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19-1516; Rev 0; 7/99
2.5, Quad, SPST, CMOS Analog Switches
General Description
The MAX4661/MAX4662/MAX4663 quad analog switches feature low on-resistance of 2.5 max. On-resistance is matched between switches to 0.5 max and is flat (0.5 max) over the specified signal range. Each switch can handle Rail-to-Rail (R) analog signals. Offleakage current is only 5nA max at TA = +85C. These analog switches are ideal in low-distortion applications and are the preferred solution over mechanical relays in automatic test equipment or applications where current switching is required. They have lower power requirements, use less board space, and are more reliable than mechanical relays. The MAX4661 has four normally closed (NC) switches, and the MAX4662 has four normally open (NO) switches. The MAX4663 has two NC and two NO switches, and features guaranteed break-before-make switching. These devices operate from a single +4.5V to +36V supply or from dual 4.5V to 20V supplies. A separate logic supply pin guarantees TTL/CMOS-logic compatibility when operating across the entire supply voltage range. o Low On-Resistance (2.5 max) o Guaranteed RON Match Between Channels (0.5 max) o Guaranteed RON Flatness over Specified Signal Range (0.5 max) o Rail-to-Rail Signal Handling o Guaranteed Break-Before-Make (MAX4663) o > 2kV ESD Protection per Method 3015.7 o +4.5V to +36V Single-Supply Operation 4.5V to 20V Dual-Supply Operation o TTL/CMOS-Compatible Control Inputs
Features
MAX4661/MAX4662/MAX4663
Ordering Information
PART MAX4661CAE MAX4661CWE MAX4661CPE MAX4661EAE MAX4661EWE MAX4661EPE TEMP. RANGE 0C to +70C 0C to +70C 0C to +70C -40C to +85C -40C to +85C -40C to +85C PIN-PACKAGE 16 SSOP 16 Wide SO 16 Plastic DIP 16 SSOP 16 Wide SO 16 Plastic DIP
Applications
Reed Relay Replacement Test Equipment Communication Systems PBX, PABX Systems Audio-Signal Routing Avionics ADC Systems Sample-and-Hold Circuits Data Acquisition Systems
Ordering Information continued at end of data sheet.
Pin Configurations/Functional Diagrams/Truth Tables
TOP VIEW
IN1 COM1 NC1 VGND NC4 COM4 IN4 1 2 3 4 5 6 7 8 16 15 14 13 IN2 COM2 NC2 V+ VL NC3 COM3 IN3 IN1 COM1 NO1 VGND NO4 COM4 IN4 1 2 3 4 5 6 7 8 16 15 14 13 IN2 COM2 NO2 V+ VL NO3 COM3 IN3 IN1 COM1 NO1 VGND NO4 COM4 IN4 1 2 3 4 5 6 7 8 16 15 14 13 IN2 COM2 NC2 V+ VL NC3 COM3 IN3
MAX4661
12 11 10 9
MAX4662
12 11 10 9
MAX4663
12 11 10 9
SSOP/SO/DIP
MAX4661 LOGIC SWITCH 0 1 ON OFF
SSOP/SO/DIP
MAX4662 LOGIC SWITCH 0 1 OFF ON
SSOP/SO/DIP
LOGIC 0 1 MAX4663 SWITCHES 1, 4 OFF ON SWITCHES 2, 3 ON OFF
SWITCHES SHOWN FOR LOGIC "0" INPUT
Rail-to-Rail is a registered trademark of Nippon Motorola, Ltd.
________________________________________________________________ Maxim Integrated Products 1
For free samples & the latest literature: http://www.maxim-ic.com, or phone 1-800-998-8800. For small orders, phone 1-800-835-8769.
