_______________General Description
The MAX333A is a precision, quad, single-pole double-
throw (SPDT) analog switch. The four independent
switches operate with bipolar supplies ranging from
±4.5V to ±20V, or with a single-ended supply between
+10V and +30V. The MAX333A offers low on resistance
(less than 35Ω), guaranteed to match within 2Ωbetween
channels and to remain flat over the analog signal range
(∆3Ωmax). It also offers break-before-make switching
(10ns typical), with turn-off times less than 145ns and
turn-on times less than 175ns. The MAX333A is ideal for
portable operation since quiescent current runs less
than 50µA with all inputs high or low.
This monolithic, quad switch is fabricated with Maxim’s
new improved silicon-gate process. Design improvements
guarantee extremely low charge injection (10pC), low
power consumption (3.75mW), and electrostatic discharge
(ESD) greater than 2000V.
Logic inputs are TTL and CMOS compatible and guaranteed
over a +0.8V to +2.4V range—regardless of supply voltage.
Logic inputs and switched analog signals can range any-
where between the supply voltages without damage.
________________________Applications
Test Equipment
Communications Systems
PBX, PABX
Heads-Up Displays
Portable Instruments
____________________________Features
♦Upgraded Replacement for a DG211/DG212 Pair
or Two DG403s
♦Low On Resistance < 17ΩTypical (35ΩMax)
♦Guaranteed Matched On Resistance Between
Channels < 2Ω
♦Guaranteed Flat On Resistance over Analog
Signal Range ∆3ΩMax
♦Guaranteed Charge Injection < 10pC
♦Guaranteed Off-Channel Leakage < 6nA at +85°C
♦ESD Guaranteed > 2000V per Method 3015.7
♦Single-Supply Operation (+10V to +30V)
Bipolar-Supply Operation (±4.5V to ±20V)
♦TTL-/CMOS-Logic Compatibility
♦Rail-to-Rail Analog Signal Handling Capability
______________Ordering Information
* Contact factory for dice specifications.
MAX333A
Precision, Quad, SPDT, CMOS Analog Switch
________________________________________________________________
Maxim Integrated Products
1
INPUTS
V1
V2
OSC
IN
V3
V4
FLYING CAPACITOR
LEVEL TRANSLATOR
(2-CHANNEL)
OUTPUTS
V1 - V2
V3 - V4
__________Typical Operating Circuit
SWITCHES ARE SHOWN WITH LOGIC "0" INPUT
N.C. = NOT INTERNALLY CONNECTED
20
19
18
17
16
15
14
13
12
11
1
2
3
4
5
6
7
8
9
10
IN4
NO4
COM4
NC4
NC1
COM1
NO1
IN1
MAX333A
V+
N.C.
NC3
COM3
COM2
NC2
GND
V-
NO3
IN3
IN2
NO2
TOP VIEW
DIP/SO/TSSOP
__________________Pin Configuration
PART TEMP. RANGE PIN-PACKAGE
MAX333ACPP 0°C to +70°C 20 Plastic DIP
MAX333ACWP 0°C to +70°C 20 Wide SO
MAX333ACUP 0°C to +70°C 20 TSSOP
MAX333AEPP -40°C to +85°C 20 Plastic DIP
MAX333AEWP -40°C to +85°C 20 Wide SO
MAX333AEUP -40°C to +85°C 20 TSSOP
19-0189; Rev 1; 6/99
MAX333AC/D 0°C to +70°C Dice*
MAX333AMJP -55°C to +125°C 20 CERDIP
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.
