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19-0347; Rev 1; 10/97
Precision, Single-Supply, SPST Analog Switches
_______________General Description
The MAX323/MAX324/MAX325 are precision, dual, SPST analog switches. They are single-supply devices designed to operate from +2.7V to +16V. The MAX323 has two normally open (NO) switches, and the MAX324 has two normally closed (NC) switches. The MAX325 has one NO and one NC switch. Low power consumption (5W) makes these parts ideal for battery-powered equipment. These switches offer low leakage currents (100pA max) and fast switching speeds (tON = 150ns max, tOFF = 100ns max). When powered from a 5V supply, the MAX323 series offers 2 max matching between channels, 60 max on-resistance, and 6 max RON flatness. These switches also offer 5pC max charge injection, and a minimum of 2000V ESD per Method 3015.7. For equivalent devices specified for dual-supply operation, see the MAX320/MAX321/MAX322 data sheet. For quad versions of the MAX320 series, see MAX391/ MAX392/MAX393 data sheet.
____________________________Features
o Low On-Resistance (RON), 60 max (33 typ) o RON Matching Between Channels <2 o RON Flatness <6 Max o Guaranteed Charge Injection <5pC o Single-Supply Operation (+2.7V to +16V) o Low Power Consumption, <5W o Low Leakage Current Over Temperature, <2.5nA at +85C o Fast Switching: tON <150ns, tOFF <100ns o Guaranteed Break-Before-Make (MAX325 only) o TTL/CMOS Logic Compatible
MAX323/MAX324/MAX325
______________Ordering Information
PART MAX323CPA MAX323CUA TEMP. RANGE 0C to +70C 0C to +70C PIN-PACKAGE 8 Plastic DIP 8 MAX
________________________Applications
Battery-Operated Systems Sample-and-Hold Circuits Heads-Up Displays Test Equipment Guidance and Control Systems Communications Systems Audio and Video Switching Military Radios +3V, +5V DACs and ADCs PBX, PABX
MAX323CSA 0C to +70C 8 SO MAX323C/D 0C to +70C Dice* MAX323EPA -40C to +85C 8 Plastic DIP MAX323ESA -40C to +85C 8 SO MAX323EJA -40C to +85C 8 CERDIP** MAX323MJA -55C to +125C 8 CERDIP** Ordering Information continued at end of data sheet. * Contact factory for dice specifications. ** Contact factory for availability.
_____________________Pin Configurations/Functional Diagrams/Truth Tables
TOP VIEW
MAX323
NO1 1 COM1 2 IN2 3 V- 4 DIP/SO/MAX
MAX323 LOGIC SWITCH 0 1 OFF ON 8 7 6 5
MAX324
V+ IN1 COM2 NO2 NC1 1 COM1 2 IN2 3 V- 4 DIP/SO/MAX
MAX324 LOGIC SWITCH 0 1 ON OFF 8 7 6 5
MAX325
V+ IN1 COM2 NC2 NO1 1 COM1 2 IN2 3 V- 4 DIP/SO/MAX
LOGIC 0 1 MAX325 SWITCH 1 OFF ON SWITCH 2 ON OFF 8 7 6 5
V+ IN1 COM2 NC2
SWITCHES SHOWN FOR LOGIC "0" INPUT
________________________________________________________________ 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 408-737-7600 ext. 3468.
