 200 2.7 3.0 3.3 SUPPLY VOLTAGE (V) 3.6 _______________________________________________________________________________________ 5 MAX4906EF Typical Operating Characteristics (continued) (V+ = 3.3V, TA = +25°C, unless otherwise noted.) Typical Operating Characteristics (continued) (V+ = 3.3V, TA = +25°C, unless otherwise noted.) SAME SWITCH OUTPUT SKEW vs. SUPPLY VOLTAGE 9 8 230 tPLH 220 7 OUTPUT SKEW (ps) OUTPUT SKEW (ps) 240 6 5 4 3 20 10 2 210 tPHL 1 0 -40 -15 10 35 TEMPERATURE (°C) 60 85 0 2.7 3.0 3.3 SUPPLY VOLTAGE (V) 3.6 1 MAX4906EF toc14 -20 RL = 600Ω -30 0.1 -40 THD+N (%) OFF-ISOLATION AND CROSSTALK (dB) 0 3.0 3.3 SUPPLY VOLTAGE (V) TOTAL HARMONIC DISTORTION PLUS NOISE vs. FREQUENCY FREQUENCY RESPONSE -10 2.7 MAX4906EF toc15 200 -50 -60 OFF-ISOLATION -70 0.01 -80 -90 -100 CROSSTALK 0.001 -110 1 6 30 MAX4906EF toc12 10 MAX4906EF toc11 250 OUTPUT SKEW BETWEEN SWITCHES vs. SUPPLY VOLTAGE MAX4906EF toc13 RISE-/FALL-TIME PROPAGATION DELAY vs. TEMPERATURE OUTPUT RISE-/FALL-TIME DELAY (ps) MAX4906EF High-/Full-Speed USB 2.0 Switches with High ESD 10 100 FREQUENCY (MHz) 1000 10 100 1k 10k FREQUENCY (Hz) _______________________________________________________________________________________ 100k 3.6 High-/Full-Speed USB 2.0 Switches with High ESD PIN NAME FUNCTION 1 IN Digital Control Input. IN controls switch 1 and switch 2. 2 QP Charge-Pump Enable Input. Drive QP high to turn charge pump off. For normal operation, drive QP low. 3 GND 4 COM1 Analog Switch 1—Common Terminal 5 COM2 Analog Switch 2—Common Terminal 6 NO2 7 NO1 Analog Switch 1—Normally Open Terminal 8 NC2 Analog Switch 2—Normally Closed Terminal 9 NC1 10 V+ Ground Analog Switch 2—Normally Open Terminal Analog Switch 1—Normally Closed Terminal Positive-Supply Voltage Input. Connect V+ to a +2.7V to +3.6V supply voltage. Bypass V+ to GND with a 0.1µF capacitor. Test Circuits/Timing Diagrams +3.3V 10nF V OFF-ISOLATION = 20log OUT VIN NETWORK ANALYZER 0V OR V+ IN_ NC1 V+ COM1 50Ω VIN V CROSSTALK = 20log OUT VIN 50Ω MAX4906EF NO1* 50Ω VOUT MEAS 50Ω REF 50Ω GND MEASUREMENTS ARE STANDARDIZED AGAINST SHORTS AT IC TERMINALS. OFF-ISOLATION IS MEASURED BETWEEN COM_ AND "OFF" 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. *FOR CROSSTALK THIS PIN IS NO2. NC2 AND COM2 ARE OPEN. Figure 1. Off-Isolation and Crosstalk _______________________________________________________________________________________ 7 MAX4906EF Pin Description High-/Full-Speed USB 2.0 Switches with High ESD MAX4906EF Test Circuits/Timing Diagrams (continued) 10nF V+ V+ COM_ MAX4906EF IN CAPACITANCE METER VIL OR VIH NC_ or NO_ f = 1MHz GND Figure 2. Channel Off-/On-Capacitance MAX4906EF V+ VN_ LOGIC INPUT V+ COM_ NO_ OR NC_ 50% VIL VOUT RL t OFF CL IN VOUT GND LOGIC INPUT SWITCH OUTPUT CL INCLUDES FIXTURE AND STRAY CAPACITANCE. RL VOUT = VN_ RL + RON ( ) t r < 5ns t f < 5ns VIH 0.9 x V0UT 0V t ON IN DEPENDS ON SWITCH CONFIGURATION; INPUT POLARITY DETERMINED BY SENSE OF SWITCH. Figure 3. Switching Time 8 0.1 x VOUT _______________________________________________________________________________________ High-/Full-Speed USB 2.0 Switches with High ESD MAX4906EF RS IN+ NC1 OR NO1 COM1 OUT+ RISE-TIME PROPAGATION DELAY = tPLHX OR tPLHY FALL-TIME PROPAGATION DELAY = tPHLX OR tPHLY tSK(O) = |tPLHX - tPLHY| OR |tPHLX - tPHLY| tSK(P) = |tPLHX - tPHLX| OR |tPLHY - tPHLY| RL RS IN- NC2 OR NO2 COM2 OUTRL IN VIL TO VIH tINFALL tINRISE V+ 90% VIN+ 90% 50% 50% 10% 0V 10% V+ VIN- 50% 50% 0V tOUTRISE tPLHX tOUTFALL tPHLX V+ 90% VOUT+ 90% 50% 50% 10% 0V 10% V+ 50% VOUT- 50% 0V tPHLY tPLHY Figure 4. Output Signal Skew, Rise/Fall Time, Propagation Delay _______________________________________________________________________________________ 9 MAX4906EF Test Circuits/Timing Diagrams (continued) High-/Full-Speed