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19-1880; Rev 0; 1/01
25 SPST Analog Switches in SOT23-6
General Description
The MAX4647/MAX4648 are dual-supply single-pole/single-throw (SPST) switches. On-resistance is 25 max and flat (2 max) over the specified signal range. Each switch can handle Rail-to-Rail(R) analog signals. Off-leakage current is only 1nA max at +25C. They conduct analog or digital signals equally well in either direction. The primary application areas are in the switching and routing of signals in telecommunications and test equipment. The MAX4647/MAX4648 are single SPST analog switches. The MAX4647 has one normally closed (NC) switch, and the MAX4648 has one normally open (NO) switch. These devices operate from a single +9V to +36V supply or from dual 4.5V to 20V supplies. The MAX4647/MAX4648 are available in tiny 6-pin SOT23 packages.
____________________________Features
o Low On-Resistance 25 max (15V Supplies) o Guaranteed RON Flatness Over Specified Signal Range (2 max) o VL Logic Supply Not Required o Rail-to-Rail Signal Handling o 15V and Single 12V Supply Operation o Low Leakage (1nA max) o Fast Switching Speeds tON = 100ns tOFF = 100ns
MAX4647/MAX4648
________________________Applications
PBX, PABX Systems Communication Systems DSL Test Equipment Avionics Audio Systems Redundant Systems Relay Replacement PC Multimedia Boards
PART MAX4647EUT-T MAX4648EUT-T
Ordering Information
TEMP. RANGE -40C to +85C -40C to +85C PINPACKAGE 6 SOT23 6 SOT23 TOP MARK AARV AARW
Pin Configurations/Functional Diagrams/Truth Tables
TOP VIEW
NC 1
MAX4647
6 COM NO 1
MAX4648
6 COM
V- 2
5
V+
V- 2
5
V+
IN 3
4
GND
IN 3
4
GND
SOT23-6
LOGIC 0 1 SWITCH ON OFF
SOT23-6
LOGIC 0 1 SWITCH OFF ON
Rail-to-Rail is a registered trademark of Nippon Motorola, Inc ________________________________________________________________ Maxim Integrated Products 1
For price, delivery, and to place orders, please contact Maxim Distribution at 1-888-629-4642, or visit Maxim's website at www.maxim-ic.com.
25 SPST Analog Switches in SOT23-6 MAX4647/MAX4648
ABSOLUTE MAXIMUM RATINGS
(Voltages referenced to GND) V+ ...........................................................................-0.3V, +44.0V V- ............................................................................-44.0V, +0.3V V+ to V-................................................................-0.3V to +44.0V All Other Pins (Note 1)...............................V- - 0.3V to V+ + 0.3V Continuous Current into Any Terminal..............................60mA Peak Current into Any Terminal (pulsed at 1ms, 10% duty cycle)...............................100mA Continuous Power Dissipation (TA = +70C) 6-Pin SOT23 (derate 8.7mW/C above +70C)...........696mW Operating Temperature Ranges MAX464_EUT..................................................-40C to +85C Storage Temperature Range .............................-65C to +150C Junction Temperature ......................................................+150C Lead Temperature (soldering, 10s) .................................+300C
Note 1: Signals on NO, NC, 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--Dual 15V Supplies
(V+ = +15V, V- = -15V, VIH = 2.4V, VIL = 0.8V, TA = TMIN to TMAX, unless otherwise noted. Typical values are at TA = +25C.) (Notes 2, 3)