Precision, Single-Supply, SPST Analog Switches MAX323/MAX324/MAX325
ABSOLUTE MAXIMUM RATINGS
Voltage Referenced to GND V+ .........................................................................-0.3V to +17V IN_, COM_, NC_, NO_ (Note 1)..................-0.3V to (V+ + 0.3V) Continuous Current (any terminal) ......................................30mA Peak Current, COM_, NO_, NC_ (pulsed at 1ms, 10% duty cycle max) ............................100mA ESD per Method 3015.7 ..................................................>2000V Continuous Power Dissipation Plastic DIP (derate 9.09mW/C above +70C) ..............727mW Narrow SO (derate 5.88mW/C above +70C) ..............471mW CERDIP (derate 8.00mW/C above +70C) ...................640mW MAX (derate 4.10mW/C above +70C) ......................330mW Operating Temperature Ranges MAX32_C_ _ .........................................................0C to +70C MAX32_E_ _.......................................................-40C to +85C MAX32_MJA ....................................................-55C to +125C Storage Temperature Range .............................-65C to +150C Lead Temperature (soldering, 10sec) .............................+300C
Note 1: Signals on NC, NO, COM, or IN exceeding V+ or V- are 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--Single +5V Supply
(V+ = 5V 10%, GND = 0V, VINH = 2.4V, VINL = 0.8V, TA = TMIN to TMAX, unless otherwise noted.) PARAMETER ANALOG SWITCH Analog Signal Range VCOM, VNO, VNC RON (Note 3) 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 C, E M C, E M C, E M -0.1 -5 -40 -0.1 -5 -40 -0.2 -10 -50 0.01 2 0.8 0 33 V+ 60 75 2 4 6 8 0.1 5 40 0.1 5 40 0.2 10 50 nA nA nA V SYMBOL CONDITIONS MIN TYP (Note 2) MAX UNITS
On-Resistance On-Resistance Match Between Channels (Note 4) On-Resistance Flatness (Notes 3, 5)
V+ = 4.5V, ICOM = 1.0mA, VNO or VNC = 3.5V V+ = 5V, RON ICOM = 1.0mA, VNO or VNC = 3V V+ = 5V, RFLAT(ON) ICOM = 1.0mA, VNO or VNC = 1V, 2V, 3V INO(OFF)
or INC(OFF)

NO or NC Off Leakage Current (Note 6)
V+ = 5.5V, VCOM = 1V, VNO or VNC = 4.5V
COM Off Leakage Current (Note 6)
V+ = 5.5V, ICOM(OFF) VCOM = 4.5V, VNO or VNC = 1V V+ = 5.5V, VCOM = 5V, or VNO or VNC = 5V
COM On Leakage Current (Note 6)
ICOM(ON)
2
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Precision, Single-Supply, SPST Analog Switches
ELECTRICAL CHARACTERISTICS--Single +5V Supply (continued)
(V+ = 5V 10%, GND = 0V, VINH = 2.4V, VINL = 0.8V, TA = TMIN to TMAX, unless otherwise noted.) PARAMETER DYNAMIC Turn-On Time Turn-Off Time Break-Before-Make Time Delay (Note 3) Charge Injection (Note 3) Off Isolation (Note 7) Crosstalk (Note 8) NC or NO Capacitance COM Off Capacitance COM On Capacitance SUPPLY Power-Supply Range Positive Supply Current LOGIC INPUT Input Voltage Low Input Voltage High VINL VINH 2.4 0.8 V V I+ V+ = 5.5V, VIN = 0V or V+, all channels on or off 2.7 -1 0.0001 16 1 V A COFF tON tOFF tD Q OIRR VNO or VNC = 3V VNO or VNC = 3V TA = +25C TA = TMIN to TMAX TA = +25C TA = TMIN to TMAX 2 1 72 85 9 9 22 5 25 85 150 240 100 150 ns ns ns pC dB dB pF pF pF SYMBOL CONDITIONS MIN TYP (Note 2) MAX UNITS
MAX323/MAX324/MAX325
MAX325 only, RL = 300, CL = 35pF CL = 1.0nF, VGEN = 0V, RGEN = 0V, Figure 4 RL = 50, CL = 5pF, f = 1MHz, Figure 5 RL = 50, CL = 5pF, f = 1MHz, Figure 6 f = 1MHz, Figure 7 TA = +25C TA = +25C TA = +25C TA = +25C TA = +25C TA = +25C
CCOM(OFF) f = 1MHz, Figure 7 CCOM(ON) f = 1MHz, Figure 8
