19-1782; Rev 1; 3/02 3.5Ω, Single 8:1 and Dual 4:1, Low-Voltage Analog Multiplexers Features The MAX4638/MAX4639 are single 8:1 and dual 4:1 CMOS analog multiplexers/demultiplexers (muxes/ demuxes). Each mux operates from a single +1.8V to +5V supply or dual ±2.5V supplies. These devices feature 3.5Ω on-resistance (RON) when powered with a single +5V supply and have -75dB of off-isolation and -85dB crosstalk from the output to each off channel. The switching times are 18ns tON and 7ns tOFF. They feature a -3dB 85MHz bandwidth and a guaranteed 0.25nA leakage current at +25°C. ♦ Guaranteed RON 3.5Ω (+5V or ±2.5V Supplies) 6Ω (+3V Supply) ♦ Guaranteed 0.4Ω RON Match Between Channels A +1.8V to +5.5V operating range makes the MAX4638/ MAX4639 ideal for battery-powered, portable instruments. All channels guarantee break-before-make switching. These parts feature bidirectional operation and can handle Rail-to-Rail® analog signals. All control inputs are TTL/CMOS-logic compatible. Decoding is in standard BCD format, and an enable input is provided to simplify cascading of devices. These devices are available in small 16-pin QFN, TSSOP and SOIC packages, as well as a 20-pin QFN package. ♦ +1.8V to +5.5V Single-Supply Operation ±2.5V Dual-Supply Operation ♦ Rail-to-Rail Signal Handling ♦ Guaranteed 1Ω RON Flatness Over Signal Range ♦ Guaranteed Low Leakage Currents 0.25nA at +25°C ♦ Switching Times: tON = 18ns, tOFF = 7ns ♦ TTL/CMOS-Logic Compatible ♦ Crosstalk: -80dB (1MHz) ♦ Off-Isolation: -60dB (10MHz) Applications Ordering Information Automatic Test Equipment TEMP RANGE PIN-PACKAGE Low-Voltage Data-Acquisition Systems MAX4638EGE PART -40°C to +85°C 16 QFN (4 ✕ 4) Audio and Video Signal Routing MAX4638EUE -40°C to +85°C 16 TSSOP Medical Equipment MAX4638ESE -40°C to +85°C 16 SO Battery-Powered Equipment MAX4638EGP -40°C to +85°C 20 QFN (4 ✕ 4) Ordering Information continued at end of data sheet. Relay Replacement Pin Configurations/Functional Diagrams TOP VIEW MAX4638 A0 1 EN 2 V- 3 LOGIC MAX4639 16 A1 A0 1 15 A2 EN 2 14 GND V- 3 16 A1 15 GND LOGIC 14 V+ NO1 4 13 V+ NO1A 4 13 NO1B NO2 5 12 NO5 NO2A 5 12 NO2B NO3 6 11 NO6 NO3A 6 11 NO3B NO4 7 10 NO7 NO4A 7 10 NO4B NO8 COMA 8 9 COM 8 9 TSSOP/SO COMB TSSOP/SO Rail-to-Rail is a Registered Trademark of Nippon Motorola, Ltd. ________________________________________________________________ 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 MAX4638/MAX4639 General Description MAX4638/MAX4639 3.5Ω, Single 8:1 and Dual 4:1, Low-Voltage Analog Multiplexers ABSOLUTE MAXIMUM RATINGS (Voltages Referenced to GND) V+ to V- .................................................................................+6V V+, A_, EN ...............................................................