General Description
The MAX4737/MAX4738/MAX4739 low-voltage, low on-
resistance (RON), quad single-pole/single throw (SPST)
analog switches operate from a single +1.8V to +5.5V
supply. These devices are designed for USB 1.1 and
audio switching applications.
The MAX4737/MAX4738/MAX4739 feature 4.5ΩRON
(max) with 1.2Ωflatness and 0.4Ωmatching between
channels. These new switches feature guaranteed
operation from +1.8V to +5.5V and are fully specified at
3V and 5V. These switches offer break-before-make
switching (1ns) with tON <80ns and tOFF <40ns at
+2.7V. The digital logic inputs are +1.8V logic compati-
ble with a +2.7V to +3.6V supply.
These switches are packaged in a chip-scale package
(UCSP™), significantly reducing the required PC board
area. The chip occupies only a 2mm ✕2mm area and
has a 4 ✕4 bump array with a bump pitch of 0.5mm.
These switches are also available in a 14-pin TSSOP
and a 16-pin thin QFN (4mm x 4mm) package.
Applications
Battery-Operated Equipment
Audio/Video-Signal Routing
Low-Voltage Data-Acquisition Systems
Sample-and-Hold Circuits
Data-Acquisition Systems
Communications Circuits
Features
♦USB 1.1 Signal Switching
♦2ns (max) Differential Skew
♦-3dB Bandwidth: >300MHz
♦Low 20pF On-Channel Capacitance
♦Low RON
4.5Ω(max) (+3V Supply)
3Ω(max) (+5V Supply)
♦0.4Ω(max) RON Match (+3V Supply)
♦1.2Ω(max) RON Flatness (+3V Supply)
♦<0.5nA Leakage Current at +25°C
♦High Off-Isolation: -55dB (10MHz)
♦Low Crosstalk: -80dB (10MHz)
♦Low Distortion: 0.03%
♦+1.8V CMOS-Logic Compatible
♦Single-Supply Operation from +1.8V to +5.5V
♦Rail-to-Rail Signal Handling
MAX4737/MAX4738/MAX4739
4.5
Ω
Quad SPST Analog Switches in UCSP
________________________________________________________________ Maxim Integrated Products 1
19-2633; Rev 1; 4/04
For pricing, delivery, and ordering information, please contact Maxim/Dallas Direct! at
1-888-629-4642, or visit Maxim’s website at www.maxim-ic.com.
C
D
B
A
1234
IN2
COM2
COM1
NO2
IN3
V+
NO1
NO3
GND
IN1
COM3
COM4
NO4
IN4
TOP VIEW
(BUMPS SIDE DOWN)
MAX4737
C
D
B
A
1234
IN2
COM2
COM1
NC2
IN3
V+
NC1
NC3
GND
IN1
COM3
COM4
NC4
IN4
MAX4738
C
D
B
A
1234
IN2
COM2
COM1
NC2
IN3
V+
NO1
NO3
GND
IN1
COM3
COM4
NC4
IN4
MAX4739
IN_
LOW
HIGH
NO_
OFF
ON
NC_
ON
OFF
UCSP UCSP UCSP
Pin Configurations/Functional Diagrams/Truth Tables
UCSP is a trademark of Maxim Integrated Products, Inc.
Ordering Information
PART
TEMP RANGE
PIN/BUMP-
PACKAGE
TOP
MARK
MAX4737EUD
-40°C to +85°C
14 TSSOP —
MAX4737ETE
-40°C to +85°C 16 Thin QFN
—
MAX4737EBE-T
-40°C to +85°C 16 UCSP-16
4737
MAX4738EUD
-40°C to +85°C
14 TSSOP —
MAX4738ETE
-40°C to +85°C 16 Thin QFN
—
MAX4738EBE-T
-40°C to +85°C 16 UCSP-16
4738
MAX4739EUD
-40°C to +85°C
14 TSSOP —
MAX4739ETE
-40°C to +85°C 16 Thin QFN
—
MAX4739EBE-T
-40°C to +85°C 16 UCSP-16
4739
Pin Configurations/Functional Diagrams/Truth Tables continued at end of data sheet
MAX4737/MAX4738/MAX4739
4.5
Ω
Quad SPST Analog Switches in UCSP
2 _______________________________________________________________________________________
ABSOLUTE MAXIMUM RATINGS
ELECTRICAL CHARACTERISTICS—Single +3V Supply
(V+ = +2.7V to +3.6V, VIH = +1.4V, VIL = +0.5V, TA= TMIN to TMAX, unless otherwise noted. Typical values are at V+ = +3.0V,
TA= +25°C, unless otherwise noted.) (Notes 3, 4)
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.