_______________________________________________________________________________________
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Precision, Single-Supply, SPST Analog Switches MAX323/MAX324/MAX325
ELECTRICAL CHARACTERISTICS--Single +3.3V Supply
(V+ = 3.0V to 3.6V, GND = 0V, VINH = 2.4V, VINL = 0.6V, TA = TMIN to TMAX, unless otherwise noted.) PARAMETER ANALOG SWITCH Analog Signal Range VCOM, VNO, VNC RON (Note 3) V+ = 3V, ICOM = 1.0mA, VNO or VNC = 1.5V TA = +25C TA = TMIN to TMAX TA = +25C TA = TMIN to TMAX TA = +25C TA = TMIN to TMAX TA = +25C TA = +25C 2 5 1 5 40 160 0 83 V+ 175 275 400 500 125 175 V SYMBOL CONDITIONS MIN TYP (Note 2) MAX UNITS
Channel On-Resistance DYNAMIC Turn-On Time (Note 3) Turn-Off Time (Note 3) Break-Before-Make Time Delay (Note 3) Charge Injection (Note 3) SUPPLY Positive Supply Current Note 2: Note 3: Note 4: Note 5: Note 6: Note 7: Note 8:
tON tOFF tD Q
VNO or VNC = 1.5V VNO or VNC = 1.5V MAX325 only, RL = 300, CL = 35pF CL = 1.0nF, VGEN = 0V, RGEN = 0V
ns ns ns pC
I+
V+ = 3.6V, VIN = 0V or V+, all channels on or off
-1
1
A
The algebraic convention, where the most negative value is a minimum and the most positive value a maximum, is used in this data sheet. Guaranteed by design. RON = RON max - RON min. Flatness is defined as the difference between the maximum and minimum value of on-resistance as measured over the specified analog signal range. Leakage parameters are 100% tested at maximum rated hot temperature and guaranteed by correlation at +25C. Off Isolation = 20 log10 [ VCOM (VNC or VNO) ], VCOM = output, VNC or VNO = input to off switch. Between any two switches.
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_______________________________________________________________________________________
Precision, Single-Supply, SPST Analog Switches
__________________________________________Typical Operating Characteristics
(TA = +25C, unless otherwise noted.)
MAX323/MAX324/MAX325
RON vs. VCOM
MAX323-01
RON vs. VCOM OVER TEMPERATURE
A: V+ = 3V B: V+ = 5V C: V+ = 12V
MAX323-02
RON vs. VCOM OVER TEMPERATURE
A: B: C: D: TA = -55C TA = +25C TA = +85C TA = +125C
MAX323-03
80 70 60 A RON ()
60 V+ = 5V 50 D 40 RON () 30 B 20 A A: B: C: D: 1 2 3 TA = -55C TA = +25C TA = +85C TA = +125C 4 5
1
0.8 C
RON ()
50 40 30 20 10 0 0 2 4 6 VCOM (V) 8 10 12 C B
0.6 D
0.4
10 0 0 VCOM (V)
0.2 A 0 0
C B 1 2 3 4 5
VCOM (V)
ON LEAKAGE CURRENT vs. TEMPERATURE
MAX323-04
OFF LEAKAGE CURRENT vs. TEMPERATURE
MAX323-05
CHARGE INJECTION vs. VCOM
V+ = 5V 2 1 Q (pC) 0 -1 -2 -3
MAX323-06
100 10 1 0.1 0.01
100 10 OFF LEAKAGE (nA) 1 0.1 0.01 V+ = 5.5V VCOM = 1V VNC OR VNO = 1V
3
ON LEAKAGE (nA)
0.001 0.0001 -55 -35 -15 5 25 45 65 85 105 125 TEMPERATURE (C)
0.001 0.0001 -55 -35 -15 5 25 45 65 85 105 125 TEMPERATURE (C)
0
1
2
3
4
5
VCOM (V)
SUPPLY CURRENT vs. TEMPERATURE
9 8 7 I+ (nA) 6 5 4 3 2 1 0 -55 -35 -15 5 25 45 65 85 105 125 TEMPERATURE (C) V+ = 5V IN1, IN2 = GND OR V+
MAX323-07
10
_______________________________________________________________________________________
5
Precision, Single-Supply, SPST Analog Switches MAX323/MAX324/MAX325
_____________________Pin Description
PIN NAME NO1 1 NC1 2, 6 3, 7 4 COM1, COM2 IN2, IN1 GND NO2 5 NC2 8 V+ Normally Closed Analog Switch Terminal (MAX324/MAX325) Positive Supply Normally Closed Analog Switch Terminal (MAX324 only) Analog Switch Common Terminal
Vg NO COM
FUNCTION Normally Open Analog Switch Terminal (MAX323/MAX325)
