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19-2116; Rev 0; 7/01
0.8, Low-Voltage, Single-Supply Dual SPST Analog Switches
General Description
The MAX4741/MAX4742/MAX4743 are low on-resistance, low-voltage, dual single-pole/single-throw (SPST) analog switches that operate from a single +1.6V to +3.6V supply. These devices have fast switching speeds (tON = 24ns, tOFF = 16ns max), handle Rail-toRail(R) analog signals, and consume less than 1W of quiescent power. The MAX4743 has break-beforemake switching. When powered from a +3V supply, the MAX4741/ MAX4742/MAX4743 feature low 0.8 (max) on-resistance (R ON ), with 0.08 (max) R ON matching and 0.18 R ON flatness. The digital logic input is 1.8V CMOS compatible when using a single +3V supply. The MAX4741 has two normally open (NO) switches, the MAX4742 has two normally closed (NC) switches, and the MAX4743 has one NO switch and one NC switch. The MAX4741/MAX4742/MAX4743 are available in 8-pin SOT23 and 8-pin MAX packages. o Low RON: 0.8 max (+3V Supply) 2.5 max (+1.8V Supply) o 0.18 max RON Flatness (+3V Supply) o +1.6V to +3.6V Single-Supply Operation o Available in SOT23 and MAX Packages o High-Current Handling Capacity (150mA continuous) o 1.8V CMOS Logic Compatible (+3V Supply) o Fast Switching: tON = 24ns, tOFF = 16ns
Features
MAX4741/MAX4742/MAX4743
Ordering Information
PART MAX4741EKA MAX4741EUA MAX4742EKA MAX4742EUA MAX4743EKA MAX4743EUA TEMP. RANGE -40C to +85C -40C to +85C -40C to +85C -40C to +85C -40C to +85C -40C to +85C PINPACKAGE 8 SOT23-8 8 MAX 8 SOT23-8 8 MAX 8 SOT23-8 8 MAX TOP MARK AAIY -- AAIZ -- AAJA --
Applications
Power Routing Battery Powered Systems Audio and Video Signal Routing Low-Voltage Data-Acquisition Systems Communications Circuits PCMCIA Cards Cellular Phones Modems Hard Drives
Pin Configurations
TOP VIEW
MAX4741 MAX4742
NO1 COM1 IN2 GND
1 2 3 4
8 7 6 5
V+ IN1 COM2 NO2
NC1 COM1 IN2 GND
1 2 3 4
8 7 6 5
V+ IN1 COM2 NC2
NO1 COM1 IN2 GND
1 2 3 4
MAX4743
8 7 6 5
V+ IN1 COM2 NC2
MAX SOT23-8 Pin Configurations continued at end of data sheet. Rail-to-Rail is a registered trademark of Nippon Motorola, Inc.
MAX
MAX
________________________________________________________________ Maxim Integrated Products
1
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0.8, Low-Voltage, Single-Supply Dual SPST Analog Switches MAX4741/MAX4742/MAX4743
ABSOLUTE MAXIMUM RATINGS
Voltages Referenced to GND V+, IN_......................................................................-0.3V to +4V COM_, NO_, NC_ (Note 1) ...........................-0.3V to (V+ + 0.3V) Continuous Current COM_ , NO_, NC_ .........................150mA Peak Current COM_, NO_, NC_ (pulsed at 1ms 10% duty cycle)..................................300mA Continuous Power Dissipation (TA = +70C) 8-Pin SOT23 (derate 7.52mW/C above +70C)...........602mW 8-Pin MAX (derate 4.5mW/C above +70C) ..............362mW Operating Temperature Range ...........................-40C to +85C Maximum Junction Temperature .....................................+150C Storage Temperature Range .............................-65C to +150C Lead Temperature (soldering, 10s) .................................+300C
Note 1: Signals on COM_, NO_, or NC_ exceeding V+ or GND 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.
