19-1782; Rev 2; 2/04 3.5, 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 3.5 on-resistance (RON) when powered with a single +5V supply and have -75dB 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 +25C. Guaranteed RON 3.5 (+5V or 2.5V Supplies) 6 (+3V Supply) Guaranteed 0.4 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(R) 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 thin QFN, TSSOP, and SO packages, as well as a 20-pin thin QFN package. +1.8V to +5.5V Single-Supply Operation 2.5V Dual-Supply Operation Rail-to-Rail Signal Handling Guaranteed 1 RON Flatness Over Signal Range Guaranteed Low Leakage Currents 0.25nA at +25C Switching Times: tON = 18ns, tOFF = 7ns TTL/CMOS-Logic Compatible Crosstalk: -80dB (1MHz) Off-Isolation: -60dB (10MHz) Applications Automatic Test Equipment Ordering Information PART TEMP RANGE PIN-PACKAGE Low-Voltage Data-Acquisition Systems MAX4638ETE -40C to +85C 16 Thin QFN (4 4) Audio and Video Signal Routing MAX4638EUE -40C to +85C 16 TSSOP Medical Equipment MAX4638ESE -40C to +85C 16 SO Battery-Powered Equipment MAX4638ETP -40C to +85C 20 Thin QFN (4 4) Ordering Information continued at end of data sheet. Relay Replacement Pin Configurations/Functional Diagrams TOP VIEW MAX4638 MAX4639 A0 1 16 A1 A0 1 EN 2 15 A2 EN 2 V- 3 LOGIC 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 COM 8 9 NO8 COMA 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 3.5, 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_ (Note 1) ................................... -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 = +70C) 16-Pin Thin QFN (derate 16.9mW/C above +70C)....1349mW 16-Pin TSSOP (derate 5.7mW/C above +70C)............457mW 16-Pin SO (derate 8.70mW/C above +70C) ...............696mW 20-Pin Thin QFN (derate 16.9mW/C above +70C)....1349mW Operating Temperature Range MAX463_E_ E ................................................-40C to +85C Junction Temperature ......................................................+150C Storage Temperature Range ............................-65C to +150C Lead Temperature (soldering, 10s) ................................+300C 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 = +25C.) (Note 9) 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_ 0 RON V+ = +4.5V, ICOM_ = 10mA, TA = +25C VNO_ = +3.5V TA = TMIN to TMAX 2.5 RON V+ = +4.5V, ICOM_ = 10mA, TA = +25C VNO_ = +3.5V TA = TMIN to TMAX 0.1 V+ = +4.5V; ICOM_ = 10mA; TA = +25C VNO_ = +1V, +2V, +3.5V TA = TMIN to TMAX V+ = +5.5V; VCOM _ = +1V, TA = +25C +4.5V; VNO_ = +4.5V, +1V TA = TMIN to TMAX 0.75 On-Resistance Flatness (Note 4) RFLAT(ON) NO_ Off-Leakage Current (Note 5) INO_(OFF) 3.5 4.5 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 = +25C -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 = +25C -0.25 TA = TMIN to TMAX -0.75 0.25 0.35 0.01 0.25 0.75 0.01 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 A 2 pF DYNAMIC Transition Time (Note 5) 2 tTRANS RL = 100, CL = 35pF, VNO1 = +3V or 0, VNO8 = 0 or +3V, Figure 2 TA = +25C 14 18 ns TA = TMIN to TMAX _______________________________________________________________________________________ 20 3.5, 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 = +25C.) (Note 9) 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 = 100, CL = 35pF, VNO_ = +3V, Figure 3 TA = +25C RL = 100, CL = 35pF, VNO1 = +3V, VNO2 to VNO8 = 0, Figure 4 TA = +25C tON(EN) RL = 100, CL = 35pF, VNO1 = +3V, VNO2 to VNO8 = 0, Figure 4 TA = +25C tOFF(EN) BW Q Signal = 0dBm, CL = 5pF, 50 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 = +25C 8 50 MHz MAX4639 13 pC VNO_ = 0V, f = 1MHz, Figure 8 TA = +25C 9 pF MAX4638 TA = +25C 40 MAX4639 TA = +25C 20 MAX4638 TA = +25C 54 MAX4639 TA = +25C 34 TA = +25C -55 VCOM_ = VNO_ = 0V, f = 1MHz, Figure 8 pF pF CL = 5pF, RL = 50, f = 1MHz, VNO_ = 1VRMS , Figure 6 Crosstalk (Note 7) ns 1 TA = +25C 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 = +25C NO_ Off-Capacitance Switch On-Capacitance MAX4638 TA = TMIN to TMAX MIN dB CL = 5pF, RL = 50, f = 10MHz, VNO_ = 1VRMS , Figure 6 TA = +25C -75 CL = 5pF, RL = 50, f = 10MHz, VNO_= 1VRMS , Figure 7 TA = +25C -65 CL = 5pF, RL = 50, f = 1MHz, VNO_ = 1VRMS, Figure 7 TA = +25C -85 RL = 600, RFLAT(ON)/RL TA = +25C 0.5 dB % SUPPLY Positive Supply Current I+ V+ = +5.5V, VIN = 0 or V+ 0.001 1.0 A _______________________________________________________________________________________ 3 MAX4638/MAX4639 ELECTRICAL CHARACTERISTICS--+5V Single Supply (continued) MAX4638/MAX4639 3.5, 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 = +25C.) (Note 9) 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 = +25C RON ICOM_ = 10mA, VNO_ = +1.7V TA = +25C ICOM_ = 10mA; VNO_ = +1.5V, +1.7V, +1.9V TA = +25C RFLAT(ON) 4.5 TA = TMIN to TMAX 8 0.25 TA = TMIN to TMAX 1 TA = TMIN to TMAX 2 2.5 TA = +25C -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 = +25C -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 = +25C -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 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 A 2 pF DYNAMIC tTRANS VNO_ = +2V, CL = 35pF, RL = 100, Figure 2 TA = +25C tBBM VNO_ = +2V, CL = 35pF, RL = 100, Figure 3 TA = +25C Enable Turn-On Time (Note 5) tON(EN) VNO_ = +2V, CL = 35pF, RL = 100, Figure 4 TA = +25C Enable Turn-Off Time (Note 5) tOFF(EN) VNO_ = +2V, CL = 35pF, RL = 100, Figure 4 TA = +25C 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 3.5, 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 = +25C.) (Note 9) PARAMETER Off-Isolation (Note 6) Crosstalk (Note 7) SYMBOL VISO VCT On-Channel -3dB Bandwidth BW CONDITIONS TA = +25C CL = 5pF, RL = 50, f = 1MHz, VNO_ = 1VRMS, Figure 6 TA = +25C -75 CL = 5pF, RL = 50, f = 10MHz, VNO_ = 1VRMS, Figure 7 TA = +25C -65 dB -85 TA = +25C 50 TA = +25C 85 TA = +25C 9 MAX4638 TA = +25C 40 MAX4639 TA = +25C 20 VCOM = VNO_ MAX4638 = 0V, f = 1MHz, MAX4639 Figure 8 TA = +25C 54 TA = +25C 34 Signal = MAX4638 0dBm, 50 in and out, MAX4639 Figure 6 VNO_ = 0V, f = 1MHz, Figure 8 VCOM_ = 0V, CCOM_(OFF) f = 1MHz, Figure 8 I+ UNITS 55 TA = +25C COM_ Off-Capacitance SUPPLY Positive Supply Current MAX dB CL = 5pF, RL = 50, f = 1MHz, VNO_ = 1VRMS, Figure 7 CNO_(OFF) C(ON) TYP (Note 2 ) CL = 5pF, RL = 50, 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 A 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 = +25C.) 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_ V- RON ICOM_ = 10mA, VNO_ = 1.5V, TA = +25C V+ = +2.25V, V- = -2.25V TA = TMIN to TMAX 2.5 RON ICOM_ = 10mA, VNO_ = 1.5V, TA = +25C V+ = +2.25V, V- = -2.25V TA = TMIN to TMAX 0.2 3.5 4.5 0.4 0.5 _______________________________________________________________________________________ 5 MAX4638/MAX4639 ELECTRICAL CHARACTERISTICS--+3.0V Single Supply (continued) MAX4638/MAX4639 3.5, 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 = +25C.) PARAMETER SYMBOL CONDITIONS On-Resistance Flatness (Note 4) I = 10mA; VNO_ = 1.5V, TA = +25C 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 ) 0.75 MAX 1 1.2 TA = +25C -0.25 TA = TMIN to TMAX -0.35 0.01 UNITS 0.25 nA COM_ Off-Leakage Current (Note 5) V+ = +2.75V; V- = -2.75; ICOM_ (OFF) VCOM_ = +1V, +2.5V; VNO_ = +2.5V, +1V TA = +25C -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 = +25C -0.25 TA = TMIN to TMAX -0.35 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 V 0.4 VIN_ = 0 or V+ -0.1 CIN 0.005 0.1 2 V A 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 = 100, Figure 2 TA = +25C VNO_ = +1.2V, CL = 35pF, RL = 100, Figure 4 TA = +25C VNO_ = +1.2V, CL = 35pF, RL = 100, Figure 4 TA = +25C VNO_ = +1.2V, CL = 35pF, RL = 100, Figure 3 TA = +25C 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 thin QFN packaged parts are guaranteed by design. Note 9: Parts are tested at +85C and guaranteed by design over the entire temperature range. 6 ______________________________________________________________________________________ 3.5, Single 8:1 and Dual 4:1, Low-Voltage Analog Multiplexers 20 V+ = +5V 3.5 6 TA = +85C V+ = +3V 5 TA = +85C 10 4 2.5 2.0 TA = -40C RON () R0N () TA = +25C 1.5 V+ = +3V 1 0.5 V+ = +5V 0 0 0 VCOM (V) SUPPLY CURRENT vs. SUPPLY VOLTAGE V+ = +5V 12 10 8 6 100 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 = -40C 1.2 tON 25 20 TA = +85C 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 = +25C 1.8 14 30 TIME (ns) 1.4 16 MAX4638 toc08 45 MAX4638 toc07 1.8 LOGIC VOLTAGE (V) 3.0 1 4 80 2.5 10 SUPPLY CURRENT (nA) 120 2.0 SUPPLY CURRENT vs. TEMPERATURE 14 140 1.5 CHARGE INJECTION vs. VCOM 16 160 CHARGE (pC) SUPPLY CURRENT (pA) 180 1.0 VCOM (V) V = 2.5V 18 0.5 VCOM (V) 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 = +25C TA = -40C 2 1.0 5 0 3 MAX4638 toc09 RON () 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 = +25C, unless otherwise noted.) Typical Operating Characteristics (continued) (V+ = +5V, V- = 0, TA = +25C, unless otherwise noted.) OFF-ISOLATION -60 CROSSTALK 10 -120 1 OFF-LEAKAGE 0.06 0.04 0.1 0.02 0 0.001 0.01 0.1 1 10 100 MAX4638 toc12 ON-LEAKAGE 0.01 -100 V+ = +2.5V V- = -2.5V 5Vp-p SIGNAL 600 IN AND OUT 0.08 THD (%) -40 -80 100 LEAKAGE CURRENT (pA) 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 3.5, Single 8:1 and Dual 4:1, Low-Voltage Analog Multiplexers 1000 -40 -20 0 FREQUENCY (MHz) 20 40 60 0.01 80 0.1 1 10 100 FREQUENCY (kHz) TEMPERATURE (C) Pin Description PIN MAX4638 MAX4639 NAME THIN QFN DIP/SO DIP/SO 8 FUNCTION THIN 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. Not internally connected. -- EP EP -- EP EP PAD Exposed Pad. Connect to V-. Positive-Supply Voltage Input _______________________________________________________________________________________ 3.5, Single 8:1 and Dual 4:1, Low-Voltage Analog Multiplexers +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 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 * INTERNAL PROTECTION DIODES Figure 1. Overvoltage Protection Using External Blocking Diodes Ordering Information (continued) PART TEMP RANGE PIN-PACKAGE MAX4639ETE -40C to +85C 16 Thin QFN (4 4) MAX4639EUE -40C to +85C 16 TSSOP MAX4639ESE -40C to +85C 16 SO MAX4639ETP -40C to +85C 20 Thin QFN (4 4) Truth Tables MAX4638 (Single 8-to-1 Mux) A2 A1 A0 EN MAX4639 (Dual 4-to-1 Mux) ON SWITCH A1 A0 EN COMA COMB X 0 None None X X X 0 None X 0 0 0 1 NO1 0 0 1 NO1A NO1B 0 0 1 1 NO2 0 1 1 NO2A NO2B 0 1 NO3A NO3B 1 1 NO4A NO4B 0 1 0 1 NO3 1 0 1 1 1 NO4 1 1 0 0 1 NO5 1 0 1 1 NO6 1 1 0 1 NO7 1 1 1 1 NO8 _______________________________________________________________________________________ 9 MAX4638/MAX4639 3.5, Single 8:1 and Dual 4:1, Low-Voltage Analog Multiplexers Test Circuits/Timing Diagrams V+ V+ NO1 A2 A1 A0 50 MAX4638 VIH VNO1 NO2-NO7 NO8 VNO8 EN COM GND VIN V- VOUT 100 35pF