PART MAX4631ESE MAX4633CPE MAX4632EPE MAX4633MJE MAX4632CSE MAX4632CPE MAX4632ESE MAX4632MJE MAX4633CSE MAX4633ESE MAX4633EPE

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1 ; Rev ; 7/99 Fault-Protected, High-oltage, General Description The high-voltage, dual analog switches are pin compatible with the industry-standard DG41/DG43/DG45. They upgrade the existing devices with fault-protected inputs and Rail-to-Rail signal handling capabilities. The s normally open (NO) and normally closed (NC) terminals are protected from overvoltage faults up to 36 during power-up or power-down. During a fault condition, these terminals become open circuit and only nanoamperes of leakage current flow from the source, yet the switch output () continues to furnish up to 18mA of the appropriate polarity supply voltage to the load. This ensures unambiguous rail-to-rail outputs when a fault begins and ends. On-resistance is 85Ω (max) at and is matched between switches to 6Ω (max). Off-leakage current is only.5 at and 5 at +85 C. The MAX4631 has two NO single-pole/single-throw (SPST) switches. The MAX4632 has two NO/NC single-pole/ double-throw (SPDT) switches. The has two NO double-pole/single-throw (DPST) switches. These CMOS switches operate with dual power supplies ranging from ±4.5 to ±18 or a single supply between +9 and +36. All digital inputs have +.8 and +2.4 logic thresholds, ensuring both TTL- and CMOS-logic compatibility when using ±15 or a single +12 supply. Applications ATE Equipment Data Acquisition Industrial and Process Control Systems Avionics Redundant/Backup Systems Pin Configurations appear at end of data sheet. Features Fault Protection ±4 with Power Off ±36 with ±15 Supplies (MAX4631/) ±25 with ±15 Supplies (MAX4632) Rail-to-Rail Signal Handling No Power-Supply Sequencing Required All Switches Off with Power Off Output Clamped to Appropriate Supply oltage During Fault Condition; No Transition Glitch 85Ω (max) Signal Paths with ±15 Supplies ±4.5 to ±18 Dual Supplies +9 to +36 Single Supply Low Power Consumption: <6mW Pin Compatible with Industry-Standard DG41/DG43/DG45 TTL- and CMOS-Logic Compatible Inputs with Single +9 to +15, or ±15 Supplies PART MAX4631CSE MAX4631CPE MAX4631ESE MAX4631EPE MAX4631MJE MAX4632CSE MAX4632CPE MAX4632ESE MAX4632EPE MAX4632MJE CSE CPE ESE EPE MJE Ordering Information TEMP. RANGE C to +7 C C to +7 C -4 C to +85 C -4 C to +85 C -55 C to +125 C C to +7 C -4 C to +85 C -4 C to +85 C PIN-PACKAGE 16 Narrow SO 16 Plastic DIP 16 Narrow SO 16 Plastic DIP 16 CERDIP 16 Narrow SO C to +7 C 16 Plastic DIP -55 C to +125 C C to +7 C C to +7 C -4 C to +85 C -4 C to +85 C -55 C to +125 C 16 Narrow SO 16 Plastic DIP 16 CERDIP 16 Narrow SO 16 Plastic DIP 16 Narrow SO 16 Plastic DIP 16 CERDIP Rail-to-Rail is a registered trademark of Nippon Motorola, Ltd. Maxim Integrated Products 1 For free samples & the latest literature: or phone For small orders, phone