ELECTRICAL CHARACTERISTICS--Single +3V Supply
(V+ = +2.7V to +3.6V, VIH = +1.4V, VIL = +0.5V, TA = TMIN to TMAX, unless otherwise specified. Typical values are at V+ = +3.0V, TA = +25C.) (Notes 2, 3)
PARAMETER ANALOG SWITCH Analog Signal Range VCOM_, VNO_, VNC_ V+ = 2.7V, ICOM_ = 100mA, VNO_ or VNC_ = 1.5V V+ = 2.7V, ICOM_ = 100mA, VNO_ or VNC_ = 1.5V V+ = 2.7V, ICOM_ = 100mA, VNO_ or VNC_ = 1V, 1.5V, 2V V+ = 3.3V, VCOM_ = 0.3V, 3V, VNO_ or VNC_ = 3V, 0.3V V+ = 3.3V, VCOM_ = 0.3V, 3V VNO_ or VNC_ = 3V, 0.3V or floating V+ = 3.3V, VCOM_ = 3V, 0.3V; VNO_ or VNC_ = 3V, 0.3V or floating +25C TMIN to TMAX +25C TMIN to TMAX +25C TMIN to TMAX +25C TMIN to TMAX +25C TMIN to TMAX +25C TMIN to TMAX -1 -5 -1 -5 -2 -10 0.05 0.05 0 V+ V SYMBOL CONDITIONS TA MIN TYP MAX UNITS
0.5
0.8 0.9 0.08 0.09 0.18 0.20 1 nA 5 1 nA 5 2 nA 10
On-Resistance
RON
On-Resistance Match Between Channels (Note 4)
RON
On-Resistance Flatness (Note 5)
RFLAT(ON)
NO_ or NC_ Off-Leakage Current
INO_(OFF), INC_(OFF)
COM_ Off-Leakage Current
ICOM_(OFF)
COM_ On-Leakage Current
ICOM_(ON)
2
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0.8, Low-Voltage, Single-Supply Dual SPST Analog Switches
ELECTRICAL CHARACTERISTICS--Single +3V Supply (continued)
(V+ = +2.7V to +3.6V, VIH = +1.4V, VIL = +0.5V, TA = TMIN to TMAX, unless otherwise specified. Typical values are at V+ = +3.0V, TA = +25C.) (Notes 2, 3)
PARAMETER SYMBOL CONDITIONS TA MIN TYP MAX UNITS
MAX4741/MAX4742/MAX4743
SWITCH DYNAMIC CHARACTERISTICS VNO_, VNC_ = 1.5V, RL = 50, CL = 35pF, Figure 1 VNO_, VNC_ = 1.5V, RL = 50, CL = 35pF, Figure 1 VNO_, VNC_ = 1.5V, RL = 50, CL = 35pF, Figure 1 (MAX4743) VGEN = 0, RGEN = 0, CL = 1.0nF, Figure 3 f = 1MHz, Figure 4 f = 1MHz, Figure 4 f = 1MHz, Figure 4 Signal = 0, RIN = ROUT = 50, CL = 5pF, Figure 2 f = 1MHz, VCOM_ = 1VRMS, RL = 50, CL = 5pF, Figure 2 f = 1MHz, VCOM_ = 1VRMS, RL = 50, CL = 5pF, Figure 2 THD f = 20Hz to 20kHz, VCOM_ = 2Vp-p, RL = 32 +25C +25C +25C +25C TMIN to TMAX +25C TMIN to TMAX +25C TMIN to TMAX +25C +25C +25C +25C 1 28 32 32 44 100 -55 -110 0.02 pC pF pF pF MHz dB dB % 6 ns 12 18 24 ns 28 16 ns 18
Turn-On Time
tON
Turn-Off Time
tOFF
Break-Before-Make (Note 6)
tBBM
Charge Injection NO_ or NC_ OffCapacitance COM_ Off-Capacitance COM_ On-Capacitance -3dB On-Channel Bandwidth Off-Isolation (Note 7) Crosstalk (Note 8) Total Harmonic Distortion LOGIC INPUT Input Logic High Input Logic Low Input Leakage Current POWER SUPPLY Power-Supply Range Positive Supply Current
Q COFF CCOM_(OFF) CCOM_(ON) BW VISO
VIH VIL IIN V+ I+ V+ = 3.6V, VIN_ = 0 or V+, all channels on or off +25C VIN_ = 0 or V+
1.4 0.5 -1 1.6 0.005 1 3.6 0.2
V V A V A
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0.8, Low-Voltage, Single-Supply Dual SPST Analog Switches MAX4741/MAX4742/MAX4743
ELECTRICAL CHARACTERISTICS--Single +1.8V Supply
(V+ = +1.8V, VIH = +1.0V, VIL = 0.4V, TA = TMIN to TMAX, unless otherwise specified. Typical values are at TA = +25C.) (Notes 2, 3)
