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MAX4567EEE+T

hot MAX4567EEE+T

MAX4567EEE+T

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Part Number MAX4567EEE+T
Manufacturer Maxim Integrated
Description IC VIDEO SWITCH DUAL SPDT 16QSOP
Datasheet MAX4567EEE+T Datasheet
Package 16-SSOP (0.154", 3.90mm Width)
In Stock 1115 piece(s)
Unit Price $ 2.7907 *
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MAX4567EEE+T

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MAX4567EEE+T Specifications

ManufacturerMaxim Integrated
CategoryIntegrated Circuits (ICs) - Interface - Analog Switches - Special Purpose
Datasheet MAX4567EEE+T Datasheet
Package16-SSOP (0.154", 3.90mm Width)
Series-
ApplicationsVideo
Multiplexer/Demultiplexer Circuit2:1
Switch CircuitSPDT
Number of Channels2
On-State Resistance (Max)60 Ohm
Voltage - Supply, Single (V+)2.7 V ~ 12 V
Voltage - Supply, Dual (V��)��2.7 V ~ 6 V
-3db Bandwidth350MHz
FeaturesBi-Directional, Break-Before-Make, T-Switch Configuration
Operating Temperature-40°C ~ 85°C (TA)
Package / Case16-SSOP (0.154", 3.90mm Width)
Supplier Device Package16-QSOP

MAX4567EEE+T Datasheet

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_______________General Description The MAX4565/MAX4566/MAX4567 are low-voltage T-switches designed for switching RF and video signals from DC to 350MHz in 50Ω and 75Ω systems. The MAX4565 contains four normally open single-pole/single- throw (SPST) switches. The MAX4566 contains two dual SPST switches (one normally open, one normally closed.) The MAX4567 contains two single-pole/double-throw (SPDT) switches. Each switch is constructed in a “T” configuration, ensuring excellent high-frequency off isolation and crosstalk of -83dB at 10MHz. They can handle Rail-to-Rail® analog sig- nals in either direction. On-resistance (60Ω max) is matched between switches to 2.5Ω max and is flat (2Ω max) over the specified signal range, using ±5V supplies. The off leakage current is less than 5nA at +25°C and 50nA at +85°C. These CMOS switches can operate with dual power sup- plies ranging from ±2.7V to ±6V or a single supply between +2.7V and +12V. All digital inputs have 0.8V/2.4V logic thresholds, ensuring both TTL- and CMOS-logic com- patibility when using ±5V or a single +5V supply. ________________________Applications RF Switching Video Signal Routing High-Speed Data Acquisition Test Equipment ATE Equipment Networking ____________________________Features ♦ High 50Ω Off Isolation: -83dB at 10MHz ♦ Low 50Ω Crosstalk: -87dB at 10MHz ♦ DC to 350MHz -3dB Signal Bandwidth ♦ 60Ω Signal Paths with ±5V Supplies ♦ 2.5Ω Signal-Path Matching with ±5V Supplies ♦ 2Ω Signal-Path Flatness with ±5V Supplies ♦ Low 50Ω Insertion Loss: 2.5dB at 100MHz ♦ ±2.7V to ±6V Dual Supplies +2.7V to +12V Single Supply ♦ Low Power Consumption: <1µW ♦ Rail-to-Rail Bidirectional Signal Handling ♦ Pin Compatible with Industry-Standard DG540, DG542, DG643 ♦ >2kV ESD Protection per Method 3015.7 ♦ TTL/CMOS-Compatible Inputs with Single +5V or ±5V M A X 4 5 6 5 /M A X 4 5 6 6 /M A X 4 5 6 7 Quad/Dual, Low-Voltage, Bidirectional RF/Video Switches ________________________________________________________________ Maxim Integrated Products 1 TOP VIEW 16 15 14 13 12 11 10 9 1 2 3 4 5 6 7 8 MAX4566 DIP/SO/QSOP IN2 COM2 GND2 NO2 V+ NC3 GND3 COM3 N01 GND1 COM1 IN1 COM4 GND4 NC4 V- 20 19 18 17 16 15 14 13 1 2 3 4 5 6 7 8 IN2 COM2 GND2 NO2N01 GND1 COM1 IN1 V+ GND6 N03 GND3GND4 N04 GND5 V- 12 11 9 10 COM3 IN3IN4 COM4 MAX4565 DIP/SO/SSOP 16 15 14 13 12 11 10 9 1 2 3 4 5 6 7 8 MAX4567 DIP/SO/QSOP N02 V+ GND2 COM2 GND3 V- NC2 IN2 GND1 V- N01 IN1 NC1 V+ GND4 COM1 MAX4565 SWITCHES SHOWN FOR LOGIC “0” INPUT LOGIC SWITCH 0 1 OFF ON MAX4567 LOGIC NO-COM 0 1 OFF ON NC-COM ON OFF MAX4566 LOGIC 1, 2 0 1 OFF ON 3, 4 ON OFF _____________________Pin Configurations/Functional Diagrams/Truth Tables 19-1252; Rev 0; 7/97 ______________Ordering Information Ordering Information continued at end of data sheet. Rail-to-Rail is a registered trademark of Nippon Motorola Ltd. PART MAX4565CPP MAX4565CWP 0°C to +70°C 0°C to +70°C TEMP. RANGE PIN-PACKAGE 20 Plastic DIP 20 Wide SO For free samples & the latest literature: http://www.maxim-ic.com, or phone 1-800-998-8800. For small orders, phone 408-737-7600 ext. 3468.