2 ABSOLUTE MAXIMUM RATINGS (oltages referenced to GND) to to +.3 to to +44, IN_ (Note 1)...( -.3) to ( +.3) NC_, NO_ (Note 2) MAX4631 E...( - 36) to ( + 36) MAX4632 E...( - 25) to ( + 25) E...( - 36) to ( + 36) NC_, NO_ to MAX4631 E to +36 MAX4632 E to +25 E to +36 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 Dual Supplies Continuous Current into Any Terminal...±3mA Peak Current into Any Terminal (pulsed at 1ms, 1% duty cycle)...±5ma Continuous Power Dissipation (T A = +7 C) (Note 2) Plastic DIP (derate 1.53mW/ C above +7 C)...842mW Narrow SO (derate 8.7mW/ C above +7 C)...696mW CERDIP (derate 1.mW/ C above +7 C)...842mW Operating Temperature Ranges MAX463_C_E... C to +7 C MAX463_E_E...-4 C to +85 C MAX463_M_E C to +125 C Storage Temperature Range C to +15 C Lead Temperature (soldering, 1sec)...+3 C Note 1: and IN_ pins are not fault protected. Signals on to IN_ exceeding or are clamped by internal diodes. Limit forward diode current to maximum current rating. Note 2: NC_ and NO_ pins are fault protected (see Electrical Characteristics). With power applied to or, signals on NC_ or NO_ exceeding ±25 (MAX4632) or ±36 (MAX4631/) may damage the device. With = =, signals on NC_ or NO_ exceeding ±4 may damage the device. ( = +15, = -15, INL_ =.8, INH_ = 2.4, T A = T MIN to T MAX, unless otherwise noted. Typical values are at T A =.) (Note 3) PARAMETER SYMBOL CONDITIONS T A MIN TYP MAX UNITS ANALOG SWITCH Fault-Free Analog Signal Range (Note 2) NO_, NC_ C, E, M to NO_ or NC_ On-Resistance to NO_ or NC_ On-Resistance Match Between Channels (Note 4) NO_, NC_, Off-Leakage Current (Note 5) On-Leakage Current (Note 5) FAULT PROTECTION Fault-Protected Analog Signal Range (Note 2) R = ±1, ON C, E 1 I = 1mA M R = ±1, ON C, E 1 I = 1mA M 15 I NO_ (OFF), I NC_ (OFF), = ±14, C, E -5 5 I NO_ or NC_ = +14 (OFF) M -1 1 = ±14, I (ON) NO_ or NC_ = ±14 C, E -2 2 or floating M -1 1 NO_, NC_ Applies with power on MAX4631/ MAX4632 Applies with power off C, E, M C, E, M C, E, M -4 4 Ω Ω 2

3 ELECTRICAL CHARACTERISTICS Dual Supplies (continued) ( = +15, = -15, INL_ =.8, INH_ = 2.4, T A = T MIN to T MAX, unless otherwise noted. Typical values are at T A =.) (Note 3) IN_ Input Logic oltage Low INL_ PARAMETER SYMBOL CONDITIONS T A MIN TYP MAX UNITS Output Leakage Current, NO_ or NC_ = ±25, -1 1 I C, E -2 2 Supplies On no connection to on channel (MAX4632 only) M NO_ or NC_ Input Leakage I C, E -2 2 Current, Supplies On NO_, I NO_ or NC_ = ±25, NC_ = ±1 M NO_ or NC_ Input Leakage I C, E -2 2 Current, Supplies Off NO_, I NC_ NO_ or NC_ = ±4, M -1 1 Output Clamp Current, NO_ or NC_ = I Supplies On NO_ or NC_ = ma Output Clamp Resistance, Supplies On R NO_ or NC_ = ± kω LOGIC INPUT IN_ Input Logic oltage High INH_ C, E, M 2.4 C, E, M.8 IN_ Input Current Logic I High or Low INH_, I INL_ IN_ =.8 or 2.4 C, E, M -5 5 SWITCH DYNAMIC CHARACTERISTICS Turn-On Time t ON 1 15 = ±1, R L = 1kΩ, C, E, 5 Figure 2 M 6 ns Turn-Off Time t OFF 5 1 = ±1, R L = 1kΩ, C, E, 4 Figure 2 M 5 ns Break-Before-Make Time Delay (MAX4632 only) Charge Injection (Note 6) NO_, NC_ Off- Capacitance Off-Capacitance On-Capacitance t BBM Q C NC_(OFF), C NO_(OFF) C (OFF) C (ON) = ±1, R L = 1kΩ, Figure 3 C L = 1pF, Figure 4, NO_ = NC_ = GND, R S = NO_ = NC_ = GND, f = 1MHz, Figure 5 = GND, f = 1MHz, Figure 5 = NO_ = NC_ = GND, f = 1MHz, Figure C, E, M 18 C, E, M 18 C, E, M 22 ns pc pf pf pf 3

