19-3472; Rev 0; 10/04
7
Ω
Quad SPST Switches
with Over-Rail Signal Handling
General Description
The MAX4854 quad single-pole/single-throw (SPST)
switch operates from a single +2V to +5.5V supply and
can handle signals greater than the supply rail. This
switch features low 7Ω on-resistance with 30pF on-
capacitance, making it ideal for switching data signals.
For over-rail applications, this device passes signals
greater than the positive supply (up to +5.5V) through
the switch without distortion.
The MAX4854 is available in the space-saving, 16-pin,
3mm x 3mm thin QFN package and operates over the
-40°C to +85°C extended temperature range.
♦
Switches Signals Greater than V
CC
♦
7Ω On-Resistance
♦
30pF On-Capacitance
♦
150MHz, -3dB Bandwidth
♦
1.8V Logic Compatibility
♦
+2V to +5.5V Supply Range
♦
Low 0.01µA Supply Current
♦
Available in a Space-Saving, 3mm x 3mm,
16-Pin TQFN Package
Features
♦
USB 2.0 Full Speed (12Mbps) and USB 1.1 Signal
Switching
MAX4854
Applications
USB Switching
Cellular Phones
Notebook Computers
PDAs and Other Handheld Devices
PART
MAX4854ETE
Ordering Information
TEMP RANGE
-40°C to +85°C
PIN-
PACKAGE
16 TQFN-EP*
TOP
MARK
ACE
*EP
= Exposed paddle.
Block Diagram/Truth Table
IN1
Pin Configuration
V
CC
14
IN4
13
12 COM4
11 N.C.
10 NO4
9
5
NO2
6
GND
7
NO3
8
COM3
IN3
TOP VIEW
16
COM1
NO1
1
2
3
4
N.C.
IN2
15
MAX4854
NO1
7Ω
TRUTH TABLE
IN_
0
1
NO_
OFF
ON
COM1
IN1
COM2
7Ω
IN2
COM2
COM3
7Ω
IN3
COM4
7Ω
IN4
MAX4854
NO2
NO3
SWITCHES SHOWN
FOR LOGIC "0" INPUT
NO4
3mm x 3mm THIN QFN
CONNECT EXPOSED PADDLE TO PC BOARD GROUND.
________________________________________________________________
Maxim Integrated Products
1
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.
7
Ω
Quad SPST Switches
with Over-Rail Signal Handling
MAX4854
ABSOLUTE MAXIMUM RATINGS
V
CC
, IN_, COM_, NO_ to GND (Note 1) ................-0.3V to +6.0V
Closed-Switch Continuous Current COM_, NO_, NC_ .....±50mA
Peak Current COM_, NO_
(pulsed at 1ms, 50% duty cycle)................................±100mA
Peak Current COM_, NO_
(pulsed at 1ms, 10% duty cycle)................................±120mA
Continuous Power Dissipation (T
A
= +70°C)
16-Pin Thin QFN (derate 20.8mW/°C above +70°C) ....1667mW
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
Note 1:
Signals on IN_, NO_, or COM_ below GND 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
(V
CC
= +2.7V to +5.5V, T
A
= -40°C to +85°C, unless otherwise noted. Typical values are at V
CC
= +3.0V, T
A
= +25°C, unless other-
wise noted.) (Note 2)
PARAMETER
Supply Voltage
Supply Current
ANALOG SWITCH
Analog Signal Range
On-Resistance
On-Resistance Match
Between Channels
(Notes 3, 4)
On-Resistance
Flatness (Note 5)
NO_ Off-Leakage
Current
COM_ On-Leakage
Current
Skew (Note 3)
Propagation Delay
(Note 3)
Turn-On Time
Turn-Off Time
Charge Injection
Off-Isolation (Note 6)
Crosstalk
-3dB Bandwidth
BW
V
NO_
,
V
COM_
R
ON
V
CC
= +3V, I
COM_
= 10mA,
V
NO_
= 0 to +5.5V
V
CC
= +3V, I
COM
= 10mA,
V
NO_
= +1.5V
V
CC
= +3V; I
COM_
= 10mA;
V
NO_
= +1V, +2V, +3V
V
CC
= +5.5V, V
NO_
= +1V or +4.5V,
V
COM_
= +4.5V or +1V
V
CC
= +5.5V; V
NO_
= +1V, +4.5V, or
floating; V
COM_