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M A X 4 5 6 5 /M A X 4 5 6 6 /M A X 4 5 6 7 Quad/Dual, Low-Voltage, Bidirectional RF/Video Switches 2 _______________________________________________________________________________________ ABSOLUTE MAXIMUM RATINGS ELECTRICAL CHARACTERISTICS—Dual Supplies (V+ = +4.5V to +5.5V, V- = -4.5V to -5.5V, VINL = 0.8V, VINH = 2.4V, VGND_ = 0V, TA = TMIN to TMAX, unless otherwise noted. Typical values are at TA = +25°C.) 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. (Voltages Referenced to GND) V+ ...........................................................................-0.3V, +13.0V V- ............................................................................-13.0V, +0.3V V+ to V-...................................................................-0.3V, +13.0V All Other Pins (Note 1) ..........................(V- - 0.3V) to (V+ + 0.3V) Continuous Current into Any Terminal..............................±25mA Peak Current into Any Terminal (pulsed at 1ms, 10% duty cycle)..................................±50mA ESD per Method 3015.7 ..................................................>2000V Continuous Power Dissipation (TA = +70°C) (Note 2) 16-Pin Plastic DIP (derate 10.53mW/°C above +70°C)..........................842mW 16-Pin Narrow SO (derate 8.70mW/°C above +70°C)............................696mW 16-Pin QSOP (derate 8.3mW/°C above +70°C).......... 667mW 20-Pin Plastic DIP (derate 8.0mW/°C above +70°C) ...640mW 20-Pin Wide SO (derate 10.00mW/°C above +70°C) .. 800mW 20-Pin SSOP (derate 8.0mW/°C above +70°C) .......... 640mW Operating Temperature Ranges MAX456_C_ E .....................................................0°C to +70°C MAX456_E_ E ..................................................-40°C to +85°C Storage Temperature Range .............................-65°C to +150°C Lead Temperature (soldering, 10sec) .............................+300°C Note 1: Voltages on all other pins exceeding V+ or V- are clamped by internal diodes. Limit forward diode current to maximum cur- rent rating. V+ = 4.5V, V- = -4.5V, VCOM_ = ±2V, ICOM_ = 10mA (Note 3) V+ = 5.5V, V- = -5.5V, VCOM_ = ±4.5V V+ = 4.5V, V- = -4.5V, VCOM_ = ±2V, ICOM_ = 10mA V+ = 5V; V- = -5V; VCOM_ = 1V, 0V, -1V; ICOM = 10mA V+ = 5.5V, V- = -5.5V, VCOM_ = ±4.5V, VN_ = 4.5V V+ = 5.5V, V- = -5.5V, VCOM_ = ±4.5V, VN_ = 4.5V VIN_ = 0.8V or 2.4V CONDITIONS µA-1 0.03 1IINH_, IINL_ IN_ Input Current Logic High or Low Ω 46 60 RONSignal-Path On-Resistance VV- V+ VCOM_, VNO_,VNC_ Analog Signal Range V0.8 1.5VIN_LIN_ Input Logic Threshold Low V1.5 2.4VIN_HIN_ Input Logic Threshold High nA -2 0.04 2 ICOM_(ON) COM_ On Leakage Current (Note 6) Ω 1 2.5 ∆ RON Signal-Path On-Resistance Match Between Channels (Note 4) Ω0.3 2RFLAT(ON) Signal-Path On-Resistance Flatness (Note 5) nA -1 0.02 1INO_(OFF), INC_(OFF) NO_, NC_ Off Leakage Current (Note 6) nA -1 0.02 1 ICOM_(OFF) COM_ Off Leakage Current (Note 6) UNITS MIN TYP MAX (Note 2) SYMBOLPARAMETER +25°C C, E C, E C, E +25°C +25°C +25°C +25°C +25°C C, E TA C, E C, E C, E -10 10 -10 10 -20 20 C, E C, E 3 80 ANALOG SWITCH LOGIC INPUT ± ±

