MAXIM MAX4737EUD

19-2633; Rev 0; 10/02
4.5Ω Quad SPST Analog Switches in UCSP
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
Applications
Ordering Information
Battery-Operated Equipment
PART
Audio/Video-Signal Routing
TEMP RANGE
-40°C to +85°C
14 TSSOP
MAX4737EBE-T*
-40°C to +85°C
16 UCSP-16
MAX4738EUD
-40°C to +85°C
14 TSSOP
MAX4738EBE-T*
-40°C to +85°C
16 UCSP-16
MAX4739EUD
-40°C to +85°C
14 TSSOP
MAX4739EBE-T*
-40°C to +85°C
16 UCSP-16
MAX4737EUD
Low-Voltage Data-Acquisition Systems
Sample-and-Hold Circuits
Data-Acquisition Systems
Communications Circuits
PIN/BUMPPACKAGE
TOP
MARK
—
4737
—
4738
—
4739
Note: UCSP package requires special solder temperature profile described in the Absolute Maximum Ratings section.
*UCSP reliability is integrally linked to the user’s assembly methods, circuit board material, and environment. See the UCSP reliability notice in the UCSP Reliability section of this data sheet for
more information.
UCSP is a trademark of Maxim Integrated Products, Inc.
Rail-to-Rail is a registered trademark of Nippon Motorola, Ltd.
Pin Configurations/Functional Diagrams/Truth Tables
MAX4737
TOP VIEW
(BUMPS SIDE DOWN)
MAX4738
1
2
3
4
IN2
IN3
NO3
COM3
A
MAX4739
1
2
3
4
IN2
IN3
NC3
COM3
A
B
GND
COM4
C
V+
COM2
NO4
D
GND
COM4
NO1
IN1
UCSP
IN4
4
IN2
IN3
NO3
COM3
GND
COM4
COM2
C
NC2
V+
NC4
D
COM1
3
B
C
NO2
2
A
B
COM2
1
NC2
V+
COM1
NO1
IN_
LOW
HIGH
NO_
OFF
ON
NC_
ON
OFF
NC4
D
COM1
NC1
IN1
UCSP
IN4
IN1
IN4
UCSP
________________________________________________________________ Maxim Integrated Products
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.
1
MAX4737/MAX4738/MAX4739
General Description
The MAX4737/MAX4738/MAX4739 low-voltage, low onresistance (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 4.5Ω RON
(max) with 1.2Ω flatness and 0.4Ω matching 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 t ON <80ns and t OFF <40ns at
+2.7V. The digital logic inputs are +1.8V logic compatible 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
package.
MAX4737/MAX4738/MAX4739
4.5Ω Quad SPST Analog Switches in UCSP
ABSOLUTE MAXIMUM RATINGS
(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
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) (Note 2)
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 maximum current rating.
Note 2: This device is constructed using a unique set of packaging techniques that impose a limit on the thermal profile the device
can be exposed to during board level solder attach and rework. This limit permits only the use of the solder profiles recommended in the industry standard specification, JEDEC 020A, paragraph 7.6, table 3 for IR/VPR and convection reflow.
Preheating is required. Hand or wave soldering is not allowed.