(All Voltages Referenced to GND)
V+, IN_...................................................................-0.3V to +6.0V
COM_, NO_, NC_ (Note 1) ...........................-0.3V to (V+ + 0.3V)
Continuous Current COM_, NO_, NC_ ...........................±100mA
Peak Current COM_, NO_, NC_
(pulsed at 1ms, 10% duty cycle)................................±200mA
Continuous Power Dissipation (TA= +70°C)
14-Pin TSSOP (derate 6.3mW/°C above +70°C) .........500mW
16-Bump UCSP (derate 8.3mW/°C above +70°C) ......659mW
16-Pin Thin QFN (derate 25mW/°C above +70°C) ....2000mW
ESD Method 3015.7 .............................................................>2kV
Operating Temperature Range ...........................-40°C to +85°C
Junction Temperature......................................................+150°C
Storage Temperature Range .............................-65°C to +150°C
Lead Temperature (soldering, 10s) .................................+300°C
Bump Temperature (soldering)
Infrared (15s) ...............................................................+220°C
Vapor Phase (60s) .......................................................+215°C
Note 1: Signals on COM_, NO_, or NC_ exceeding V+ or GND are clamped by internal diodes. Limit forward-diode current to maxi-
mum current rating.
PARAMETER SYMBOL CONDITIONS TAMIN TYP MAX UNITS
Analog Signal Range VCOM_,
VNO_, VNC_ 0V+V
ANALOG SWITCH
+25°C 3.0 4.5
On-Resistance (Note 5) RON V+ = 2.7V, ICOM_ = 10mA;
VNO_ or VNC_ = 1.5V TMIN to
TMAX 5Ω
+25°C 0.1 0.4
On-Resistance Match Between
Channels (Notes 5, 6) ∆RON V+ = 2.7V, ICOM_ = 10mA;
VNO_ or VNC_ = 1.5V TMIN to
TMAX 0.5 Ω
+25°C 0.6 1.2
On-Resistance Flatness (Note 7) RFLAT
(
ON
)
V+ = 2.7V, ICOM_ = 10mA;
VNO_ or VNC_ = 1.0V, 1.5V, 2.0V TMIN to
TMAX 1.5 Ω
+25°C -0.5 +0.01 +0.5
NO_, NC_ Off-Leakage Current
(Note 8)
INO_
(
OFF
)
,
INC_
(
OFF
)
V+ = 3.6V, VCOM_ = 0.3V, 3.3V;
VNO_ or VNC_ = 3.3V, 0.3V TMIN to
TMAX -1 +1 nA
+25°C -0.5 +0.01 +0.5
COM_ Off-Leakage Current
(Note 8) IC OM_
(
OFF
)
V+ = 3.6V, VCOM_ = 0.3V, 3.3V;
VNO_ or VNC_ = 3.3V, 0.3V TMIN to
TMAX -1 +1 nA
+25°C -1 +0.01 +1
COM_ On-Leakage Current
(Note 8) ICOM_
(
ON
)
V+ = 3.6V, VCOM_ = 0.3V, 3.3V;
VNO_ or VNC_ = 0.3V, 3.3V, or
floating
TMIN to
TMAX -2 +2 nA
MAX4737/MAX4738/MAX4739
4.5
Ω
Quad SPST Analog Switches in UCSP
_______________________________________________________________________________________ 3
ELECTRICAL CHARACTERISTICS—Single +3V Supply (continued)
(V+ = +2.7V to +3.6V, VIH = +1.4V, VIL = +0.5V, TA= TMIN to TMAX, unless otherwise noted. Typical values are at V+ = +3.0V,
TA= +25°C, unless otherwise noted.) (Notes 3, 4)
PARAMETER SYMBOL CONDITIONS TAMIN TYP MAX UNITS
DYNAMIC CHARACTERISTICS
+25°C 40 80
Turn-On Time tON VNO_, VNC_ = 1.5V;
RL = 300Ω, CL = 35pF, Figure 1 TMIN to
TMAX 100 ns
+25°C 20 40
Turn-Off Time tOFF VNO_, VNC_ = 1.5V;
RL = 300Ω, CL = 35pF, Figure 1 TMIN to
TMAX 50 ns
+25°C 8
Break-Before-Make Time Delay
(MAX4739 Only) (Note 8) tBBM VNO_, VNC_ = 1.5V;
RL = 300Ω, CL = 35pF, Figure 2 TMIN to
TMAX 1ns