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MAX4565 M A X 4 5 6 5 /M A X 4 5 6 6 /M A X 4 5 6 7 Quad/Dual, Low-Voltage, Bidirectional RF/Video Switches _______________________________________________________________________________________ 3 VIN = 5Vp-p, f < 20kHz, 600Ω in and out Figure 6, RL = 50Ω VNO_ = GND, f = 1MHz, Figure 7 CL = 1.0nF, VNO_ = 0V, RS = 0Ω , Figure 5 VCOM_ = ±3V, V+ = 5V, V- = -5V, Figure 4 VCOM_ = ±3V, V+ = 5V, V- = -5V, Figure 3 VCOM_ = ±3V, V+ = 5V, V- = -5V, Figure 3 CONDITIONS %0.02THD+NDistortion MHz350BW-3dB Bandwidth (Note 9) -83 6 COM_ Off Capacitance pF2.5CN_(OFF)NO_, NC_ Off Capacitance pC25 60Q Charge Injection (Note 3) ns5 30tBBM Break-Before-Make Time Delay (MAX4566/MAX4567 only) ns 30 100 tOFFTurn-Off Time ns 75 150 tONTurn-On Time UNITS MIN TYP MAX (Note 2) SYMBOLPARAMETER V- = -5.5V V+ = 5.5V, all VIN_ = 0V or V+ µA -1 0.05 1 I-V - Supply Current µA -1 0.05 1 I+V+ Supply Current V-6 +6V+, V-Power-Supply Range +25°C +25°C +25°C +25°C +25°C +25°C +25°C TA +25°C +25°C C, E 2.5 VCOM_ = 0V, f = 1MHz, Figure 7 pFCCOM_(OFF) +25°C 6 VCOM_ = VNO_ = 0V, f = 1MHz, Figure 7 pF 7 CCOM_(ON)COM_ On Capacitance +25°C -82 RL = 50Ω , VCOM_ = 1VRMS, f = 10MHz, Figure 6 dB -83 VISOOff Isolation (Note 7) +25°C MAX4565 MAX4566 MAX4567 MAX4565 MAX4566 MAX4567 C, E -10 10 C, E -10 10 C, E 120 C, E 200 ELECTRICAL CHARACTERISTICS—Dual Supplies (continued) (V+ = +4.5V to +5.5V, V- = -4.5V to -5.5V, VINL = 0.8V, VINH = 2.4V, VGND_ = 0V, TA = TMIN to TMAX, unless otherwise noted. Typical values are at TA = +25°C.) MAX4565, MAX4566 -92MAX4565 MAX4566 MAX4567 -85 RL = 50Ω , VCOM_ = 1VRMS, f = 10MHz, Figure 6 dB -87 VCT Channel-to-Channel Crosstalk (Note 8) +25°C SWITCH DYNAMIC CHARACTERISTICS POWER SUPPLY

