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 3.5Ω or 3.5Ω/7Ω 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 1µA 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 -40°C to +85°C. Features ♦ USB 2.0 Full Speed (12MB) and USB 1.1 Signal Switching Compliant ♦ Switch Signals Greater than VCC ♦ 0.1ns Differential Skew ♦ 3.5Ω/7Ω On-Resistance ♦ 135MHz -3dB Bandwidth ♦ +2V to +5.5V Supply Range ♦ 1.8V Logic Compatible ♦ Low Supply Current 1µA (MAX4852) 5µA (MAX4850) 10µA (MAX4850H/MAX4852H) ♦ Available in a Space-Saving (3mm x 3mm), 16-Pin TQFN Package Ordering Information PART TOP MARK TEMP RANGE PIN-PACKAGE MAX4850ETE -40°C to +85°C 16 TQFN-EP* ABU USB Switching MAX4850HETE -40°C to +85°C 16 TQFN-EP* ABV Audio-Signal Routing MAX4852ETE -40°C to +85°C 16 TQFN-EP* ABZ MAX4852HETE -40°C to +85°C *EP = Exposed paddle. 16 TQFN-EP* ACA Applications 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 3.5Ω COM1 3.5Ω NO1 IN1 NC2 IN2 COM1 NO1 7Ω NC2 3.5Ω NO2 7Ω IN_ NO_ 0 OFF NC_ ON 1 ON OFF IN1 SWITCHES SHOWN FOR LOGIC 0 INPUT COM2 3.5Ω NO2 IN2 COM2 VCC 3 COUT1 CIN1 VCC 3 COUT2 CIN2 ________________________________________________________________ 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 MAX4850/MAX4850H/MAX4852/MAX4852H General Description MAX4850/MAX4850H/MAX4852/MAX4852H Dual SPDT Analog Switches with Over-Rail Signal Handling ABSOLUTE MAXIMUM RATINGS VCC, IN_, CIN_, COM_, NO_, NC_ to GND (Note 1).........................................-0.3V to +6.0V COUT_........................................................-0.3V to (VCC + 0.3V) COUT_ Continuous Current..............................................±20mA Closed Switch Continuous Current COM_, NO_, NC_ 3.5Ω Switch ................................................................±100mA 7Ω Switch .....................................................................±50mA Peak Current COM_, NO_, NC_ (pulsed at 1ms, 50% duty cycle) 3.5Ω Switch ................................................................±200mA 7Ω Switch ...................................................................±100mA Note 1: Peak Current COM_, NO_, NC_ (pulsed at 1ms, 10% duty cycle) 3.5Ω Switch ................................................................±240mA 7Ω Switch ...................................................................±120mA Continuous Power Dissipation (TA = +70°C) 16-Pin TQFN (derate 20.8mW/°C above +70°C) ...........1667mW 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 Signals on IN, NO, NC, or COM below 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 (VCC = +2.7V to +5.5V, TA = -40°C to +85°C, unless otherwise noted. Typical values are at VCC = +3.0V, TA = +25°C, unless otherwise noted.) (Note 2) PARAMETER SYMBOL Supply Voltage