PARAMETER ANALOG SWITCH Analog Signal Range VCOM_, VNO_, VNC_ RON INO_(OFF), INC_(OFF) ICOM_ = 10mA, VNO_ or VNC_ = 0.9V VCOM_ = 0.3V, 1.5V; VNO_ or VNC_ = 1.5V, 0.3V VCOM_ = 0.3V, 1.5V; VNO_ or VNC_ = 1.5V, 0.3V VCOM_ = 0.3V, 1.5V, VNO_ or VNC_ = 0.3V, 1.5V, or floating +25C TMIN to TMAX +25C TMIN to TMAX +25C TMIN to TMAX +25C TMIN to TMAX -1 -5 -1 -5 -2 -10 0 1.3 V+ 2.5 5 1 nA 5 1 nA 5 2 nA 10 V SYMBOL CONDITIONS TA MIN TYP MAX UNITS
On-Resistance NO_ or NC_ Off-Leakage Current
COM_ Off-Leakage Current
ICOM_(OFF)
COM_ On-Leakage Current
ICOM_(ON)
SWITCH DYNAMIC CHARACTERISTICS Turn-On Time tON VNO_, VNC_ = 1.5V, RL = 50, CL = 35pF, Figure 1 VNO_, VNC_ = 1.5V, RL = 50, CL = 35pF, Figure 1 VNO_, VNC_ = 1.5V, RL = 50, CL = 35pF, Figure 1 (MAX4743) VGEN = 0, RGEN = 0, CL = 1nF, Figure 2 f = 1MHz, VNO_ = VNC_ = 1VRMS, RL = 50, CL = 5pF, Figure 2 f = 1MHz, VCOM_ = 1VRMS, RL = 50, CL = 5pF, Figure 2 +25C TMIN to TMAX +25C TMIN to TMAX +25C TMIN to TMAX +25C 1 16 pC 10 ns 16 25 35 ns 40 25 ns 30
Turn-Off Time
tOFF
Break-Before-Make (Note 6)
tBBM
Charge Injection
Q
Off-Isolation (Note 7)
VISO
+25C
-50
dB
Crosstalk (Note 8)
+25C
-110
dB
4
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0.8, Low-Voltage, Single-Supply Dual SPST Analog Switches
ELECTRICAL CHARACTERISTICS--Single +1.8V Supply (continued)
(V+ = +1.8V, VIH = +1.0V, VIL = 0.4V, TA = TMIN to TMAX, unless otherwise specified. Typical values are at TA = +25C.) (Notes 2, 3)
PARAMETER LOGIC INPUT Input Logic High Input Logic Low Input Leakage Current VIH VIL IIN VIN_ = 0 or V+ -1 1 0.4 1 V V A SYMBOL CONDITIONS TA MIN TYP MAX UNITS
MAX4741/MAX4742/MAX4743
Note 2: The algebraic convention, where the most negative value is a minimum and the most positive value is a maximum, is used in this data sheet. Note 3: SOT23 packaged parts are 100% tested at +25C. Limits across the full temperature range are guaranteed by design and correlation. MAX packaged parts -40C specifications are guaranteed by design. Note 4: RON = RON(MAX) - RON(MIN). Note 5: Flatness is defined as the difference between the maximum and the minimum value of on-resistance as measured over the specified analog signal ranges. Note 6: Guaranteed by design. Note 7: Off-Isolation = 20log10(VCOM_/VNO_), VCOM_ = output, VNO_ = input to off switch. Note 8: Between two switches.
Typical Operating Characteristics
(TA = +25C, unless otherwise noted.)
ON-RESISTANCE vs. VCOM AND TEMPERATURE
MAX4741 toc02 MAX4741 toc01
ON-RESISTANCE vs. VCOM
1.4 1.2 1.0 RON () 0.8 0.6 0.4 0.2 0 0 0.4 0.8 1.2 1.6 2.0 2.4 2.8 3.2 3.6 VCOM (V) V+ = +1.8V 0.7 0.6 0.5 0.4 0.3 0.2 0.1 0 0
TURN-ON/OFF TIME vs. SUPPLY VOLTAGE
40 36 tON/tOFF (ns) 32 28 24 20 16 tOFF tON
MAX4741 toc03
44
ICOM = 100mA
V+ = +2.0V V+ = +2.5V V+ = +2.7V V+ = +3.0V V+ = +3.3V
TA = +85C
RON ()
TA = -40C
TA = +25C
V+ = +3.6V
V+ = +2.7V ICOM = 100mA 0.3 0.6 0.9 1.2 1.5 1.8 2.1 2.4 2.7 VCOM (V)
12 8 1.6 1.8 2.0 2.2 2.4 2.6 2.8 3.0 3.2 3.4 3.6 V+ (V)
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0.8, Low-Voltage, Single-Supply Dual SPST Analog Switches MAX4741/MAX4742/MAX4743
Typical Operating Characteristics (continued)
(TA = +25C, unless otherwise noted.)