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MAX4567 M A X 4 5 6 5 /M A X 4 5 6 6 /M A X 4 5 6 7 Quad/Dual, Low-Voltage, Bidirectional RF/Video Switches 4 _______________________________________________________________________________________ RL = 50Ω , Figure 6 CL = 1.0nF, VNO = 2.5V, RS = 0Ω , Figure 5 VCOM_ = 3V, V+ = 5V, Figure 4 V+ = 4.5V, VCOM_ = 3.5V, ICOM_ = 1mA VCOM_ = 3V, V+ = 5V, Figure 3 (Note 3) VCOM_ = 3V, V+ = 5V, Figure 3 VIN_ = 0.8V or 2.4V V+ = 5.5V; VCOM_ = 1V, 4.5V V+ = 5.5V, VCOM_ = 1V, VN_ = 4.5V V+ = 4.5V, VCOM_ = 3.5V, ICOM_ = 1mA V+ = 5.5V, VCOM_ = 1V, VN_ = 4.5V CONDITIONS 320BW-3dB Bandwidth (Note 9) pC7 25QCharge Injection ns10 90tBBM Break-Before-Make Time Delay (MAX4566/MAX4567 only) ns 150 30 120 tOFFTurn-Off Time ns 250 130 200 tONTurn-On Time µA-1 0.001 1IINH_, IINL_ IN_ Input Current Logic High or Low V0.8 1.5VIN_LIN_ Input Logic Threshold Low V1.5 2.4VIN_HIN_ Input Logic Threshold High nA -20 20 68 120 RONSignal-Path On-Resistance V0 V+ VCOM_, VNO_, VNC_ Analog Signal Range -2 2 ICOM_(ON) COM_ On Leakage Current (Notes 6, 10) nA -10 10 -1 1 ICOM_(OFF) COM_ Off Leakage Current (Notes 6, 10) nA -10 10 Ω 150 2 5 ∆ RON Signal-Path On-Resistance Match Ω 6 -1 1INO_(OFF), INC_(OFF) NO_, NC_ Off Leakage Current (Notes 6, 10) UNITS MIN TYP MAX (Note 2) SYMBOLPARAMETER MHz+25°C +25°C +25°C +25°C C, E +25°C +25°C C, E +25°C C, E +25°C C, E C, E C, E +25°C C, E C, E +25°C C, E +25°C C, E TA ELECTRICAL CHARACTERISTICS—Single +5V Supply (V+ = +4.5V to +5.5V, V- = 0V, VINL = 0.8V, VINH = 2.4V, VGND_ = 0V, TA = TMIN to TMAX, unless otherwise noted. Typical values are at TA = +25°C.) V+ = 5.5V, all VIN_ = 0V or V+ -1 0.05 1 I+V+ Supply Current µA -10 10 +25°C C, E RL = 50Ω , f = 10MHz, VCOM_ = 1VRMS, Figure 6 dB-81VISO Off-Isolation (Note 7) +25°C RL = 50Ω , f = 10MHz, VCOM_ = 1VRMS, Figure 6 dB-86VCT Channel-to-Channel Crosstalk (Note 8) +25°C ANALOG SWITCH LOGIC INPUT SWITCH DYNAMIC CHARACTERISTICS POWER SUPPLY