4 ELECTRICAL CHARACTERISTICS Dual Supplies (continued) ( = +15, = -15, INL_ =.8, INH_ = 2.4, T A = T MIN to T MAX, unless otherwise noted. Typical values are at T A =.) (Note 3) Off-Isolation (Note 7) PARAMETER SYMBOL CONDITIONS T A MIN TYP MAX UNITS Channel-to-Channel Crosstalk (Note 8) POWER SUPPLY Power-Supply Range, Supply Current I+ Supply Current I- GND Supply Current ANALOG SWITCH Fault-Free Analog Signal Range (Note 2) R L = 5Ω, C L = 15pF, ISO NO_ = NC_ = 1 RMS, C, E, M -62 f = 1MHz, Figure 6 R L = 5Ω, C L = 15pF, CT NO_ = NC_ = 1 RMS, C, E, M -66 f = 1MHz, Figure 7 I GND All IN_ = or 5, NO_ or NC_ = All IN_ = or 5, NO_ or NC_ = All IN_ = or 15, NO_ or NC_ = All IN_ = 5, NO_ or NC_ = ELECTRICAL CHARACTERISTICS Single Supply C, E, M ±4.5 ± C, E, M C, E, M C, E, M C, E, M 3 ( = +15, = -15, INL_ =.8, INH_ = 2.4, T A = T MIN to T MAX, unless otherwise noted. Typical values are at T A =.) (Note 3) PARAMETER SYMBOL CONDITIONS T A MIN TYP MAX UNITS to NO_ or NC_ On-Resistance to NO_ or NC_ On-Resistance Match Between Channels (Note 4) NO_, NC_, Off-Leakage Current (Notes 5, 9) On-Leakage Current (Notes 5, 9) FAULT PROTECTION Fault-Protected Analog Signal Range (Note 2) NO_, NC_ C, E, M R = 1, ON C, E 25 I = 1mA M R = 1, ON C, E 2 I = 1mA M I NO_ (OFF), = 1, C, E -1 1 I NC_ (OFF) NO_ or NC_ = 12 M I = 1, (ON) C, E -2 2 NO_ or NC_ = 1 or 12 M -4 4 NO_, NC_ MAX4631/ Applies with power on MAX4632 Applies with power off C, E, M C, E, M C, E, M -4 4 db db Ω Ω 4

5 ELECTRICAL CHARACTERISTICS Single Supply (continued) ( = +15, = -15, INL_ =.8, INH_ = 2.4, T A = T MIN to T MAX, unless otherwise noted. Typical values are at T A =.) (Note 3) PARAMETER SYMBOL CONDITIONS T A MIN TYP MAX UNITS Output Leakage Current, Supplies On NO_ or NC_ Input Leakage Current, Supplies On NO_ or NC_ Input Leakage Current, Supplies Off Output Clamp Current, Supplies On I I NO_, I NC_ NO_ or NC_ = ±25, no connection to on channel (MAX4632 only) NO_ or NC_ = ±25, = ±1 C, E -1 1 M -1 1 C, E -1 1 M -1 1 C, E M -1 1 I NO_ or NC_ = IN_ Input Logic oltage High INH_ Output Clamp Resistance, Supplies On R NO_ or NC_ = kω LOGIC INPUT C, E, M 2.4 IN_ Input Logic oltage Low INL_ C, E, M.8 IN_ Input Current Logic I High or Low INH_, I INL_ IN_ =.8 or 2.4 IN_.8 or 2.4 C, E, M -5 5 SWITCH DYNAMIC CHARACTERISTICS Turn-On Time t ON = ±1, R L = 2kΩ, C, E, 3 Figure 2 M 5 ns Turn-Off Time t OFF 1 2 = ±1, R L = 2kΩ, C, E, 25 Figure 2 M 4 ns Break-Before-Make Time Delay (MAX4632 only) Charge Injection (Note 6) NO_, NC_ Off-Capacitance Off-Capacitance On-Capacitance I NO_, I NC_ NO_ or NC_ = ±4 t BBM Q C NC_(OFF), C NO_(OFF) C (OFF) C (ON) = ±1, R L = 2kΩ, Figure 3 C L = 1pF, Figure 4, NO_ = NC_ = GND, R S = NO_ = NC_ = GND, f = 1MHz, Figure 5 = GND, f = 1MHz, Figure 5 = NO_ = NC_ = GND, f = 1MHz, Figure C, E, M 2 C, E, M 2 C, E, M 25 ma ns pc pf pf pf Off-Isolation (Note 7) ISO R L = 5Ω, C L = 15pF, NO_ = NC_ = 1 RMS, f = 1MHz, Figure 6 C, E, M -62 db Channel-to-Channel Crosstalk (Note 8) CT R L = 5Ω, C L = 15pF, NO_ = NC_ = 1 RMS, f = 1MHz, Figure 7 C, E, M -65 db 5