MAX333A
Precision, Quad, SPDT, CMOS Analog Switch
2 _______________________________________________________________________________________
ABSOLUTE MAXIMUM RATINGS
V+ to V- ..................................................................................44V
VIN, VCOM, VNO, VNC ......................................................V- to V+
(VNO - VNC) ............................................................................32V
V+ to Ground..........................................................................30V
V- to Ground..........................................................................-30V
Current, Any Terminal Except VCOM, VNO, or VNC.............30mA
Continuous Current, VCOM, VNO, or VNC............................20mA
Peak Current, VCOM, VNO, or VNC
(Pulsed at 1ms, 10% duty cycle max) ............................70mA
ESD ....................................................................................2000V
Continuous Power Dissipation (TA = +70°C) (Note 1)
Plastic DIP (derate above +70°C by 11.11mW/°C) .....889mW
SO (derate above +70°C by 10.00mW/°C)..................800mW
CERDIP (derate above +70°C by 11.11mW/°C)..........889mW
TSSOP (derate above +70°C by 7mW/°C) ..................559mW
Operating Temperature Ranges:
MAX333AC_ _ .....................................................0°C to +70°C
MAX333AE_ _ ..................................................-40°C to +85°C
MAX333AMJP................................................-55°C to +125°C
Storage Temperature Range .............................-65°C to +150°C
Lead Temperature (soldering, 10sec) .............................+300°C
ELECTRICAL CHARACTERISTICS—Dual Supplies
(GND = 0V, V+ = +15V, V- = -15V, TA= +25°C, unless otherwise noted.)
Note 1: Device mounted with all leads soldered to PC board.
Stresses beyond those listed under “Absolute Maximum Ratings” may cause permanent damage to the device. These are stress ratings only, and function-
al 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.
PARAMETER SYMBOL MIN TYP MAX
(Notes 2, 3) UNITS
Input Voltage Low VIL V- 0.8 V
Negative Supply Current I- 0.01 1 µA
V+ 10 30
Input Voltage High VIH 2.4 V+ V
Input Current IIN -1.0 0.0001 1.0 µA
Analog Signal Range VCOM, VNO, VNC V- V+ V
Positive Supply Current I+ 0.05 0.25 mA
Supply Voltage Range V+/V- ±4.5V ±20 V
On Circuit Resistance RON 20 35 Ω
On Resistance Match
Between Channels (Note 4) RON Ω
On Resistance Flatness
(Note 4) RON I(NC or NO) = -10mA, VD= 5V
or -5V, V+ =15V, V- = -15V Ω
On Circuit Leakage
Current ICOM -0.75 0.75 nA
Off Circuit Leakage
Current
INC or
INO
-0.25 0.01 0.25 nA
Turn-Off Time tOFF 145 ns
Turn-On Time tON 175 ns
Break-Before-Make Time tOPEN 10 ns
Off Capacitance COFF 5 pF
On Capacitance CON 5 pF
Charge Injection Q 210pC
OIRR 72 dB
CONDITIONS
VIN = 0V/5V,V+ = 16.5V, V- = -16.5V
Single supply, V- = GND
VIN = V-, V+
Figure 1
VIN = 0V/5V,V+ = 16.5V, V- = -16.5V
Dual supply, V+= V-
CL= 10nF, VGEN = 0V,
RGEN = 0Ω, Figure 6
f = 1MHz, RL = 75Ω,
VCOM = 2.3VRMS
CCRR 78 dB
VCOM = +10V, I(NC or NO) = 1mA;
VCOM = -10V, I(NC or NO) = 1mA
2TA= +25°C
3
M
TA= +25°C
VCOM = ±15.5V, VNC or VNO = +15.5V,
V+ = 16.5V, V- = -16.5V
VCOM = ±15.5V VNC or VNO = +15.5V,
V+ = 16.5V, V- = -16.5V
M
M
TA= TMIN to TMAX
TA= TMIN to TMAX
C, E
C, E
C, E
TA= +25°C
45
4
5
-1.00 0.20 1.00
-0.50 0.02 0.05
Off Isolation
Crosstalk
I(NC or NO) = -10mA, VD= 10V
or -10V, V+ =15V, V- = -15V
POWER REQUIREMENTS
LOGIC INPUT
SWITCH
DYNAMIC
MAX333A
Precision, Quad, SPDT, CMOS Analog Switch
_______________________________________________________________________________________ 3
ELECTRICAL CHARACTERISTICS–DUAL SUPPLIES (continued)
(GND = 0V, V+ = +15V, V- = -15V, TA= TMIN to TMAX, unless otherwise noted.)