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V+ Supply Current M A X 4 5 6 5 /M A X 4 5 6 6 /M A X 4 5 6 7 Quad/Dual, Low-Voltage, Bidirectional RF/Video Switches _______________________________________________________________________________________ 5 ELECTRICAL CHARACTERISTICS—Single +3V Supply (V+ = +2.7V to +3.6V, V- = 0V, VINL = 0.8V, VINH = 2.4V, VGND_ = 0V, TA = TMIN to TMAX, unless otherwise noted. Typical values are at TA = +25°C.) V+ = 2.7V, VCOM_ = 1V, ICOM_ = 1mA (Note 3) V+ = 3.6V, all VIN_ = 0V or V+ VCOM_ = 1.5V, V+ = 2.7V, Figure 3 (Note 3) VCOM_ = 1.5V, V+ = 2.7V, Figure 4 (Note 3) VIN_ = 0.8V or 2.4V (Note 3) (Note 3) (Note 3) VCOM_ = 1.5V, V+ = 2.7V, Figure 3 (Note 3) CONDITIONS µA -1 0.05 1 I+V+ Supply Current ns10 120tBBM Break-Before-Make Time Delay (MAX4566/MAX4567 only) ns 120 40 100 tOFFTurn-Off Time 150 350 RONSignal-Path On-Resistance V0 V+ VCOM_, VNO_, VNC_ Analog Signal Range ns 600 270 500 tONTurn-On Time µA-1 1IINH_, IINL_ IN_ Input Current Logic High or Low Ω 450 V1.0 2.4VIN_HIN_ Input Logic Threshold High V0.8 1.0VIN_LIN_ Input Logic Threshold Low UNITS MIN TYP MAX (Note 2) SYMBOLPARAMETER +25°C +25°C +25°C C, E +25°C +25°C C, E C, E C, E C, E C, E +25°C TA -10 10C, E ANALOG SWITCH LOGIC INPUT SWITCH DYNAMIC CHARACTERISTICS (Note 3) POWER SUPPLY Note 2: The algebraic convention is used in this data sheet; the most negative value is shown in the minimum column. Note 3: Guaranteed by design. Note 4: ∆ RON = ∆ RON(MAX) - ∆ RON(MIN). Note 5: Resistance flatness is defined as the difference between the maximum and the minimum value of on-resistance as mea- sured over the specified analog signal range. Note 6: Leakage parameters are 100% tested at the maximum rated hot temperature and guaranteed by correlation at +25°C. Note 7: Off isolation = 20log10 [VCOM / (VNC or VNO)], VCOM = output, VNC or VNO = input to off switch. Note 8: Between any two switches. Note 9: -3dB bandwidth is measured relative to 100kHz. Note 10: Leakage testing for single-supply operation is guaranteed by testing with dual supplies.

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M A X 4 5 6 5 /M A X 4 5 6 6 /M A X 4 5 6 7 Quad/Dual, Low-Voltage, Bidirectional RF/Video Switches 6 _______________________________________________________________________________________ __________________________________________Typical Operating Characteristics (V+ = +5V, V- = -5V, TA = +25°C, GND = 0V, packages are surface mount, unless otherwise noted.) 1000 10 -5 -3-4 0 1 2 3 4-1-2 5 ON RESISTANCE vs. VCOM (DUAL SUPPLIES) M A X 4 5 6 5 T O C 0 1 VCOM (V) R O N (Ω ) 100 V+ = 1.2V, V- = -1.2V V+ = 5V, V- = -5V V+ = 3.3V, V- = -3.3V V+ = 2V, V- = -2V V+ = 2.7V, V- = -2.7V 5 25 35 15 45 55 65 -5 -3 -2-4 -1 0 1 2 3 4 5 ON-RESISTANCE vs. VCOM AND TEMPERATURE (DUAL SUPPLIES) M A X 4 5 6 5 T O C 0 3 VCOM (V) R O N ( Ω ) TA = -40°C TA = +85°C TA = 0°C TA = +25°C TA = +125°C 1000 10 0 21 5 6 7 8 943 10 ON RESISTANCE vs. VCOM (SINGLE SUPPLY) M A X 4 5 6 5 T O C 0 2 VCOM (V) R O N (Ω ) 100 V+ = 10V V+ = 5V V+ = 7.5V V+ = 3.3V V+ = 2.7V V+ = 2V V- = 0V 10 30 50 70 110 90 130 0 1.0 1.50.5 2.0 2.5 3.0 3.5 4.0 4.5 5.0 ON-RESISTANCE vs. VCOM AND TEMPERATURE (SINGLE SUPPLY) M A X 4 5 6 5 T O C 0 4 VCOM (V) R O N ( Ω ) TA = 0°C TA = +25°C TA = +125°C TA = -55°C TA = +85°C 0 50 100 150 200 250 ±2 ±3 ±4 ±5 ±6 ±8 ON/OFF TIME vs. SUPPLY VOLTAGE M A X 4 5 6 5 T O C 0 7 V+, V- (V) t O N , t O FF ( ns ) tON tOFF 0.0001 0.001 0.01 0.1 1 10 -75 -50 -25 0 25 7550 100 125 ON/OFF-LEAKAGE CURRENT vs. TEMPERATURE M A X 4 5 6 5 T O C 0 5 TEMPERATURE (°C) LE A K A G E (n A ) ON LEAKAGE OFF LEAKAGE -10 10 20 0 30 50 40 60 -5 -3 -2-4 -1 0 1 2 3 4 5 CHARGE INJECTION vs. VCOM M A X 4 5 6 5 T O C 0 6 VCOM (V) Q j ( pC ) DUAL SUPPLIES SINGLE SUPPLY 10 30 50 70 90 110 20 40 60 80 100 -75 -25 0 75 125-50 25 50 100 ON/OFF TIME vs. TEMPERATURE M A X 4 5 6 5 T O C 0 8 TEMPERATURE (°C) t O N , t O FF ( ns ) tON tOFF tON tOFF 0.00001 0.0001 0.001 I- I+ 0.01 0.1 1 -75 -25 0 75 125-50 25 50 100 POWER-SUPPLY CURRENT vs. TEMPERATURE M A X 4 5 6 5 T O C 0 9 TEMPERATURE (°C) I+ , I - (µ A )