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 noted. Typical values are at V+ = +3.0V,
TA = +25°C, unless otherwise noted.) (Notes 3, 4)
PARAMETER
Analog Signal Range
SYMBOL
CONDITIONS
TA
VCOM_,
VNO_, VNC_
MIN
TYP
0
MAX
UNITS
V+
V
ANALOG SWITCH
+25°C
On-Resistance (Note 5)
RON
V+ = 2.7V, ICOM_ = 10mA;
VNO_ or VNC_ = 1.5V
∆RON
V+ = 2.7V, ICOM_ = 10mA;
VNO_ or VNC_ = 1.5V
3.0
TMIN to
TMAX
5
+25°C
On-Resistance Match Between
Channels (Notes 5, 6)
0.1
TMIN to
TMAX
RFLAT(ON)
V+ = 2.7V, ICOM_ = 10mA;
VNO_ or VNC_ = 1.0V, 1.5V, 2.0V
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
COM_ Off-Leakage Current
(Note 8)
ICOM_(OFF)
V+ = 3.6V, VCOM_ = 0.3V, 3.3V;
VNO_ or VNC_ = 3.3V, 0.3V
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
2
0.6
TMIN to
TMAX
-0.5
TMIN to
TMAX
-1
+25°C
-0.5
TMIN to
TMAX
-1
+25°C
-1
TMIN to
TMAX
-2
+0.01
_______________________________________________________________________________________
nA
+0.5
+1
+0.01
Ω
+0.5
+1
+0.01
Ω
1.2
1.5
+25°C
Ω
0.4
0.5
+25°C
On-Resistance Flatness (Note 7)
4.5
nA
+1
+2
nA
4.5Ω Quad SPST Analog Switches in UCSP
(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
TA
MIN
TYP
MAX
tON
VNO_, VNC_ = 1.5V;
RL = 300Ω, CL = 35pF, Figure 1
40
80
tOFF
VNO_, VNC_ = 1.5V;
RL = 300Ω, CL = 35pF, Figure 1
Break-Before-Make Time Delay
(MAX4739 Only) (Note 8)
tBBM
VNO_, VNC_ = 1.5V;
RL = 300Ω, CL = 35pF, Figure 2
Skew (Note 8)
tSKEW
RS = 39Ω, CL = 50pF, Figure 3
TMIN to
TMAX
0.15
VGEN = 2V, RGEN = 0Ω,
CL = 1.0nF, Figure 4
+25°C
5
UNITS
DYNAMIC CHARACTERISTICS
+25°C
Turn-On Time
TMIN to
TMAX
100
+25°C
Turn-Off Time
20
TMIN to
TMAX
Charge Injection
Q
Off-Isolation (Note 9)
Crosstalk (Note 10)
VISO
VCT
f = 10MHz; VNO_, VNC_ = 1VP-P;
RL = 50Ω, CL = 5pF, Figure 5a
TMIN to
TMAX
ns
8
ns
1
2
ns
pC
-55
+25°C
dB
f = 1MHz; VNO_, VNC_ = 1VP-P;
RL = 50Ω, CL = 5pF, Figure 5a
f = 10MHz; VNO_, VNC_ = 1VP-P;
RL = 50Ω, CL = 5pF, Figure 5b
40
50
+25°C
ns
-80
-80
+25°C
dB
f = 1MHz; VNO_, VNC_ = 1VP-P;
RL = 50Ω, CL = 5pF, Figure 5b
-110
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
%
+25°C
9
pF
+25°C
15
pF
NO_, NC_ Off-Capacitance
Switch On-Capacitance
CNO_(OFF),
f = 1MHz, Figure 6
CNC_(OFF)
CON
f = 1MHz, Figure 6
DIGITAL I/O
Input Logic High Voltage
VIH
TMIN to
TMAX
Input Logic Low Voltage
VIL
TMIN to
TMAX
Input Leakage Current
IIN
V+ = 3.6V, VIN_ = 0 or 5.5V
TMIN to
TMAX
1.4
-0.1
V
0.5
V
+0.1
µA
_______________________________________________________________________________________
3
MAX4737/MAX4738/MAX4739
ELECTRICAL CHARACTERISTICS—Single +3V Supply (continued)
