General Description
The MAX301/MAX303/MAX305 are precision, dual, high-
speed analog switches. The single-pole single-throw
(SPST) MAX301 and double-pole single-throw (DPST)
MAX305 dualswitches are normally open (NO). The sin-
gle-pole double-throw (SPDT) MAX303 has two NO and
two normally closed (NC) poles. All three parts offer low
on resistance (less than 35Ω), guaranteed to match to
within 2Ωbetween channels and to remain flat over the
full analog signal range (Δ3max). They also offer low leak-
age (less than 250pA at +25°C and less than 6nA at
+85°C) and fast switching (turn-on time less than 150ns
and turn-off time less than 100ns).
The MAX301/MAX303/MAX305 are fabricated with
Maxim’s new improved silicon-gate process for high
system accuracy. Design improvements guarantee
extremely low charge injection (15pC) and low power
consumption (35µW). A 44V maximum breakdown volt-
age allows rail-to-rail analog signal capability.
These monolithic switches operate with a single positive
supply (+10V to +30V) or with split supplies (±4.5V
to ±20V) while retaining CMOS-logic input compatibility
and fast switching. CMOS inputs provide reduced input
loading.
Applications
Features
♦Low On-Resistance < 22Ω Typical (35Ω Max)
♦Guaranteed Matched On-Resistance Between
Channels < 2Ω
♦Guaranteed Flat On-Resistance over Full Analog
Signal Range Δ3Ω Max
♦Guaranteed Charge Injection < 15pC
♦Guaranteed Off-Channel Leakage < 6nA at +85°C
♦Single-Supply Operation (+10V to +30V)
Bipolar-Supply Operation (±4.5V to ±20V)
♦TTL-/CMOS-Logic Compatible
♦Rail-to-Rail Analog Signal Handling Capability
MAX301/MAX303/MAX305
Precision, Dual, High-Speed Analog Switches
________________________________________________________________
Maxim Integrated Products
1
16
15
14
13
12
11
10
9
1
2
3
4
5
6
7
8
NO1
IN1
V-
GND
N.C.
N.C.
N.C.
COM1
TOP VIEW
MAX301
VL
V+
IN2
NO2
COM2
N.C.
N.C.
N.C.
16
15
14
13
12
11
10
9
1
2
3
4
5
6
7
8
NO1
IN1
V-
GND
NC3
COM3
N.C.
COM1
MAX303
VL
V+
IN2
NO2
COM2
N.C.
COM4
NC4
DIP/SO
DIP/SO
16
15
14
13
12
11
10
9
1
2
3
4
5
6
7
8
NO1
IN1
V-
GND
NO3
COM3
N.C.
COM1
MAX305
VL
V+
IN2
NO2
COM2
N.C.
COM4
NO4
DIP/SO
MAX301
LOGIC SWITCH
0
1
OFF
ON
MAX303
LOGIC SWITCHES 1, 2
0
1
OFF
ON
MAX305
LOGIC SWITCH
0
1
OFF
ON
SWITCHES 3, 4
ON
OFF
SWITCHES SHOWN FOR LOGIC "0" INPUT
LCC packages on last page.
Pin Configurations/Block Diagrams/Truth Tables
Ordering Information
19-0159; Rev 1; 2/07
For pricing, delivery, and ordering information, please contact Maxim Direct at 1-888-629-4642,
or visit Maxim’s website at www.maxim-ic.com.
Ordering Information continued on last page.
*
Contact factory for dice specifications.
**
Contact factory for package availability .