Skew (Note 8) tSKEW RS = 39Ω, CL = 50pF, Figure 3 TMIN to
TMAX 0.15 2 ns
Charge Injection Q VGEN = 2V, RGEN = 0Ω,
CL = 1.0nF, Figure 4 +25°C 5 pC
f = 10MHz; VNO_, VNC_ = 1VP-P;
RL = 50Ω, CL = 5pF, Figure 5a -55
Off-Isolation (Note 9) VISO f = 1MHz; VNO_, VNC_ = 1VP-P;
RL = 50Ω, CL = 5pF, Figure 5a
+25°C
-80
dB
f = 10MHz; VNO_, VNC_ = 1VP-P;
RL = 50Ω, CL = 5pF, Figure 5b -80
Crosstalk (Note 10) VCT f = 1MHz; VNO_, VNC_ = 1VP-P;
RL = 50Ω, CL = 5pF, Figure 5b
+25°C
-110
dB
On-Channel -3dB Bandwidth BW Signal = 0dBm, CL = 5pF, 50Ω
in and out, Figure 5a +25°C 300 MHz
Total Harmonic Distortion THD RL = 600Ω+25°C 0.03 %
NO_, NC_ Off-Capacitance CNO_
(
OFF
)
,
CNC_
(
OFF
)
f = 1MHz, Figure 6 +25°C 9 pF
Switch On-Capacitance CON f = 1MHz, Figure 6 +25°C 15 pF
DIGITAL I/O
Input Logic High Voltage VIH TMIN to
TMAX 1.4 V
Input Logic Low Voltage VIL TMIN to
TMAX 0.5 V
Input Leakage Current IIN V+ = 3.6V, VIN_ = 0 or 5.5V TMIN to
TMAX -0.1 +0.1 µA
MAX4737/MAX4738/MAX4739
4.5
Ω
Quad SPST Analog Switches in UCSP
4 _______________________________________________________________________________________
ELECTRICAL CHARACTERISTICS—Single +5V Supply
(V+ = +4.2V to +5.5V, VIH = +2.0V, VIL = +0.8V, TA= TMIN to TMAX, unless otherwise noted. Typical values are at V+ = +5.0V,
TA= +25°C, unless otherwise noted.) (Notes 3, 4)
PARAMETER SYMBOL CONDITIONS TAMIN TYP MAX UNITS
Analog Signal Range VCOM_,
VNO_, VNC_
TMIN to
TMAX 0V+V
ANALOG SWITCH
+25°C 1.7 3.0
On-Resistance (Note 5) RON V+ = 4.2V; ICOM_ = 10mA;
VNO_ or VNC_ = 3.5V TMIN to
TMAX 3.5 Ω
+25°C 0.1 0.3
On-Resistance Match Between
Channels (Notes 5, 6) ∆RON V+ = 4.2V; ICOM_ = 10mA;
VNO_ or VNC_ = 3.5V TMIN to
TMAX 0.4 Ω
+25°C 0.4 1.2
On-Resistance Flatness (Note 7) RFLAT
(
ON
)
V+ = 4.2V; ICOM_ = 10mA;
VNO_ or VNC_ = 1.0V, 2.0V, 3.5V TMIN to
TMAX 1.5 Ω
+25°C -0.5 0.01 +0.5
NO_, NC_ Off-Leakage Current
(Note 8)
INO_
(
OFF
),
INC_
(
OFF
)
V+ = 5.5V; VCOM_ = 1.0V, 4.5V;
VNO_ or VNC_ = 4.5V, 1.0V TMIN to
TMAX -1 +1 nA
+25°C -0.5 0.01 +0.5
COM_ Off-Leakage Current
(Note 8) ICOM_
(
OFF
)
V+ = 5.5V; VCOM_ = 1V, 4.5V;
VNO_ or VNC_ = 4.5V, 1V TMIN to
TMAX -1 +1 nA
+25°C -1 0.01 +1
COM_ On-Leakage Current
(Note 8) ICOM_
(
ON
)
V+ = 5.5V; VCOM_ = 1.0V, 4.5V;
VNO_ or VNC_ = 1.0V, 4.5V, or
floating
TMIN to
TMAX -2 +2 nA
DYNAMIC CHARACTERISTICS
+25°C 30 80
Turn-On Time tON VNO_, VNC_ = 3.0V;
RL = 300Ω, CL = 35pF, Figure 1 TMIN to
TMAX 100 ns
+25°C 20 40
Turn-Off Time tOFF VNO_, VNC_ = 3.0V;
RL = 300Ω, CL = 35pF, Figure 1 TMIN to
TMAX 50 ns
ELECTRICAL CHARACTERISTICS—Single +3V Supply (continued)
(V+ = +2.7V to +3.6V, VIH = +1.4V, VIL = +0.5V, TA= TMIN to TMAX, unless otherwise noted. Typical values are at V+ = +3.0V,
TA= +25°C, unless otherwise noted.) (Notes 3, 4)
PARAMETER SYMBOL CONDITIONS TAMIN TYP MAX UNITS
SUPPLY
Supply Voltage Range V+ TMIN to
TMAX 1.8 5.5 V
Positive Supply Current I+ V+ = 5.5V, VIN_ = 0V or V+ TMIN to
TMAX 1µA
MAX4737/MAX4738/MAX4739
4.5
Ω
Quad SPST Analog Switches in UCSP
_______________________________________________________________________________________ 5
ELECTRICAL CHARACTERISTICS—Single +5V Supply (continued)