ADDRESS INPUT VIN A1 VN01 NO1B 10% 90% SWITCH OUTPUT VOUT VNO1 NO1A-NO4A A0 50% 0V tTRANS VV+ V+ tR < 5ns tF < 5ns +3V VN08 50 MAX4639 VIH EN COMB V100 GND VIN tTRANS VNO8 NO4B VOUT 35pF V- Figure 2. Transition Time V+ VIH V+ EN A0 NO1 NO2-NO7 VNO1 ADDRESS +3V INPUT 0V VA MAX4638 50% VN0_ A1 VA tR < 5ns tF < 5ns 90% VNO8 NO8 A2 GND COM VOUT V- 35pF 50 100 SWITCH OUTPUT VOUT 0V tBBM V- Figure 3. MAX4638 Break-Before-Make Interval 10 ______________________________________________________________________________________ 3.5, 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 50 LOGIC INPUT VEN VOUT V- 35pF 100 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 50 tOFF(EN) VOUT 35pF 100 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 0V 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 3.5, Single 8:1 and Dual 4:1, Low-Voltage Analog Multiplexers Test Circuits/Timing Diagrams (continued) V+ NO1 VIN RS = 50 V+ 1F NO8 R 50 MAX4638 MAX4639 COM A0 A1 A2 V+ NO1 V+ GND EN V- VOUT VIN NO2 NO8 A0 RG = 50 CL 5pF RL 50 A1 A2 GND EN OFF-ISOLATION = 20log VOUT VEN A1 A0 VEN Figure 7. Crosstalk TRANSISTOR COUNT: 632 NO8 V- 1MHz CAPACITANCE ANALYZER Note: Exposed pad on thin QFN packages is connected to V-. COM f = 1MHz V- Figure 8. Channel Off/On-Capacitance 12 VIN NO1 MAX4638 MAX4639 EN VOUT Chip Information V+ GND CROSSTALK = 20log VIN V+ CHANNEL SELECT V- CL 5pF RL 50 1F V- Figure 6. Off-Isolation/On-Channel Bandwidth A2 VOUT MAX4638 COM MAX4639 VVEN 1F ______________________________________________________________________________________ 3.5, Single 8:1 and Dual 4:1, Low-Voltage Analog Multiplexers NO2 3 NO3 4 A1 GND 14 13 V+ V+ NO1A 2 11 NO1B 10 NO5 NO2A 3 10 NO2B 9 NO6 NO3A 4 9 NO3B 5 6 7 8 5 NO4 COM NO8 NO7 NO4A MAX4639 A0 N.C. A1 N.C. 18 17 16 N.C. 16 19 A2 17 N.C. A1 18 20 A0 15 GND 14 V+ 2 14 V+ 13 NO5 NO1A 3 13 NO1B 4 12 NO6 NO2A 4 12 NO2B 5 11 5 11 NO3B THIN QFN 7 8 9 10 COMA N.C. COMB NO4B 6 NO4A NO3A 10 NO7 MAX4639 NO8 NO4 6 MAX4638 9 NO2 N.C. 1 V- N.C. 3 19 EN 8 NO1 NO3 GND 15 N.C. 2 7 1 V- COM EN THIN QFN 20 THIN QFN 8 11 A0 12 NO4B 2 EN 1 7 NO1 MAX4638 V- COMB GND 15 A2 13 12 16 A1 14 1 6 A0 15 V- COMA EN 16 TOP VIEW THIN 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.) TSSOP4.40mm.EPS MAX4638/MAX4639 3.5, Single 8:1 and Dual 4:1, Low-Voltage Analog Multiplexers 14 ______________________________________________________________________________________ 3.5, Single 8:1 and Dual 4:1, Low-Voltage Analog Multiplexers 24L QFN THIN.EPS PACKAGE OUTLINE 12, 16, 20, 24L THIN QFN, 4x4x0.8mm 21-0139 C 1 2 PACKAGE OUTLINE 12, 16, 20, 24L THIN QFN, 4x4x0.8mm 21-0139 C 2 2 ______________________________________________________________________________________ 15 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.) 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.) DIM A A1 B C e E H L N E H INCHES MILLIMETERS MAX MIN 0.069 0.053 0.010 0.004 0.014 0.019 0.007 0.010 0.050 BSC 0.150 0.157 0.228 0.244 0.016 0.050 MAX MIN 1.35 1.75 0.10 0.25 0.35 0.49 0.19 0.25 1.27 BSC 3.80 4.00 5.80 6.20 0.40 SOICN .EPS MAX4638/MAX4639 3.5, Single 8:1 and Dual 4:1, Low-Voltage Analog Multiplexers 1.27 VARIATIONS: 1 INCHES TOP VIEW DIM D D D MIN 0.189 0.337 0.386 MAX 0.197 0.344 0.394 MILLIMETERS MIN 4.80 8.55 9.80 MAX 5.00 8.75 10.00 N MS012 8 AA 14 AB 16 AC D A B e C 0-8 A1 L FRONT VIEW SIDE VIEW PROPRIETARY INFORMATION TITLE: PACKAGE OUTLINE, .150" SOIC APPROVAL DOCUMENT CONTROL NO. 21-0041 REV. B 1 1 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. 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