-0.3V to +6V V- ............................................................................+0.3V to -6V NO_, COM_ (Note1) .................................... -0.3V to (V+ + 0.3V) Continuous Current A_, EN ............................................. ±30mA Continuous Current NO_, COM_ .................................. ±100mA Peak Current (NO_, COM_) (pulsed at 1ms, 10% duty cycle) .............................. ±200mA Continuous Power Dissipation (TA = +70°C) 16-Pin QFN (derate 18.5mW/°C above +70°C) ........ 1481mW 16-Pin TSSOP (derate 5.7mW/°C above +70°C) ........ 457mW 16-Pin SO (derate 8.70mW/°C above +70°C) ............ 696mW 20-Pin QFN (derate 20mW/°C above +70°C) .......... 1600mW Operating Temperature Range MAX463_E_ E ............................................... -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 COM_, NO_ exceeding V+ or V- are clamped by internal diodes. A_ and EN are clamped only to V- and can exceed V+ up to their maximum ratings. 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—+5V Single Supply (V+ = +5V ±10%, V- = 0, VIH = +2.4V, VIL = +0.8V, TA = TMIN to TMAX, unless otherwise noted. Typical values are at TA = +25°C.) PARAMETER SYMBOL CONDITIONS MIN TYP (Note 2) MAX UNITS V+ V ANALOG SWITCH Analog Signal Range On-Resistance On-Resistance Match Between Channels (Notes 3, 8) VCOM_, VNO_ RON ∆RON On-Resistance Flatness (Note 4) RFLAT(ON) NO_ Off-Leakage Current (Note 5) INO_(OFF) 0 V+ = +4.5V, ICOM_ = 10mA, TA = +25°C VNO_ = +3.5V TA = TMIN to TMAX V+ = +4.5V, ICOM_ = 10mA, TA = +25°C VNO_ = +3.5V TA = TMIN to TMAX 2.5 V+ = +4.5V; ICOM_ = 10mA; TA = +25°C VNO_ = +1V, +2V, +3.5V TA = TMIN to TMAX V+ = +5.5V; VCOM _ = +1V, TA = +25°C +4.5V; VNO_ = +4.5V, +1V TA = TMIN to TMAX 0.75 3.5 4.5 0.1 0.4 0.5 1 1.2 -0.25 ±0.01 -0.35 COM_ Off-Leakage Current (Note 5) ICOM_(OFF) V+ = +5.5V; VCOM_ = +1V, +4.5V; VNO_ = +4.5V, +1V TA = +25°C -0.25 TA = TMIN to TMAX -0.75 COM_ On-Leakage Current (Note 5) V+ = +5.5V; VCOM_ = +1V, ICOM_(ON) +4.5V; VNO_ = +1V, +4.5V, or floating TA = +25°C -0.25 TA = TMIN to TMAX -0.75 0.25 0.35 ±0.01 0.25 0.75 ±0.01 Ω Ω Ω nA nA 0.25 nA 0.75 DIGITAL I/O Input Logic High VIH Input Logic Low VIL Input Leakage Current Digital Input Capacitance IIH, IIL 2.4 VIN_ = 0 or V+ -0.1 CIN V 0.005 0.8 V 0.1 µA 2 pF DYNAMIC Transition Time (Note 5) 2 tTRANS RL = 100Ω, CL = 35pF, VNO1 = +3V or 0, VNO8 = 0 or +3V, Figure 2 TA = +25°C 14 18 ns TA = TMIN to TMAX _______________________________________________________________________________________ 20 3.5Ω, Single 8:1 and Dual 4:1, Low-Voltage Analog Multiplexers (V+ = +5V ±10%, V- = 0, VIH = +2.4V, VIL = +0.8V, TA = TMIN to TMAX, unless otherwise noted. Typical values are at TA = +25°C.) PARAMETER Break-Before-Make (Note 5) Enable Turn-On Time (Note 5) Enable Turn-Off Time (Note 5) On-Channel -3dB Bandwidth Charge Injection SYMBOL CONDITIONS tBBM RL = 100Ω, CL = 35pF, VNO_ = +3V, Figure 3 TA = +25°C RL = 100Ω, CL = 35pF, VNO1 = +3V, VNO2 to VNO8 = 0, Figure 4 TA = +25°C tON(EN) RL = 100Ω, CL = 35pF, VNO1 = +3V, VNO2 to VNO8 = 0, Figure 4 TA = +25°C tOFF(EN) BW Q Signal = 0dBm, CL = 5pF, 50Ω in and out, Figure 6 VCT Total Harmonic Distortion THD 14 18 ns TA = TMIN to TMAX 20 5 7 ns TA = TMIN to TMAX TA = +25°C 8 50 MHz MAX4639 13 pC VNO_ = 0V, f = 1MHz, Figure 8 TA = +25°C 9 pF MAX4638 TA = +25°C 40 MAX4639 TA = +25°C 20 MAX4638 TA = +25°C 54 MAX4639 TA = +25°C 34 TA = +25°C -55 VCOM_ = VNO_ = 0V, f = 1MHz, Figure 8 pF pF CL = 5pF, RL = 50Ω, f = 1MHz, VNO_ = 1VRMS , Figure 6 Crosstalk (Note 7) ns 1 TA = +25°C VCOM_ = 0V, CCOM_(OFF) f = 1MHz, Figure 8 VISO 8 UNITS VGEN = +2.5V, RGEN = 0, CL = 1.0nF, Figure 5 COM_ Off-Capacitance Off-Isolation (Note 6) MAX 85 CNO_(OFF) C(ON) TYP (Note 2) TA = +25°C NO_ Off-Capacitance Switch On-Capacitance MAX4638 TA = TMIN to TMAX MIN dB CL = 5pF, RL = 50Ω, f = 10MHz, VNO_ = 1VRMS , Figure 6 TA = +25°C -75 CL = 5pF, RL = 50Ω, f = 10MHz, VNO_= 1VRMS , Figure 7 TA = +25°C -65 CL = 5pF, RL = 50Ω, f = 1MHz, VNO_ = 1VRMS, Figure 7 TA = +25°C -85 RL = 600Ω, RFLAT(ON)/RL TA = +25°C 0.5 dB % SUPPLY Positive Supply Current I+ V+ = +5.5V, VIN = 0 or V+ 0.001 1.0 µA _______________________________________________________________________________________ 3 MAX4638/MAX4639 ELECTRICAL CHARACTERISTICS—+5V Single Supply (continued) MAX4638/MAX4639 3.5Ω, Single 8:1 and Dual 4:1, Low-Voltage Analog Multiplexers ELECTRICAL CHARACTERISTICS—+3.0V Single Supply (V+ = +2.7V to +3.3V, V- = 0, VIH = +2.0V, VIL = +0.4V, TA = TMIN to TMAX, unless otherwise noted. Typical values are at V+ = +3V and TA = +25°C.) PARAMETER SYMBOL CONDITIONS MIN TYP (Note 2 ) MAX UNITS V+ V ANALOG SWITCH Analog Signal Range On-Resistance On-Resistance Match Between Channels (Notes 3, 8) On-Resistance Flatness (Note 4) VCOM_, VNO_ 0 RON ICOM_ = 10mA, VNO_ = +1.7V TA = +25°C ∆RON ICOM_ = 10mA, VNO_ = +1.7V TA = +25°C ICOM_ = 10mA; VNO_ = +1.5V, +1.7V, +1.9V TA = +25°C RFLAT(ON) 4.5 TA = TMIN to TMAX 8 0.25 TA = TMIN to TMAX 1 TA = TMIN to TMAX 2 2.5 TA = +25°C -0.25 TA = TMIN to TMAX -0.35 COM_ Off-Leakage Current (Note 5) V+ = +3.3V; ICOM_(OFF) VCOM_ = +1V, +3V; VNO_ = +3V, +1V TA = +25°C -0.25 TA = TMIN to TMAX -0.35 COM_ On-Leakage Current (Note 5) V+ = +3.3V; VCOM_ ICOM_(ON) = +1V, +3V; VNO_ = +1V, +3V, or floating TA = +25°C -0.25 TA = TMIN to TMAX -0.35 INO_(OFF) 0.6 0.8 V+ = +3.3V; VCOM_ = +1V, +3V; VNO_ = +3V, +1V NO_ Off-Leakage Current (Note 5) 6 ±0.01 Ω Ω Ω 0.25 nA 0.35 ±0.01 0.25 nA 0.35 ±0.01 0.25 nA 0.35 DIGITAL I/O