Sample-and-Hold Circuits
Test Equipment
Heads-Up Displays
Guidance and Control
Systems
Military Radios
Communication Systems
Battery-Operated Systems
PBX, PABX
PART TEMP RANGE PIN-
PACKAGE
PKG
CODE
MAX301CPE 0°C to +70°C 16 Plastic DIP P16-1
MAX301CSE 0°C to +70°C 16 Narrow SO S16-2
MAX301C JE 0°C to +70°C 16 CERDIP J16-3
MAX301C/D 0°C to +70°C Dice* —
MAX301EPE -40°C to +85°C 16 Plastic DIP P16-1
MAX301ESE -40°C to +85°C 16 Narrow SO S16-2
MAX301EJE -40°C to +85°C 16 CERDIP J16-3
MAX301MJE -55°C to +125°C 16 CERDIP** J16-3
MAX301MLP -55°C to +125°C 20LCC* L20-3
PARAMETER SYMBOL CONDITIONS TEMP MIN TYP MAX UNITS
RANGE (Note 2)
SWITCH
Analog-Signal Range VANA (Note 3) V- V+ V
C, E 20 35
On-Resistance RON
TA= +25°C
M2030
Ω
C, E 55
TA= TMIN to TMAX M45
On-Resistance Match TA= +25°C C, E, M 0.5 2
Between Channels (Note 4) RON TA= TMIN to TMAX C, E, M 3 Ω
On-Resistance Flatness TA= +25°C C, E, M 3
(Note 4) RON TA= TMIN to TMAX C, E, M 5 Ω
NC or NO
C, E -0.50 -0.01 0.50
Off-Leakage Current
NC_(OFF)
TA= +25°C
M -0.25 -0.01 0.25 nA
or C, E -6 6
NO_(OFF) TA= TMIN to TMAX M -20 20
C, E -0.50 -0.01 0.50
COM Off-Leakage Current COMOFF
TA= +25°C
M -0.25 -0.01 0.25 nA
C, E -6 6
TA= TMIN to TMAX M -20 20
C, E -1.0 -0.04 1.0
COM On- COMON
TA= +25°C
M -0.4 -0.04 0.4 nA
Leakage Current C, E -20 20
TA= TMIN to TMAX M -40.0 40.0
ELECTRICAL CHARACTERISTICS
(V+ = 15V, V- = -15V, VL= +5V, GND = 0V, VINH = +2.4V, VINL = +0.8V, TA= TMIN to TMAX, unless otherwise noted.)
MAX301/MAX303/MAX305
Precision, Dual, High-Speed Analog Switches
2 ________________________________________________________________________________________________
ABSOLUTE MAXIMUM RATINGS
Voltage Referenced to V-
V+.......................................................................................44V
GND ...................................................................................25V
VL.................................................................(GND-0.3V) to (V+) +0.3V
NO_, NC_, IN_, COM_ ................(V- - 2V) to (V+ + 2V) or 30mA,
..................................................................whichever occurs first
Continuous Current, COM_, NO_, NC_...............................30mA
Peak Current, COM_, NO_, NC_
(pulsed at 1ms, 10% duty cycle max) ..........................100mA
Continuous Power Dissipation (TA= +70°C) (Note 2)
16-Pin Plastic DIP (derate 10.53mW/°C above +70°C) .....842mW
16-Pin Narrow SO (derate 8.70mW/°C above +70°C) .......696mW
16-Pin CERDIP (derate 10.00mW/°C above +70°C)..........800mW
20-Pin LCC (derate 9.09mW/°C above +70°C)..................727mW
Operating Temperature Ranges:
MAX30_C_ _ .......................................................0°C to +70°C
MAX30_E_ _.....................................................-40°C to +85°C
MAX30_M_ _..................................................-55°C to +125°C
Storage Temperature Range .............................-65°C to +150°C
Lead Temperature (soldering, 10s) .................................+300°C
Note 1: Signals on NO_, NC_, or COM_ beyond V+ or V- are clamped by internal diodes. Limit forward 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.
