*EP = exposed pad TOP VIEW COM N.C. GND. Maxim Integrated Products 1

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1 9-984; Rev ; 5/ High-urrent, Ω, SPST, MOS General Description Maxim s are medium-voltage MOS analog switches with low on-resistance of Ω max, specifically designed to handle large switch currents. With a switch capability of up to 4mA peak current and 3mA continuous current (MAX4655/ MAX4656), and up to 3mA peak current and 5mA continuous current (MAX4657/), these parts can switch loads as low as 25Ω. They can replace reed relays with a million times the speed and virtually unlimited number of lifetime cycles. Normal power consumption is only 3mW, whether the switch is on or off. These parts are TTL/MOS compatible and will switch any voltage within its power-supply range. These are SPST (single-pole/single-throw) switches. The MAX4655/MAX4657 are normally closed (N), while the MAX4656/ are normally open (NO). The difference between the MAX4655/MAX4656 and the MAX4657/ is in the power dissipation of their packages. Refer to the Absolute Maximum Ratings and the Electrical haracteristics. The power-supply range is from ±4.5V to ±2V for dual supply operation and +9V to +4V for single supply operation. These switches can operate from any combination of supplies, within a 4V to range. They conduct equally well in either direction and can handle Rail-to-Rail analog signals. The off-leakage current is only na max at T A = +25. They are available in 8-pin µmax and SO packages, with exposed pad options for high-power applications. Relay Replacement Test Equipment ommunication Systems xdsl Modems PBX, PABX Systems Audio Signal Routing Audio Systems P Multimedia Boards Redundant/Backup Systems Applications Features High ontinuous urrent Handling 3mA (MAX4655/MAX4656) 5mA (MAX4657/) High Peak urrent Handling 4mA (MAX4655/MAX4656) 3mA (MAX4657/) Ω max On-Resistance (±5V supplies) V L not Required Ω max R ON Flatness over Specified Signal Range Rail-to-Rail Signal Handling +2V Single Supply or ±5V Dual Supply Operation Pin ompatible with DG47, DG48 TOP VIEW µmax/so MAX4655/MAX4657 LOGI SWITH ON Ordering Information PART TEMP. RANGE P-PAKAGE MAX4655EUA -4 to µmax-ep* MAX4655ESA -4 to SO-EP* MAX4656EUA -4 to µmax-ep* MAX4656ESA -4 to SO-EP* MAX4657EUA -4 to µmax MAX4657ESA -4 to SO EUA -4 to µmax ESA -4 to SO *EP = exposed pad Pin onfigurations/ Functional Diagrams/Truth Tables N N N N.. 4 MAX4655/MAX4657 MAX4656/ µmax/so MAX4656/ LOGI SWITH ON NO N.. Rail-to-Rail is a registered trademark of Nippon Motorola, Inc. SWITHES SHOWN FOR LOGI "" PUT N.. = NO ONNET N = NORMALLY LOSED Maxim Integrated Products For pricing, delivery, and ordering information, please contact Maxim/Dallas Direct! at , or visit Maxim s website at

2 High-urrent, Ω, SPST, MOS ABSOLUTE MAXIMUM RATGS to...-.3v to +44V to...-44v to +.3V to...-.3v to +44V All Other Pins to (Note ) V to +.3V ontinuous urrent,, NO, N (MAX4655/MAX4656)...±3mA ontinuous urrent,, NO, N (MAX4657/)...±5mA ontinuous urrent,...±3ma Peak urrent,, NO, N (pulsed at ms, % duty cycle) MAX4655/MAX ±4mA (pulsed at ms, % duty cycle) MAX4657/...±3mA ontinuous Power Dissipation (T A = +7 ) 8-Pin µmax-ep (derate.3mw/ above +7 ) MAX4655/MAX mW 8-Pin µmax (derate 4.5mW/ above +7 ) MAX4657/...362mW 8-Pin SO-EP (derate 8.9mW/ above +7 ) MAX4655/MAX mW 8-Pin SO (derate 5.88mW/ above +7 ) MAX4657/...47mW Operating Temperature Ranges...-4 to +85 Junction Temperature...+5 Storage Temperature Range to +5 Lead Temperature (soldering, s)...+3 Note : Signals on N, NO,, or exceeding or will be 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. ELETRIAL HARATERISTIS Dual Supplies ( = +5V, = -5V, V IH = 2.4V, V IL =.8V, T A = T M to T MAX, unless otherwise noted. Typical values are at T A = +25.) (Notes 2, 7) PARAMETER SYMBOL ONDITIONS T A M TYP MAX UNITS ANALOG SWITH V Analog Signal Range NO, V N, V V I On-Resistance R = ma; ON Ω V NO or V N = ±V T M to T MAX 5 On-Resistance Flatness (Note 3) NO or N Off-Leakage urrent (Note 4) Off-Leakage urrent (Note 4) On-Leakage urrent (Note 4) DYNAMI HARATERISTIS R FLAT (ON ) I NO() or I N() I () I (ON) I = ma; V NO or V N = -5V,, +5V T M to T MAX.5 V = +4.5V, -4.5V; V NO or V N = -4.5V, +4.5V T M to T MAX - V = +4.5V, -4.5V; V NO or V N = -4.5V, +4.5V T M to T MAX - V = +4.5V, -4.5V; V NO or V N = +4.5V, -4.5V, or floating T M to T MAX -2 2 na Ω na na Turn-On Time t ON R L = 5Ω; MAX4655/4656, R L = Ω; MAX4657/4658, V NO or V N = V; L = 35pF; Figure 3 T M to T MAX 3 Turn-Off Time t R L = 5Ω; MAX4655/4656, R L = Ω; MAX4657/4658, V NO or V N = V; L = 35pF; Figure 3 T M to T MAX 5 ns ns 2