(V+ = +4.2V to +5.5V, VIH = +2.0V, VIL = +0.8V, TA= TMIN to TMAX, unless otherwise noted. Typical values are at V+ = +5.0V,
TA= +25°C, unless otherwise noted.) (Notes 3, 4)
PARAMETER SYMBOL CONDITIONS TAMIN TYP MAX UNITS
+25°C 8
Break-Before-Make Time Delay
(MAX4739 Only) (Note 8) tBBM VNO_, VNC_ = 3.0V;
RL = 300Ω, CL = 35pF, Figure 2 TMIN to
TMAX 1ns
Skew (Note 8) tSKEW RS = 39Ω, CL = 50pF, Figure 3 TMIN to
TMAX 0.15 2 ns
DIGITAL I/O
Input Logic High Voltage VIH TMIN to
TMAX 2.0 V
Input Logic Low Voltage VIL TMIN to
TMAX 0.8 V
Input Leakage Current IIN V+ = 5.5V, VIN_ = 0V or V+ TMIN to
TMAX -0.1 +0.1 µA
POWER SUPPLY
Power-Supply Range V+ TMIN to
TMAX 1.8 5.5 V
Positive Supply Current I+ V+ = 5.5V, VIN_ = 0V or V+ TMIN to
TMAX 1µA
Note 3: UCSP parts are 100% tested at +25°C only, and guaranteed by design over the specified temperature range. TSSOP and
thin QFN parts are 100% tested at TMAX and guaranteed by design over the specified temperature range.
Note 4: The algebraic convention used in this data sheet is where the most negative value is a minimum and the most positive
value is a maximum.
Note 5: Guaranteed by design for UCSP and thin QFN parts.
Note 6: ∆RON = RON(MAX) - RON(MIN).
Note 7: Flatness is defined as the difference between the maximum and minimum value of on-resistance as measured over the
specified analog signal ranges.
Note 8: Guaranteed by design.
Note 9: Off-Isolation = 20log10 (VCOM / VNO), VCOM = output, VNO = input to off switch.
Note 10: Between any two switches.
MAX4737/MAX4738/MAX4739
4.5
Ω
Quad SPST Analog Switches in UCSP
6 _______________________________________________________________________________________
LEAKAGE CURRENT vs. TEMPERATURE
MAX4737/38/39 toc04a
TEMPERATURE (°C)
LEAKAGE CURRENT (pA)
603510-15
100
200
300
400
500
0
-40 85
V+ = 3V
COM ON-LEAKAGE
COM OFF-LEAKAGE
LEAKAGE CURRENT vs. TEMPERATURE
MAX4737/38/39 toc04b
TEMPERATURE (°C)
LEAKAGE CURRENT (pA)
603510-15
200
400
600
800
1000
0
-40 85
V+ = 5V
COM ON-LEAKAGE
COM OFF-LEAKAGE
CHARGE INJECTION vs. VCOM
MAX4737/38/39 toc05
VCOM (V)
CHARGE INJECTION (pC)
4321
10
20
30
40
50
0
05
CL = 1nF
V+ = 5V
CL = 1nF
V+ = 3V
SUPPLY CURRENT vs. TEMPERATURE
MAX4737/38/39 toc06
TEMPERATURE (°C)
SUPPLY CURRENT (nA)
603510-15
1
2
3
4
5
6
0
-40 85
V+ = 5V
V+ = 3V
SUPPLY CURRENT vs. LOGIC LEVEL
MAX4737/38/39 toc07
LOGIC LEVEL (V)
SUPPLY CURRENT (µA)
4321
20
40
60
80
100
0
05
V+ = 5V
V+ = 3V
TURN-ON/OFF TIME
vs. SUPPLY VOLTAGE
MAX4737/38/39 toc08
SUPPLY VOLTAGE (V)
tON/tOFF (ns)
4.53.52.5
20
40
60
80
100
0
1.5 5.5
tON
tOFF
ON-RESISTANCE vs. VCOM
MAX4737/38/39 toc01
VCOM (V)
RON (Ω)
4321
2
4
6
8
10
0
05
V+ = 1.8V
V+ = 2.5V
V+ = 3V V+ = 4.2V
V+ = 5V
ON-RESISTANCE vs. VCOM
MAX4737/38/39 toc02
VCOM (V)
RON (Ω)
2.52.01.51.00.5
2
3
4
5
6
1
0 3.0
TA = +85°C
TA = +25°C
TA = -40°C
V+ = 3V
ON-RESISTANCE vs. VCOM
MAX4737/38/39 toc03
VCOM (V)
RON (Ω)
4321
1
2
3
4
5
0
05
V+ = 5V
TA = +85°C
TA = +25°C
TA = -40°C
Typical Operating Characteristics
(TA = +25°C, unless otherwise noted.)