= +1V, +4.5V, or floating
R
S
= 39Ω, C
L
= 50pF, Figure 2
R
S
= 39Ω, C
L
= 50pF, Figure 2
V
CC
= +3V, V
NO_
= +1.5V,
R
L
= 300Ω, C
L
= 50pF, Figure 1
V
CC
= +3V, V
NO_
= +1.5V,
R
L
= 300Ω, C
L
= 50pF, Figure 1
T
A
= +25°C
T
A
= -40°C to +85°C
T
A
= +25°C
T
A
= -40°C to +85°C
8
-80
-95
150
30
T
A
= +25°C
T
A
= -40°C to +85°C
T
A
= +25°C
T
A
= -40°C to +85°C
T
A
= +25°C
T
A
= -40°C to +85°C
T
A
= +25°C
T
A
= -40°C to +85°C
T
A
= +25°C
T
A
= -40°C to +85°C
-2
-10
-2
- 12.5
0.1
0.9
40
2.5
0.2
0
7
5.5
9
10
0.4
0.5
3.75
4.0
+2
+10
+2
+12.5
1
2
60
100
40
60
Ω
nA
nA
V
Ω
SYMBOL
V
CC
I
CC
V
CC
= +5.5V, V
IN_
= 0 or V
CC
CONDITIONS
MIN
2.0
0.01
TYP
MAX
5.5
1
UNITS
V
µA
∆R
ON
Ω
R
FLAT
I
OFF
I
ON
DYNAMIC CHARACTERISTICS
t
SKEW
t
PD
t
ON
t
OFF
Q
ns
ns
ns
ns
pC
dB
dB
MHz
V
COM_
= +1.5V, R
S
= 0Ω, C
L
= 1nF, Figure 3
f = 100kHz, V
COM_
= 1V
RMS
, R
L
= 50Ω, C
L
= 5pF, Figure 4
f = 1MHz, V
COM_
= 1V
RMS
, R
L
= 50Ω, C
L
= 5pF, Figure 4
Signal = 0dBm, R
L
= 50Ω, C
L
= 5pF, Figure 4
2
_______________________________________________________________________________________
7
Ω
Quad SPST Switches
with Over-Rail Signal Handling
ELECTRICAL CHARACTERISTICS (continued)
(V
CC
= +2.7V to +5.5V, T
A
= -40°C to +85°C, unless otherwise noted. Typical values are at V
CC
= +3.0V, T
A
= +25°C, unless other-
wise noted.) (Note 2)
PARAMETER
NO_ Off-Capacitance
COM On-Capacitance
Total Harmonic
Distortion
DIGITAL I/O (IN_)
Input Logic High
Voltage
Input Logic Low
Voltage
Input Leakage
V
IH
V
IL
I
IN
V
CC
= +2V to +3.6V
V
CC
= +3.6V to +5.5V
V
CC
= +2V to +3.6V
V
CC
= +3.6V to +5.5V
V
IN_
= 0 or +5.5V
-0.5
1.4
1.8
0.5
0.8
+0.5
V
V
µA
SYMBOL
C
OFF
C
ON
THD
f = 1MHz, Figure 5
f = 1MHz, Figure 5
f = 20Hz to 20kHz, V
COM_
= 1V +2V
P-P
, R
L
= 600Ω
CONDITIONS
MIN
TYP
13
30
0.04
MAX
UNITS
pF
pF
%
MAX4854
Note 2:
Specifications are 100% tested at T
A
= +85°C only, and guaranteed by design and characterization over the specified tem-
perature range.
Note 3:
Guaranteed by design and characterization; not production tested.
Note 4:
∆R
ON
= R
ON(MAX)
- R
ON(MIN)
.
Note 5:
Flatness is defined as the difference between the maximum and minimum value of on-resistance as measured over the
specified analog signal ranges.
Note 6:
Off-isolation = 20log
10
(V
COM_
/ V
NO_
), V
COM_
= output, V
NO_
= input to off switch.
Typical Operating Characteristics
(V
CC
= 3.0V, T
A
= +25°C, unless otherwise noted.)
ON-RESISTANCE vs. COM VOLTAGE
MAX4854 toc01
ON-RESISTANCE vs. COM VOLTAGE
MAX4854 toc02
ON-RESISTANCE vs. COM VOLTAGE
V
CC
= 5.0V
5.0
ON-RESISTANCE (Ω)
4.5
4.0
3.5
3.0
2.5
T
A
= +25°C
T
A
= +85°C
MAX4854 toc03
45
40
35
ON-RESISTANCE (Ω)
30
25
20
15
10
5
0
0
2
4
6
COM VOLTAGE (V)
V
CC
= 2.0V
V
CC
= 2.3V
V
CC
= 2.5V
V
CC
= 3.0V V
CC
= 5.0V
V
CC
= 1.8V
8
V
CC
= 3.0V
7
T
A
= +85°C
ON-RESISTANCE (Ω)
6
5
4
3
2
0
2
4
6
COM VOLTAGE (V)
T
A
= +25°C
T
A
= -40°C
5.5
2.0
1.5
0
1
2
3
T
A
= -40°C
4
5
6
COM VOLTAGE (V)
_______________________________________________________________________________________
3
7
Ω
Quad SPST Switches
with Over-Rail Signal Handling
MAX4854
Typical Operating Characteristics (continued)
(V
CC
= 3.0V, T
A
= +25°C, unless otherwise noted.)