TURN-ON/OFF TIME vs. TEMPERATURE
MAX4741 toc04
LEAKAGE CURRENT vs. TEMPERATURE
MAX4741 toc05
CHARGE INJECTION vs. OUTPUT VOLTAGE
40 35 30 V+ = +3.3V
MAX4741 toc06
26 24 22 tON/tOFF (ns) 20 tON, V+ = +3V tON, V+ = +1.8V
10,000
45
1000 ICOM (pA) ON 100 OFF Q (pC) 25 20 15 10 tOFF, V+ = +3V 1 -40 -15 10 35 60 85 -40 -15 10 35 60 85 TEMPERATURE (C) TEMPERATURE (C) V+ = +3V 10 5 0 0 0.3 0.6 0.9 1.2 1.5 1.8 2.1 2.4 2.7 3.0 3.3 VCOM (V) V+ = +1.8V
18 16 14 12 10 8
tOFF, V+ = +1.8V
FREQUENCY RESPONSE
MAX4741 toc07
LOGIC THRESHOLD VOLTAGE vs. SUPPLY VOLTAGE
MAX4741 toc08
1.1 1.0 THRESHOLD (V) 0.9 RISING 0.8 FALLING 0.7 0.6 0.5
0 -15 -30 LOSS (dB) -45 -60 -75 -90 -105 -120 0.01
ON-RESPONSE
OFF-ISOLATION CROSSTALK
0.1
1
10
100
1000
1.6 1.8 2.0 2.2 2.4 2.6 2.8 3.0 3.2 3.4 3.6 V+ (V)
FREQUENCY (MHz)
TOTAL HARMONIC DISTORTION vs. FREQUENCY
MAX4741 toc09
SUPPLY CURRENT vs. SUPPLY VOLTAGE AND TEMPERATURE
MAX4741 toc10
0.025 RL = 32 V+ = +3V 0.020
100.00 TA = +85C 10.00 TA = +25C 1.00
THD (%)
0.010 0.10 0.005 0 1 10 100 1k 10k 100k FREQUENCY (Hz) TA = -40C
I+ (nA)
0.015
0.01 0 0.4 0.8 1.2 1.6 2.0 2.4 2.8 3.2 3.6 V+ (V)
6
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0.8, Low-Voltage, Single-Supply Dual SPST Analog Switches
Pin Description
PIN MAX4741 MAX 1 -- 2 3 4 5 -- 6 7 8 SOT23-8 8 -- 7 6 5 3 -- 4 1 2 -- 1 2 3 4 -- 5 6 7 8 MAX4742 MAX SOT23-8 -- 8 7 6 5 -- 3 4 1 2 1 -- 2 3 4 -- 5 6 7 8 MAX4743 MAX SOT23-8 8 -- 7 6 5 -- 3 4 1 2 NO1 NC1 COM1 IN2 GND NO2 NC2 COM2 IN1 V+ Analog Switch 1 Normally Open Analog Switch 1 Normally Closed Analog Switch 1 Common Logic Control Input Switch 2 Ground Analog Switch 2 Normally Open Analog Switch 2 Normally Closed Analog Switch 2 Common Logic Control Input Switch 1 Positive Supply Voltage NAME FUNCTION
MAX4741/MAX4742/MAX4743
Detailed Description
The MAX4741/MAX4742/MAX4743 are low 0.8 max (at V+ = +3V) on-resistance, low-voltage, dual analog switches that operate from a +1.6V to +3.6V single supply. CMOS switch construction allows switching analog signals that are within the supply voltage range (GND to V+). When powered from a +3V supply, the 0.8 max RON allows high continuous currents to be switched in a variety of applications.
Analog Signal Levels
Analog signals that range over the entire supply voltage (V+ to GND) can be passed with very little change in onresistance (see Typical Operating Characteristics). The switches are bidirectional, so the NO_, NC_, and COM_ pins can be used as either inputs or outputs.
Layout
High-speed switches require proper layout and design procedures for optimum performance. Reduce stray inductance and capacitance by keeping traces short and wide. Ensure that bypass capacitors are as close to the device as possible. Use large ground planes where possible.
Applications Information
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, followed by NO_, NC_, or COM_. Although it is not required, power-supply bypassing improves noise margin and prevents switching noise propagation from the V+ supply to other components. A 0.1F capacitor, connected from V+ to GND, is adequate for most applications.