PARAMETER ANALOG SWITCH Analog Signal Range On-Resistance On-Resistance Flatness (Note 4) NO or NC Off-Leakage Current COM Off-Leakage Current COM On-Leakage Current LOGIC INPUT Input Logic High Input Logic Low Input Leakage Current VIH VIL IIN VIN = 0 or +5V VNO or VNC = 10V; R L = 300; CL = 35pF; Figure 2 VNO or VNC = 10V; R L =300; CL = 35pF; Figure 2 COM = 0; RS = 0; CL = 1nF; Figure 3 TMIN to TMAX TMIN to TMAX TMIN to TMAX +25C TMIN to TMAX +25C TMIN to TMAX +25C 4 62 -1 68 2.4 0.8 1 100 125 100 125 V V A VNO,VNC, VCOM RON RFLAT(ON) INO(OFF) or INC(OFF) ICOM(OFF) ICOM = 10mA; VNO or VNC = 10V ICOM = 10mA; VNO or VNC = +5V, 0, -5V VNO or VNC = +14V, -14V; VCOM = -14V, +14V VCOM = -14V, +14V; VNO or VNC = +14V, -14V VCOM = +14V, -14V; VNO or VNC = +14V, -14V or floating +25C TMIN to TMAX +25C TMIN to TMAX +25C TMIN to TMAX +25C TMIN to TMAX +25C TMIN to TMAX -1 -10 -1 -10 -2 -20 0.01 0.01 0.8 V18 V+ 25 30 2 3 1 10 1 10 2 20 nA V nA nA SYMBOL CONDITIONS TA MIN TYP MAX UNITS
ICOM(ON)
DYNAMIC CHARACTERISTICS Turn-On Time Turn-Off Time Charge Injection tON tOFF Q ns ns pC
2
_______________________________________________________________________________________
25 SPST Analog Switches in SOT23-6
ELECTRICAL CHARACTERISTICS--Dual 15V Supplies (continued)
(V+ = +15V, V- = -15V, VIH = 2.4V, VIL = 0.8V, TA = TMIN to TMAX, unless otherwise noted. Typical values are at T A = +25C. (Notes 2, 3)
PARAMETER Off-Isolation Total Harmonic Distortion VNO or VNC Off-Capacitance COM Off-Capacitance COM On-Capacitance POWER SUPPLY Power Supply Range VIN = 5V Positive Supply Current I+ VIN = 0 or V+ Negative Supply Current IVIN = 0 or 5V TMIN to TMAX +25C TMIN to TMAX +25C TMIN to TMAX +25C TMIN to TMAX 0.001 0.001 4.5 45 20 100 150 1 10 1 10 A A V SYMBOL VISO THD CNO(OFF), CNC(OFF) CCOM(OFF) CCOM(ON) CONDITIONS CL = 5pF; RL = 50; f = 1MHz; VCOM = 1VRMS; Figure 4 RL = 600, 5Vp-p, f = 20Hz to 20kHz f = 1MHz; Figure 5 f = 1MHz; Figure 5 f = 1MHz; Figure 6 TA +25C +25C +25C +25C +25C MIN TYP -92 0.006 6 6 19 MAX UNITS dB % pF pF pF
MAX4647/MAX4648 MAX4647/MAX4648
ELECTRICAL CHARACTERISTICS--Single +12V Supply
(V+ = +12V, V- = 0, VIH = 2.4V, VIL = 0.8V, TA = TMIN to TMAX, unless otherwise noted. Typical values are at TA = +25C.) (Notes 2, 3)
PARAMETER ANALOG SWITCH Analog Signal Range On-Resistance On-Resistance Flatness (Note 4) DYNAMIC Turn-On Time Turn-Off Time Charge Injection tON tOFF Q VNO or VNC = +10V; RL = 300; CL = 35pF; Figure 2 VNO or VNC = +10V; RL = 300; CL = 35pF; Figure 2 COM = 0; RS = 0; CL = 1nF; Figure 3 +25C TMIN to TMAX +25C TMIN to TMAX +25C -5 68 100 175 225 150 200 ns ns pC VNO, VNC, VCOM RON RFLAT(ON) ICOM = 10mA; VNO or VNC = +10V ICOM = 10mA; VNO or VNC = +2V, +6V, +10V +25C TMIN to TMAX +25C TMIN to TMAX 4 0 36 V+ 45 60 6 8 V SYMBOL CONDITIONS TA MIN TYP MAX UNITS
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3
25 SPST Analog Switches in SOT23-6 MAX4647/MAX4648
ELECTRICAL CHARACTERISTICS--Single +12V Supply (continued)
(V+ = +12V, V- = 0, VIH = 2.4V, VIL = 0.8V, TA = TMIN to TMAX, unless otherwise noted. Typical values are at TA = +25C.) (Notes 2, 3)
PARAMETER Power Supply Range Positive Supply Current VIN = 5V I+ VIN = 0 or V+ SYMBOL CONDITIONS TA TMIN to TMAX +25C TMIN to TMAX +25C TMIN to TMAX 0.001 MIN +9 20 TYP MAX +36 50 75 1 10 A UNITS V
Note 2: The algebraic convention is used in this data sheet; the most negative value is shown in the minimum column. Note 3: SOT packaged parts are 100% tested at +25C. Limits across the full temperature range are guaranteed by design and correlation. Note 4: Flatness is defined as the difference between the maximum and minimum value of on-resistance as measured over the specified analog signal range.