6 ELECTRICAL CHARACTERISTICS Single Supply (continued) ( = +15, = -15, INL_ =.8, INH_ = 2.4, T A = T MIN to T MAX, unless otherwise noted. Typical values are at T A =.) (Note 3) PARAMETER SYMBOL CONDITIONS T A MIN TYP MAX UNITS POWER SUPPLY Power-Supply Range, (T A =, unless otherwise noted.) C, E, M 36 Supply Current I+ All IN_ = or 5, NO_ or NC_ = C, E, M 4 GND Supply Current I GND All IN_ = or 5, NO_ or NC_ = C, E, M 4 Note 2: NC_ and NO_ pins are fault protected (see Electrical Characteristics). With power applied to or, signals on NC_ or NO_ exceeding ±25 (MAX4632) or ±36 (MAX4631/) may damage the device. With = =, signals on NC_ or NO_ exceeding ±4 may damage the device. Note 3: The algebraic convention is used in this data sheet; the most negative value is shown in the minimum column. Note 4: R ON = R ON(MAX) - R ON(MIN). Note 5: Leakage parameters are 1% tested at maximum rated hot temperature and guaranteed by correlation at. Note 6: Guaranteed by design. Note 7: Off-isolation = 2log 1 [ / ( NC_ or NO_ )], = output, NC_ or NO_ = input to off switch. Note 8: Between any two switches. Note 9: Leakage testing for single-supply operation is guaranteed by testing with dual supplies. Typical Operating Characteristics ON-RESISTANCE (Ω) SWITCH ON-RESISTANCE vs. COM (DUAL SUPPLIES) = +5 = -5 = +1 = -1 = +15 = COM () = +2 = -2 = +12 = -12 MAX toc1 ON-RESISTANCE (Ω) ON-RESISTANCE vs. COM AND TEMPERATURE (DUAL SUPPLIES) T A = = 15 = -15 T A = +85 C T A = -4 C COM () T A = +125 C T A = -55 C MAX toc2 ON-RESISTANCE (Ω) SWITCH ON-RESISTANCE vs. COM (SINGLE SUPPLY) = +5 = GND = +8 = +12 = +15 = +2 = +24 = COM () MAX toc3 6

7 (T A =, unless otherwise noted.) ON-RESISTANCE (Ω) SUPPLY CURRENT () ON-RESISTANCE vs. COM AND TEMPERATURE (SINGLE SUPPLY) = +12 T A = -4 C T A = T A = +85 C COM () T A = +125 C SUPPLY CURRENT vs. IN I+ T A = -55 C IN () I GND I- = +15 = -15 MAX toc4 MAX toc7 LOGIC-LEEL THRESHOLD () I+ () Typical Operating Characteristics (continued) LOGIC-LEEL THRESHOLD vs. SINGLE OR DUAL SUPPLY () I+ vs. IN DUAL SUPPLIES = +15 = -15 SINGLE SUPPLY = +12 = GND IN () MAX toc5 MAX toc8 SUPPLY CURRENT () LOSS (db) SUPPLY CURRENT vs. TEMPERATURE DUAL SUPPLIES = +15 = -15 SINGLE SUPPLY = +12 = GND TEMPERATURE ( C) FREQUENCY RESPONSE 12-1 ON-LOSS ON-PHASE OFF-LOSS FREQUENCY (MHz) MAX toc6 MAX toc9 PHASE (DEGREES) CHARGE INJECTION (pc) CHARGE INJECTION vs. COM DUAL SUPPLIES = +15 = COM () SINGLE SUPPLY = +12 MAX toc1 TIME (ns) ON/OFF TIME vs. SINGLE-SUPPLY OLTAGE NO_ t OFF NC_ t OFF NO_ t ON NC_ ton SUPPLY OLTAGE () MAX toc11 TIME (ns) ON/OFF TIME vs. DUAL-SUPPLY OLTAGE NO_ t OFF NC_ t OFF NO_ t ON NC_ t ON SUPPLY OLTAGE () MAX toc12 7