MAX4737/MAX4738/MAX4739
4.5Ω Quad SPST Analog Switches in UCSP
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
TA
MIN
TMIN to
TMAX
1.8
TYP
MAX
UNITS
5.5
V
1
µA
SUPPLY
Supply Voltage Range
V+
Positive Supply Current
I+
V+ = 5.5V, VIN_ = 0V or V+
TMIN to
TMAX
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
Analog Signal Range
SYMBOL
CONDITIONS
VCOM_,
VNO_, VNC_
TA
MIN
TMIN to
TMAX
0
TYP
MAX
UNITS
V+
V
ANALOG SWITCH
+25°C
On-Resistance (Note 5)
RON
V+ = 4.2V; ICOM_ = 10mA;
VNO_ or VNC_ = 3.5V
∆RON
V+ = 4.2V; ICOM_ = 10mA;
VNO_ or VNC_ = 3.5V
1.7
TMIN to
TMAX
35
+25°C
On-Resistance Match Between
Channels (Notes 5, 6)
0.1
TMIN to
TMAX
RFLAT(ON)
V+ = 4.2V; ICOM_ = 10mA;
VNO_ or VNC_ = 1.0V, 2.0V, 3.5V
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
COM_ Off-Leakage Current
(Note 8)
ICOM_ (OFF)
V+ = 5.5V; VCOM_ = 1V, 4.5V;
VNO_ or VNC_ = 4.5V, 1V
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
Turn-On Time
tON
VNO_, VNC_ = 3.0V;
RL = 300Ω, CL = 35pF, Figure 1
Turn-Off Time
tOFF
VNO_, VNC_ = 3.0V;
RL = 300Ω, CL = 35pF, Figure 1
0.4
TMIN to
TMAX
+25°C
-0.5
-1
+25°C
-0.5
TMIN to
TMAX
-1
+25°C
-1
TMIN to
TMAX
-2
0.01
nA
+0.5
+1
0.01
Ω
+0.5
+1
0.01
Ω
1.2
1.5
TMIN to
TMAX
Ω
0.3
0.4
+25°C
On-Resistance Flatness (Note 7)
3.0
nA
+1
+2
nA
DYNAMIC CHARACTERISTICS
+25°C
TMIN to
TMAX
+25°C
4
30
80
100
20
TMIN to
TMAX
_______________________________________________________________________________________
ns
40
50
ns
4.5Ω Quad SPST Analog Switches in UCSP
(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
TA
MIN
+25°C
Break-Before-Make Time Delay
(MAX4739 Only) (Note 8)
tBBM
VNO_, VNC_ = 3.0V;
RL = 300Ω, CL = 35pF, Figure 2
Skew (Note 8)
tSKEW
RS = 39Ω, CL = 50pF, Figure 3
TMIN to
TMAX
TYP
MAX
UNITS
8
ns
1
TMIN to
TMAX
0.15
2
ns
DIGITAL I/O
Input Logic High Voltage
VIH
TMIN to
TMAX
Input Logic Low Voltage
VIL
TMIN to
TMAX
Input Leakage Current
IIN
V+ = 5.5V, VIN_ = 0V or V+
2.0
V
0.8
V
TMIN to
TMAX
-0.1
+0.1
µA
TMIN to
TMAX
1.8
5.5
V
1
µA
POWER SUPPLY
Power-Supply Range
V+
Positive Supply Current
I+
V+ = 5.5V, VIN_ = 0V or V+
TMIN to
TMAX
UCSP parts are 100% tested at +25°C only, and guaranteed by design over the specified temperature range. TSSOP 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 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.
Note 3:
_______________________________________________________________________________________
5
MAX4737/MAX4738/MAX4739
ELECTRICAL CHARACTERISTICS—Single +5V Supply (continued)
Typical Operating Characteristics
(TA = +25°C, unless otherwise noted.)