Logic Inputs
The MAX4741/MAX4742/MAX4743 logic inputs can be driven up to +3.6V regardless of the supply voltage. For example, with a +1.8V supply, IN_ may be driven low to GND and high to +3.6V. Driving IN_ rail-to-rail minimizes power consumption.
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0.8, Low-Voltage, Single-Supply Dual SPST Analog Switches MAX4741/MAX4742/MAX4743
Test Circuits/Timing Diagrams
V+ V+ VIH + 0.5V IN_ 0 VCOM_ VCOM_ 50 GND 50 35pF 0 tON tOFF VNO_ 90% 90% 50% 50% tR < 5ns tF < 5ns
OPEN
NO_
NO_
VNO_
MAX4741
IN_ COM_
V+ V+ VIH + 0.5V IN_ 0 VCOM_ 50 35pF VNC_ VCOM_ 0 tOFF 50% 50%
OPEN
NC_
NC_
VNC_
MAX4742
IN_ 50 GND COM_
90%
90%
tON
V+ V+ VIH + 0.5V IN_ 0 VCOM_ 50 35pF VCOM_ 0 tBBM tBBM = tON(NO_) - tOFF(NC_) OR tBBM = tON(NC_) - tOFF(NO_) tBBM VS
VS
NC_
NO_
VS
MAX4743
IN_ 50 GND COM_
90%
90%
Figure 1. Switching Times
8
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0.8, Low-Voltage, Single-Supply Dual SPST Analog Switches
Test Circuits/Timing Diagrams (continued)
V+ 0.1F NETWORK ANALYZER 50 50
MAX4741/MAX4742/MAX4743
V+
NO_ OR NC_
VIN * VOUT
V+ IN_
MAX4741 MAX4742 MAX4743 COM_
GND
MEAS
REF
50
50
MEASUREMENTS ARE STANDARDIZED AGAINST SHORT AT SOCKET TERMINALS. OFF-ISOLATION IS MEASURED BETWEEN COM AND "OFF" TERMINAL ON EACH SWITCH. ON-LOSS IS MEASURED BETWEEN COM AND "ON" TERMINAL ON EACH SWITCH. SIGNAL DIRECTION THROUGH SWITCH IS REVERSED; WORST VALUES ARE RECORDED.
V OFF-ISOLATION = 20log OUT VIN VOUT ON-LOSS = 20log VIN * ADD 50 TERMINATION FOR OFF-ISOLATION
Figure 2. Off-Isolation, On-Loss, and Crosstalk
V+ RGEN V+ VGEN NO_ OR NC_ VIN
V+
V+
NO_ OR NC_
IN_ 50
MAX4741 MAX4742 MAX4743 COM_
GND
VOUT CL 1000pF
AS REQUIRED
MAX4741 MAX4742 IN_ MAX4743 COM_
GND
1MHz CAPACITANCE ANALYZER
Figure 4. NO_, NC_, and COM_ Capacitance
V+ VIN 0 MAX4741 MAX4742
VOUT
VOUT
VOUT IS THE MEASURED VOLTAGE DUE TO CHARGE TRANSFER ERROR Q WHEN THE CHANNEL TURNS OFF. Q = VOUT x CL
Figure 3. Charge Injection
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0.8, Low-Voltage, Single-Supply Dual SPST Analog Switches MAX4741/MAX4742/MAX4743
Pin Configurations (continued)
TOP VIEW
MAX4741 MAX4742 MAX4743
IN1 V+ NO2 COM2
1 2 3 4
8 7 6 5
NO1 COM1 IN2 GND
IN1 V+ NC2 COM2
1 2 3 4
8 7 6 5
NC1 COM1 IN2 GND
IN1 V+ NC2 COM2
1 2 3 4
8 7 6 5
NO1 COM1 IN2 GND
SOT23-8
SOT23-8
SOT23-8
Chip Information
TRANSISTOR COUNT = 121 PROCESS = CMOS
10
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0.8, Low-Voltage, Single-Supply Dual SPST Analog Switches
Package Information
SOT23, 8L.EPS
MAX4741/MAX4742/MAX4743
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0.8, Low-Voltage, Single-Supply Dual SPST Analog Switches MAX4741/MAX4742/MAX4743
Package Information (continued)
8LUMAXD.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) 2001 Maxim Integrated Products Printed USA is a registered trademark of Maxim Integrated Products.

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