I(NC or NO) = -10mA,
VCOM_ = ±10V
V+ = 15V, V- = -15V
I(NC or NO) = -10mA,
VCOM_ = ±10V
VINH = 2.4V, VINL = 0.8V
IS= -10mA
VCOM_ = ±5V
V+ = 15V, V- = -15V
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
VCOM_ = ±15.5V,
VNC_ or VNO_ = ±15.5V,
V+ = 16.5V, V- = -16.5V
INPUT
Input Current with IINH
VIN_= 2.4V, all others = 0.8V -1.000 0.005 1.000 µA
Input-Voltage High
Input Current with IINH
VIN_= 0.8V, all others = 2.4V -1.000 0.005 1.000 µA
Input-Voltage Low
SUPPLY
Power-Supply Range ±4.5 ±20 V
Positive Supply Current TA= +25°C -1.00 0.01 1.00
I+
TA= TMIN to TMAX -5.00 5.00
µA
Negative Supply Current I- TA= +25°C -1.00 -0.01 1.00
TA= TMIN to TMAX -5.00 5.00
µA
Logic-Supply Current IL
TA= +25°C -1.00 0.01 1.00
TA= TMIN to TMAX -5.00 5.00
µA
Ground Current IGND
TA= +25°C -1.00 -0.01 1.00
TA= TMIN to TMAX -5.00 5.00
µA
DYNAMIC
Turn-On Time tON Figure1 TA= +25°C 100 150 ns
Turn-Off Time tOFF Figure 1 TA= +25°C 60 100 ns
Break-Before-Make tDMAX303 only, TA= +25°C 10 20 ns
Time Delay (Note 3) Figure 2
CL= 10nF, VGEN = 0V,
Charge Injection Q RGEN = 0Ω,T
A
= +25°C 10 15 pC
(Note 3) Figure 3
Off-Isolation (Note 5) OIRR RL= 100Ω, CL= 5pF, TA= +25°C 72 dB
f = 1MHz, Figure 4
Crosstalk (Note 6) RL= 50Ω, CL= 5pF, TA= +25°C 90 dB
f = 1MHz, Figure 5
Off-Capacitance COF f = 1MHz, Figure 6 TA= +25°C 12 pF
COM Off-Capacitance CCOM(OFF f = 1MHz, Figure 6 TA= +25°C 12 pF
Channel-On Capacitance CCOM(ON) f = 1MHz, Figure 7 TA= +25°C 39 pF
MAX301/MAX303/MAX305
Precision, Dual, High-Speed Analog Switches
_________________________________________________________________________________________________
3
ELECTRICAL CHARACTERISTICS (continued)
(V+ = 15V, V- = -15V, VL= +5V, GND = 0V, VINH = +2.4V, VINL = +0.8V, TA= TMIN to TMAX, unless otherwise noted.)
PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS
(Note 2)
All channels on or off,
VIN = 0V or 5V,
V+ = 16.5V, V- = -16.5V
All channels on or off,
VIN = 0V or 5V,
V+ = 16.5V, V- = -16.5V
All channels on or off,
VIN = 0V or 5V,
V+ = 16.5V, V- = -16.5V
All channels on or off,
VIN = 0V or 5V,
V+ = 16.5V, V- = -16.5V
Note 2: The algebraic convention, where the most negative value is a minimum and the most positive value a maximum, is used on
this data sheet.
Note 3: Guaranteed by design.
Note 4: ∆RON = ∆RONMAX - ∆RONMIN. On resistance match between channels and flatness are guaranteed only with
specified voltages.
Note 5: See Figure 4. Off isolation = 20log10 VCOM/VNC orVNO, VCOM = output, VNC or VNO = input to off switch.
Note 6: Between any two switches. See Figure 5.