CONDITIONS MIN VCC Supply Current ICC TYP 2.0 VCC = 5.5V, VIN_ = 0V or VCC MAX UNITS 5.5 V MAX4850 5 10 MAX4850H/ MAX4852H 10 20 MAX4852 µA 1 ANALOG SWITCH (3.5Ω Switch) Analog Signal Range On-Resistance (Note 3) VNO_, VNC_, VCOM_ RON 0 VCC = 3V, ICOM_ = 10mA, VNC_ or VNO_ = 0 to 5.5V (MAX485_) or VCC (MAX485_H) TA = +25°C 5.5 3.5 TA = -40°C to +85°C 4.5 5 TA = +25°C 0.1 V Ω 0.2 On-Resistance Match Between Channels (Notes 3, 4) ∆RON VCC = 3V, ICOM = 10mA, VNC_ or VNO_ = 1.5V On-Resistance Flatness (Note 5) RFLAT VCC = 3V, ICOM_ = 10mA, VNC_ or VNO_ = 1V, 2V, 3V NO_/NC_ Off-Leakage Current IOFF VCC = 5.5V, VNC_ or VNO_ = 1V or 4.5V, VCOM_ = 4.5V or 1V COM_ On-Leakage Current ION VCC = 5.5V; VNC_ or VNO_ = 1V, 4.5V, or floating; VCOM_ = 1V, 4.5V, or floating -3dB Bandwidth BW Signal = 0dBm, RL = 50Ω, CL = 5pF (Figure 5) 100 MHz f = 1MHz (Figure 6) 20 pF NO_/NC_ Off-Capacitance 2 COFF TA = -40°C to +85°C 0.25 TA = +25°C 1.2 TA = -40°C to +85°C 1.8 2 TA = +25°C -2 +2 TA = -40°C to +85°C -10 +10 TA = +25°C -2 +2 TA = -40°C to +85°C -12.5 +12.5 _______________________________________________________________________________________ Ω Ω nA nA Dual SPDT Analog Switches with Over-Rail Signal Handling (VCC = +2.7V to +5.5V, TA = -40°C to +85°C, unless otherwise noted. Typical values are at VCC = +3.0V, TA = +25°C, unless otherwise noted.) (Note 2) PARAMETER SYMBOL COM On-Capacitance CON CONDITIONS MIN f = 1MHz (Figure 6) TYP MAX 60 UNITS pF ANALOG SWITCH (7Ω Switch) Analog Signal Range VNO_, VNC_, VCOM_ On-Resistance RON 0 VCC = 3V, ICOM_ = 10mA, VNC_ or VNO_ = 0 to 5.5V (MAX4852) or VCC (MAX4852H) TA = +25°C 5.5 7 TA = -40°C to +85°C 9 10 TA = +25°C 0.2 V Ω 0.4 On-Resistance Match Between Channels (Notes 3, 4) ∆RON VCC = 3V, ICOM = 10mA, VNC_ or VNO_ = 1.5V On-Resistance Flatness (Note 5) RFLAT VCC = 3V, ICOM_ = 10mA, VNC_ or VNO_ = 1V, 2V, 3V NO_/NC_ Off-Leakage Current IOFF VCC = 5.5V, VNC_ or VNO_ = 1V or 4.5V, VCOM_ = 4.5V or 1V COM_ On-Leakage Current ION VCC = 5.5V; VNC_ or VNO_ = 1V, 4.5V, or floating; VCOM_ = 1V, 4.5V, or floating -3dB Bandwidth BW Signal = 0dBm, RL = 50Ω, CL = 5pF (Figure 5) 135 MHz TA = -40°C to +85°C 0.5 TA = +25°C 2.5 TA = -40°C to +85°C Ω 3.75 4.0 TA = +25°C -2 +2 TA = -40°C to +85°C -10 +10 TA = +25°C -2 +2 TA = -40°C to +85°C -12.5 +12.5 Ω nA nA NO_/NC_ Off-Capacitance COFF f = 1MHz (Figure 6) 12 pF COM On-Capacitance CON f = 1MHz (Figure 6) 50 pF Signal Over-Rail to High-Z Switching Time tHIZ MAX4850H/MAX4852H, VNO_ or VNC_ = VCC to (VCC + 0.5V), VCC < 5V (Figure 1) 0.5 1 µs High-Z to Low-Z Switching Time tHIZB MAX4850H/MAX4852H, VNO_ or VNC_ = (VCC + 0.5V) to VCC, VCC < 5V (Figure 1) 0.5 1 µs Skew (Note 3) DYNAMIC CHARACTERISTICS tSKEW RS = 39Ω, CL = 50pF (Figure 2) 0.1 1 ns Propagation Delay (Note 3) tPD RS = 39Ω, CL = 50pF (Figure 2) 0.9 2 ns 40 60 Turn-On Time tON VCC = 3V, VNO_ or VNC_ = 1.5V, RL = 300Ω, CL = 50pF (Figure 1) Turn-Off Time tOFF VCC = 3V, VNO_ or VNC_ = 1.5V, RL = 300Ω, CL = 50pF (Figure 1) TA = +25°C TA = -40°C to +85°C TA = +25°C TA = -40°C to +85°C 100 30 ns 40 60 ns _______________________________________________________________________________________ 3 MAX4850/MAX4850H/MAX4852/MAX4852H ELECTRICAL CHARACTERISTICS (continued) MAX4850/MAX4850H/MAX4852/MAX4852H Dual SPDT Analog Switches with Over-Rail Signal Handling ELECTRICAL CHARACTERISTICS (continued) (VCC = +2.7V to +5.5V, TA = -40°C to +85°C, unless otherwise noted. Typical values are at VCC = +3.0V, TA = +25°C, unless otherwise noted.) (Note 2) PARAMETER SYMBOL CONDITIONS MIN TA = +25°C Break-Before-Make Time Delay (Note 3) tD VCC = 3V, VNO_ or VNC_ = 1.5V, RL = 300Ω, CL = 50pF (Figure 3) Charge Injection Q VCOM_ = 1.5V, RS = 0Ω, CL = 1nF (Figure 4) TA = -40°C to +85°C TYP MAX UNITS 15 ns 2 8 pC -80 dB Off-Isolation (Note 6) VISO f = 100kHz, VCOM_= 1VRMS, RL = 50Ω, CL = 5pF (Figure 5) Crosstalk VCT f = 1MHz, VCOM_ = 1VRMS, RL = 50Ω, CL = 5pF (Figure 5) -95 dB Total Harmonic Distortion THD f = 20Hz to 20kHz, VCOM_ = 1V + 2VP-P, RL = 600Ω 0.04 % DIGITAL I/O (IN_) Input-Logic High Voltage VIH Input-Logic Low Voltage VIL Input Leakage Current IIN VCC = 2V to 3.6V 1.4 VCC = 3.6V to 5.5V 1.8 V VCC = 2V to 3.6V 0.5 VCC = 3.6V to 5.5V 0.8 VIN_ = 0 or 5.5V -0.5 VCC = 2V to 5.5V, falling input 0.3 x VCC V +0.5 µA 5.5 V 0.36 x VCC V COMPARATOR Comparator Range Comparator Threshold Comparator Hysteresis 0 VTH VCC = 2V to 5.5V Comparator Output High Voltage ISOURCE = 1mA Comparator Output Low Voltage ISINK = 1mA Comparator Switching Time Note 2: Note 3: Note 4: Note 5: Note 6: 4 0.33 x VCC 50 mV VCC 0.4V V 0.4 Rising input (Figure 7) 2.5 Falling input (Figure 7) 0.5 V µs Specifications are 100% tested at TA = +85°C only, and guaranteed by design and characterization over the specified temperature range. Guaranteed by design and characterization; not production tested. ∆RON = RON(MAX) - RON(MIN). Flatness is defined as the difference between the maximum and minimum value of on-resistance as measured over the specified analog signal ranges. Off-isolation = 20log10 (VCOM_ / VNO_), VCOM_ = output, VNO_ = input to off switch. _______________________________________________________________________________________ Dual SPDT Analog Switches with Over-Rail Signal Handling VCC = 2.3V 5 VCC = 2.5V 4 VCC = 3.0V 3 VCC = 5.0V 0 TA = +25°C 2.5 2.0 2 6 4 0 VCC = 3.0V 3 4.5 VCC = 5.0V 4.0 TA = +25°C 3.5 3.0 2.5 2.0 2 VCC = 3.0V 3.5Ω SWITCH TA = +85°C 3.5 MAX4850 toc05 MAX4850 toc04 5.0 TA = -40°C 1.0 0 2 0.5 1.0 1.5 2.0 2.5 3.0 1 2 3 5 4 MAX4852 ON-RESISTANCE