2.5, Quad, SPST, CMOS Analog Switches MAX4661/MAX4662/MAX4663
ABSOLUTE MAXIMUM RATINGS
V+ to GND ..............................................................-0.3V to +44V V- to GND ..............................................................+0.3V to -44V V+ to V-...................................................................-0.3V to +44V VL to GND .......................................(GND - 0.3V) to (V+ + 0.3V) All Other Pins to GND (Note 1) .............(V- - 0.3V) to (V+ + 0.3V) Continuous Current (COM_, NO_, NC_) ........................200mA Peak Current (COM_, NO_, NC_) (pulsed at 1ms, 10% duty cycle)................................ 300mA Continuous Power Dissipation (TA = +70C) SSOP (derate 7.1mW/C above +70C) .......................571mW Wide SO (derate 9.52mW/C above +70C).................762mW Plastic DIP (derate 10.53mW/C above +70C) ...........842mW Operating Temperature Ranges MAX466_C_E ......................................................0C to +70C MAX466_E_E ....................................................-40C to +85C Storage Temperature Range .............................-65C to +150C Lead Temperature (soldering, 10sec) .............................+300C
Note 1: Signals on NC_, NO_, COM_, or IN_ exceeding V+ or V- 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.
ELECTRICAL CHARACTERISTICS--Dual Supplies
(V+ = +15V, V- = -15V, VL = +5V, VIN_H = +2.4V, VIN_L = +0.8V, TA = TMIN to TMAX, unless otherwise noted. Typical values are at TA = +25C.) (Note 2) PARAMETER ANALOG SWITCH Input Voltage Range (Note 3) COM_ to NO or NC_ On-Resistance COM_ to NO_ or NC_ On-Resistance Match Between Channels (Notes 3, 4) COM_ to NO_ or NC_ On-Resistance Flatness (Notes 3, 5) Off-Leakage Current (NO_ or NC_) (Note 6) COM Off-Leakage Current (Note 6) COM On-Leakage Current (Note 6) LOGIC INPUT Input Current with Input Voltage High Input Current with Input Voltage Low Logic Input Voltage High Logic Input Voltage Low IIN_H IIN_L VIN_H VIN_L IN_ = 2.4V, all others = 0.8V IN_ = 0.8V, all others = 2.4V -0.5 -0.5 2.4 0.8 0.001 0.001 0.5 0.5 A A V V VCOM_, VNO_, VNC_ RON TA = +25C ICOM_ = 10mA, VNO_ or VNC_ = 10V TA = TMIN to TMAX ICOM_ = 10mA, VNO_ or VNC_= 10V ICOM_ = 10mA; VNO_ or VNC_ = -5V, 0, 5V VCOM_ = 10V, - VNO_ or VNC_= +10V TA = +25C TA = TMIN to TMAX TA = +25C TA = TMIN to TMAX TA = +25C TA = TMIN to TMAX -0.5 -5 -0.5 -5 -1 -20 0.01 0.01 0.01 0.1 V1.7 V+ 2.5 2.7 0.1 0.5 0.6 0.5 0.6 0.5 5 0.5 5 1 nA TA = TMIN to TMAX 20 nA nA V SYMBOL CONDITIONS MIN TYP MAX UNITS
RON
RFLAT(ON)
INO_, INC_ ICOM_(OFF)
TA = +25C VCOM_ = 10V, - VNO_ or VNC_ = +10V TA = TMIN to TMAX VCOM_ = 10V, VNO_ or VNC_= 10V or floating TA = +25C
ICOM_(ON)
2
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2.5, Quad, SPST, CMOS Analog Switches
ELECTRICAL CHARACTERISTICS--Dual Supplies (continued)