TURN-ON/TURN-OFF TIME
vs. SUPPLY VOLTAGE
MAX4854 toc05
SUPPLY CURRENT vs. SUPPLY VOLTAGE
MAX4854 toc04
TURN-ON/TURN-OFF TIME
vs. TEMPERATURE
MAX4854 toc06
1.0
60
50
40
t
ON
30
20
t
OFF
10
0
34
32
t
ON
30
28
26
t
OFF
24
22
20
TURN-ON/TURN-OFF TIME (ns)
0.8
SUPPLY CURRENT (nA)
T
A
= +85°C
0.6
0.4
0.2
T
A
= +25°C
T
A
= -40°C
3.5
4.0
4.5
5.0
5.5
0
1.5
2.0
2.5
3.0
SUPPLY VOLTAGE (V)
1.5
2.5
3.5
4.5
TURN-ON/TURN-OFF TIME (ns)
5.5
-40
-15
10
35
60
85
SUPPLY VOLTAGE (V)
TEMPERATURE (°C)
LOGIC THRESHOLD vs. SUPPLY VOLTAGE
MAX4854 toc07
CHARGE INJECTION vs. COM VOLTAGE
MAX4854 toc08
LEAKAGE CURRENT vs. TEMPERATURE
1.4
LEAKAGE CURRENT (nA)
1.2
1.0
0.8
0.6
0.4
0.2
0
COM OFF-LEAKAGE
COM ON-LEAKAGE
MAX4854 toc09
1.6
30
1.6
1.4
LOGIC THRESHOLD (V)
V
IN
RISING
1.2
CHARGE INJECTION (pC)
20
V
CC
= 3V
1.0
V
IN
FALLING
0.8
10
V
CC
= 5V
0.6
1.5
2.5
3.5
4.5
5.5
SUPPLY VOLTAGE (V)
0
0
1
2
3
4
5
COM VOLTAGE (V)
-40
-15
10
35
60
85
TEMPERATURE (°C)
FREQUENCY RESPONSE
MAX4854 toc10
TOTAL HARMONIC DISTORTION
vs. FREQUENCY
R
L
= 600Ω
MAX4854 toc11
SWITCH PASSING SIGNALS
ABOVE SUPPLY VOLTAGE
MAX4854 toc12
20
0
-20
-40
-60
ON-RESPONSE
1
V
CC
= 3.0V
V
NC
2V/div
FREQUENCY RESPONSE (dB)
THD (%)
0V
0.1
OFF-RESPONSE
V
COM
-80
-100
0.1
1
10
FREQUENCY (MHz)
100
1000
CROSSTALK
0V
0.01
10
100
1k
FREQUENCY (Hz)
10k
100k
200µs/div
4
_______________________________________________________________________________________
7
Ω
Quad SPST Switches
with Over-Rail Signal Handling
Pin Description
PIN
1
2, 11
3
4
5
6
7
8
9
10
12
13
14
15
16
EP
NAME
NO1
N.C.
IN2
COM2
NO2
GND
NO3
COM3
IN3
NO4
COM4
IN4
V
CC
IN1
COM1
GND
Normally Open Terminal for Analog Switch 1
No Connection. Not internally connected.
Digital Control Input for Analog Switch 2. A logic-low on IN2 disconnects COM2 from NO2 and a
logic-high connects COM2 to NO2.
Common Terminal for Analog Switch 2
Normally Open Terminal for Analog Switch 2
Ground
Normally Open Terminal for Analog Switch 3
Common Terminal for Analog Switch 3
Digital Control Input for Analog Switch 3. A logic-low on IN3 disconnects COM3 from NO3 and a
logic-high connects COM3 to NO3.
Normally Open Terminal for Analog Switch 4
Common Terminal for Analog Switch 4
Digital Control Input for Analog Switch 4. A logic-low on IN4 disconnects COM4 from NO4 and a
logic-high connects COM4 to NO4.
Supply Voltage. Bypass to GND with a 0.01µF capacitor as close to the pin as possible.
Digital Control Input for Analog Switch 1. A logic-low on IN1 disconnects COM1 from NO1 and a
logic-high connects COM1 to NO1.
Common Terminal for Analog Switch 1
Exposed Pad. Connect to ground.
FUNCTION
MAX4854
_______________________________________________________________________________________
5
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