V+ = 2.5V
V+ = 3V
V+ = 4.2V
2
1
2
3
4
2
1
5
0.5
1.5
2.0
2.5
3.0
0
COM OFF-LEAKAGE
200
1000
V+ = 5V
800
LEAKAGE CURRENT (pA)
COM ON-LEAKAGE
100
2
0
60
600
COM ON-LEAKAGE
COM OFF-LEAKAGE
400
85
4
40
CL = 1nF
V+ = 5V
30
CL = 1nF
V+ = 3V
20
10
0
-40
-15
10
35
60
85
0
1
2
3
4
TEMPERATURE (°C)
TEMPERATURE (°C)
VCOM (V)
SUPPLY CURRENT vs. TEMPERATURE
SUPPLY CURRENT vs. LOGIC LEVEL
TURN-ON/OFF TIME
vs. SUPPLY VOLTAGE
V+ = 5V
3
2
V+ = 3V
1
V+ = 5V
60
40
-15
10
35
TEMPERATURE (°C)
60
85
60
tON
40
20
0
0
-40
80
tOFF
V+ = 3V
20
0
5
MAX4737/38/39 toc08
80
tON/tOFF (ns)
4
100
MAX4737/38/39 toc07
5
100
SUPPLY CURRENT (µA)
MAX4737/38/39 toc06
6
5
CHARGE INJECTION vs. VCOM
0
35
3
50
200
10
1
VCOM (V)
LEAKAGE CURRENT vs. TEMPERATURE
MAX4737/38/39 toc04a
400
LEAKAGE CURRENT (pA)
1.0
VCOM (V)
V+ = 3V
6
TA = -40°C
0
0
LEAKAGE CURRENT vs. TEMPERATURE
-15
TA = +85°C
TA = +25°C
2
1
500
-40
3
3
VCOM (V)
300
4
CHARGE INJECTION (pC)
0
TA = +85°C
TA = +25°C
V+ = 5V
TA = -40°C
V+ = 5V
0
4
MAX4737/38/39 toc04b
4
5
RON (Ω)
6
V+ = 3V
MAX4737/38/39 toc05
MAX4737/38/39 toc01
V+ = 1.8V
RON (Ω)
RON (Ω)
8
ON-RESISTANCE vs. VCOM
5
MAX4737/38/39 toc03
ON-RESISTANCE vs. VCOM
6
MAX4737/38/39 toc02
ON-RESISTANCE vs. VCOM
10
SUPPLY CURRENT (nA)
MAX4737/MAX4738/MAX4739
4.5Ω Quad SPST Analog Switches in UCSP
0
1
2
3
LOGIC LEVEL (V)
4
5
1.5
2.5
3.5
SUPPLY VOLTAGE (V)
_______________________________________________________________________________________
4.5
5.5
4.5Ω Quad SPST Analog Switches in UCSP
tOFF, V+ = 3.0V
10
RISE DELAY
1.0
0.5
0
-15
10
35
60
85
2.5
1.5
3.5
4.5
RISE TIME TO FALL TIME MISMATCH
vs. SUPPLY VOLTAGE
RISE TIME TO FALL TIME MISMATCH
vs. TEMPERATURE
50
2.5
3.5
5.5
4.5
85
200
0
-40
-15
SUPPLY VOLTAGE (V)
10
35
60
85
1.5
2.5
TEMPERATURE (°C)
INPUT RISE/FALL TIME = 15ns
FIGURE 3, CL = 50pF
V+ = 4.2V
4.5
5.5
FREQUENCY RESPONSE
20
100
50
V+ = 3V/5V
0
-20
ON-LOSS (dB)
150
3.5
SUPPLY VOLTAGE (V)
SKEW vs. TEMPERATURE
200
SKEW (ps)
60
100
0
1.5
35
300
100
0
10
INPUT RISE/FALL TIME = 15ns
FIGURE 3, CL = 50pF
SKEW (ps)
150
100
-15
400
MAX4737/38/39 toc13
INPUT RISE/FALL TIME = 15ns
FIGURE 3, CL = 50pF
V+ = 4.2V
MISMATCH (ps)
200
-40
SKEW vs. SUPPLY VOLTAGE
200
MAX4737/38/39 toc12
300
FALL DELAY
TEMPERATURE (°C)
SUPPLY VOLTAGE (V)
INPUT RISE/FALL TIME = 15ns
FIGURE 3, CL = 50pF
RISE DELAY
0.5
5.5
TEMPERATURE (°C)
400
1.0
0
0
-40
MISMATCH (ps)
FALL DELAY
1.5
MAX4737/38/39 toc16
tOFF, V+ = 5.0V
1.5
INPUT RISE/FALL TIME = 15ns
FIGURE 3, CL = 50pF
V+ = 4.2V
MAX4737/38/39 toc14
20
OUTPUT RISE/FALL-TIME DELAY (ns)
30
2.0
MAX4737/38/39 toc15
tON/tOFF (ns)
40