(V+ = +15V, V- = -15V, VL = +5V, VIN_H = +2.4V, VIN_L = +0.8V, TA = TMIN to TMAX, unless otherwise noted. Typical values are at TA = +25C.) (Note 2) PARAMETER POWER SUPPLY Power-Supply Range Positive Supply Current Negative Supply Current Logic Supply Current Ground Current I+ IIL IGND VIN = 0 or 5V VIN = 0 or 5V VIN = 0 or 5V VIN = 0 or 5V TA = +25C TA = TMIN to TMAX TA = +25C TA = TMIN to TMAX TA = +25C TA = TMIN to TMAX TA = +25C TA = TMIN to TMAX TA = +25C TA = TMIN to TMAX TA = +25C TA = TMIN to TMAX 5 30 300 -56 -59 55 55 250 100 4.5 -0.5 -5 -0.5 -5 -0.5 -5 -0.5 -5 130 0.001 0.001 0.001 0.001 20.0 0.5 5 0.5 5 0.5 5 0.5 5 275 400 175 300 V A A A A SYMBOL CONDITIONS MIN TYP MAX UNITS
MAX4661/MAX4662/MAX4663
SWITCH DYNAMIC CHARACTERISTICS Turn-On Time Turn-Off Time Break-Before-Make Time (MAX4663 only) Charge Injection Off-Isolation (Note 7) Crosstalk (Note 8) NC_ or NO_ Capacitance COM_ Off-Capacitance On-Capacitance tON tOFF tOPEN Q VISO VCT COFF CCOM CCOM VCOM_ = 10V, Figure 2 VCOM_ = 10V, Figure 2 ns ns ns pC dB dB pF pF pF
VCOM_ = 10V, Figure 3, TA = +25C CL = 1.0nF, VGEN = 0, RGEN = 0, Figure 4 RL = 50, CL = 5pF, f = 1MHz, Figure 5 RL = 50, CL = 5pF, f = 1MHz, Figure 6 f = 1MHz, Figure 7 f = 1MHz, Figure 7 f = 1MHz, Figure 8
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3
2.5, Quad, SPST, CMOS Analog Switches MAX4661/MAX4662/MAX4663
ELECTRICAL CHARACTERISTICS--Single Supply
(V+ = +12V, V- = 0, VL = +5V, VIN_H = +2.4V, VIN_L = +0.8V, TA = TMIN to TMAX, unless otherwise noted. Typical values are at TA = +25C.) (Note 2) PARAMETER ANALOG SWITCH Input Voltage Range (Note 3) COM_ to NO or NC_ On-Resistance COM_ to NO_ or NC_ On-Resistance Match Between Channels (Notes 3, 4) COM_ to NO_ or NC_ On-Resistance Flatness (Notes 3, 5) Off-Leakage Current (NO_ or NC_) (Notes 6, 9) COM Off-Leakage Current (Notes 6, 9) COM On-Leakage Current (Notes 6, 9) LOGIC INPUT Input Current with Input Voltage High Input Current with Input Voltage Low Logic Input Voltage High Logic Input Voltage Low POWER SUPPLY Power-Supply Range Positive Supply Current Logic Supply Current Ground Current I+ IL IGND VIN = 0 or 5V VIN = 0 or 5V VIN = 0 or 5V TA = +25C TA = TMIN to TMAX TA = +25C TA = TMIN to TMAX TA = +25C TA = TMIN to TMAX +4.5 -0.5 -5 -0.5 -5 -0.5 -5 0.001 0.001 0.001 +36.0 0.5 5 0.5 5 0.5 5 V A A A IIN_H IIN_L VIN_H VIN_L IN_ = 2.4V, all others = 0.8V IN_ = 0.8V, all others = 2.4V -0.5 -0.5 2.4 0.8 0.001 0.001 0.5 0.5 A A V V VCOM_, VNO_, VNC_ RON ICOM_ = 10mA, VNO_ or VNC_ = 10V ICOM_ = 10mA, VNO_ or = VNC_= 10V ICOM_ = 10mA; VNO_ or VNC_ = 3V, 6V, 9V VCOM_ = 1V, 10V; VNO_ or VNC_ = 10V, 1V VNO_ or VNC_ = 10V, 1V; VCOM_ = 1V, 10V VCOM_ = 1V ,10V; VNO_ or VNC_ = 1V, 10V, or floating TA = +25C TA = TMIN to TMAX TA = +25C TA = TMIN to TMAX TA = +25C TA = TMIN to TMAX TA = +25C TA = TMIN to TMAX TA = +25C TA = TMIN to TMAX TA = +25C TA = TMIN to TMAX -0.5 -5 -0.5 -5 -1 -20 0.01 0.01 0.01 0.1 0.03 GND 3 V+ 4 5 0.4 0.5 0.7 0.8 0.5 nA 5 0.5 5 1 nA 20 nA V SYMBOL CONDITIONS MIN TYP MAX UNITS
RON
RFLAT(ON)