MAX301/MAX303/MAX305
4 _______________________________________________________________________________________
Precision, Dual, High-Speed Analog Switches
50
20
-20
ON-RESISTANCE vs. VCOM AND
POWER-SUPPLY VOLTAGE
25
45
MAX301-1
VCOM (V)
RON (Ω)
10
35
30
-10 0 20
40
15
10
5
A: V+ = 5V, V- = -5V
B: V+ = 10V, V- = -10V
C: V+ = 15V, V- = -15V
D: V+ = 20V, V- = -20V A
B
C
D
35
5-20
ON-RESISTANCE vs. VCOM
AND TEMPERATURE
10
30
MAX301-2
VCOM (V)
RON (Ω)
20
20
15
-10 10
25
0
V+ = 15V, V- = -15V
TA = +125°C
TA = +85°C
TA = +25°C
TA = -55°C
140
20 0
ON-RESISTANCE vs. VCOM
WITH V- = 0V
40
120
MAX301-3
VCOM (V)
RON (Ω)
20
80
60
515
100
10
V+ = 5V
V+ = 10V
V+ = 15V V+ = 20V
70
10 0
ON-RESISTANCE vs. VCOM
AND V- = OV
20
60
MAX301-4
VANA (V)
RON (Ω)
20
40
30
515
50
10
V+ = 12V, V- = 0V
TA = +125°C
TA = +85°C
TA = +25°C
60
-60 -20 20
CHARGE INJECTION vs.
ANALOG VOLTAGE
-40
40
MAX301-7
VCOM (V)
Q (pC)
10
0
-20
-10 0
20
V+ = 15V, V- = -15V
100
.0001 -55 125
OFF-LEAKAGE CURRENTS vs.
TEMPERATURE
.001
10
MAX301-5
TEMPERATURE (°C)
OFF LEAKAGE (nA)
.1
.01
25
1
V+ = 16.5V
V- = -16.5V
VCOM = ±15V
VNC OR VNO = ±15V
100
.0001 -55 125
ON-LEAKAGE CURRENTS vs.
TEMPERATURE
.001
10
MAX301-6
TEMPERATURE (°C)
ON LEAKAGE (nA)
.1
.01
25
1
V+ = 16.5V
V- = -16.5V
VCOM = ±15V
VNC OR VNO = ±15V
________________________________________________Typical Operating Characteristics
(TA = +25°C, unless otherwise noted).
100
.0001 -55 125
SUPPLY CURRENT vs.
TEMPERATURE
.001
10
MAX301-8
TEMPERATURE (°C)
I+, I-, IL (µA)
.1
.01
25
1I+ AT V+ = 16.5V
I- AT V- = -16.5V
IL AT VL = 5V
MAX301/MAX303/MAX305
________________________________________________________________________________________ 5
Precision, Dual, High-Speed Analog Switches
____________________Pin Descriptions __________Applications Information
Operation with Supply Voltages
Other than ±15V
The MAX301/MAX303/MAX305 switches operate with
±4.5V to ±20V bipolar supplies and a +10V to +30V sin-
gle supply. In either case, analog signals ranging from V+
to V- can be switched. The
Typical Operating
Characteristics
graphs show the typical on-resistance
variation with analog signal and supply voltage. The usual
on-resistance temperature coefficent is 0.5%/°C (typ).
Logic Inputs
The MAX301/MAX303/MAX305 operate with a single pos-
itive supply or with bipolar supplies. The devices maintain
TTL compatibility with supplies anywhere in the ±4.5V to
±20V range as long as VL= +5V. If VLis connected to V+
or another supply at voltages other than +5V, the devices
will operate at CMOS-logic level inputs.
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 rat-
ings 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
for overvoltage protection (Figure 1). Adding diodes
reduces the analog signal range to 1V below V+ and 1V
below V-, but low switch resistance and low leakage char-
acteristics are unaffected. Device operation is
unchanged, and the difference between V+ to V- should
not exceed +44V.