Typical Operating Characteristics
(TA = +25C, unless otherwise noted.)
ON-RESISTANCE vs. VCOM (DUAL SUPPLIES)
MAX4647/48 toc01
ON-RESISTANCE vs. VCOM (SINGLE SUPPLY)
MAX4647/48 toc02
ON-RESISTANCE vs. VCOM AND TEMPERATURE (DUAL SUPPLIES)
MAX4647/48 toc03
50 45 40 RON () 35 30 25 20 15 10 -20 -10 0 VCOM (V) 10 A: V+ = +8, V- = -8V B: V+ = +10V, V- = -10V C: V+ = +12V, V- = -12V D: V+ = +15V, V- = -15V E: V+ = +20V, V- = -20V A B C D E
50 45 40 RON () 35 30 25 V+ = +24V 20 15 10 0 10 20 VCOM (V) 30 V+ = +36V V+ = +9V V+ = +12V
30 25 TA = +85C 20 RON () TA = +25C 15 TA = -40C 10 5 0 -15 -10 -5 0 VCOM (V) 5 10 V+ = +15V V- = -15V
20
15
ON-RESISTANCE vs. VCOM AND TEMPERATURE (SINGLE SUPPLY)
MAX4647/48 toc04
ON-LEAKAGE CURRENT vs. TEMPERATURE
MAX4647/48 toc05
OFF-LEAKAGE CURRENT vs. TEMPERATURE
V+ = +15V V- = -15V VNC OR VNO = 10V VCOM = 10V
MAX4647/48 toc06
55 50 45 RON () 40 35 30 TA = -40C 25 20 15 0 5 VCOM (V) 10 TA = +25C V+ = +12V V- = O TA = +85C
10 1 ON-LEAKAGE (nA) 0.1 0.01 DUAL SUPPLIES V+ = +15V V- = -15V VCOM = 10V
1
0.1 OFF-LEAKAGE (nA)
0.01 DUAL SUPPLIES
0.001 SINGLE SUPPLY
0.001 0.0001 0.00001 15 -40 -20 0 20 40 60 80 TEMPERATURE (C) SINGLE SUPPLY 0.0001 -40 -20 0 20 40 60 80 TEMEPERATURE (C)
4
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25 SPST Analog Switches in SOT23-6 MAX4647/MAX4648
Typical Operating Characteristics (continued)
(TA = +25C, unless otherwise noted.)
FREQUENCY RESPONSE
MAX4647/48 toc07
TOTAL HARMONIC DISTORTION vs.FREQUENCY
MAX4647/48 toc08
SUPPLY CURRENT vs. TEMPERATURE
V+ = +15V V- = -15V IN = 5V
MAX4647/48 toc09
0 -10 -20 -30 LOSS (dB) -40 -50 -60 -70 -80 -90 -100 0.1 1 10 FREQUENCY (MHz) 100 OFF-ISOLATION ON-RESPONSE
100 10 DISTORTION (%) 1 0.1 0.01 0.001 0.0001 SIGNAL DISTORTION MEASUREMENT LIMITS V+ = +15V V- = -15V 5VRMS SIGNAL 600 SOURCE AND LOAD
100
10 I+, I-, IGND (A)
I+, IGND
1
0.1
I-
0.01
0.001 10 100 1k FREQUENCY (Hz) 10k 100k -40 -15 10 35 60 85 TEMPERATURE (C)
1000
SUPPLY CURRENT vs. LOGIC THRESHOLD
MAX4647/48 toc10
CHARGE INJECTION vs. VCOM
MAX4647/48 toc11
LOGIC THRESHOLD vs. SUPPLY VOLTAGE
4.5 4.0 LOGIC THRESHOLD (V) 3.5 3.0 2.5 2.0 1.5 1.0 0.5 0
MAX4647/48 toc12
1000 100 10 1 0.1 0.01 V+ = +15V V- = -15V VCOM = +14V I+ (A)
40 30 20 CHARGE (pC) A 10 0 -10 -20 -30 -40 B A: V+ = +15V, V- = -15V B: V+ = +12V, V- = 0
5.0
0.001 0.0001 0.00001 0.000001 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 IN (V)
-15
-10
-5
0 VCOM (V)
5
10
15
0
10
20 V+ (V)
30
Pin Description
MAX4647 1 -- 2 3 4 5 6 MAX4648 -- 1 2 3 4 5 6 PIN NAME NC NO VIN GND V+ COM Normally Closed Switch Terminal Normally Open Switch Terminal Negative Supply Voltage Input Digital Control Input Ground Positive Supply Voltage Input Analog Switch Common FUNCTION
_______________________________________________________________________________________
5
25 SPST Analog Switches in SOT23-6 MAX4647/MAX4648
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, NC, or COM. If power-supply sequencing is not possible, add two small signal diodes (D1, D2) in series with supply pins (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. These protection diodes are not recommended when using a single supply. more pronounced with higher source and load impedances. Above 5MHz, circuit board layout becomes critical. The graphs shown in the Typical Operating Characteristics were taken using a 50 source and load connected with BNC connectors.