INO_ INC_ ICOM_(OFF)
ICOM_(ON)
4
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2.5, Quad, SPST, CMOS Analog Switches
ELECTRICAL CHARACTERISTICS--Single Supply (continued)
(V+ = +12V, V- = 0, VL = +5V, VIN_H = +2.4V, VIN_L = +0.8V, TA = TMIN to TMAX, unless otherwise noted. Typical values are at TA = +25C.) (Note 2) PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS
MAX4661/MAX4662/MAX4663
SWITCH DYNAMIC CHARACTERISTICS Turn-On Time (Note 3) Turn-Off Time (Note 3) Break-Before-Make Time (MAX4663 only) (Note 3) Charge Injection Crosstalk (Note 8) NC_ or NO_ Capacitance COM Off-Capacitance On-Capacitance tON tOFF tOPEN Q VCT COFF CCOM CCOM VCOM_ = 10V, Figure 2 VCOM_ = 10V, Figure 2 TA = +25C TA = TMIN to TMAX TA = +25C TA = TMIN to TMAX 5 125 20 -60 85 85 140 100 200 400 500 250 350 ns ns ns pC dB pF pF pF
VCOM_ = 10V, Figure 3, TA = +25C CL = 1.0nF, VGEN = 0, RGEN = 0, Figure 4 RL = 50, CL = 5pF, f = 1MHz, Figure 6 f = 1MHz, Figure 7 f = 1MHz, Figure 7 f = 1MHz, Figure 8
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: Guaranteed by design. Note 4: RON = RON(MAX) - RON(MIN). Note 5: Flatness is defined as the difference between the maximum and minimum value of on-resistance as measured over the specified analog signal range. Note 6: Leakage parameters are 100% tested at maximum-rated hot temperature and guaranteed by correlation at +25C. 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: Leakage testing at single supply is guaranteed by testing with dual supplies.
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5
2.5, Quad, SPST, CMOS Analog Switches MAX4661/MAX4662/MAX4663
Typical Operating Characteristics
(TA = +25C, unless otherwise noted.)
ON-RESISTANCE vs. VCOM (DUAL SUPPLIES)
MAX4661/2/3-01
ON-RESISTANCE vs. VCOM AND TEMPERATURE (DUAL SUPPLIES)
MAX4661/2/3-02
ON-RESISTANCE vs. VCOM (SINGLE SUPPLY)
9 8 7 RON () 6 5 4 V+ = 12V V+ = 24V V+ = 5V
MAX4661/2/3-03
5.0 4.5 4.0 3.5 RON () V+, V- = 5V
2.50 2.25 2.00 1.75 RON () 1.50 1.25 1.00 0.75 TA = +25C TA = -40C V+, V- = 15V -15 -10 -5 0 VCOM (V) 5 10 TA = +85C
10
3.0 2.5 2.0 1.5 1.0 0.5 0 -20 -15 -10 -5 0 VCOM (V) 5 10 15 20 V+, V- = 15V V+, V- = 20V
3 2 1 0 15 0 2 4 6
0.50 0.25 0
8 10 12 14 16 18 20 22 24 VCOM (V)
ON-RESISTANCE vs. VCOM AND TEMPERATURE (SINGLE SUPPLY)
MAX4661/2/3-04
ON/OFF-LEAKAGE CURRENT vs. TEMPERATURE
10k 1k LEAKAGE (pA) 100 10 1 0.1 0.01 OFF-LEAKAGE -100 -200 -40 -20 0 20 40 60 80 100 -20 -15 Q (pC) V+ = +15V V- = -15V ON-LEAKAGE 200 100 0
MAX4661/2/3-05
CHARGE INJECTION vs. VCOM
MAX4661/2/3-06
4.00 3.50 3.00 RON () 2.50 2.00 1.50 1.00 0.50 0 0 1 2 3 4 5 6 7 8 V+ = +12V V- = GND TA = -40C TA = +85C TA = +25C
100k
400 300
V- = -15V V+ = +15V
V- = GND V+ = 12V
1m 0.1m 9 10 11 12 VCOM (V) TEMPERATURE (C) -10 -5 0 VCOM (V) 5 10 15 20
POWER-SUPPLY CURRENT vs. TEMPERATURE
10k 1k I+, I- (nA) I+ 10 1 0.1 0.01 0.001 -40 -20 0 20 40 60 80 100 TEMPERATURE (C) ILOSS (dB) 100 V+ = +15V V- = -15V
