19-3376; Rev 1; 1/05
Quad SPST, High-Bandwidth, Signal Line
Protection Switch
General Description
The MAX4854H/MAX4854HL analog switches operate
from a single +2V to +5.5V supply and can handle sig-
nals greater than the supply rail. These devices feature
four low on-resistance (7Ω) single-pole/single-throw
(SPST) switches, with 27.5pF on-capacitance, making
them ideal for data signals. If the input signal exceeds the
supply rail, the switches become high impedance and
prevent the signal from feeding through to the output.
The MAX4854H/MAX4854HL are available in the
space-saving (3mm x 3mm), 16-pin, thin QFN package
and operate over the extended (-40°C to +85°C) tem-
perature range.
Features
o
USB 2.0 Full Speed (12MB) and USB 1.1 Signal
Switching
o
Overvoltage Protection if Signal Exceeds V
CC
o
150MHz -3dB Bandwidth
o
27.5pF On-Capacitance
o
+2V to +5.5V Supply Range
o
7Ω On-Resistance
o
Low 10µA Supply Current
o
1.8V Logic Compatible
o
Available in a Space-Saving (3mm x 3mm)
16-Pin TQFN Package
MAX4854H/MAX4854HL
Applications
USB Switching
High-Bandwidth Data Switching
Cellular Phones
Notebook Computers
PDAs and Other Handheld Devices
Ordering Information
PART
MAX4854HETE
TEMP RANGE
-40°C to +85°C
PIN-
PACKAGE
16 TQFN-EP*
16 TQFN-EP*
TOP
MARK
ACD
ACX
MAX4854HLETE
-40°C to +85°C
*EP
= Exposed paddle.
Block Diagram/Truth Table
Pin Configuration
V
CC
14
IN1
MAX4854H
MAX4854H
MAX4854HL
NO1 (NC1)
7Ω
IN_
COM1
IN1
COM2
0
1
NO_
OFF
ON
N.C.
IN2
2
3
4
NO1 (NC1)
1
16
15
13
IN4
12 COM4
11 N.C.
10 NO4 (NC4)
9
IN3
8
COM3
TOP VIEW
SWITCHES SHOWN
FOR LOGIC 0 INPUT
COM1
5
NO2 (NC2)
NO2 (NC2)
7Ω
MAX4854H
MAX4854HL
IN2
COM3
MAX4854HL
IN_
IN3
0
ON
OFF
COM4
1
NC_
COM2
NO3 (NC3)
7Ω
6
GND
7
NO3 (NC3)
NO4 (NC4)
7Ω
IN4
SWITCHES SHOWN
FOR LOGIC 1 INPUT
THIN QFN
CONNECT EXPOSED PADDLE TO PC BOARD GROUND.
( ) INDICATES THE MAX4854HL
( ) INDICATES THE MAX4854HL
________________________________________________________________
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.
Quad SPST, High-Bandwidth, Signal Line
Protection Switch
MAX4854H/MAX4854HL
ABSOLUTE MAXIMUM RATINGS
V
CC
, IN_, COM_, NO_, NC_ to GND (Note 1) ...........-0.3V to +6.0V
Closed Switch Continuous Current COM_, NO_, NC_.........±50mA
Peak Current COM_, NO_, NC_
(pulsed at 1ms, 50% duty cycle) ....................................±100mA
Peak Current COM_, NO_, NC_
(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 NO_/NC_ or COM_ exceeding GND are clamped by internal diodes. Signals on IN exceeding GND are clamped
by an internal diode. Limit the forward-diode current to the 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_ or NC_ Off-Leakage
Current
COM_ On-Leakage Current
DYNAMIC CHARACTERISTICS
Signal Over Rail to High-Z
Switching Time
High-Z to Low-Z Switching
Time
Skew (Note 3)
Propagation Delay (Note 3)
Turn-On Time
t
SKEW
t
PD
t
ON
V
NO_
or V
NC_
= V
CC
to (V
CC
+ 0.5V), V
CC
< 5V
(Figure 1)
V
NO_
or V
NC_
= (V
CC
+ 0.5V) to V
CC
, V
CC
< 5V
(Figure 1)
R
S
= 39Ω, C
L
= 50pF (Figure 2)
R
S
= 39Ω, C
L
= 50pF (Figure 2)
V
CC
= 3V, V
NO_
or V
NC_
=
1.5V, R
L
= 300Ω, C
L
= 50pF
(Figure 1)
V
CC
= 3V, V
NO_
or V
NC_
=
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
30
0.5
0.5
0.15
0.9
40
1
1
1
2
60
ns
100
40
ns
60
µs
µs
ns
ns
V
NO_
,
V
COM_
R
ON
V
CC
= 3V, I
COM_
= 10mA,
V
NO_
or V
NC_
= 0 to V
CC
V
CC
= 3V, I
COM
= 10mA, or
V
NO_
or V
NC_
= 1.5V
V