POSITIVE SUPPLY D1 V+
Logic Inputs Ground Normally Open Analog Switch Terminal (MAX323 only)
GND D2
Figure 1. Overvoltage Protection Using Two External Blocking Diodes
__________Applications Information
Logic Levels
The MAX323/MAX324/MAX325 are TTL compatible when powered from a single +5V supply. When powered from other supply voltages, TTL compatibility is not guaranteed, and the logic inputs should be driven from rail to rail. For example, with a 15V supply, IN1 and IN2 should be driven low to 0V and high to 15V. Similarly, with a 3.3V supply, IN1 and IN2 should be driven low to 0V and high to 3.3V Driving IN1 and IN2 rail-to-rail minimizes power consumption.
or logic signals are not current-limited. If this sequencing is not possible, and if the analog or logic inputs are not current-limited to <30mA, add a small-signal diode (D1) as shown in Figure 1. If the analog signal can dip below GND, add D2. Adding protection diodes reduces the analog signal range to a diode-drop (about 0.7V) below V+ (for D1), and to a diode-drop above ground (for D2). Leakage is unaffected by adding the diodes. On-resistance increases by a small amount at low supply voltages. Maximum supply voltage (V+) must not exceed 17V. Adding protection diodes causes the logic thresholds to be shifted relative to the power-supply rails. This can be significant when low supply voltages (5V or less) are used. With a 5V supply, TTL compatibility is not guaranteed when protection diodes are added. Driving IN1 and IN2 all the way to the supply rails (i.e. to a diodedrop higher than the V+ pin, or to a diode-drop lower than the GND pin) is always acceptable. Protection diodes D1 and D2 also protect against some overvoltage situations. With Figure 1's circuit, if the supply voltage is below the absolute maximum rating, and if a fault voltage up to the absolute maximum rating is applied to an analog signal pin, no damage will result. For example, with a +5V supply, analog signals up to 8V will not damage the circuit of Figure 1. If only a single fault signal is present, the fault voltage can rise to +17V or to -12V without damage occurring.
Analog Signal Levels
Analog signals that range over the entire supply voltage (V+ to GND) can be switched with very little change in on-resistance over the entire voltage range (see Typical Operating Characteristics). All the switches are bidirectional, so NO_, NC_, and COM_ pins can be used as either inputs or outputs.
Power-Supply Sequencing and Overvoltage Protection
Do not exceed the absolute maximum ratings, because stresses beyond the listed ratings may cause permanent damage to the devices. Proper power-supply sequencing is recommended for all CMOS devices. Always apply V+ before applying analog signals or logic inputs, especially if the analog
6
_______________________________________________________________________________________
Precision, Single-Supply, SPST Analog Switches
______________________________________________Test Circuits/Timing Diagrams
MAX323 MAX324 MAX325
SWITCH INPUT V COM COM +5V V+ NO or NC RL 1k IN VOUT LOGIC INPUT GND 0V CL INCLUDES FIXTURE AND STRAY CAPACITANCE. RL VOUT = VCOM RL + RON SWITCH OUTPUT 0V t ON 0.9 x V0UT 0.9 x VOUT SWITCH OUTPUT VOUT CL 35pF t OFF LOGIC INPUT +3V 50% 0V t r < 20ns t f < 20ns
MAX323/MAX324/MAX325
(
)
LOGIC INPUT WAVEFORMS INVERTED FOR SWITCHES THAT HAVE THE OPPOSITE LOGIC SENSE.