8 (T A =, unless otherwise noted.) INPUT OEROLTAGE () LEAKAGE CURRENT () NO COM LEAKAGE CURRENT vs. TEMPERATURE I NO (OFF) AT NO = -14, COM = +14 I NO (OFF) AT NO = +14, COM = -14 I COM (ON) AT COM = -14 I COM (OFF) AT NO = +14, COM = -14 I COM (ON) AT COM = TEMPERATURE ( C) I COM (OFF) AT NO = -14, COM = +14 INPUT OEROLTAGE vs. OUTPUT CLAMPING (±15 SUPPLIES) Typical Operating Characteristics (continued) MAX toc13 MAX toc15 INPUT OEROLTAGE () TIME (ns) COM NO ON/OFF TIME vs. TEMPERATURE t ON t OFF TEMPERATURE ( C) FAULT-FREE SIGNAL (±15 SUPPLIES) MAX toc14 MAX toc PIN OUTPUT CLAMPING (2µs/div) MAX4631 MAX4632 NAME FUNCTION 1, 8 1, 8 1, 8 COM1, COM2 Analog Switch Common Terminals 16, 9 16, 9 16, 9 NO1, NO2 Analog Switch Normally Open Terminals 15, 1 15, 1 15, 1 IN1, IN2 Logic-Control Digital Inputs 2 7, 12 2, 7, 12 2, 7, 12 N.C. No Connection. Not internally connected. 3, 6 3, 6 COM3, COM4 Analog Switch Common Terminals 4, 5 NC3, NC4 Analog Switch Normally Closed Terminals 4, 5 NO3, NO4 Analog Switch Normally Open Terminals Positive Supply Input GND Ground Negative Supply Input OUTPUT CLAMPING (2µs/div) 8 Pin Description

9 NC_ or NO_ INPUT N3 SENSE SWITCH P3 SENSE SWITCH COMPARATOR N-CHANNEL DRIER P-CHANNEL DRIER COMPARATOR Figure 1. Simplified Internal Structure Detailed Description The are fault-protected analog switches with special operation and construction. Traditional fault-protected switches are constructed using three series CMOS devices. This combination produces good fault-protection but fairly high on-resistance when the signals are within 3 of each supply rail. These series devices are not capable of handling signals up to the power-supply rails. These devices differ considerably from traditional faultprotection switches, with three advantages. First, they are constructed with two parallel FETs, allowing very low on-resistance when the switch is on. Second, they allow signals on the NC_ or NO_ pins that are within or slightly beyond the supply rails to be passed through the switch to the terminal, allowing rail-to-rail signal operation. Third, when a signal on NC_ or NO_ exceeds the supply rails by about 5m (a fault condition), the voltage on is limited to the appropriate polarity supply voltage. Operation is identical for both fault polarities. The fault-protection extends to ±25 (MAX4632) or ±36 (MAX4631/) with power on and ±4 with power off. The have a parallel N- channel and P-channel MOSFET switch configuration with N1 P1 - (-15) CLAMP N2 CLAMP P2 + (+15) OUTPUT input voltage sensors. The simplified structure is shown in Figure 1. The parallel N1 and P1 MOSFETs form the switch element. N3 and P3 are sensor elements to sample the input voltage and compare it against the powersupply rails. During normal operation of a conducting channel, N1 and P1 remain on with a typical 62Ω on-resistance between NO_ (or NC_) and. If the input voltage exceeds either supply rail by about 5m, the parallel combination switches (N1, P1) are forced off through the driver and sensing circuitry. At the same time, the output () is clamped to the appropriate supply rail by the clamp circuitry (N2, P2). Two clamp circuits limit the output voltage to the supply voltages. Pin Compatibility These switches have identical pinouts to common nonfault-protected CMOS switches (DG41, DG43, DG45). Exercise care in considering them as direct replacements in existing printed circuit boards, since only the NO_ and NC_ pins of each switch are fault protected. Normal Operation Two comparators continuously compare the voltage on the NO_ (or NC_) pin with and supply voltages (Figure 1). When the signal on NO_ (or NC_) is between and, the switch behaves normally, with FETs N1 and P1 turning on and off in response to NO_ (or NC_) signals. For any voltage between the supply rails, the switch is bidirectional; therefore, and NO_ (or NC_) are interchangeable. Only NO_ and NC_ can be exposed to overvoltages beyond the supply range and within the specified breakdown limits of the device. Fault Condition The protect devices connected to their outputs () through their unique fault-protection circuitry. When the input voltage is raised 5m above either supply rail, the internal sense and comparator circuitry (N3 and N-channel driver or P3 and P-channel driver) disconnect the output () from the input (Figure 1). If the switch driven above the supply rail has an on state, the clamp circuitry (N2 or P2) connects the output to the appropriate supply rail. Table 1 summarizes the switches operation under normal and fault conditions. 9