INPUT RISE/FALL TIME = 15ns
FIGURE 3, CL = 50pF
2.5
2.0
MAX4737/38/39 toc10
tON, V+ = 5.0V
3.0
OUTPUT RISE/FALL-TIME DELAY (ps)
tON, V+ = 3.0V
MAX4737/38/39 toc09
60
50
RISE/FALL-TIME DELAY
vs. TEMPERATURE
RISE/FALL-TIME DELAY
vs. SUPPLY VOLTAGE
MAX4737/38/39 toc11
TURN-ON/OFF TIME
vs. TEMPERATURE
ON-LOSS
-40
-60
OFF-ISOLATION
-80
-100
CROSSTALK
-120
0
-40
-15
10
35
TEMPERATURE (°C)
60
85
-140
0.0001
0.01
1
100
FREQUENCY (MHz)
_______________________________________________________________________________________
7
MAX4737/MAX4738/MAX4739
Typical Operating Characteristics (continued)
(TA = +25°C, unless otherwise noted.)
Typical Operating Characteristics (continued)
(TA = +25°C, unless otherwise noted.)
TOTAL HARMONIC DISTORTION
vs. FREQUENCY
0.1
1.6
LOGIC THRESHOLD (V)
V+ = 3V
RL = 600Ω
2.0
VTH+
MAX4737/38/39 toc18
LOGIC THRESHOLD vs. SUPPLY VOLTAGE
MAX4737/38/39 toc17
1
THD (%)
MAX4737/MAX4738/MAX4739
4.5Ω Quad SPST Analog Switches in UCSP
1.2
VTH0.8
0.4
0
0.01
10
100
1k
10k
1.5
100k
2.0
2.5
3.0
3.5
4.0
4.5
5.0
5.5
SUPPLY VOLTAGE (V)
FREQUENCY (Hz)
Pin Description
PIN
MAX4738
MAX4737
UCSP
8
TSSOP
MAX4739
UCSP
TSSOP
UCSP
NAME
FUNCTION
TSSOP
D2
1
—
—
D2
1
NO1
Analog-Switch Normally Open Terminal
—
—
D2
1
—
—
NC1
Analog-Switch Normally Closed Terminal
D1
2
D1
2
D1
2
COM1
C1
3
—
—
—
—
NO2
Analog-Switch Normally Open Terminal
—
—
C1
3
C1
3
NC2
Analog-Switch Normally Closed Terminal
B1
4
B1
4
B1
4
COM2
A1
5
A1
5
A1
5
IN2
Logic-Control Digital Input
A2
6
A2
6
A2
6
IN3
Logic-Control Digital Input
B3
7
B3
7
B3
7
GND
Ground. Connect to digital ground.
A3
8
—
—
A3
8
NO3
Analog-Switch Normally Open Terminal
—
—
A3
8
—
—
NC3
A4
9
A4
9
A4
9
COM3
Analog-Switch Common Terminal
Analog-Switch Common Terminal
Analog-Switch Common Terminal
Analog-Switch Common Terminal
Analog-Switch Normally Closed Terminal
B4
10
B4
10
B4
10
COM4
C4
11
—
—
—
—
NO4
Analog-Switch Normally Open Terminal
—
—
C4
11
C4
11
NC4
Analog-Switch Normally Closed Terminal
D4
12
D4
12
D4
12
IN4
Logic-Control Digital Input
D3
13
D3
11
D3
11
IN1
Logic-Control Digital Input
C2
14
C2
14
C2
14
V+
Positive Analog Supply
_______________________________________________________________________________________
4.5Ω Quad SPST Analog Switches in UCSP
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 integrity. At 12Mbps (USB full-speed data rate specification),
the MAX4737/MAX4738/MAX4739 introduce less than
2ns propagation delay between input and output signals 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 minimizes 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).