USB 2.0 Switches with High ESD MAX4906EF Test Circuits/Timing Diagrams (continued) 5V 2.5V 3V VCOM_ 0V tPF tFPR VPF VNO_ 3V 2.5V 1.5V VNC_ 0V Figure 5. MAX4906EF Fault-Protection Response/Recovery Time V+ MAX4906EF ΔVOUT V+ RGEN VOUT COM_ NC_ OR NO_ VOUT IN OFF CL V GEN GND OFF ON IN VIL TO VIH IN OFF ON OFF Q = (ΔV OUT )(C L ) LOGIC-INPUT WAVEFORMS INVERTED FOR SWITCHES THAT HAVE THE OPPOSITE LOGIC SENSE. Figure 6. Charge Injection Detailed Description The MAX4906EF are ESD-protected analog switches where the COM_ inputs are further protected up to ±15kV ESD without latchup or damage. The device is targeted for USB 2.0 high-speed (480Mbps) switching applications. The device still meets USB low- and fullspeed requirements and is suitable for 10/100 Ethernet switching. The MAX4906EF features two SPDT switches. The MAX4906EF is fully specified to operate from a single +2.7V to +3.6V supply and is +5.5V fault protected. 10 When operating from a +2.7V to +3.6V supply, the low threshold of the device permits them to be used with logic levels as low as 1.4V. The MAX4906EF is based on a charge-pump-assisted n-channel architecture and thus operate at 170µA (max) quiescent current. The device features a standby mode to reduce the quiescent current to less than 3µA (max). Digital Control Input The MAX4906EF provides a single-digit control logic input, IN. IN controls the position of the switches as shown in the Functional Diagram/Truth Table. Driving IN ______________________________________________________________________________________ High-/Full-Speed USB 2.0 Switches with High ESD V+ QP MAX4906EF device in standby mode. When the device is in standby mode, the quiescent supply current is reduced to 3µA (max) and the switches remain operable. When QP is driven low, the charge pump is enabled and the switches enter an improved high-performance mode. Applications Information IN USB Switching NO1 COM1 NC1 NO2 COM2 NC2 The MAX4906EF analog switch is fully compliant with the USB 2.0 specification. The low on-resistance and low on-capacitance of these switches make the device ideal for high-performance switching applications. The MAX4906EF is ideal for routing USB data lines (see Figure 7) and for applications that require switching between multiple USB hosts (see Figure 8). The MAX4906EF also features +5.5V fault protection to guard systems against shorts to the USB bus voltage that is recommended for all USB applications. Ethernet Switching GND MAX4906EF QP IN NO1 NO2 0 0 OFF ON HIGH PERFORMANCE 0 1 ON OFF HIGH PERFORMANCE 1 0 OFF ON LOW PERFORMANCE 1 1 ON OFF LOW PERFORMANCE NC1 NC2 rail-to-rail minimizes power consumption. With a +2.7V to +3.6V supply voltage range, the device is +1.4V logic compatible. Analog Signal Levels The on-resistance of the MAX4906EF is very low and stable as the analog input signals are swept from ground to V+ (see the Typical Operating Characteristics). These switches are bidirectional, allowing NO_, NC_, and COM_ to be configured as either inputs or outputs. Overvoltage Fault Protection The MAX4906EF features +5.5V fault protection to all analog inputs. Fault protection prevents these switches from being damaged due to shorts to the USB bus voltage rail. The wide bandwidth of the MAX4906EF meets the needs of 10/100 Ethernet switching. The device switch the signals from two interface transformers and connect the signals to a single 10/100 Base-T Ethernet PHY, simplifying docking station design and reducing manufacturing costs. ±15kV ESD Protection As with all Maxim devices, ESD-protection structures are incorporated on all pins to protect against electrostatic discharges encountered during handling and assembly. COM_ are further protected against static electricity. Maxim’s engineers have developed