DIP/SO NAME FUNCTION
1, 8 COM1,
COM2 Drain (Analog Signal)
2-7 N.C. Not internally connected
9, 16 NC1,
NC2 Source (Analog Signal)
10, 15 IN2, IN1 Digital Logic Inputs
11 V+
Positive Supply-Voltage
Input—connected to
substrate
12 VLLogic Supply-Voltage Input
13 GND
Negative Supply Voltage
Input
14 V-
2, 10
1, 3-9, 11,
16
5, 7, 12,
20
13, 19
14
15
17
18
Ground
LCC NAME FUNCTION
1, 8, 3, 6 2, 4, 8, 10 COM_ Drain (Analog Signal)
2-7 1, 3, 6, 9,
11, 16 N.C. Not internally connected
11 14 V+
Positive Supply-Voltage
Input—connected to
substrate
12 15 VLLogic Supply-Voltage Input
13 17 GND Ground
14 18 V- Negative Supply Voltage
Input
15, 10 19, 13 IN1, IN2 Digital Logic Inputs
16, 9, 5, 4 5, 7, 12,
20
NC_,
NO_ Source (Analog Signal)
LCC NAME FUNCTION
1, 8, 3, 6 2, 4, 8, 10 COM_ Drain (Analog Signal)
2-7 1, 3, 6, 9,
11, 16 N.C. Not internally connected
11 14 V+
Positive Supply-Voltage
Input—connected to
substrate
12 15 VLLogic Supply-Voltage Input
13 17 GND Ground
14 18 V- Negative Supply Voltage
15, 10 19, 13 IN1, IN2 Digital Logic Inputs
16, 9, 5, 4 5, 7, 12,
20 NO_ Source (Analog Signal)
Vg
NO_
V+
COM_
V-
Figure 1. Overvoltage Protection Using Blocking Diodes
MAX301 PIN
LCC
MAX303 PIN
DIP/SO
MAX305 PIN
DIP/SO
MAX301/MAX303/MAX305
6 _______________________________________________________________________________________
Precision, Dual, High-Speed Analog Switches
50%
tOFF
tr < 20ns
tf < 20ns
VO
VO
tON 0.9VO
0.9VO
+3V
0V
VCOM
0V
-VANA
LOGIC
INPUT
SWITCH
INPUT
SWITCH
OUTPUT
SWITCH
INPUT LOGIC INPUT WAVEFORM IS INVERTED FOR
SWITCHES THAT HAVE THE OPPOSITE LOGIC
SENSE CONTROL
+5V +15V
V+
VO
RL = 1000Ω
CL = 35pF
V-
-15V
REPEAT TEST FOR EACH SWITCH
0V
GND
LOGIC
INPUT
SWITCH
INPUT
IN1
VCOM = +10V
for tON
VCOM = -10V
for tOFF
FOR LOAD CONDITIONS, SEE
Electrical Characteristics.
CL INCLUDES FIXTURE AND STRAY CAPACITANCE
VO = VCOM RL
RL = RON
V+VL
COM NC
OR NO
V-
50%
VO1
VO2
0.9VO
+3V
0V
VCOM
0V
VCOM
LOGIC
INPUT
SWITCH
OUTPUT
SWITCH
OUTPUT
+5V
VL
+15V
V+
NO
V-
-15V
CL INCLUDES FIXTURE AND STRAY CAPACITANCE.
LOGIC 0 INPUT.