MAX4661/2/3-07
FREQUENCY RESPONSE
0 -10 -20 -30 -40 -50 -60 -70 -80 -90 -100 0.1 1 10 FREQUENCY (MHz) OFF-ISOLATION V+ = +15V V- = -15V INPUT = OdBm 50 IN AND OUT ON-PHASE ON-RESPONSE
MAX4661/2/3-08
100k
180 90 -0 PHASE (degrees) -90 -180 -270 -360 -450 -540 -630
-720 100
6
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2.5, Quad, SPST, CMOS Analog Switches
Pin Description
PIN NAME MAX4661 1, 16, 9, 8 2, 15, 10, 7 3, 14, 11, 6 -- -- -- 4 5 12 13 MAX4662 1, 16, 9, 8 2, 15, 10, 7 -- 3, 14, 11, 6 -- -- 4 5 12 13 MAX4663 1, 16, 9, 8 2, 15, 10, 7 -- -- 3, 6 14, 11 4 5 12 13 IN1, IN2, IN3, IN4 COM1, COM2, COM3, COM4 NC1, NC2, NC3, NC4 NO1, NO2, NO3, NO4 NO1, NO4 NC2, NC3 VGND VL V+ Logic-Control Digital Inputs Analog Switch Common Terminals Analog Switch Normally Closed Terminals Analog Switch Normally Open Terminals Analog Switch Normally Open Terminals Analog Switch Normally Closed Terminals Negative Analog Supply-Voltage Input. Connect to GND for singlesupply operation. Ground Logic-Supply Input Positive Analog Supply Input FUNCTION
MAX4661/MAX4662/MAX4663
Applications Information
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, NO, or COM. If power-supply sequencing is not possible, add two small-signal diodes (D1, D2) in series with the supply pins and a Schottky diode between V+ and VL 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 and low leakage characteristics. Device operation is unchanged, and the difference between V+ and Vshould not exceed 44V.
Above 5MHz, circuit board layout becomes critical and it becomes difficult to characterize the response of the switch independent of the circuit. The graphs shown in the Typical Operating Characteristics were taken using a 50 source and load connected with BNC connectors to a circuit board deemed "average"; that is, designed with isolation in mind, but not using stripline or other special RF circuit techniques. For critical applications above 5MHz, use the MAX440, MAX441, and MAX442, which are fully characterized up to 160MHz.
+15V D1 V+ VL
MAX4661 MAX4662 MAX4663
NO_
*
COM_
* *
VD2
Off-Isolation at High Frequencies
In 50 systems, the high-frequency on-response of these parts extends from DC to above 100MHz 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. (Above 300MHz, the switch actually passes more signal turned off than turned on.) This effect is more pronounced with higher source and load impedances.
*
* INTERNAL PROTECTION DIODES
-15V
Figure 1. Overvoltage Protection Using External Blocking Diodes
7
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2.5, Quad, SPST, CMOS Analog Switches MAX4661/MAX4662/MAX4663
+5V LOGIC INPUT +3V 50% 0 t r < 20ns t f < 20ns SWITCH V COM_ INPUT t OFF IN_ VO SWITCH OUTPUT 0 t ON 0.9V0 0.9V0 LOGIC INPUT GND 0 VL COM_
+15V V+ NO_ OR NC_
MAX4661 MAX4662 MAX4663
SWITCH OUTPUT VO RL 100 CL 35pF
V-15V
LOGIC INPUT WAVEFORMS INVERTED FOR SWITCHES THAT HAVE THE OPPOSITE LOGIC SENSE.