vs. COM VOLTAGE MAX4852 ON-RESISTANCE vs. COM VOLTAGE VCC = 2.3V ON-RESISTANCE (Ω) VCC = 2.0V 6 5 4 TA = +25°C 3 TA = -40°C 4 4.0 TA = +25°C 3.5 3.0 2.0 2 0 2 TA = +85°C 4.5 2.5 VCC = 2.5V VCC = 3.0V VCC = 5.0V COM VOLTAGE (V) VCC = 5.0V 7Ω SWITCH 5.0 TA = +85°C ON-RESISTANCE (Ω) 25 VCC = 3.0V 7Ω SWITCH 7 5.5 MAX4850 toc08 8 MAX4850 toc07 30 0 0 MAX4852 ON-RESISTANCE vs. COM VOLTAGE VCC = 1.8V 5 TA = -40°C COM VOLTAGE (V) 7Ω SWITCH 10 1.5 COM VOLTAGE (V) 40 15 2.0 COM VOLTAGE (V) 45 20 TA = +25°C 0.5 0 6 4 TA = +85°C 2.5 1.0 1.5 1 VCC = 5.0V 3.5Ω SWITCH 3.0 ON-RESISTANCE (Ω) 4 35 6 4 MAX4850H/MAX4852H ON-RESISTANCE vs. COM VOLTAGE VCC = 2.5V 0 2 MAX4850H/MAX4852H ON-RESISTANCE vs. COM VOLTAGE 3.5Ω SWITCH MAX4850 toc03 0.5 2 MAX4850H/MAX4852H ON-RESISTANCE vs. COM VOLTAGE VCC = 2.3V 5 TA = -40°C COM VOLTAGE (V) ON-RESISTANCE (Ω) 6 1.5 1.0 0 VCC = 2.0V 7 2.0 COM VOLTAGE (V) VCC = 1.8V 8 TA = +25°C COM VOLTAGE (V) 10 9 6 4 TA = +85°C 2.5 TA = -40°C 0.5 0 ON-RESISTANCE (Ω) 3.0 1.0 1 ON-RESISTANCE (Ω) TA = +85°C 3.5 1.5 2 VCC = 5.0V 3.5Ω SWITCH 3.0 MAX4850 toc06 6 3.5 MAX4850 toc09 VCC = 2.0V 7 4.0 ON-RESISTANCE (Ω) ON-RESISTANCE (Ω) 8 VCC = 3.0V 3.5Ω SWITCH ON-RESISTANCE (Ω) 3.5Ω SWITCH VCC = 1.8V 4.5 MAX4850 toc01 10 9 MAX4850/MAX4852 ON-RESISTANCE vs. COM VOLTAGE MAX4850/MAX4852 ON-RESISTANCE vs. COM VOLTAGE MAX4850 toc02 MAX4850/MAX4852 ON-RESISTANCE vs. COM VOLTAGE 6 TA = -40°C 1.5 0 2 4 COM VOLTAGE (V) 6 0 1 2 3 4 5 6 COM VOLTAGE (V) _______________________________________________________________________________________ 5 MAX4850/MAX4850H/MAX4852/MAX4852H Typical Operating Characteristics (VCC = 3.0V, TA = +25°C, unless otherwise noted.) Typical Operating Characteristics (continued) (VCC = 3.0V, TA = +25°C, unless otherwise noted.) MAX4852H ON-RESISTANCE vs. COM VOLTAGE 40 VCC = 1.8V 7 5.5 25 VCC = 2.0V 20 VCC = 2.3V 15 6 5 TA = +25°C 4 VCC = 5.0V 3 2 2 0.5 1.0 1.5 2.0 3.0 2.5 0 1 2 10 MAX4850 toc13 7 TA = -40°C 5 4 TA = +85°C TA = +25°C 9 SUPPLY CURRENT (µA) 6 3 4 5 COM VOLTAGE (V) MAX4850H SUPPLY CURRENT vs. SUPPLY VOLTAGE MAX4850 SUPPLY CURRENT vs. SUPPLY VOLTAGE SUPPLY CURRENT (µA) TA = -40°C COM VOLTAGE (V) COM VOLTAGE (V) 3 3.0 1.5 0 6 4 TA = +25°C 3.5 MAX4850 toc14 0 4.0 2.0 5 0 TA = +85°C 4.5 2.5 TA = -40°C VCC = 2.5V VCC = 3.0V 10 ON-RESISTANCE (Ω) 30 VCC = 5.0V 7Ω SWITCH 5.0 TA = +85°C ON-RESISTANCE (Ω) ON-RESISTANCE (Ω) VCC = 3.0V 7Ω SWITCH MAX4850 toc12 7Ω SWITCH 35 8 MAX4850 toc10 45 MAX4852H ON-RESISTANCE vs. COM VOLTAGE MAX4850 toc11 MAX4852H ON-RESISTANCE vs. COM VOLTAGE TA = -40°C 8 7 6 5 TA = +85°C TA = +25°C 4 3 2 2 3.5 1.5 5.5 4.5 2.5 2.0 TA = +85°C 1.5 1.0 TA = -40°C 6.0 5.5 5.0 4.5 TA = +85°C 4.0 TA = +25°C TA = -40°C MAX4850 toc16 6.5 SUPPLY CURRENT (µA) 2.5 0.5 TA = +25°C 2.5 3.5 SUPPLY