10 Table 1. Switch States in Normal and Fault Conditions POWER SUPPLIES (, ) INPUT RANGE On Between Rails On Off NC_ On Between Rails Off On NO_ On Between and (+4 - ) On Off On Between and (+4 - ) Off On On Between and (-4 - ) On Off On Between and (-4 - ) Off On Off Between Rails Off Off Follows the load terminal voltage Transient Fault Response and Recovery When a fast rising and falling transient on NO_ (or NC_) exceeds or, the output () follows the input (IN_) to the supply rail with only a few nanoseconds of delay. This delay is due to the switch on-resistance and circuit capacitance to ground. However, when the input transient returns to within the supply rails, there is a longer output recovery time delay. For positive and negative faults, the recovery time is typically 2.5µs. These values depend on the output resistance and capacitance, and are not production tested or guaranteed. The delays are not dependent on the fault amplitude. Higher output resistance and capacitance increase recovery times. Fault-Protection oltage and Power Off The maximum fault voltage on the NO_ (or NC_) pins is ±4 when the power is off. For the MAX4631/, with ±15 supplies, the highest voltage on NO_ (or NC_) can be +36, and the lowest voltage on NO (or NC_) can be -36. For the MAX4632, with ±15 supplies, the highest voltage on NO_ (or NC_) can be +25, and the lowest voltage on NO_ (or NC_) can be -25. Exceeding these limits can damage the device. IN_ Logic-Level Thresholds The logic-level thresholds are TTL/CMOS compatible when is +15. Raising increases the threshold slightly; when reaches +25, the level threshold is about 2.8 higher than the TTL output high-level minimum of 2.4, but still compatible with CMOS outputs (see Typical Operating Characteristics). Increasing has no effect on the logic-level thresholds, but it does increase the gate-drive voltage to the signal FETs, reducing their on-resistance. NC_ NO_ OUTPUT Failure Modes The are not lightning arrestors or surge protectors. Exceeding the fault-protection voltage limits on NO_ or NC_, even for very short periods, can cause the device to fail. The failure modes may not be obvious, and failure in one switch may or may not affect other switches in the same package. Applications Information Ground There is no connection between the analog signal paths and GND. The analog signal paths consist of an N-channel and a P-channel MOSFET with their sources and drains paralleled and their gates driven out of phase to and by the logic-level translators. and GND power the internal logic and logic-level translators and set the input logic thresholds. The logiclevel translators convert the logic levels to switched and signals to drive the analog switch gates. This drive signal is the only connection between the power supplies and the analog signals. GND, IN_, and have ESD-protection diodes to and. Supply-Current Reduction When the logic signals are driven rail-to-rail from to +12 or -15 to +15, the supply current reduces to approximately half of the supply current when the logic input levels are at to +5. Power Supplies The operate with bipolar supplies between ±4.5 and ±18. The and supplies need not be symmetrical, but their difference can not exceed the absolute maximum rating of +44. These devices operate from a single supply between +9 and +36 when is connected to GND. 1

11 High-Frequency Performance In 5Ω systems, signal response is reasonably flat up to 3MHz (see Typical Operating Characteristics). Above 3MHz, the on-response has several minor peaks that are highly layout dependent. The problem with high-frequency operation is not turning the switch on, but turning it off. The off-state switch acts like a capacitor and passes higher frequencies with less IN_ 5Ω IN_ MAX4631 MAX4632 GND NO_ OR NC_ +1 IS CONNECTED TO GND () FOR SINGLE-SUPPLY OPERATION. Figure 2. Switch Turn-On/Turn-Off Times R L 1pF OUT attenuation. At 1MHz, off-isolation is about -46dB in 5Ω systems, declining (approximately 2dB per decade) as frequency increases. Higher circuit impedance also diminishes off-isolation. Adjacent channel attenuation is about 3dB above that of a bare IC socket and is due entirely to capacitive coupling. IN_ OUT Test Circuits/Timing Diagrams +1 t OFF 5% 5% 9% 9% t ON IN_ 5Ω IN_ IN_ NO_ NC_ MAX IN_ NO_, NC_ t R < 5ns t F < 5ns 5% 5% 8% OUT GND R L 1pF OUT t OPEN IS CONNECTED TO GND () FOR SINGLE-SUPPLY OPERATION. Figure 3. MAX4631 Break-Before-Make Interval 11