3 High-urrent, Ω, SPST, MOS ELETRIAL HARATERISTIS Dual Supplies (continued) ( = +5V, = -5V, V IH = 2.4V, V IL =.8V, T A = T M to T MAX, unless otherwise noted. Typical values are at T A = +25.) (Notes 2, 7) PARAMETER SYMBOL ONDITIONS T A M TYP MAX UNITS harge Injection Q V GEN = ; R GEN = ; L = nf; Figure p -3dB Bandwidth BW MHz Off-Isolation (Note 5) V ISO f = MHz; R L = 5Ω; Figure 5 Total Harmonic Distortion NO or N Off-apacitance THD f = 2H z to 2kH z, V N_ = 5V p-p ; R L = 6Ω % NO(), N() f = MHz; Figure pf Off-apacitance () f = MHz; Figure pf On-apacitance (ON) f = MHz; Figure pf DIGITAL I/O Input Logic High V IH T M to T MAX 2.4 V Input Logic Low V IL T M to T MAX.8 V Input Leakage urrent I V =.8V or 2.4V T M to T MAX - µa POWER SUPPLY Power-Supply Range T M to T MAX ±4.5 ±2 V db Positive Supply urrent I+ V = or 5V, V N_ = 3V; I SWITH = 2mA, MAX4655/4656; I SWITH = ma, MAX4657/4658 T M to T MAX 3 µa Negative Supply urrent I- V = or 5V, V N_ = 3V; I SWITH = 2mA, MAX4655/4656; I SWITH = ma, MAX4657/4658 T M to T MAX µa Ground urrent I V = or 5V, V N_ = 3V; I SWITH = 2mA, MAX4655/4656; I SWITH = ma, MAX4657/4658 T M to T MAX 26 µa 3

4 High-urrent, Ω, SPST, MOS ELETRIAL HARATERISTIS Single Supply ( = +2V, =, V IH = 2.4V, V IL =.8V, T A = T M to T MAX, unless otherwise noted. Typical values are at T A = +25.) (Note 2) PARAMETER SYMBOL ONDITIONS T A M TYP MAX UNITS ANALOG SWITH Analog Signal Range V T M to T MAX V I On-Resistance R = 5mA, ON V NO or V N = V T M to T MAX 33 On-Resistance Flatness (Note 3) DYNAMI HARATERISTIS R FLAT (ON) I = 5mA, V N O or V N = 2V, 6V, V T M to T MAX 5 Turn-On Time t ON R L = Ω MAX4655/4656, R L = 2Ω MAX4657/4658, V NO or V N = V; L = 35pF; Figure 3 T M to T MAX 3 V NO or V N = V; R L = Ω MAX4655/4656, Turn-Off Time t R L = 2Ω MAX4657/4658, L = 35pF; Figure 3 T M to T MAX 2 Ω Ω ns ns harge Injection POWER SUPPLY Q V GEN = ; R GEN = ; L = nf; Figure p Power-Supply Range 9 4 V Positive Supply urrent (Note 6) I+ V = or 2V, I SWITH = ma, MAX4655/4656; I SWITH = 5mA, MAX4657/ T M to T MAX 25 2 V = or 5V, I SWITH = ma, MAX4655/4656; I SWITH = 5mA, MAX4657/4658 T M to T MAX 2 µa Note 2: The algebraic convention is used in this data sheet; the most negative value is shown in the minimum column. Note 3: Flatness is defined as the difference between the maximum and minimum value of on-resistance as measured over the specified analog signal range. Note 4: Leakage parameters are % tested at maximum rated hot temperature and guaranteed by correlation at T A = +25. Note 5: Off-isolation = 2log [V / (V N or V NO )], V = output, V N or V NO = input to off switch. Note 6: Guaranteed by testing with dual supplies. Note 7: -4 specifications are quaranteed by design. 4