Input Logic High Input Logic Low Input Leakage Current Digital Input Capacitance VIH 2.0 V VIL IIH, IIL VIN_ = 0 or V+ -0.1 CIN 0.005 0.4 V 0.1 µA 2 pF DYNAMIC tTRANS VNO_ = +2V, CL = 35pF, RL = 100Ω, Figure 2 TA = +25°C tBBM VNO_ = +2V, CL = 35pF, RL = 100Ω, Figure 3 TA = +25°C Enable Turn-On Time (Note 5) tON(EN) VNO_ = +2V, CL = 35pF, RL = 100Ω, Figure 4 TA = +25°C Enable Turn-Off Time (Note 5) tOFF(EN) VNO_ = +2V, CL = 35pF, RL = 100Ω, Figure 4 TA = +25°C Transition Time (Note 5) Break-Before-Make (Note 5) 4 16 TA = TMIN to TMAX TA = TMIN to TMAX 20 24 8 ns 1 15 TA = TMIN to TMAX 20 24 5 TA = TMIN to TMAX _______________________________________________________________________________________ ns 9 10 ns ns 3.5Ω, Single 8:1 and Dual 4:1, Low-Voltage Analog Multiplexers (V+ = +2.7V to +3.3V, V- = 0, VIH = +2.0V, VIL = +0.4V, TA = TMIN to TMAX, unless otherwise noted. Typical values are at V+ = +3V and TA = +25°C.) PARAMETER Off-Isolation (Note 6) Crosstalk (Note 7) SYMBOL VISO VCT On-Channel -3dB Bandwidth BW CONDITIONS TA = +25°C CL = 5pF, RL = 50Ω, f = 1MHz, VNO_ = 1VRMS, Figure 6 TA = +25°C -75 CL = 5pF, RL = 50Ω, f = 10MHz, VNO_ = 1VRMS, Figure 7 TA = +25°C -65 dB -85 TA = +25°C 50 TA = +25°C 85 TA = +25°C 9 MAX4638 TA = +25°C 40 MAX4639 TA = +25°C 20 VCOM = VNO_ MAX4638 = 0V, f = 1MHz, MAX4639 Figure 8 TA = +25°C 54 TA = +25°C 34 Signal = MAX4638 0dBm, 50Ω in and out, MAX4639 Figure 6 VNO_ = 0V, f = 1MHz, Figure 8 VCOM_ = 0V, CCOM_(OFF) f = 1MHz, Figure 8 I+ UNITS 55 TA = +25°C COM_ Off-Capacitance SUPPLY Positive Supply Current MAX dB CL = 5pF, RL = 50Ω, f = 1MHz, VNO_ = 1VRMS, Figure 7 CNO_(OFF) C(ON) TYP (Note 2 ) CL = 5pF, RL = 50Ω, f = 10MHz, VNO_ = +1VRMS , Figure 6 NO_ Off-Capacitance Switch On-Capacitance MIN MHz pF pF pF V+ = +3.3V, VIN_ = 0 or V+ 0.001 1 µA ELECTRICAL CHARACTERISTICS—±2.5V Dual Supplies (V+ = +2.5 ±10%, V- = -2.5V ±10%, VIH = +2.0V, VIL = +0.4V, TA =TMIN to TMAX, unless otherwise noted. Typical values are at V± = ±2.5V and TA = +25°C.) PARAMETER SYMBOL CONDITIONS MIN TYP (Note 2 ) MAX UNITS V+ V ANALOG SWITCH Analog Signal Range On-Resistance VCOM_, VNO_ RON On-Resistance Match Between Channels (Notes 3, 8) ∆RON VICOM_ = 10mA, VNO_ = ±1.5V, TA = +25°C V+ = +2.25V, V- = -2.25V TA = TMIN to TMAX ICOM_ = 10mA, VNO_ = ±1.5V, TA = +25°C V+ = +2.25V, V- = -2.25V TA = TMIN to TMAX 2.5 3.5 4.5 0.2 0.4 0.5 Ω Ω _______________________________________________________________________________________ 5 MAX4638/MAX4639 ELECTRICAL CHARACTERISTICS—+3.0V Single Supply (continued) MAX4638/MAX4639 3.5Ω, Single 8:1 and Dual 4:1, Low-Voltage Analog Multiplexers ELECTRICAL CHARACTERISTICS—±2.5V Dual Supplies (continued) (V+ = +2.5 ±10%, V- = -2.5V ±10%, VIH = +2.0V, VIL = +0.4V, TA = TMIN to