ELECTRICAL CHARACTERISTICS—Single Supply
(GND = 0V, V+ = +12V, V- = 0V, TA = +25°C, unless otherwise noted.)
PARAMETER SYMBOL MIN TYP MAX
(Notes 2, 3) UNITS
On Circuit Resistance RON 45 Ω
Analog Signal Range VCOM V- V+ V
Input Current IIN -1.0 0.0001 1.0 µA
On Circuit Leakage Current ICOM -10 10 nA
On Circuit Leakage Current INC or INO -6 6 nA
Input Voltage Low VIL V- 0.8 V
Input Voltage High VIH 2.4 V+ V
CONDITIONS
VIN = V-, V+
PARAMETER
Off Circuit Leakage Current
SYMBOL MIN TYP MAX
(Notes 2, 3)
INC or
INO 0.25
UNITS
Input Current IIN
nA
1 µA
Input Voltage High VINHI 2.4 V+ V
Input Voltage Low VINLO 0 0.8 V
Turn-Off Time
Analog Signal Range VCOM,
VNO, VNC V- V+ V
tOFF 45 ns
Turn-On Time
On Circuit Resistance
tON
rON 35 75
90
Ω
On Circuit Leakage Current
ns
ICOM 0.75 nA
Break-Before-Make Time tOPEN 510 ns
Off Isolation
Supply Voltage Range
OIRR 70 dB
Crosstalk CCRR 72 dB
V+10 30 V
Positive Supply Current l+ 0.25 mA
CONDITIONS
VCOM = 11V
VNC or VNO = 1V
VIN = V+, 0V
Figure 1
VCOM = 10V, I(NC or NO) = 1mA,
VCOM = 1V, I(NC or NO) = 1mA
VCOM = 11V, VNC or VNO = 0V
VCOM = 1V, VNC or VNO = V+
f = 1MHz, RL= 75Ω, VCOM = 2.3VRMS
Single supply, V- = GND
VCOM = 10V, I(NC or NO) = 1mA;
VCOM = -10V, I(NC or NO = 1mA
VCOM = ±15V, VNC or VNO = -15V,
V+ = 16.5V, V- = -16.5V
VCOM = ±15V, VNC or VNO = -15V,
V+ = 16.5V, V- = -16.5V
C, E
C, E
C, E
M
M
M
45
-60 60
Note 2: The algebraic convention, whereby the most negative value is a minimum and the most positive is a maximum, is used in
this data sheet.
Note 3: Typical values are for design aid only, not guaranteed or subject to production testing.
Note 4: On resistance match between channels and flatness are guaranteed only with bipolar-supply operation.
LOGIC INPUT
SWITCH
DYNAMIC
SWITCH
INPUT
SUPPLY
MAX333A
Precision, Quad, SPDT, CMOS Analog Switch
4 _______________________________________________________________________________________
__________________________________________Typical Operating Characteristics
(TA = +25°C, unless otherwise noted).