5 High-urrent, Ω, SPST, MOS (T A = +25, unless otherwise noted.) RON (Ω) E ON-RESISTANE vs. V (DUAL SUPPLIES) B -2-2 V (V) A D A: = +4.5V, = -4.5V D: = +5V, = -5V B: = +V, = -V E: = +2V, = -2V : = +2V, = -2V MAX4655/58 toc RON (Ω) A B ON-RESISTANE vs. V (SGLE SUPPLY) E V (V) Typical Operating haracteristics A: = +9V, = B: = +2V, = : = +24V, = D: = +36V, = E: = +4V, = D MAX4655/58 toc2 RON (Ω) 5 5 ON-RESISTANE vs. V AND TEMPERATURE (DUAL SUPPLIES) T A = +85 T A = +25 T A = V (V) MAX4655/58 toc ON-RESISTANE vs. V AND TEMPERATURE (SGLE SUPPLY) T A = +85 MAX4655/58 toc4, = +5V, = -5V LEAKAGE URRENT vs. TEMPERATURE I (N) MAX4655/58 toc5 9 6 HARGE JETION vs. V A: = +5V, = -5V B: = +2V, = V MAX4655/58 toc6 RON (Ω) 5 T A = +25 T A = -4 -LEAKAGE (pa) I (FF) Q (p) 3 A B V (V) TEMPERATURE ( ) V (V) SUPPLY URRENT (µa) SUPPLY URRENT vs. SUPPLY VOLTAGE (SGLE SUPPLY) = MAX4655/58 toc7 SUPPLY URRENT (µa) SUPPLY URRENT vs. SUPPLY VOLTAGE AND TEMPERATURE A: I+, T A = -4 B: I+, T A = +25 : I+, T A = +85 D: I-, T A = -4 E: I-, T A = +25 F: I-, T A = +85 DUAL SUPPLIES: ±5V, V = 3V, I SWITH = ma E F D A B MAX4657/58 toc8 TOTAL HARMONI DISTORTION (%).. TOTAL HARMONI DISTORTION vs. FREQUENY = +5V = -5V 5V RMS SIGNAL 6Ω SOURE MAX4655/58 toc SUPPLY VOLTAGE (V) ±5 ± ±5 SUPPLY VOLTAGE (V). k k k FREQUENY (Hz) 5

6 High-urrent, Ω, SPST, MOS (T A = +25, unless otherwise noted.) LOSS (db) ON-RESPONSE, -ISOLATION vs. FREQUENY ON-RESPONSE -ISOLATION BW = 2MHz = +5V, = -5V.. FREQUENY (MHz) MAX4655/58 toc VTH (V) Typical Operating haracteristics (continued) LOGI LEVEL THRESHOLD VOLTAGE vs. SUPPLY VOLTAGE (V) MAX4655/58 toc ton/t (ns) TURN-ON/TURN- TIME vs. SUPPLY VOLTAGE (DUAL SUPPLIES) t ON t R L = 3Ω L = 35pF , (V) MAX4655/58 toc2 2 6 = +5V = -5V R L = 3Ω L = 35pF TURN-ON/TURN- TIME vs. TEMPERATURE MAX4655/58 toc SUPPLY URRENT vs. VOLTAGE AROSS SWITH = +5V, = -5V MAX4655/58 toc4 ton/t (ns) t ON t I+ (µa) TEMPERATURE ( ) V - V N_ (mv) Pin Description MAX4655/ MAX4657 P MAX4656/ NAME Analog Switch ommon 2, 5 2, 5 N.. No Internal onnection 3 3 Ground 4 4 Positive Supply Voltage Input 6 6 Digital ontrol Input 7 7 Negative Supply Voltage Input 8 NO Analog Switch Normally Open 8 N Analog Switch Normally losed FUNTION 6