TMAX, unless otherwise noted. Typical values are at V± = ±2.5V and TA = +25°C.) PARAMETER SYMBOL CONDITIONS On-Resistance Flatness (Note 4) I = 10mA; VNO_ = ±1.5V, TA = +25°C RFLAT(ON) COM_ 0; V+ = +2.25V; V- = -2.25V TA = TMIN to TMAX NO_ Off-Leakage Current (Note 5) V+ = +2.75V; V- = -2.75V; INO_ (OFF) VCOM_ = +1V, +2.5V; VNO_ = +2.5V, +1V MIN TYP (Note 2 ) MAX 0.75 1 1.2 TA = +25°C -0.25 TA = TMIN to TMAX -0.35 COM_ Off-Leakage Current (Note 5) V+ = +2.75V; V- = -2.75; ICOM_ (OFF) VCOM_ = +1V, +2.5V; VNO_ = +2.5V, +1V TA = +25°C -0.25 TA = TMIN to TMAX -0.35 COM_ On-Leakage Current (Note 5) V+ = +2.5V; V- = -2.5; VCOM_ = +1V, +2.5V; ICOM_ (ON) VNO_ = +1V, +2.5V, or floating TA = +25°C -0.25 TA = TMIN to TMAX -0.35 ±0.01 UNITS Ω 0.25 nA 0.35 ±0.01 0.25 nA 0.35 ±0.01 0.25 nA 0.35 DIGITAL I/O Input Logic High VIH Input Logic Low VIL Input Leakage Current Digital Input Capacitance IIH, IIL 2.0 VIN_ = 0 or V+ -0.1 CIN V 0.005 0.4 V 0.1 µA 2 pF DYNAMIC Transition Time (Note 5) tTRANS Enable Turn-On Time (Note 5) tON(EN) Enable Turn-Off Time (Note 5) tOFF(EN) Break-Before-Make (Note 5) tBBM VNO_ = +1.2V, CL = 35pF, RL = 100Ω, Figure 2 TA = +25°C VNO_ = +1.2V, CL = 35pF, RL = 100Ω, Figure 4 TA = +25°C VNO_ = +1.2V, CL = 35pF, RL = 100Ω, Figure 4 TA = +25°C VNO_ = +1.2V, CL = 35pF, RL = 100Ω, Figure 3 TA = +25°C 16 20 ns TA = TMIN to TMAX 24 14 18 ns TA = TMIN to TMAX 20 5 7 ns TA = TMIN to TMAX 8 8 ns TA = TMIN to TMAX 1 Note 2: The algebraic convention, where the most negative value is a minimum and the most positive value a maximum, is used in this data sheet. Note 3: ∆RON = RON(MAX) - RON(MIN). Note 4: Flatness is defined as the difference between the maximum and minimum value of on-resistance as measured over the specified analog signal ranges. Note 5: Guaranteed by design. Note 6: Off-Isolation = 20log10 (VCOM_ / VNO_), VCOM_ = output, VNO_ = input to off switch. Note 7: Between any two switches. Note 8: ∆RON matching specifications for QFN packaged parts are guaranteed by design. 6 ______________________________________________________________________________________ 3.5Ω, Single 8:1 and Dual 4:1, Low-Voltage Analog Multiplexers 20 V+ = +5V 3.5 6 TA = +85°C V+ = +3V 5 TA = +85°C 10 4 2.5 2.0 TA = -40°C RON (Ω) R0N (Ω) TA = +25°C 1.5 V+ = +3V 1 0.5 V+ = +5V 0 0 0 VCOM (V) SUPPLY CURRENT vs. SUPPLY VOLTAGE CHARGE (pC) 120 V+ = +5V 12 10 8 6 100 3.0 1 0.1 0.01 2 60 0 0.001 -2.5 1.0 1.5 2.0 2.5 3.0 3.5 4.0 4.5 5.0 5.5 6.0 -0.5 1.5 5.5 3.5 -40 -15 10 35 60 SUPPLY VOLTAGE (V) VCOM (V) TEMPERATURE (°C) LOGIC LEVEL THRESHOLD vs. SUPPLY VOLTAGE AND TEMPERATURE ENABLE TURN-ON/TURN-OFF TIME vs. SUPPLY VOLTAGE ENABLE TURN-ON/TURN-OFF TIME vs. TEMPERATURE 1.6 40 35 TA = -40°C tON 25 20 TA = +85°C 10 0 2.8 3.3 3.8 4.3 SUPPLY