45
5
-20 -10 10
ON RESISTANCE
vs. VCOM AND POWER SUPPLY VOLTAGE
15
35
MAX333A-01
VCOM (V)
RON (Ω)
020
25
40
10
30
20
50
A
BC
D
A: V+ = 5V,
V- = -5V
B: V+ = 10V,
V- = -10V
C: V+ = 15V,
V- = -15V
D: V+ = 20V,
V- = -20V
5
-20 -10 10
ON RESISTANCE
vs. VCOM AND TEMPERATURE
30
MAX333A-02
VCOM (V)
RON (Ω)
020
20
10
25
15
35
V+ = 15V
V- = -15V TA = +125°C
+85°C
+25°C
-55°C
20
05 15
ON RESISTANCE
vs. VCOM AND TEMPERATURE
120
MAX333A-03
VCOM (V)
RON (Ω)
10 20
80
40
100
60
140
V- = 0V
V+ = 5V
V+ = 10V
V+ = 15V
V+ = 20V
10
05 15
ON RESISTANCE
vs. VCOM AND SINGLE SUPPLY
60
MAX333A-04
VCOM (V)
RON (Ω )
10 20
40
20
50
30
70
V+ = 12V
V- = 0V
TA = +125°C
TA = +85°C
TA = +25°C
-75
-20
CHARGE INJECTION vs. VCOM
50
MAX333A-07
VCOM (V)
Q (pC)
020
0
-50
25
-25
75
-15 -10 -5 5 10 15
VSUPPLY = +15V
0.0001
-55
OFF LEAKAGE CURRENTS
vs. TEMPERATURE
10
MAX333A-05
TEMPERATURE (°C)
OFF LEAKAGE
+25 +125
0.1
0.001
1
0.01
100
V+ = 16.5V
V- = -16.5V
VCOM = ±15V
VNC OR VNO = ±15V
0.0001
-55
ON LEAKAGE CURRENTS
vs. TEMPERATURE
10
MAX333A-06
TEMPERATURE (°C)
ON LEAKAGE
+25 +125
0.1
0.001
1
0.01
100 V+ = 16.5V
V- = -16.5V
VCOM = ±15V
VNC OR VNO = ±15V
0.0001
-55
SUPPLY CURRENT vs. TEMPERATURE
10
MAX333A-08
TEMPERATURE (°C)
I+, I-, IL (µA)
+25 +125
0.1
0.001
1
0.01
100
I+ AT V+ = +16.5V
I- AT V+ = +16.5V
__________Applications Information
Operation with Supply Voltages
Other than ±15V
o
The main limitation of supply voltages other than ±15V is
a reduction in the analog signal range. The MAX333A
operates with ±5V to ±20V bipolar supplies. The
Typical Operating Characteristics
and graphs show typ-
ical on resistance for ±15V, ±10V, ±5 supplies.
Switching times increase by a factor of two or more for
±5V operation. The MAX333A can operate from +10V
to +24V unipolar supplies. It can be powered from a
single +10V to +24V supply, as well as from unbalanced
supplies such as +24V and -5V. Connect V- to 0V when
operating with a single supply.
Overvoltage Protection
Proper power-supply sequencing is recommended for
all CMOS devices. It is important not to exceed the
absolute maximum ratings because stresses beyond
the listed ratings may cause permanent damage to the
devices. Always sequence V+ on first, followed by VL,
V-, and logic inputs. If power-supply sequencing is not
possible, add two small signal diodes in series with the
supply pins (Figure 1). Adding the diodes reduces the
analog signal range to 1V below V+ and 1V below V-,
but low switch resistance and low leakage characteris-
tics are unaffected.
MAX333A
Precision, Quad, SPDT, CMOS Analog Switch
_______________________________________________________________________________________ 5
PIN FUNCTION
15 Not Internally Connected
6 Ground
5 Negative Power Supply
4, 7, 14, 17 Normally Closed Switches
16 Positive Power Supply
1, 10, 11, 20 Logic-Level Inputs
2, 9, 12, 19 Normally Open Switches
3, 8, 13, 18 Common Switch Poles
NAME
N.C.
GND
V-
NC1-NC4
V+
IN1-IN4
NO1-NO4
COM1-COM4
_____________________Pin Description
tR < 20ns
tF < 20ns
50%
0V
+10V
LOGIC
INPUT
V-
-15V
300Ω
COM_
GND
(REPEAT TEST FOR IN2, IN3, AND IN4.)