VOLTAGE (V) 4.5 5.5 60 3.5Ω SWITCH 50 40 tON 30 20 tOFF 0 3.0 1.5 TURN-ON/TURN-OFF TIME vs. SUPPLY VOLTAGE 10 3.5 0 6 7.0 MAX4850 toc15 3.0 5.5 4.5 MAX4852H SUPPLY CURRENT vs. SUPPLY VOLTAGE MAX4852 SUPPLY CURRENT vs. SUPPLY VOLTAGE 3.5 3.5 SUPPLY VOLTAGE (V) SUPPLY VOLTAGE (V) MAX4850 toc17 2.5 TURN-ON/TURN-OFF TIME (ns) 1.5 SUPPLY CURRENT (nA) MAX4850/MAX4850H/MAX4852/MAX4852H Dual SPDT Analog Switches with Over-Rail Signal Handling 1.5 2.5 3.5 SUPPLY VOLTAGE (V) 4.5 5.5 1.5 2.5 3.5 SUPPLY VOLTAGE (V) _______________________________________________________________________________________ 4.5 5.5 Dual SPDT Analog Switches with Over-Rail Signal Handling TURN-ON/TURN-OFF TIME vs. SUPPLY VOLTAGE tON 28 26 tOFF 24 7Ω SWITCH 40 tON 30 20 tOFF 10 35 2.5 LOGIC THRESHOLD vs. SUPPLY VOLTAGE 3.5 -40 -15 1.2 1.0 VIN FALLING 0.8 30 VCC = 3V 20 VCC = 5V 1 2 SUPPLY VOLTAGE (V) 7Ω SWITCH VCC = 3V 30 VCC = 5V 20 10 3 5 4 0 1 COM VOLTAGE (V) LEAKAGE CURRENT vs. TEMPERATURE 3 4 5 LEAKAGE CURRENT vs. TEMPERATURE 0.8 COM OFF-LEAKAGE 0.4 0.2 MAX4850 toc25 7Ω SWITCH 1.4 LEAKAGE CURRENT (nA) COM ON-LEAKAGE 0.6 2 COM VOLTAGE (V) 1.6 MAX4850 toc24 3.5Ω SWITCH 1.2 1.0 85 0 0 1.4 60 CHARGE INJECTION vs. COM VOLTAGE 0 5.5 4.5 35 40 10 0.6 10 TEMPERATURE (°C) 3.5Ω SWITCH VIN RISING LEAKAGE CURRENT (nA) tOFF 24 CHARGE INJECTION vs. COM VOLTAGE CHARGE INJECTION (pC) 1.4 3.5 26 5.5 4.5 40 MAX4850 toc21 1.6 2.5 28 SUPPLY VOLTAGE (V) TEMPERATURE (°C) 1.5 tON 30 20 1.5 85 60 CHARGE INJECTION (pC) -15 MAX4850 toc22 -40 32 22 0 20 MAX4850 toc20 50 10 22 LOGIC THRESHOLD (V) 34 MAX4850 toc23 30 7Ω SWITCH TURN-ON/TURN-OFF TIME (ns) 32 60 TURN-ON/TURN-OFF TIME (ns) TURN-ON/TURN-OFF TIME (ns) 3.5Ω SWITCH MAX4850 toc18 34 TURN-ON/TURN-OFF TIME vs. TEMPERATURE MAX4850 toc19 TURN-ON/TURN-OFF TIME vs. TEMPERATURE 1.2 COM ON-LEAKAGE 1.0 0.8 COM OFF-LEAKAGE 0.6 0.4 0.2 0 0 -40 -15 10 35 TEMPERATURE (°C) 60 85 -40 -15 10 35 60 85 TEMPERATURE (°C) _______________________________________________________________________________________ 7 MAX4850/MAX4850H/MAX4852/MAX4852H Typical Operating Characteristics (continued) (VCC = 3.0V, TA = +25°C, unless otherwise noted.) Typical Operating Characteristics (continued) (VCC = 3.0V, TA = +25°C, unless otherwise noted.) -20 -40 OFF-RESPONSE -60 CROSSTALK -80 7Ω SWITCH -20 -40 OFF-RESPONSE -60 CROSSTALK -80 -100 1 10 100 1000 0.1 1 10 100 FREQUENCY (MHz) FREQUENCY (MHz) TOTAL HARMONIC DISTORTION vs. FREQUENCY TOTAL HARMONIC DISTORTION vs. FREQUENCY 1 1 THD (%) 3.5Ω SWITCH RL = 600Ω MAX4850 toc28 0.1 0.1 0.01 7Ω SWITCH RL = 600Ω 1000 MAX4850 toc29 -100 0.1 0.01 10 100 1k FREQUENCY (Hz) 8 ON-RESPONSE 0 MAX4850 toc27 3.5Ω SWITCH 0 20 FREQUENCY RESPONSE (dB) FREQUENCY RESPONSE (dB) ON-RESPONSE FREQUENCY RESPONSE MAX4850 toc26 