VOLTAGE (V) 4.8 5.3 tOFF 8 2 5 2.3 10 4 tOFF 0.8 0.6 tON 6 15 1.0 85 12 TIME (ns) TA = +25°C 1.2 1.8 14 30 TIME (ns) 1.4 16 MAX4638 toc08 45 MAX4638 toc07 1.8 LOGIC VOLTAGE (V) 2.5 10 4 80 2.0 SUPPLY CURRENT vs. TEMPERATURE 14 140 1.5 CHARGE INJECTION vs. VCOM 16 160 1.0 VCOM (V) V± = ±2.5V 18 0.5 VCOM (V) SUPPLY CURRENT (nA) 180 SUPPLY CURRENT (pA) 20 MAX4638 toc04 200 0 0.5 1.0 1.5 2.0 2.5 3.0 3.5 4.0 4.5 5.0 MAX4638 toc06 0.5 1.0 1.5 2.0 2.5 3.0 3.5 4.0 4.5 5.0 MAX4638 toc05 0 TA = +25°C TA = -40°C 2 1.0 5 0 3 MAX4638 toc09 RON (Ω) 3.0 15 MAX4638 toc03 V+ = +1.8V MAX4638 toc02 4.0 MAX4638 toc01 25 ON-RESISTANCE vs. VCOM AND TEMPERATURE ON-RESISTANCE vs. VCOM AND TEMPERATURE ON-RESISTANCE vs. VCOM 0 1.5 2.0 2.5 3.0 3.5 4.0 4.5 SUPPLY VOLTAGE (V) 5.0 5.5 -40 -15 10 35 60 85 TEMPERATURE (°C) _______________________________________________________________________________________ 7 MAX4638/MAX4639 Typical Operating Characteristics (V+ = +5V, V- = 0, TA = +25°C, unless otherwise noted.) Typical Operating Characteristics (continued) (V+ = +5V, V- = 0, TA = +25°C, unless otherwise noted.) OFF-ISOLATION -60 CROSSTALK -80 10 ON-LEAKAGE 1 OFF-LEAKAGE -120 0.06 0.04 0.1 0.02 0.01 -100 0 0.001 0.01 0.1 1 10 100 V+ = +2.5V V- = -2.5V 5Vp-p SIGNAL 600Ω IN AND OUT 0.08 THD (%) LEAKAGE CURRENT (pA) -40 MAX4638 toc12 100 ON-RESPONSE MAX4639 0.10 MAX4638 toc11 ON-RESPONSE MAX4638 -20 1000 MAX4638 toc10 0 TOTAL HARMONIC DISTORTION vs. FREQUENCY ON/OFF-LEAKAGE CURRENT vs. TEMPERATURE FREQUENCY RESPONSE RESPONSE (dB) MAX4638/MAX4639 3.5Ω, Single 8:1 and Dual 4:1, Low-Voltage Analog Multiplexers 1000 -40 -20 FREQUENCY (MHz) 0 20 40 60 0.01 80 0.1 1 10 100 FREQUENCY (kHz) TEMPERATURE (°C) Pin Description PIN MAX4638 MAX4639 NAME QFN DIP/SO DIP/SO 8 FUNCTION QFN 16-PIN 20-PIN 16-PIN 20-PIN 1, 15, 16 15, 14, 13 19, 18, 17 — — — A0, A2, A1 Address Inputs — — — 1, 16 15, 14 19, 17 A0, A1 Address Inputs 2 16 1 2 16 1 EN Enable 3 1 2 3 1 2 V- Negative-Supply Voltage Input 4–7 2–5 3–6 — — — NO1–N04 Bidirectional Analog Inputs — — — 4–7 2–5 3–6 NO1A–NO4A Bidirectional Analog Inputs 8 6 7 — — — COM Bidirectional Analog outputs — — — 8, 9 6, 7 7, 9 COMA, COMB Bidirectional Analog outputs 9–12 7–10 10–13 — — — NO8–NO5 Bidirectional Analog Inputs — — — 10–13 8–11 10–13 NO4B–NO1B Bidirectional Analog Inputs 13 11 14 14 12 14 V+ 14 12 15 15 13 15 GND Ground — — 8, 9, 16, 20 — — 8, 16, 18, 20 N.C. No Connection Positive-Supply Voltage Input _______________________________________________________________________________________ 3.5Ω, Single 8:1 and Dual 4:1, Low-Voltage Analog Multiplexers The MAX4638/MAX4639 are low-voltage, CMOS analog muxes. The MAX4638 is an 8:1 mux that switches one of eight inputs (NO1–NO8) to a common output (COM) as