VIN
+10V
IN_
NO_
50%
tOPEN
50% 50%
50% 50%
3V
tOPEN
tON
tOFF
tON
tOFF
0V
-10V
VCOM
+15V
V+
NC_
-10V
SWITCH OUTPUT
Figure 2. Switching-Time Test Circuit
Vg
NO_
( OR NC_)
V+
COM_
V-
Figure 1. Overvoltage Protection Using Blocking Diodes
______________________________________________Test Circuits/Timing Diagrams
MAX333A
Precision, Quad, SPDT, CMOS Analog Switch
6 _______________________________________________________________________________________
CAPACITANCE
METER NO_
OR NC_
COM_
GND C
V-
-15V
IN_ 0V, 2.4V
C
+15V
V+
50%
VO1
VO2
0.9VO
+3V
0V
VCOM
0V
VCOM
LOGIC
INPUT
SWITCH
OUTPUT
SWITCH
OUTPUT
+15V
V+
NO
V-
-15V
CL INCLUDES FIXTURE AND STRAY CAPACITANCE.
LOGIC 0 INPUT.
GND
LOGIC
INPUT
0V
0.9VO
tDtD
RL2
NC
CL2
VO2
VO1
CL1
RL = 1000Ω
CL = 35pF
COM_
VCOM RL1
IN_
VGEN GND
NC OR NO
CL
10nF
VO
-15V
V-
V+
RGEN
VO
IN_ ON OFF ON
∆VO
Q = (∆VO)(CL)
COM_
+15V
IN_
Figure 3. Channel-Off Capacitance
Figure 5. Break-Before-Make
Figure 6. Charge Injection
CAPACITANCE
METER NO
OR NC
COM_
GND C
V-
-15V
IN_
0V,
2.4V
C
+15V
V+
Figure 4. Channel-On Capacitance
______________________________________________Test Circuits/Timing Diagrams
MAX333A
Precision, Quad, SPDT, CMOS Analog Switch
_______________________________________________________________________________________ 7
IN1 0V, 2.4V
SIGNAL
GENERATOR
+15V
C
ANALYZER
CH A
CH B
NC1 OR NO1
RL
100Ω
GND
COM_
C
V-
-15V
REPEAT TESTS FOR OTHER CHANNELS
FREQUENCY
TESTED
1 MHz
SIGNAL
GENERATOR
AUTOMATIC
SYNTHESIZER
ANALYZER
TRACKING
SPECTRUM
ANALYZER
0V, 2.4V IN_
NC_ OR NO_ 50Ω
V+
COM1
IN_
0V,
2.4V
SIGNAL
GENERATOR
+15V
C
V+
ANALYZER
CH A
CH B
NC_
OR NO_
RL
100Ω
GND
COM_
C
-15V
C = 5pF
FREQUENCY
TESTED
1 MHz
SIGNAL
GENERATOR
AUTOMATIC
SYNTHESIZER
ANALYZER
TRACKING
SPECTRUM
ANALYZER
OFF ISOLATION = 20LOG VCOM
VNC OR VNO
V-
Figure 7. Off-Isolation
Figure 8. Crosstalk
_________________________________Test Circuits/Timing Diagrams (continued)
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.
8
___________________Maxim Integrated Products, 120 San Gabriel Drive, Sunnyvale, CA 94086 (408) 737-7600
© 1999 Maxim Integrated Products Printed USA is a registered trademark of Maxim Integrated Products.
MAX333A
Precision, Quad, SPDT, CMOS Analog Switch
___________________Chip Topography
NO2
COM3
NC3
V+
NC4
NO3 IN3 IN2
NO4
COM4
0.139"
(3.53mm)
COM2
NC2
GND
V-
NC1
COM1
0.101"
(2.57mm)
IN4 IN1 NO1
TRANSISTOR COUNT: 145;
SUBSTRATE CONNECTED TO V+.