Figure 2. Switching Time
MAX325
VCOM1 = +3V VCOM2 = +3V COM1 COM2 IN LOGIC INPUT GND
+5V V+ VOUT1 VOUT2 RL2 300 CL2 35pF CL1 35pF LOGIC INPUT
+3V 50% 0V
NO1 NC2 RL1 300
SWITCH OUTPUT 1 (VOUT1) SWITCH OUTPUT 2 (VOUT2)
0.9 x V0UT1 0V
0.9 x VOUT2 0V tD tD
CL INCLUDES FIXTURE AND STRAY CAPACITANCE.
Figure 3. Break-Before-Make Interval (MAX325 only)
+5V
MAX323 MAX324 MAX325
VOUT VOUT VOUT CL IN OFF ON OFF
V+ RGEN COM NC or NO IN
V GEN
GND
VIN = +3V
IN
OFF
ON Q = (V OUT )(C L )
OFF
IN DEPENDS ON SWITCH CONFIGURATION; INPUT POLARITY DETERMINED BY SENSE OF SWITCH.
Figure 4. Charge Injection
_______________________________________________________________________________________ 7
Precision, Single-Supply, SPST Analog Switches MAX323/MAX324/MAX325
_________________________________Test Circuits/Timing Diagrams (continued)
10nF SIGNAL GENERATOR 0dBm
+5V
MAX323 MAX324 MAX325
SIGNAL GENERATOR 0dBm 0V or 2.4V 0V or 2.4V
10nF +5V
MAX323 MAX324 MAX325
N01 IN2 50
COM
V+
V+ COM1 IN1
IN ANALYZER RL NC COM or NO GND
0V or 2.4V NC
ANALYZER RL
N02 GND
COM2
Figure 5. Off Isolation
Figure 6. Crosstalk
10nF
+5V
V+ COM
MAX323 MAX324 MAX325
10nF
+5V
MAX323 MAX324 MAX325
V+ COM CAPACITANCE METER IN f = 1MHz NC or NO GND 0V or 2.4V
IN CAPACITANCE METER f = 1MHz NC or NO GND
0V or 2.4V
Figure 7. Channel-Off Capacitance
Figure 8. Channel-On Capacitance
8
_______________________________________________________________________________________
Precision, Single-Supply, SPST Analog Switches
__Ordering Information (continued)
PART MAX324CPA MAX324CUA MAX324CSA MAX324C/D MAX324EPA MAX324ESA MAX324EJA MAX324MJA MAX325CPA MAX325CUA MAX325CSA MAX325C/D MAX325EPA MAX325ESA MAX325EJA MAX325MJA TEMP. RANGE 0C to +70C 0C to +70C 0C to +70C 0C to +70C -40C to +85C -40C to +85C -40C to +85C -55C to +125C 0C to +70C 0C to +70C 0C to +70C 0C to +70C -40C to +85C -40C to +85C -40C to +85C -55C to +125C PIN-PACKAGE 8 Plastic DIP 8 MAX 8 SO Dice* 8 Plastic DIP 8 SO 8 CERDIP** 8 CERDIP** 8 Plastic DIP 8 MAX 8 SO Dice* 8 Plastic DIP 8 SO 8 CERDIP** 8 CERDIP**
___________________Chip Topography
MAX323/MAX324/MAX325
NO/NC V+ COM1 IN1 0.075" (1.90mm) IN2 COM2
V-
NO/NC
* Contact factory for dice specifications. ** Contact factory for availability.