REPEAT TEST FOR EACH SWITCH. FOR LOAD CONDITIONS, SEE Electrical Characteristics. CL INCLUDES FIXTURE AND STRAY CAPACITANCE. RL VO = VCOM RL + RON
(
)
Figure 2. Switching-Time Test Circuit
MAX4663
VCOM1 VCOM2 COM1 COM2 IN1, 2 LOGIC INPUT GND
+15V V+
LOGIC INPUT NO NC RL2 VOUT2 CL2 RL1 VOUT1 CL1 SWITCH OUTPUT 1 (VOUT1) SWITCH OUTPUT 2 (VOUT2) RL = 100 CL = 35pF
+3V 50% 0V 0.9 * V0UT1 0V
V-15V
0.9 * VOUT2 0V tD tD
CL INCLUDES FIXTURE AND STRAY CAPACITANCE.
Figure 3. Break-Before-Make Interval (MAX4663 only)
8
_______________________________________________________________________________________
2.5, Quad, SPST, CMOS Analog Switches MAX4661/MAX4662/MAX4663
MAX4661 MAX4662 MAX4663
RGEN
+5V VL COM
+15V V+ VO NC OR NO CL IN VVO VIN
VO
V GEN GND
OFF
ON
OFF
-15V VIN = +3V
VIN
OFF
ON Q = (V O )(C L )
OFF
VIN DEPENDS ON SWITCH CONFIGURATION; INPUT POLARITY DETERMINED BY SENSE OF SWITCH.
Figure 4. Charge-Injection Test Circuit
+15V
+5V
MAX4661 MAX4662 MAX4663
SIGNAL GENERATOR 0dBm
+15V
+5V
MAX4661 MAX4662 MAX4663
N_1 IN2 0 OR 3.0V 50
SIGNAL GENERATOR 0dBm COM
V+ COM1 IN1
V+
VL
VL
IN ANALYZER RL -15V COM NC OR NO GND V-
0 OR 3.0V
3.0V N_2 GND RL -15V COM2 V-
ANALYZER
N.C.
Figure 5. Off-Isolation Test Circuit
Figure 6. Crosstalk Test Circuit
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9
2.5, Quad, SPST, CMOS Analog Switches MAX4661/MAX4662/MAX4663
+15V
+5V
MAX4661 MAX4662 MAX4663
+15V
+5V
MAX4661 MAX4662 MAX4663
V+ COM
VL CAPACITANCE METER IN
V+ COM
VL
IN 0 OR 3.0V f = 1MHz NC OR NO
CAPACITANCE METER NC OR NO f = 1MHz GND V-
0 OR 3.0V
GND
V-
-15V
-15V
Figure 7. Switch Off-Capacitance Test Circuit
Figure 8. Switch On-Capacitance Test Circuit
Ordering Information (continued)
PART MAX4662CAE MAX4662CWE MAX4662CPE MAX4662EAE MAX4662EWE MAX4662EPE MAX4663CAE MAX4663CWE MAX4663CPE MAX4663EAE MAX4663EWE MAX4663EPE TEMP. RANGE 0C to +70C 0C to +70C 0C to +70C -40C to +85C -40C to +85C -40C to +85C 0C to +70C 0C to +70C 0C to +70C -40C to +85C -40C to +85C -40C to +85C PIN-PACKAGE 16 SSOP 16 Wide SO 16 Plastic DIP 16 SSOP 16 Wide SO 16 Plastic DIP 16 SSOP 16 Wide SO 16 Plastic DIP 16 SSOP 16 Wide SO 16 Plastic DIP
Chip Information
TRANSISTOR COUNT: 108
10
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2.5, Quad, SPST, CMOS Analog Switches
Package Information
SSOP.EPS
MAX4661/MAX4662/MAX4663
______________________________________________________________________________________
11
2.5, Quad, SPST, CMOS Analog Switches MAX4661/MAX4662/MAX46663
Package Information (continued)
SOICW.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.
12 ____________________Maxim Integrated Products, 120 San Gabriel Drive, Sunnyvale, CA 94086 408-737-7600 (c) 1999 Maxim Integrated Products Printed USA is a registered trademark of Maxim Integrated Products.

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