0V
GND
LOGIC
INPUT
VCOM_ = +10V
VCOM_ = +10V
0V
0.9VO
tDtD
IN_ RL2
NC_
CL2
VO2 RL1
VO1
CL1
RL = 1000Ω
CL = 35pF
COM_
COM_
VGEN GND
NC OR NO
CL
10nF
VO
0V -15V
V-
VLV+
RGEN
VO
INX ON OFF ON
∆VO
Q = (∆VO)(CL)
COM
+5V +15V
Figure 2. Switching-Time Test Circuit
Figure 3. Break-Before-Make Test Circuit
Figure 4. Charge-Injection Test Circuit
MAX301/MAX303/MAX305
_______________________________________________________________________________________ 7
Precision, Dual, High-Speed Analog Switches
IN_ 0V, 2.4V
SIGNAL
GENERATOR
+15V +5V
CC
V+ VL
ANALYZER
CH A
CH B
NC OR NO
RL
100Ω
GND
VCOM
C
-15V C = 5pF
FREQUENCY
TESTED
1 MHz
SIGNAL
GENERATOR
AUTOMATIC
SYNTHESIZER
ANALYZER
TRACKING
SPECTRUM
ANALYZER
OFF ISOLATION = 20LOG VCOM
VNC OR VNO
V-
IN2 0V, 2.4V
SIGNAL
GENERATOR
+15V +5V
CC
V+
V
ANALYZER
CH A
CH B
NC OR NO
RL
100Ω
GND
COM
C
V-
-15V C = 5pF
FREQUENCY
TESTED
1 MHz
SIGNAL
GENERATOR
AUTOMATIC
SYNTHESIZER
ANALYZER
TRACKING
SPECTRUM
ANALYZER
0V, 2.4V IN_
NC OR NO
50Ω
V+
COM
VL
CAPACITANCE
METER NC OR NO
COM
GND C
V-
-15V
IN_ 0V, 2.4V
CC +15V
V+ +5V
V+ VL
Figure 5. Off Isolation
Figure 6. Crosstalk Test Circuit
Figure 7. Channel On-Capacitance
V-
CAPACITANCE
METER
COM_
GND C
-15V
IN_ 0V, 2.4V
CC +15V +5V
V+ VL
Figure 8. Channel Off-Capacitance
MAX301/MAX303/MAX305
Precision, Dual, High-Speed Analog Switches
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
© 2007 Maxim Integrated Products is a registered trademark of Maxim Integrated Products, Inc.
Ordering Information (continued)
PART TEMP RANGE PIN-
PACKAGE
PKG
CODE
MAX303CPE 0°C to +70°C 16 Plastic DIP P16-1
MAX303CSE 0°C to +70°C 16 Narrow SO S16-2
MAX303C JE 0°C to +70°C 16 CERDIP J16-3
MAX303C/D 0°C to +70°C Dice* —
MAX303EPE -40°C to +85°C 16 Plastic DIP P16-1
MAX303ESE -40°C to +85°C 16 Narrow SO S16-2
MAX303EJE -40°C to +85°C 16 CERDIP J16-3
MAX303MJE -55°C to +125°C 16 CERDIP J16-3
MAX303MLP -55°C to +125°C 20LCC* L20-3
MAX305CPE 0°C to +70°C 16 Plastic DIP P16-1
MAX305CSE 0°C to +70°C 16 Narrow SO S16-2
MAX305C JE 0°C to +70°C 16 CERDIP J16-3
MAX305C/D 0°C to +70°C Dice* —
MAX305EPE -40°C to +85°C 16 Plastic DIP P16-1
MAX305ESE -40°C to +85°C 16 Narrow SO S16-2
MAX305EJE -40°C to +85°C 16 CERDIP J16-3
MAX305MJE -55°C to +125°C 16 CERDIP J16-3
MAX305MLP -55°C to +125°C 20LCC* L20-3
Pin Configurations (continued)
MAX301
MAX303
14
15
16
17
184
5
6
7
8
3
2
1
20
19
9
10
11
12
13
COM3
NC3
N.C.
NC4
COM4
V-
GND
N.C.
VL
V+
N.C.
COM1
N.C.
NO1
IN1
N.C.
COM2
N.C.
NO2
IN2
14
15
16
17
184
5
6
7
8
3
2
1
20
19
9
10
11
12
13
N.C.
N.C.
N.C.
TOP VIEW
N.C.
N.C.
V-
GND
N.C.
VL
V+
N.C.
COM1
N.C.
NC1
IN1
N.C.
COM2
N.C.
NC2
IN2
MAX305
14
15
16
17
184
5
6
7
8
3
2
1
20
19
9
10
11
12
13
COM3
NO3
N.C.
NO4
COM4
V-
GND
N.C.
VL
V+
N.C.
COM1
N.C.
NO1
IN1
N.C.
COM2
N.C.
NO2
IN2
*
Dice are tested at T
A
= +25°C only.
**
Contact factory for availability.
Revision History
Pages changed at Rev 1: 1, 7, 8