V+
D2 V+
MAX4647 MAX4648
NO COM Vg
VD1
Off-Isolation at High Frequencies
In 50 systems, the high-frequency on-response of these parts extends from DC to above 300MHz, 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. This effect is
V-
Figure 1. Overvoltage Protection Using External Blocking Diodes
V+ LOGIC INPUT +3V 50% 0 t r < 20ns t f < 20ns SWITCH INPUT t OFF IN VO SWITCH OUTPUT 0 t ON 0.9V0 0.9V0 LOGIC INPUT GND 0 VVV COM COM V+ NO OR NC
MAX4647 MAX4648
SWITCH OUTPUT VO RL 300 CL 35pF
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
6
_______________________________________________________________________________________
25 SPST Analog Switches in SOT23-6 MAX4647/MAX4648
MAX4647 MAX4648
V+ V+ RGEN VO COM NC OR NO CL GND IN VVO VIN
VO
V GEN
OFF
ON
OFF
VVIN = +3V
VIN
OFF
ON Q = (V O )(C L )
OFF
VIN DEPENDS ON SWITCH CONFIGURATION; INPUT POLARITY DETERMINED BY SENSE OF SWITCH.
Figure 3. Charge Injection Test Circuit
C SIGNAL GENERATOR COM
V+
MAX4647 MAX4648
C
V+
MAX4647 MAX4648
V+
V+ COM
IN ANALYZER RL VNC OR NO GND V-
0 OR 3V CAPACITANCE METER NC OR NO C f = 1MHz GND V-
IN
0 OR 3V
C
V-
Figure 4. Off-Isolation Test Circuit
Figure 5. Channel-Off Capacitance Test Circuit
________________________________________________________________________________________
7
25 SPST Analog Switches in SOT23-6 MAX4647/MAX4648
Chip Information
TRANSISTOR COUNT: 24 PROCESS TECHNOLOGY: CMOS
C +15V
MAX4647 MAX4648
V+ COM CAPACITANCE METER IN f = 1MHz NC OR NO GND VC 0 OR 3V
-15V
Figure 6. Channel-On Capacitance Test Circuit
8
_______________________________________________________________________________________
25 SPST Analog Switches in SOT23-6
Package Information
b e
DIM A A1 A2 b C D E E1 L e e1 MILLIMETERS MIN MAX 0.90 1.45 0.00 0.15 0.90 1.30 0.25 0.50 0.08 0.20 2.80 3.00 2.60 3.00 1.50 1.75 0.35 0.55 0.95ref 1.90ref 0 10
21-0058
MAX4647/MAX4648
E
e1 D
A
E1
A A2
C
L
6-PIN SOT-23 SMALL-OUTLINE TRANSISTOR PACKAGE
A1
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.
Maxim Integrated Products, 120 San Gabriel Drive, Sunnyvale, CA 94086 408-737-7600 _____________________ 9 (c) 2001 Maxim Integrated Products Printed USA is a registered trademark of Maxim Integrated Products.

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