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M A X 4 5 6 5 /M A X 4 5 6 6 /M A X 4 5 6 7 Quad/Dual, Low-Voltage, Bidirectional RF/Video Switches _______________________________________________________________________________________ 7 0 1.0 0.5 2.0 1.5 2.5 3.0 0 4 62 8 10 12 LOGIC-LEVEL THRESHOLD VOLTAGE vs. V+ SUPPLY VOLTAGE M A X 4 5 6 5 T O C 1 0 V+ (V) LO G IC -L EV EL T H R ES H O LD ( V ) 0 -120 1 10 1000100 MAX4565 FREQUENCY RESPONSE -100 -110 MAX14565 TOC11 FREQUENCY (MHz) S W IT C H L O S S ( dB ) -80 -90 -60 -50 -70 -40 -20 -10 -30 120 -120 -80 -100 O N P H A S E (D EG R EE S ) -40 -60 0 20 -20 40 80 100 60 ON LOSS OFF ISOLATION ADJACENT CHANNEL CROSSTALK OPPOSITE CHANNEL CROSSTALK ON PHASE 0 -120 -100 -110 0.1 1 10 100 1000 MAX4566 FREQUENCY RESPONSE -60 -70 -80 -90 -30 -40 -50 -20 -10 MAX4565 TOC12 FREQUENCY (MHz) LO S S ( dB ) 60 -60 -40 -50 0 -10 -20 -30 30 20 10 40 50 P H A S E (D EG R EE S ) INSERTION LOSS (ON) PHASE (ON) OFF ISOLATION ADJACENT CHANNEL CROSSTALK (ON) OPPOSITE CHANNEL CROSSTALK (ON) 0 -100 1 1000 MAX4567 FREQUENCY RESPONSE -90 -80 -70 -60 -50 -30 -20 -10 -40 100 -100 -80 -60 -40 -20 0 40 60 80 20 M A X 4 5 6 5 to c1 3 FREQUENCY (MHz) S W IT C H L O S S ( dB ) O N P H A S E (D EG R EE S ) 10 100 ON LOSS ON PHASE CROSSTALK OFF ISOLATION 100 0.01 10 1k 100k10k100 MAX4567 TOTAL HARMONIC DISTORTION vs. FREQUENCY M A X 1 4 5 6 5 T O C 1 4 FREQUENCY (Hz) TO TA L H A R M O N IC D IS TO R TI O N ( % ) 0.1 1 10 V+ = +5V V- = -5V SIGNAL = 5Vp-p 600Ω IN AND OUT ____________________________Typical Operating Characteristics (continued) (V+ = +5V, V- = -5V, TA = +25°C, GND = 0V, packages are surface mount, unless otherwise noted.)