state-of-the-art structures to protect these pins against ESD up to ±15kV without damage. The ESD structures withstand high ESD in normal operation, and when the device is powered down. After an ESD event, the MAX4906EF continues to function without latchup, whereas competing products can latch and must be powered down to restore functionality. ESD protection can be tested in various ways. The ESD protection of COM_ are characterized for ±15kV (Human Body Model) using the MIL-STD-883. Charge-Pump Enable 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. The MAX4906EF features a charge-pump enable mode that improves the performance and the dynamic range of the device. The device features a QP input that when driven high, turns the charge pump off and sets the Human Body Model Figure 9a shows the Human Body Model and Figure 9b shows the current waveform it generates when discharged into a low impedance. This model consists of ______________________________________________________________________________________ 11 MAX4906EF Functional Diagram/Truth Table MAX4906EF High-/Full-Speed USB 2.0 Switches with High ESD ASIC I RC 1MΩ D+ USB TRANSCEIVER MAX4906EF VBUS CHARGE-CURRENTLIMIT RESISTOR DNC1 COM1 D+ COM2 D- NO1 HIGHVOLTAGE DC SOURCE Cs 100pF RD 1500Ω DISCHARGE RESISTANCE DEVICE UNDER TEST STORAGE CAPACITOR NC2 ASIC II NO2 D+ USB TRANSCEIVER Figure 9a. Human Body ESD Test Model DGND USB CONNECTOR Figure 7. USB Data Routing IP 100% 90% Ir PEAK-TO-PEAK RINGING (NOT DRAWN TO SCALE) AMPERES 36.8% 10% 0 MAX4906EF 0 NC1 tRL USB0+ TIME tDL CURRENT WAVEFORM COM1 NO1 USB TRANSCEIVER NC2 USB1+ Figure 9b. Human Body Current Waveform USB0- COM2 NO2 USB1- Figure 8. Switching Between Multiple USB Hosts a 100pF capacitor charged to the ESD voltage of interest, which is then discharged into the test device through a 1.5kΩ resistor. Chip Information PROCESS: BiCMOS Layout High-speed switches require proper layout and design procedures for optimum performance. Keep designcontrolled-impedance PC board traces as short as possible. Ensure that bypass capacitors are as close to the device as possible. Use large ground planes where possible. 12 ______________________________________________________________________________________ High-/Full-Speed USB 2.0 Switches with High ESD XXXX XXXX XXXX b e N SOLDER MASK COVERAGE E PIN 1 0.10x45∞ L PIN 1 INDEX AREA 6, 8, 10L UDFN.EPS A D L1 1 SAMPLE MARKING A A (N/2 -1) x e) 7 CL CL b L A A2 A1 L e EVEN TERMINAL e ODD TERMINAL PACKAGE OUTLINE, 6, 8, 10L uDFN, 2x2x0.80 mm -DRAWING NOT TO SCALE- 21-0164 A 1 2 ______________________________________________________________________________________ 13 MAX4906EF 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.) MAX4906EF High-/Full-Speed USB 2.0 Switches with High ESD 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.) COMMON DIMENSIONS SYMBOL MIN. NOM. A 0.70 0.75 0.80 A1 0.15 0.20 0.25 A2 0.020 0.025 D 1.95 2.00 E 1.95 2.00 L 0.30 0.40 L1 MAX. 0.035 - 2.05 2.05 0.50 0.10 REF. PACKAGE VARIATIONS PKG. CODE N e b (N/2 -1) x e L622-1 6 0.65 BSC 0.30±0.05 1.30 REF. L822-1 8 0.50 BSC 0.25±0.05 1.50 REF. L1022-1 10 0.40 BSC 0.20±0.03 1.60 REF. PACKAGE OUTLINE, 6, 8, 10L uDFN, 2x2x0.80 mm -DRAWING NOT TO SCALE- 14 21-0164 A ______________________________________________________________________________________ 2 2 High-/Full-Speed USB 2.0 Switches with High ESD REVISION NUMBER REVISION DATE 0 8/06 Initial release 1 11/07 Changes to EC Table DESCRIPTION PAGES CHANGED — 2, 4 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. Maxim Integrated Products, 120 San Gabriel Drive, Sunnyvale, CA 94086 408-737-7600 ____________________ 15 © 2007 Maxim Integrated Products is a registered trademark of Maxim Integrated Products, Inc. MAX4906EF Revision History