determined by the 3-bit binary inputs A0, A1, and A2. The MAX4639 is a 4:1 dual mux that switches one of four differential inputs to a common differential output as determined by the 2-bit binary inputs A0 and A1. Both the MAX4638/MAX4639 have an EN input that can be used to enable or disable the device. When disabled, all channels are switched off. See Truth Tables. +2.5V MAX4638 MAX4639 D1 V+ * * NO_ COM_ * * V- Applications Information D2 Overvoltage Protection Proper power-supply sequencing is recommended for all CMOS devices. Do not exceed the absolute maximum ratings because stresses beyond the listed ratings can cause permanent damage to the devices. Always sequence V+ on first, then V-, followed by the logic inputs. If power-supply sequencing is not possible, add two small-signal diodes (D1, D2) in series with the supply pins for overvoltage protection (Figure 1). Adding diodes reduces the analog signal range to one diode drop below V+ and one diode drop above V-, but does not affect the devices’ low switch resistance. Device operation is unchanged, and the difference between V+ and V- should not exceed 6V. These protection diodes are not recommended when using a single supply. For single-supply operation, V- should be connected to GND as close to the device as possible. MAX4638/MAX4639 Detailed Description -2.5V * INTERNAL PROTECTION DIODES Figure 1. Overvoltage Protection Using External Blocking Diodes Ordering Information (continued) TEMP RANGE PIN-PACKAGE MAX4639EGE PART -40°C to +85°C 16 QFN (4 ✕ 4) MAX4639EUE -40°C to +85°C 16 TSSOP MAX4639ESE -40°C to +85°C 16 SO MAX4639EGP -40°C to +85°C 20 QFN (4 ✕ 4) Truth Tables MAX4638 (Single 8-to-1 Mux) MAX4639 (Dual 4-to-1 Mux) A2 A1 A0 EN ON SWITCH A1 A0 EN COMA X X X 0 None X X 0 None COMB None 0 1 NO1A NO1B 0 0 0 1 NO1 0 0 0 1 1 NO2 0 1 1 NO2A NO2B 0 1 0 1 NO3 1 0 1 NO3A NO3B 1 1 1 NO4A NO4B 0 1 1 1 NO4 1 0 0 1 NO5 1 0 1 1 NO6 1 1 0 1 NO7 1 1 1 1 NO8 _______________________________________________________________________________________ 9 MAX4638/MAX4639 3.5Ω, Single 8:1 and Dual 4:1, Low-Voltage Analog Multiplexers Test Circuits/Timing Diagrams V+ V+ NO1 A2 A1 A0 50Ω MAX4638 VIH VNO1 NO2–NO7 NO8 VNO8 EN COM GND VIN V- VOUT 100Ω 35pF ADDRESS INPUT VIN V- V+ A1 0 tTRANS NO1B 10% 90% SWITCH OUTPUT VOUT VNO1 NO1A–NO4A A0 50% VN01 V+ tR < 5ns tF < 5ns +3V VN08 50Ω MAX4639 VIH EN NO4B COMB V100Ω GND VIN tTRANS VNO8 VOUT 35pF V- Figure 2. Transition Time V+ VIH V+ EN A0 NO1 NO2–NO7 VNO1 ADDRESS +3V INPUT 0 VA MAX4638 VN0_ A1 VA tR < 5ns tF < 5ns 50% 90% VNO8 NO8 A2 GND COM VOUT V- 35pF 50Ω 100Ω SWITCH OUTPUT VOUT 0 tBBM V- Figure 3. MAX4638 Break-Before-Make Interval 10 ______________________________________________________________________________________ 