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_______________Theory of Operation The MAX4565/MAX4566/MAX4567 are high-frequency “T” switches. Each “T” switch consists of two series CMOS switches, with a third N-channel switch at the junction that shunts capacitively-coupled signals to ground when the series switches are off. This produces superior high-frequency signal isolation when the switch is turned off. Logic-Level Translators The MAX4565/MAX4566/MAX4567 are constructed as high-frequency “T” switches, as shown in Figure 1. The logic-level input, IN_, is translated by amplifier A1 into a V+ to V- logic signal that drives amplifier A2. (Amplifier A2 is an inverter for normally closed switches.) Amplifier A2 drives the gates of N-channel MOSFETs N1 and N2 from V+ to V-, turning them fully on or off. The same signal drives inverter A3 (which drives the P-channel MOSFETs P1 and P2) from V+ to V-, turning them fully on or off, and drives the N-channel MOSFET N3 off and on. The logic-level threshold is determined by V+ and GND_. The voltage on GND_ is usually at ground potential, but it may be set to any voltage between (V+ - 2V) and V-. When the voltage between V+ and GND_ is less than 2V, the level translators become very slow and unreliable. Since individual switches in each package have individual GND_ pins, they may be set to different voltages. Normally, however, they should all be connected to the ground plane. Switch On Condition When the switch is on, MOSFETs N1, N2, P1, and P2 are on and MOSFET N3 is off. The signal path is COM_ to NO_, and because both N-channel and P-channel MOSFETs act as pure resistances, it is symmetrical (i.e., signals may pass in either direction). The off MOSFET, N3, has no DC conduction, but has a small M A X 4 5 6 5 /M A X 4 5 6 6 /M A X 4 5 6 7 Quad/Dual, Low-Voltage, Bidirectional RF/Video Switches 8 _______________________________________________________________________________________ ______________________________________________________________Pin Description NAME FUNCTION* MAX4565 1, 10, 11, 20 IN_ Digital Control Input PIN 3, 6, 8, 13, 15, 18 GND_ RF and Logic Ground. Grounds are not internally connected to each other, and should all be connected to a ground plane (see Grounding section). 16 V+ Positive Supply-Voltage Input (analog and digital) 2, 9, 12, 19 COM_ Analog Switch Common** Terminals — NC_ Analog Switch Normally Closed** Terminals 4, 7, 14, 17 NO_ Analog Switch Normally Open** Terminals 5 V- Negative Supply-Voltage Input. Connect to ground plane for single-supply operation. MAX4566 1, 16 3, 7, 10, 14 12 2, 8, 9, 15 6, 11 4, 13 5 MAX4567 1, 9 4, 6, 12, 14 7, 15 5, 13 8, 10 2, 16 3, 11 * All pins have ESD diodes to V- and V+. ** NO_ (or NC_) and COM_ pins are identical and interchangeable. Either may be considered as an input or output; signals pass equally well in either direction. A1 A2 A3 A2 (NC) S S P1 N3 D D D N1 V- GND_ IN_ V+ V+ V- COM_ NO_ S D N2 S S P2 D NORMALLY OPEN SWITCH CONSTRUCTION COM_ - NO_IN_ 0 1 OFF ON ESD DIODES ON GND_, IN_, COM_, NO_, AND NC_ Figure 1. T-Switch Construction