12 IN_ 5Ω IN_ IS CONNECTED TO GND () FOR SINGLE-SUPPLY OPERATION. Q = OUT C L Figure 4. Charge Injection ADDRESS SELECT NO_ OR NC_ MAX4631 MAX4632 GND IN_ MAX4631 MAX4632 GND C L 1pF Test Circuits/Timing Diagrams (continued) OUT NO_ NC_ IN_ OUT OUT OUT IS THE MEASURED OLTAGE DUE TO CHARGE- TRANSFER ERROR Q WHEN THE CHANNEL TURNS OFF. 1MHz CAPACITANCE ANALYZER IS CONNECTED TO GND () FOR SINGLE-SUPPLY OPERATION. Figure 5., NO_, and NC_ Capacitance 12

13 ADDRESS SELECT IN_ 1nF GND MAX4631 MAX4632 NO_, NC_ 1nF MEASUREMENTS ARE STANDARDIZED AGAINST SHORT AT SOCKET TERMINALS. OFF-ISOLATION IS MEASURED BETWEEN AND OFF NO_ OR NC_ TERMINALS. ON LOSS IS MEASURED BETWEEN AND ON NO_ OR NC_ TERMINALS. SIGNAL DIRECTION THROUGH SWITCH IS REERSED; WORST ALUES ARE RECORDED. IS CONNECTED TO GND () FOR SINGLE-SUPPLY OPERATION. Figure 6. Frequency Response and Off-Isolation 1nF Test Circuits/Timing Diagrams (continued) IN OUT MEAS. NETWORK ANALYZER 5Ω 5Ω 5Ω 5Ω REF. OFF-ISOLATION = 2 log ON-LOSS = 2 log OUT IN OUT IN NETWORK ANALYZER 5Ω NO_, NC_ IN 5Ω 5Ω NO_, NC_ OUT MEAS. REF. MAX MAX Ω 5Ω IN1 GND IN2 CROSSTALK = 2 log OUT IN 1nF IS CONNECTED TO GND () FOR SINGLE-SUPPLY OPERATION. Figure 7. Crosstalk 13

14 TOP IEW COM1 N.C. N.C. N.C. N.C. N.C. N.C. COM MAX4631 DIP/SO MAX4631 LOGIC SWITCH OFF 1 ON Pin Configurations/Functional Diagrams/Truth Tables NO1 IN1 GND N.C. IN2 NO2 COM1 1 N.C. 2 COM3 3 NC3 4 NC4 5 COM4 6 N.C. 7 COM NO1 15 IN GND MAX N.C IN2 9 NO2 DIP/SO MAX4632 LOGIC SWITCHES 1, 2 1 OFF ON SWITCHES 3, 4 ON OFF SWITCHES SHOWN FOR LOGIC "" INPUT COM1 1 N.C. 2 COM3 3 NO3 4 NO4 5 COM4 6 N.C. 7 COM2 8 TRANSISTOR COUNT: NO1 IN1 GND N.C. IN2 NO2 DIP/SO LOGIC SWITCH OFF 1 ON N.C. = NOT INTERNALLY CONNECTED Chip Information 14

15 Package Information SOICN.EPS 15

16 Package Information (continued) PDIPN.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. 16 Maxim Integrated Products, 12 San Gabriel Drive, Sunnyvale, CA Maxim Integrated Products Printed USA is a registered trademark of Maxim Integrated Products.

17 Mouser Electronics Authorized Distributor Click to iew Pricing, Inventory, Delivery & Lifecycle Information: Maxim Integrated: CSE+ CSE+T MAX4631CSE+ MAX4631CSE+T MAX4631EPE+ MAX4632CSE+ MAX4632CSE+T MAX4632ESE MAX4632ESE+ MAX4632ESE+T MAX4632ESE-T