0.055" (1.40mm)
TRANSISTOR COUNT: 91 SUBSTRATE IS CONNECTED TO V+
_______________________________________________________________________________________
9
Precision, Single-Supply, SPST Analog Switches MAX323/MAX324/MAX325
________________________________________________________Package Information
DIM
C A 0.101mm 0.004 in B A1 L
e
A A1 B C D E e H L
INCHES MAX MIN 0.044 0.036 0.008 0.004 0.014 0.010 0.007 0.005 0.120 0.116 0.120 0.116 0.0256 0.198 0.188 0.026 0.016 6 0
MILLIMETERS MIN MAX 0.91 1.11 0.10 0.20 0.25 0.36 0.13 0.18 2.95 3.05 2.95 3.05 0.65 4.78 5.03 0.41 0.66 0 6
E
H
8-PIN MAX MICROMAX SMALL OUTLINE PACKAGE
D
E D A3 A A2 E1
DIM A A1 A2 A3 B B1 C D1 E E1 e eA eB L
L A1 e B D1
0 - 15 C B1 eA eB
INCHES MAX MIN 0.200 - - 0.015 0.175 0.125 0.080 0.055 0.022 0.016 0.065 0.045 0.012 0.008 0.080 0.005 0.325 0.300 0.310 0.240 - 0.100 - 0.300 0.400 - 0.150 0.115 INCHES MIN MAX 0.348 0.390 0.735 0.765 0.745 0.765 0.885 0.915 1.015 1.045 1.14 1.265
MILLIMETERS MIN MAX - 5.08 0.38 - 3.18 4.45 1.40 2.03 0.41 0.56 1.14 1.65 0.20 0.30 0.13 2.03 7.62 8.26 6.10 7.87 2.54 - 7.62 - - 10.16 2.92 3.81 MILLIMETERS MIN MAX 8.84 9.91 18.67 19.43 18.92 19.43 22.48 23.24 25.78 26.54 28.96 32.13
Plastic DIP PLASTIC DUAL-IN-LINE PACKAGE (0.300 in.)
DIM PINS D D D D D D 8 14 16 18 20 24
10
______________________________________________________________________________________
Precision, Single-Supply, SPST Analog Switches
___________________________________________Package Information (continued)
DIM INCHES MAX MIN 0.069 0.053 0.010 0.004 0.019 0.014 0.010 0.007 0.157 0.150 0.050 0.244 0.228 0.050 0.016 MILLIMETERS MIN MAX 1.35 1.75 0.10 0.25 0.35 0.49 0.19 0.25 3.80 4.00 1.27 5.80 6.20 0.40 1.27
MAX323/MAX324/MAX325
D A e B
0.101mm 0.004in.
0-8
A1
C
L
A A1 B C E e H L
E
H
SO SMALL OUTLINE PACKAGE (0.150 in.)
DIM PINS D D D 8 14 16
INCHES MILLIMETERS MIN MAX MIN MAX 0.189 0.197 4.80 5.00 0.337 0.344 8.55 8.75 0.386 0.394 9.80 10.00
21-0041A
______________________________________________________________________________________
11
Precision, Single-Supply, SPST Analog Switches MAX323/MAX324/MAX325
___________________________________________Package Information (continued)
DIM A B B2 C E eA e L Q S1 INCHES MAX MIN 0.225 - 0.023 0.014 0.065 0.038 0.015 0.008 0.310 0.220 0.320 0.290 0.100 0.200 0.125 0.070 0.015 - 0.005 MILLIMETERS MIN MAX - 5.72 0.36 0.58 0.97 1.65 0.20 0.38 5.59 7.87 7.37 8.13 2.54 3.18 5.08 0.38 1.78 0.13 -
D A Q e L
E
0-15 C eA
B2 B
S1
Ceramic SB CERAMIC SIDEBRAZE PACKAGE (0.300 in.)
DIM PINS D D D D D D 8 14 16 18 20 24
INCHES MILLIMETERS MIN MAX MIN MAX - 0.550 - 13.97 - 0.785 - 19.94 - 0.840 - 21.34 - 0.960 - 24.38 - 1.060 - 26.92 - 1.280 - 32.51
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) 1997 Maxim Integrated Products Printed USA is a registered trademark of Maxim Integrated Products.

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