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amount of capacitance to GND_. The four on MOSFETs also have capacitance to ground that, together with the series resistance, forms a lowpass fil- ter. All of these capacitances are distributed evenly along the series resistance, so they act as a transmis- sion line rather than a simple R-C filter. This helps to explain the exceptional 350MHz bandwidth when the switches are on. Typical attenuation in 50Ω systems is -2.5dB and is reasonably flat up to 300MHz. Higher-impedance cir- cuits show even lower attenuation (and vice versa), but slightly lower bandwidth due to the increased effect of the internal and external capacitance and the switch’s internal resistance. The MAX4565/MAX4566/MAX4567 are optimized for ±5V operation. Using lower supply voltages or a single supply increases switching time, increases on-resis- tance (and therefore on-state attenuation), and increas- es nonlinearity. Switch Off Condition When the switch is off, MOSFETs N1, N2, P1, and P2 are off and MOSFET N3 is on. The signal path is through the off-capacitances of the series MOSFETs, but it is shunted to ground by N3. This forms a high- pass filter whose exact characteristics are dependent on the source and load impedances. In 50Ω systems, and below 10MHz, the attenuation can exceed 80dB. This value decreases with increasing frequency and increasing circuit impedances. External capacitance and board layout have a major role in determining over- all performance. __________Applications Information Power-Supply Considerations Overview The MAX4565/MAX4566/MAX4567 construction is typi- cal of most CMOS analog switches. It has three supply pins: V+, V-, and GND. V+ and V- are used to drive the internal CMOS switches and set the limits of the analog voltage on any switch. Reverse ESD protection diodes are internally connected between each analog signal pin and both V+ and V-. If the voltage on any pin exceeds V+ or V-, one of these diodes will conduct. During normal operation these reverse-biased ESD diodes leak, forming the only current drawn from V-. Virtually all the analog leakage current is through the ESD diodes. Although the ESD diodes on a given sig- nal pin are identical, and therefore fairly well balanced, they are reverse biased differently. Each is biased by either V+ or V- and the analog signal. This means their leakages vary as the signal varies. The difference in the two diode leakages from the signal path to the V+ and V- pins constitutes the analog signal-path leakage cur- rent. All analog leakage current flows to the supply ter- minals, not to the other switch terminal. This explains how both sides of a given switch can show leakage currents of either the same or opposite polarity. There is no connection between the analog signal paths and GND. The analog signal paths consist of an N-channel and P-channel MOSFET with their sources and drains paralleled and their gates driven out of phase with V+ and V- by the logic-level translators. V+ and GND power the internal logic and logic-level translators, and set the input logic thresholds. The logic-level translators convert the logic levels to switched V+ and V- signals to drive the gates of the analog switches. This drive signal is the only connec- tion between the logic supplies and the analog sup- plies. All pins have ESD protection to V+ and to V-. Increasing V- has no effect on the logic-level thresh- olds, but it does increase the drive to the P-channel switches, reducing their on-resistance. V- also sets the negative limit of the analog signal voltage. The logic-level thresholds are CMOS and TTL compati- ble when V+ is +5V. As V+ is raised, the threshold increases slightly; when V+ reaches +12V, the level threshold is about 3.1V, which is above the TTL output high-level minimum of 2.8V, but still compatible with CMOS outputs. Bipolar-Supply Operation The MAX4565/MAX4566/MAX4567 operate with bipolar supplies between ±2.7V and ±6V. The V+ and V- sup- plies need not be symmetrical, but their sum cannot exceed the absolute maximum rating of 13.0V. Do not connect the MAX4565/MAX4566/MAX4567 V+ pin to +3V and connect the logic-level input pins to TTL logic-level signals. TTL logic-level outputs can exceed the absolute maximum ratings, causing damage to the part and/or external circuits. CAUTION: The absolute maximum V+ to V- differential voltage is 13.0V. Typical “±6-Volt” or “12-Volt” supplies with ±10% tolerances can be as high as 13.2V. This voltage can damage the MAX4565/MAX4566/MAX4567. Even ±5% toler- ance supplies may have overshoot or noise spikes that exceed 13.0V. M A X 4 5 6 5 /M A X 4 5 6 6 /M A X 4 5 6 7 Quad/Dual, Low-Voltage, Bidirectional RF/Video Switches _______________________________________________________________________________________ 9

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