7 High-urrent, Ω, SPST, MOS Detailed Description The are single SPST MOS analog switches. The MOS switch construction provides rail-to-rail signal handling while consuming very little power. The switch is controlled by a TTL/MOS level compatible digital input. The MAX4655/MAX4657 are normally closed switches, and the MAX4656/ are normally open switches. These devices can be operated with either single power supplies or dual power supplies. Operation at up to ±2V supplies allows users a wide switching dynamic range. Additionally, asymmetrical operation is possible to tailor performance to a particular application. These switches have been specifically designed to handle high switch currents, up to 4mA peak current and 3mA continuous currents. In order to do this, a new technique is used to drive the body of the output N-channel device. (Note: the basic switch between the input N/NO terminal, and the output common terminal consists of an N-channel MOSFET and a P-channel MOSFET in parallel.) The standard method limits operation to approximately a 6mV drop across the switch. More than 6mV causes an increase in Id ON leakage current (due to the turn-on of on-chip parasitic diodes) and an increase in supply current. With the new sensing method, there is no limitation to the voltage drop across the switch. urrent and voltage are limited only by the power dissipation rating of the package and the absolute maximum ratings of the switch. When the analog input to output voltage drop is approximately 7mV there is an increase in power supply current from typically 9µA to 2mA within a mv to 7mV range, caused by the new sensing/driving circuitry. Applications Information Overvoltage Protection Proper power-supply sequencing is recommended for all MOS devices. Do not exceed the absolute maximum ratings, because stresses beyond the listed ratings can cause permanent damage to the devices. First, connect, followed by,, and the remaining pins. If power-supply sequencing is not possible, add two small signal diodes (D, D2) in series with supply pins (Figure ). Adding diodes reduces the analog signal range to one diode drop below and one diode drop above, but does not affect the devices low switch resistance and low leakage characteristics. Device operation is unchanged, and the difference between and should not exceed 44V. The protection diode for the negative supply is not required when is connected to. Off-Isolation at High Frequencies In 5Ω systems, the high-frequency on-response of these parts extends from D to above MHz, with a typical loss of -2dB. When the switch is turned off, however, it behaves like a capacitor, and off-isolation decreases with increasing frequency. This effect is more pronounced with higher source and load impedances. Above 5MHz, circuit board layout becomes critical. The graphs shown in the Typical Operating haracteristics were taken using a 5Ω source and load connected with BN connectors. NO V g Figure. Overvoltage Protection Using Blocking Diodes 7

8 High-urrent, Ω, SPST, MOS Figure 2. Block Diagram N OR NO TTL/MOS LEVEL SHIFTER NO OR N Test ircuits/timing Diagrams SENSOR LOGI PUT +3V 5% t R < 2ns t F < 2ns SWITH PUT +5V N OR NO MAX4655 SWITH OUTPUT V O SWITH PUT SWITH OUTPUT V V O t ON t.9v.9v LOGI PUT -5V R L L 35pF LOGI PUT WAVEFORMS VERTED FOR SWITHES THAT HAVE THE OPPOSITE LOGI SENSE. L LUDES FIXTURE AND STRAY APAITANE. RL V O = V ( RL + RON ) Figure 3. Switching Time V O ON V O V GEN +5V N OR NO MAX4655 L nf V O ON Q = ( V O )( L ) DEPENDS ON SWITH ONFIGURATION; PUT POLARITY DETERMED BY SENSE OF SWITH. -5V V = +3V Figure 4. harge Injection 8

9 High-urrent, Ω, SPST, MOS SIGNAL GENERATOR dbm ANALYZER R L Figure 5. Off-Isolation +5V N OR NO -5V MAX4655 Test ircuits/timing Diagrams (continued) V, 2.4V APAITANE METER f = MHz +5V N OR NO Figure 7. hannel On-apacitance -5V MAX4655 V +5V MAX4655 TRANSISTOR OUNT: 45 PROESS TEHNOLOGY: MOS hip Information APAITANE METER f = MHz N OR NO 2.4V -5V Figure 6. hannel Off-apacitance 9

10 High-urrent, Ω, SPST, MOS Package Information 8LUMAXD.EPS

11 High-urrent, Ω, SPST, MOS Package Information (continued) SOIN.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, 2 San Gabriel Drive, Sunnyvale, A Maxim Integrated Products Printed USA is a registered trademark of Maxim Integrated Products.