FREQUENCY RESPONSE 20 THD (%) MAX4850/MAX4850H/MAX4852/MAX4852H Dual SPDT Analog Switches with Over-Rail Signal Handling 10k 100k 10 100 1k 10k FREQUENCY (Hz) _______________________________________________________________________________________ 100k Dual SPDT Analog Switches with Over-Rail Signal Handling COMPARATOR THRESHOLD vs. TEMPERATURE COMPARATOR THRESHOLD vs. TEMPERATURE 1.08 VCMPI_ RISING 1.06 1.04 VCMPI_ FALLING 1.02 1.750 MAX4850 toc31 COMPARATOR THRESHOLD (V) VCC = 3.0V VCC = 5.0V COMPARATOR THRESHOLD (V) MAX4850 toc30 1.10 VCMPI_ RISING 1.725 1.700 VCMPI_ FALLING 1.675 1.650 1.625 1.600 1.00 -40 -15 10 35 60 -40 85 -15 10 35 60 TEMPERATURE (°C) TEMPERATURE (°C) MAX4850/MAX4852 SWITCH PASSING SIGNALS ABOVE SUPPLY VOLTAGE MAX4850H/MAX4852H SWITCH ENTERING HIGH-IMPEDANCE STATE MAX4850 toc32 MAX4850 toc33 VCC = 3.0V VCC = 3.0V VNC 2V/div VNC 2V/div 0V 0V VCOM VCOM 0V 0V 200µs/div 85 HI-Z STATE HI-Z STATE 200µs/div _______________________________________________________________________________________ 9 MAX4850/MAX4850H/MAX4852/MAX4852H Typical Operating Characteristics (continued) (VCC = 3.0V, TA = +25°C, unless otherwise noted.) MAX4850/MAX4850H/MAX4852/MAX4852H Dual SPDT Analog Switches with Over-Rail Signal Handling Pin Descriptions MAX4850/MAX4850H PIN NAME 1, 8 N.C. No Connection. Not internally connected. FUNCTION 2 CIN1 Inverting Input for Comparator 1 3 CIN2 Inverting Input for Comparator 2 4 COM1 5 NO1 Normally Open Terminal for Analog Switch 1 6 GND Ground 7 NC2 Normally Closed Terminal for Analog Switch 2 9 IN2 Digital Control Input for Analog Switch 2. A logic LOW on IN2 connects COM2 to NC2 and a logic HIGH connects COM2 to NO2. Common Terminal for Analog Switch 1 10 COM2 Common Terminal for Analog Switch 2 11 COUT1 Output for Comparator 1 12 NO2 13 COUT2 Normally Open Terminal for Analog Switch 2 14 VCC Supply Voltage. Bypass to GND with a 0.01µF capacitor as close to the pin as possible. 15 IN1 Digital Control Input for Analog Switch 1. A logic LOW on IN1 connects COM1 to NC1 and a logic HIGH connects COM1 to NO1. 16 NC1 EP — Output for Comparator 2 Normally Closed Terminal for Analog Switch 1 Exposed Paddle. Connect to PC board ground plane. MAX4852/MAX4852H PIN NAME FUNCTION 1, 2, 3, 8, 11, 13 N.C. 4 COM1 5 NO1 Normally Open Terminal for Analog Switch 1 6 GND Ground 7 NC2 Normally Closed Terminal for Analog Switch 2 9 IN2 Digital Control Input for Analog Switch 2. A logic LOW on IN2 connects COM2 to NC2 and a logic HIGH connects COM2 to NO2. 10 COM2 12 NO2 Normally Open Terminal for Analog Switch 2 14 VCC Supply Voltage. Bypass to GND with a 0.01µF capacitor as close to the pin as possible. 15 IN1 Digital Control Input for Analog Switch 1. A logic LOW on IN1 connects COM1 to NC1 and a logic HIGH connects COM1 to NO1. 