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 connected from V+ to GND is adequate for most applications.
UCSP Package Considerations
For general UCSP package information and PC layout
considerations, please refer to the Maxim Application
Note (Wafer-Level Chip-Scale Package).
UCSP Reliability
The chip-scale package (UCSP) represents a unique
packaging form factor that may not perform equally to a
packaged product through traditional mechanical reliability tests. UCSP reliability is integrally linked to the
user’s assembly methods, circuit board material, and
usage environment. The user should closely review
these areas when considering use of a UCSP package.
Performance through Operating Life Test and Moisture
Resistance remains uncompromised as it is primarily
determined by the wafer-fabrication process.
Mechanical stress performance is a greater consideration for a UCSP package. UCSPs are attached through
direct solder contact to the user’s PC board, foregoing
the inherent stress relief of a packaged product lead
frame. Solder joint contact integrity must be considered. Information on Maxim’s qualification plan, test
data, and recommendations are detailed in the UCSP
application note, which can be found on Maxim’s website at www.maxim-ic.com.
Analog Signal Levels
Analog signals that range over the entire supply voltage
(V+ to GND) are passed with very little change in on-resistance (see Typical Operating Characteristics). The switches are bidirectional, so the NO_, NC_, and COM_ pins can
be either inputs or outputs.
_______________________________________________________________________________________
9
MAX4737/MAX4738/MAX4739
Detailed Description
MAX4737/MAX4738/MAX4739
4.5Ω Quad SPST Analog Switches in UCSP
Test Circuits/Timing Diagrams
MAX4737/
MAX4738/
MAX4739
V+
V N_
LOGIC
INPUT
V+
COM_
NO_
V IH
50%
V IL
V OUT
OR NC_
RL
t OFF
CL
IN_
VOUT
GND
LOGIC
INPUT
SWITCH
OUTPUT
(
0.9 x VOUT
t ON
CL INCLUDES FIXTURE AND STRAY CAPACITANCE.
RL
RL - RON
VOUT = VCOM
0.9 x V0UT
0V
LOGIC INPUT WAVEFORMS INVERTED FOR SWITCHES
THAT HAVE THE OPPOSITE LOGIC SENSE.
)
Figure 1. Switching Time
V+
MAX4739
V+
VCOM1
VCOM2
COM1
VOUT2
NC_
COM2
RL2
IN_
LOGIC
INPUT
VOUT1
NO_
GND
CL2
RL1
LOGIC
INPUT
V IH
50%
V IL
CL1
SWITCH
OUTPUT 1
(VOUT1)
0.9 x V0UT1
0V
SWITCH
OUTPUT 2
(VOUT2)
CL INCLUDES FIXTURE AND STRAY CAPACITANCE.
0.9 x VOUT2
0V
tD
tD
Figure 2. Break-Before-Make Interval
10
______________________________________________________________________________________
4.5Ω Quad SPST Analog Switches in UCSP
tri
90%
50%
A
TxD+
B
INPUT A
10%
tskew_i
CL
Rs
INPUT A-
90%
50%
10%
tfi
tro
A-
TxDRs
Rs = 39Ω
CL = 50pF
B-
OUTPUT B
10%
90%
50%
tskew_o
CL
OUTPUT B-
90%
50%
10%
tfo
|tro - tri| DELAY DUE TO SWITCH FOR RISING INPUT AND RISING OUTPUT SIGNALS.
|tfo - tfi|
DELAY DUE TO SWITCH FOR FALLING INPUT AND FALLING OUTPUT SIGNALS.
|tskew_o| CHANGE IN SKEW THROUGH THE SWITCH FOR OUTPUT SIGNALS.
|tskew_i| CHANGE IN SKEW THROUGH THE SWITCH FOR INPUT SIGNALS.