3.5Ω, Single 8:1 and Dual 4:1, Low-Voltage Analog Multiplexers V+ VEN V+ EN NO1 VNO1 NO2–NO8 A0 A1 MAX4638 A2 COM GND 50Ω LOGIC INPUT VEN VOUT V- 35pF 100Ω VVEN NO1B A0 A1 SWITCH OUTPUT VOUT V+ EN 50% 0V VNO1 V+ VNO1 tR < 5ns tF < 5ns +3V 90% 90% 0V NO_, COMA tON(EN) MAX4639 COMB V- GND 50Ω tOFF(EN) VOUT 35pF 100Ω V- Figure 4. Enable Switching Time V+ RS V+ NO_ VEN VS CHANNEL SELECT LOGIC INPUT VEN EN A0 A1 MAX4638 MAX4639 COM +3V OFF ON OFF ON ON OFF 0 VOUT A2 GND V- CL 1nF ∆VOUT VOUT ∆VOUT IS THE MEASURED VOLTAGE DUE TO CHARGE TRANSFER ERROR Q WHEN THE CHANNEL TURNS OFF. VQ = ∆VOUT ✕ CL Figure 5. Charge Injection ______________________________________________________________________________________ 11 MAX4638/MAX4639 Test Circuits/Timing Diagrams (continued) MAX4638/MAX4639 3.5Ω, Single 8:1 and Dual 4:1, Low-Voltage Analog Multiplexers Test Circuits/Timing Diagrams (continued) V+ NO1 VIN RS = 50Ω V+ 1µF NO8 R 50Ω MAX4638 MAX4639 COM A0 A1 A2 V+ NO1 V+ GND EN V- VOUT VIN CL 5pF RL 50Ω NO2 NO8 A0 RG = 50Ω A1 A2 GND EN OFF-ISOLATION = 20log VOUT VEN A1 A0 VEN TRANSISTOR COUNT: 632 NO8 V- 1MHz CAPACITANCE ANALYZER COM f = 1MHz V- Figure 8. Channel OFF/ON Capacitance 12 VIN Figure 7. Crosstalk NO1 MAX4638 MAX4639 EN VOUT Chip Information V+ GND CL 5pF RL 50Ω CROSSTALK = 20log VIN V+ CHANNEL SELECT V1µF V- Figure 6. Off-Isolation/On-Channel Bandwidth A2 VOUT MAX4638 COM MAX4639 VVEN 1µF ______________________________________________________________________________________ 3.5Ω, Single 8:1 and Dual 4:1, Low-Voltage Analog Multiplexers NO3A 4 11 NO1B 10 NO2B 9 NO3B EN A0 A1 GND 15 14 13 A2 13 16 A1 14 N.C. A1 N.C. 18 17 16 N.C. 16 A0 A2 17 19 A1 18 N.C. A0 20 N.C. 19 QFN 20 QFN V+ 8 NO6 9 MAX4639 12 NO4B 3 7 2 NO2A COMB NO1A NO5 10 6 V+ 11 5 1 GND NO4A A0 8 V- 12 COMA EN 15 NO7 4 7 NO3 MAX4638 NO8 3 6 2 NO2 COM NO1 5 1 NO4 V- 16 TOP VIEW EN 1 15 GND EN 1 15 GND V- 2 14 V+ V- 2 14 V+ NO1 3 13 NO5 NO1A 3 13 NO1B NO2B NO3B MAX4639 9 10 NO4B 7 COMA COMB 6 NO4A QFN 8 10 11 NO8 5 9 4 NO3A N.C. NO2A NO7 8 NO6 12 N.C. 7 11 6 5 NO4 4 NO3 COM NO2 12 N.C. MAX4638 QFN ______________________________________________________________________________________ 13 MAX4638/MAX4639 Pin Configurations (continued) 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.) TSSOP.EPS MAX4638/MAX4639 3.5Ω, Single 8:1 and Dual 4:1, Low-Voltage Analog Multiplexers 14 ______________________________________________________________________________________ 3.5Ω, Single 8:1 and Dual 4:1, Low-Voltage Analog Multiplexers SOICN.EPS 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 © 2002 Maxim Integrated Products Printed USA is a registered trademark of Maxim Integrated Products. MAX4638/MAX4639 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.)