16 NC1 EP — 10 No Connection. Not internally connected. Common Terminal for Analog Switch 1 Common Terminal for Analog Switch 2 Normally Closed Terminal for Analog Switch 1 Exposed Paddle. Connect to PC board ground plane. ______________________________________________________________________________________ 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_ features 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 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 INPUT A 10% tskew_i CL Rs INPUT A- 90% 50% 10% tfi tro A- TxDRs Rs = 39Ω 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 ______________________________________________________________________________________ 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 50Ω COM1 IN_ MAX4850_ MAX4852_ 50Ω VIN V ON-LOSS = 20log OUT VIN 50Ω CROSSTALK = 20log NO1* GND VOUT MEAS 50Ω 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 50Ω *FOR CROSSTALK THIS PIN IS NO2. NC2 AND COM2 ARE OPEN. Figure 5. On-Loss, Off-Isolation, and Crosstalk ______________________________________________________________________________________ 13 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 CIN_ GND VTH = VCC/3 50% 50% VTH - 100mV COUT_ VCIN_ COMPARATOR INPUT (VCIN_) VCC VOUT VCOUT_ COMPARATOR OUTPUT (VCOUT_) tCOMP tCOMP 50% 50% 0V Figure 7. Comparator Switching Time 14 ______________________________________________________________________________________ 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 (Ω) 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 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.) 12x16L QFN THIN.EPS MAX4850/MAX4850H/MAX4852/MAX4852H Dual SPDT Analog Switches with Over-Rail Signal Handling D2 0.10 M C A B b D D2/2 D/2 E/2 E2/2 CL (NE - 1) X e E E2 L k e CL (ND - 1) X e CL CL 0.10 C 0.08 C A A2 A1 L L e e PACKAGE OUTLINE 12, 16L, THIN QFN, 3x3x0.8mm E 21-0136 1 2 EXPOSED PAD VARIATIONS DOWN BONDS ALLOWED NOTES: 1. DIMENSIONING & TOLERANCING CONFORM TO ASME Y14.5M-1994. 2. ALL DIMENSIONS ARE IN MILLIMETERS. ANGLES ARE IN DEGREES. 3. N IS THE TOTAL NUMBER OF TERMINALS. 4. 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. 5. DIMENSION b APPLIES TO METALLIZED TERMINAL AND IS MEASURED BETWEEN 0.20 mm AND 0.25 mm FROM TERMINAL TIP. 6. ND AND NE REFER TO THE NUMBER OF TERMINALS ON EACH D AND E SIDE RESPECTIVELY. 7. DEPOPULATION IS POSSIBLE IN A SYMMETRICAL FASHION. 8. COPLANARITY APPLIES TO THE EXPOSED HEAT SINK SLUG AS WELL AS THE TERMINALS. 9. DRAWING CONFORMS TO JEDEC MO220 REVISION C. PACKAGE OUTLINE 12, 16L, THIN QFN, 3x3x0.8mm 21-0136 E 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 © 2004 Maxim Integrated Products Printed USA is a registered trademark of Maxim Integrated Products.