Figure 3. Input/Output Skew Timing Diagram
______________________________________________________________________________________
11
MAX4737/MAX4738/MAX4739
Test Circuits/Timing Diagrams (continued)
MAX4737/MAX4738/MAX4739
4.5Ω Quad SPST Analog Switches in UCSP
Test Circuits/Timing Diagrams (continued)
V+
MAX4737/
MAX4738/
MAX4739
∆VOUT
V+
RGEN
VOUT
COM_
NC_
OR NO_
VOUT
IN
OFF
CL
V GEN
GND
OFF
ON
IN_
VIL TO VIH
IN
ON
OFF
OFF
Q = (∆V OUT )(C L )
LOGIC INPUT WAVEFORMS INVERTED FOR SWITCHES
THAT HAVE THE OPPOSITE LOGIC SENSE.
Figure 4. Charge Injection
V+
C = 0.1µF
C = 0.1µF
SIGNAL
GENERATOR
0dBm
V+
MAX4737/
MAX4738/
MAX4739
NC_ or NO_
50Ω*
SIGNAL GENERATOR
0dBm
V+
NO1
COM1
0V TO V+
COM_
GND
50Ω
IN1
0V OR V+
IN_
ANALYZER
MAX4737/
MAX4738/
MAX4739
V+
ANALYZER
IN2
NO2
COM2
GND
0V OR V+
N.C.
*USED ONLY FOR OFF-ISOLATION TEST.
Figure 5a. On-Loss and Off-Isolation
C = 0.1µF
Figure 5b. Crosstalk Test Circuit
Chip Information
V+
TRANSISTOR COUNT: 361
PROCESS: CMOS
V+
NC_ or NO_
MAX4737/
MAX4738/
MAX4739
IN_
CAPACITANCE
METER
0V OR V+
COM_
f = 1MHz
GND
Figure 6. Channel Off/On-Capacitance
12
______________________________________________________________________________________
4.5Ω Quad SPST Analog Switches in UCSP
TOP VIEW
MAX4737
MAX4739
MAX4738
NO1 1
14 V+
NC1 1
14 V+
NO1 1
14 V+
COM1 2
13 IN1
COM1 2
13 IN1
COM1 2
13 IN1
NO2 3
12 IN4
NC2 3
12 IN4
NC2 3
12 IN4
COM2 4
11 NO4
IN2 5
10 COM4
IN3 6
9 COM3
8 NO3
GND 7
COM2 4
11 NC4
IN2 5
10 COM4
IN3 6
9 COM3
8 NC3
GND 7
TSSOP
INPUT
LOW
SWITCH STATE
OFF
HIGH
ON
COM2 4
11 NC4
IN2 5
10 COM4
IN3 6
9 COM3
GND 7
8 NO3
TSSOP
TSSOP
INPUT
SWITCH STATE
INPUT
NO1, NO3
NC2, NC4
LOW
HIGH
ON
OFF
LOW
HIGH
OFF
ON
ON
OFF
______________________________________________________________________________________
13
MAX4737/MAX4738/MAX4739
Pin Configurations/Functional Diagrams/Truth Tables (continued)
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
MAX4737/MAX4738/MAX4739
4.5Ω Quad SPST Analog Switches in UCSP
14
______________________________________________________________________________________
4.5Ω Quad SPST Analog Switches in UCSP
TSSOP4.40mm.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.
Maxim Integrated Products, 120 San Gabriel Drive, Sunnyvale, CA 94086 408-737-7600 ____________________ 15
© 2002 Maxim Integrated Products
Printed USA
is a registered trademark of Maxim Integrated Products.
MAX4737/MAX4738/MAX4739
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.)
This datasheet has been download from:
www.datasheetcatalog.com
Datasheets for electronics components.