TURN-ON/OFF TIME
vs. TEMPERATURE
MAX4737/38/39 toc09
TEMPERATURE (°C)
tON/tOFF (ns)
603510-15
10
20
30
40
50
60
0
-40 85
tON, V+ = 3.0V tON, V+ = 5.0V
tOFF, V+ = 5.0V tOFF, V+ = 3.0V
RISE/FALL-TIME DELAY
vs. SUPPLY VOLTAGE
MAX4737/38/39 toc10
SUPPLY VOLTAGE (V)
OUTPUT RISE/FALL-TIME DELAY (ps)
4.53.52.5
0.5
1.0
1.5
2.0
2.5
3.0
0
1.5 5.5
INPUT RISE/FALL TIME = 15ns
FIGURE 3, CL = 50pF
RISE DELAY
FALL DELAY
RISE/FALL-TIME DELAY
vs. TEMPERATURE
MAX4737/38/39 toc11
TEMPERATURE (°C)
OUTPUT RISE/FALL-TIME DELAY (ns)
603510-15
0.5
1.0
1.5
2.0
0
-40 85
INPUT RISE/FALL TIME = 15ns
FIGURE 3, CL = 50pF
V+ = 4.2V
RISE DELAY FALL DELAY
MAX4737/MAX4738/MAX4739
4.5
Ω
Quad SPST Analog Switches in UCSP
_______________________________________________________________________________________ 7
RISE TIME TO FALL TIME MISMATCH
vs. SUPPLY VOLTAGE
MAX4737/38/39 toc12
SUPPLY VOLTAGE (V)
MISMATCH (ps)
4.53.52.5
100
200
300
400
0
1.5 5.5
INPUT RISE/FALL TIME = 15ns
FIGURE 3, CL = 50pF
RISE TIME TO FALL TIME MISMATCH
vs. TEMPERATURE
MAX4737/38/39 toc13
TEMPERATURE (°C)
MISMATCH (ps)
603510-15
50
100
150
200
0
-40 85
INPUT RISE/FALL TIME = 15ns
FIGURE 3, CL = 50pF
V+ = 4.2V
SKEW vs. SUPPLY VOLTAGE
MAX4737/38/39 toc14
SUPPLY VOLTAGE (V)
SKEW (ps)
4.53.52.5
100
200
300
400
0
1.5 5.5
INPUT RISE/FALL TIME = 15ns
FIGURE 3, CL = 50pF
SKEW vs. TEMPERATURE
MAX4737/38/39 toc15
TEMPERATURE (°C)
SKEW (ps)
603510-15
50
100
150
200
0
-40 85
INPUT RISE/FALL TIME = 15ns
FIGURE 3, CL = 50pF
V+ = 4.2V
FREQUENCY RESPONSE
MAX4737/38/39 toc16
FREQUENCY (MHz)
ON-LOSS (dB)
10.01
-120
-100
-80
-60
-40
-20
0
20
-140
0.0001 100
V+ = 3V/5V
ON-LOSS
OFF-ISOLATION
CROSSTALK
Typical Operating Characteristics (continued)
(TA = +25°C, unless otherwise noted.)
MAX4737/MAX4738/MAX4739
4.5
Ω
Quad SPST Analog Switches in UCSP
8 _______________________________________________________________________________________
PIN
MAX4737 MAX4738 MAX4739
UCSP TSSOP THIN
QFN UCSP TSSOP THIN
QFN UCSP TSSOP THIN
QFN
NAME FUNCTION
D2 1 15 — — — D2 1 15 NO1 Analog-Switch Normally Open
Terminal
— — — D2 1 15 — — — NC1 Analog-Switch Normally Closed
Terminal
D1 2 1 D1 2 1 D1 2 1 COM1 Analog-Switch Common Terminal
C1 3 2 ——————NO2
Analog-Switch Normally Open
Terminal
— — — C1 3 2 C1 3 2 NC2 Analog-Switch Normally Closed
Terminal
B1 4 3 B1 4 3 B1 4 3 COM2 Analog-Switch Common Terminal
A1 5 4 A1 5 4 A1 5 4 IN2 Logic-Control Digital Input
A2 6 5 A2 6 5 A2 6 5 IN3 Logic-Control Digital Input
B3 7 6 B3 7 6 B3 7 6 GND Ground. Connect to digital ground.
A3 8 7 — — — A3 8 7 NO3 Analog-Switch Normally Open
Terminal
— — — A3 8 7 — — — NC3 Analog-Switch Normally Closed
Terminal
A4 9 9 A4 9 9 A4 9 9 COM3 Analog-Switch Common Terminal
B4 10 10 B4 10 10 B4 10 10 COM4 Analog-Switch Common Terminal
Pin Description
Typical Operating Characteristics (continued)
(TA = +25°C, unless otherwise noted.)
TOTAL HARMONIC DISTORTION
vs. FREQUENCY
MAX4737/38/39 toc17
FREQUENCY (Hz)
THD (%)
10k1k100
0.1
10 100k
1
0.01
V+ = 3V
RL = 600Ω
LOGIC THRESHOLD vs. SUPPLY VOLTAGE
MAX4737/38/39 toc18
SUPPLY VOLTAGE (V)
LOGIC THRESHOLD (V)
5.04.54.03.53.02.52.0
0.4
0.8
1.2
1.6
2.0
0
1.5 5.5
VTH+
VTH-
MAX4737/MAX4738/MAX4739
4.5
Ω
Quad SPST Analog Switches in UCSP
_______________________________________________________________________________________ 9
Detailed Description
The MAX4737/MAX4738/MAX4739 quad SPST analog
switches operate from a single +1.8V to +5.5V supply.
The MAX4737/MAX4738/MAX4739 offer excellent AC
characteristics, <0.5nA leakage current, less than 1ns
differential skew, and 15pF on-channel capacitance. All
of these devices are CMOS-logic compatible with V+ to
GND signal handling capability.
The MAX4737/MAX4738/MAX4739 are USB-complaint
switches that provide 4.5Ω(max) on-resistance and
15pF on-channel capacitance to maintain signal integri-
ty. At 12Mbps (USB full-speed data rate specification),
the MAX4737/MAX4738/MAX4739 introduce less than
2ns propagation delay between input and output sig-
nals and less than 0.5ns change in skew for the output
signals (see Figure 4).
The MAX4737 has four normally open (NO) switches, the
MAX4738 has four normally closed (NC) switches, and
the MAX4739 has two NO switches and two NC switches.
Applications Information
Digital Control Inputs
The MAX4737/MAX4738/MAX4739 logic inputs accept
up to +5.5V regardless of supply voltage. For example,
with a +3.3V supply, IN_ can be driven low to GND and
high to +5.5V allowing for mixing of logic levels in a
system. Driving the control logic inputs rail-to-rail mini-
mizes power consumption. For a +1.8V supply voltage,
the logic thresholds are 0.5V (low) and 1.4V (high); for
a +5V supply voltage, the logic thresholds are 0.8V
(low) and 2.0V (high).
Analog Signal Levels
Analog signals that range over the entire supply voltage
(V+ to GND) are passed with very little change in on-resis-
tance (see Typical Operating Characteristics). The switch-
es are bidirectional, so the NO_, NC_, and COM_ pins can
be either inputs or outputs.
Power-Supply Bypassing
Power-supply bypassing improves noise margin and
prevents switching noise from propagating from the V+
supply to other components. A 0.1µF capacitor connect-
ed from V+ to GND is adequate for most applications.
UCSP Applications Information
For the latest application details on UCSP construction,
dimensions, tape carrier information, PC board tech-
niques, bump-pad layout, and recommended reflow
temperature profile, as well as the latest information on
reliability testing results, refer to the Application Note:
UCSP—A Wafer-Level Chip-Scale Package on Maxim’s
web site at www.maxim-ic.com/ucsp.
PIN
MAX4737 MAX4738 MAX4739
UCSP TSSOP THIN
QFN UCSP TSSOP THIN
QFN UCSP TSSOP THIN
QFN
NAME FUNCTION
C4 11 11 — — — — — — NO4 Analog-Switch Normally Open
Terminal
— — — C4 11 11 C4 11 11 NC4 Analog-Switch Normally Closed
Terminal
D4 12 12 D4 12 12 D4 12 12 IN4 Logic-Control Digital Input
D3 13 13 D3 13 13 D3 13 13 IN1 Logic-Control Digital Input
C2 14 14 C2 14 14 C2 14 14 V+ Positive Analog Supply
— — 8, 16 — — 8, 16 — — 8, 16 N.C. No Connection. Not internally
connected.
Pin Description (continued)
MAX4737/MAX4738/MAX4739
4.5
Ω
Quad SPST Analog Switches in UCSP
10 ______________________________________________________________________________________
Test Circuits/Timing Diagrams
50%
LOGIC
INPUT
RL
COM_
GND
IN_
CL INCLUDES FIXTURE AND STRAY CAPACITANCE.
VOUT = VCOM
VN_ VOUT
VIL
VIH
tOFF
0V
NO_
OR NC_
0.9 x V0UT 0.9 x VOUT
tON
VOUT
SWITCH
OUTPUT
LOGIC
INPUT
LOGIC INPUT WAVEFORMS INVERTED FOR SWITCHES
THAT HAVE THE OPPOSITE LOGIC SENSE.
V+
CL
V+
MAX4737/
MAX4738/
MAX4739
(RL
RL - RON )
Figure 1. Switching Time
LOGIC
INPUT
RL2
GND
CL INCLUDES FIXTURE AND STRAY CAPACITANCE.
NO_
IN_
NC_ VOUT2
V+
V+
CL2
MAX4739
RL1 CL1
VOUT1
VCOM1
VCOM2
50%
0.9 x V0UT1
0V
LOGIC
INPUT
SWITCH
OUTPUT 2
(VOUT2)
0V
0.9 x VOUT2
tDtD
SWITCH
OUTPUT 1
(VOUT1)
COM2
COM1
VIL
VIH
Figure 2. Break-Before-Make Interval
MAX4737/MAX4738/MAX4739
4.5
Ω
Quad SPST Analog Switches in UCSP
______________________________________________________________________________________ 11
tskew_i
90%
50%
10%
90%
50%
10%
tfi
INPUT A
INPUT A-
tri
tskew_o
90%
50%
10%
90%
50%
10%
tfo
OUTPUT B
OUTPUT B-
tro
B-
CL
A-
Rs
AB
CL
TxD+
TxD-
Rs
Rs = 39Ω
CL = 50pF
DELAY DUE TO SWITCH FOR RISING INPUT AND RISING OUTPUT SIGNALS.
DELAY DUE TO SWITCH FOR FALLING INPUT AND FALLING OUTPUT SIGNALS.
CHANGE IN SKEW THROUGH THE SWITCH FOR OUTPUT SIGNALS.
CHANGE IN SKEW THROUGH THE SWITCH FOR INPUT SIGNALS.
|tskew_i|
|tskew_o|
|tfo - tfi|
|tro - tri|
Figure 3. Input/Output Skew Timing Diagram
Test Circuits/Timing Diagrams (continued)
MAX4737/MAX4738/MAX4739
4.5
Ω
Quad SPST Analog Switches in UCSP
12 ______________________________________________________________________________________
VGEN GND
COM_
CL
VOUT
V+ VOUT
IN
OFF ON OFF
∆VOUT
Q = (∆VOUT)(CL)
NC_
LOGIC INPUT WAVEFORMS INVERTED FOR SWITCHES
THAT HAVE THE OPPOSITE LOGIC SENSE.
OFF ON OFF
IN
VIL TO VIH
V+
RGEN
IN_
MAX4737/
MAX4738/
MAX4739
OR NO_
Figure 4. Charge Injection
V+
C = 0.1µF
NC_ or NO_
V+
IN_
0V OR V+
GND
COM_
50Ω*
ANALYZER
*USED ONLY FOR OFF-ISOLATION TEST.
SIGNAL
GENERATOR
0dBm MAX4737/
MAX4738/
MAX4739
Figure 5a. On-Loss and Off-Isolation
V+
C = 0.1µF
V+
0V OR V+
GND
ANALYZER
SIGNAL GENERATOR
0dBm COM1
IN1
NO2
0V TO V+
NO1
IN2
COM2
50Ω
N.C.
MAX4737/
MAX4738/
MAX4739
Figure 5b. Crosstalk Test Circuit
CAPACITANCE
METER
NC_ or NO_
COM_
GND
IN_ 0V OR V+
C = 0.1µFV+
f = 1MHz
V+
MAX4737/
MAX4738/
MAX4739
Figure 6. Channel Off-/On-Capacitance
Test Circuits/Timing Diagrams (continued)
Chip Information
TRANSISTOR COUNT: 361
PROCESS: CMOS
MAX4737/MAX4738/MAX4739
4.5
Ω
Quad SPST Analog Switches in UCSP
______________________________________________________________________________________ 13
Pin Configurations/Functional Diagrams/Truth Tables (continued)
14
13
12
11
10
9
8
1
2
3
4
5
6
7
MAX4737
TSSOP
V+
IN1
IN4
NO4
COM4
COM3
NO3
COM2
NO2
COM1
NO1
GND
IN3
IN2
TOP VIEW
INPUT SWITCH STATE
LOW
HIGH
OFF
ON
14
13
12
11
10
9
8
1
2
3
4
5
6
7
MAX4738
TSSOP
V+
IN1
IN4
NC4
COM4
COM3
NC3
COM2
NC2
COM1
NC1
GND
IN3
IN2
INPUT SWITCH STATE
LOW
HIGH
ON
OFF
14
13
12
11
10
9
8
1
2
3
4
5
6
7
MAX4739
TSSOP
V+
IN1
IN4
NC4
COM4
COM3
NO3
COM2
NC2
COM1
NO1
GND
IN3
IN2
INPUT NO1, NO3
LOW
HIGH
OFF
ON
NC2, NC4
ON
OFF
16 15 14 13
N.C.
NO1
V+
IN1
9
10
11
12
COM3
COM4
NO4
IN4
4
3
2
1
IN2
COM2
NO2
COM1
5678
IN3
GND
NO3
N.C.
MAX4737
QFN
16 15 14 13
N.C.
NC1
V+
IN1
9
10
11
12
COM3
COM4
NC4
IN4
4
3
2
1
IN2
COM2
NC2
COM1
5678
IN3
GND
NC3
N.C.
MAX4738
QFN
16 15 14 13
N.C.
NO1
V+
IN1
9
10
11
12
COM3
COM4
NC4
IN4
4
3
2
1
IN2
COM2
NC2
COM1
5678
IN3
GND
NO3
N.C.
MAX4739
QFN
INPUT NO1, NO3
LOW
HIGH
OFF
ON
NC2, NC4
ON
OFF
INPUT SWITCH STATE
LOW
HIGH
ON
OFF
INPUT SWITCH STATE
LOW
HIGH
OFF
ON
MAX4737/MAX4738/MAX4739
4.5
Ω
Quad SPST Analog Switches in UCSP
14 ______________________________________________________________________________________
Package Information
(The package drawing(s) in this data sheet may not reflect the most current specifications. For the latest package outline information,
go to www.maxim-ic.com/packages.)
16L,UCSP.EPS
H1
1
21-0101
PACKAGE OUTLINE, 4x4 UCSP
MAX4737/MAX4738/MAX4739
4.5
Ω
Quad SPST Analog Switches in UCSP
______________________________________________________________________________________ 15
Package Information (continued)
(The package drawing(s) in this data sheet may not reflect the most current specifications. For the latest package outline information,
go to www.maxim-ic.com/packages.)
24L QFN THIN.EPS
C
1
2
21-0139
PACKAGE OUTLINE
12, 16, 20, 24L THIN QFN, 4x4x0.8mm
C
2
2
21-0139
PACKAGE OUTLINE
12, 16, 20, 24L THIN QFN, 4x4x0.8mm
Package Information (continued)
(The package drawing(s) in this data sheet may not reflect the most current specifications. For the latest package outline information,
go to www.maxim-ic.com/packages.)
TSSOP4.40mm.EPS
MAX4737/MAX4738/MAX4739
4.5
Ω
Quad SPST Analog Switches in UCSP
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.
16 ____________________Maxim Integrated Products, 120 San Gabriel Drive, Sunnyvale, CA 94086 408-737-7600
© 2004 Maxim Integrated Products Printed USA is a registered trademark of Maxim Integrated Products.