CC
= 3V, I
COM_
= 10mA,
V
NO_
or V
NC_
= 1V, 2V, 3V
V
CC
= 5.5V, V
NO_
or V
NC_
= 1V
or 4.5V, V
COM_
= 4.5V or 1V
V
CC
= 5.5V; V
NO_
or V
NC_
=
1V, 4.5V, or floating; V
COM_
=
1V, 4.5V, or floating
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
2.5
0.2
0
7
V
CC
9
10
0.4
Ω
0.5
3.75
4
+2
+10
+2
nA
+12.5
Ω
nA
V
Ω
SYMBOL
V
CC
I
CC
V
CC
= 5.5V, V
IN_
= 0V or V
CC
CONDITIONS
MIN
2.0
10
TYP
MAX
5.5
20
UNITS
V
µA
∆R
ON
R
FLAT
I
OFF
I
ON
Turn-Off Time
t
OFF
2
_______________________________________________________________________________________
Quad SPST, High-Bandwidth, Signal Line
Protection Switch
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
Charge Injection
Off-Isolation (Note 6)
Crosstalk
-3dB Bandwidth
Total Harmonic Distortion
NO_ Off-Capacitance
COM On-Capacitance
DIGITAL I/O (IN_)
Input-Logic High Voltage
Input-Logic Low Voltage
Input Leakage Current
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
Q
V
ISO
V
CT
BW
THD
C
OFF
C
ON
CONDITIONS
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)
f = 20Hz to 20kHz, V
COM_
= 1V + 2V
P-P
, R
L
= 600Ω
f = 1MHz (Figure 5)
f = 1MHz (Figure 5)
MIN
TYP
8
-80
-95
150
0.04
12
27.5
MAX
UNITS
pC
dB
dB
MHz
%
pF
pF
MAX4854H/MAX4854HL
Note 2:
Specifications are 100% tested at T
A
= +85°C only, and guaranteed by design and characterization over the specified
temperature 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
MAX4854H toc01
ON-RESISTANCE vs. COM VOLTAGE
MAX4854H 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
2.0
1.5
T
A
= -40°C
0
1
2
3
4
5
T
A
= +25°C
T
A
= +85°C
MAX4854H toc03
45
40
35
ON-RESISTANCE (Ω)
30
25
20
15
10
5
0
0
2
4
6
COM VOLTAGE (V)
V
CC
= 2.3V
V
CC
= 2.5V
V
CC
= 3.0V
V
CC
= 5.0V
V
CC
= 2.0V
V
CC
= 1.8V
8
7
V
CC
= 3.0V
T
A
= +85°C
5.5
ON-RESISTANCE (Ω)
6
5
T
A
= +25°C
4
T
A
= -40°C
3
2
0
0.5
1.0
1.5
2.0
2.5
3.0
COM VOLTAGE (V)
COM VOLTAGE (V)
_______________________________________________________________________________________
3
Quad SPST, High-Bandwidth, Signal Line
Protection Switch
MAX4854H/MAX4854HL
Typical Operating Characteristics (continued)
(V
CC
= 3.0V, T
A
= +25°C, unless otherwise noted.)
SUPPLY CURRENT vs. SUPPLY VOLTAGE
MAX4854H toc04
TURN-ON/TURN-OFF TIME
vs. SUPPLY VOLTAGE
MAX4854H toc05
TURN-ON/TURN-OFF TIME
vs. TEMPERATURE
MAX4854H toc06
7
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)
6
SUPPLY CURRENT (µA)
T
A
= -40°C
5
4
T
A
= +25°C
3
T
A
= +85°C
2
1.5
2.5
3.5
4.5
5.5
SUPPLY VOLTAGE (V)
1.5
2.5
3.5
4.5
5.5
TURN-ON/TURN-OFF TIME (ns)
-40
-15
10
35
60
85
SUPPLY VOLTAGE (V)
TEMPERATURE (°C)
LOGIC THRESHOLD vs. SUPPLY VOLTAGE
MAX4854H toc07
CHARGE INJECTION vs. COM VOLTAGE
MAX4854H toc08
LEAKAGE CURRENT vs. TEMPERATURE
1.4
LEAKAGE CURRENT (nA)
1.2
1.0
0.8
0.6
0.4
0.2
COM OFF-LEAKAGE
COM ON-LEAKAGE
MAX4854H toc09
1.6
40
1.6
1.4
LOGIC THRESHOLD (V)
V
IN
RISING
1.2
CHARGE INJECTION (pC)
30
V
CC
= 3V
20
V
CC
= 5V
1.0
V
IN
FALLING
0.8
10
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)
0
-40
-15
10
35
60
85
TEMPERATURE (°C)
FREQUENCY RESPONSE
MAX4854H toc10
TOTAL HARMONIC DISTORTION
vs. FREQUENCY
R
L
= 600Ω
MAX4854H toc11
SWITCH ENTERING
HIGH-IMPEDANCE STATE
20
0
-20
-40
ON-RESPONSE
1
MAX4854H toc12
V
CC
= 3.0V
V
NC
2V/div
0V
FREQUENCY RESPONSE (dB)
THD (%)
OFF-RESPONSE
-60
-80
-100
0.1
1
10
FREQUENCY (MHz)
100
1000
CROSSTALK
0.1
V
COM
0V
0.01
10
100
1k
FREQUENCY (Hz)
10k
100k
HI-Z
STATE
HI-Z
STATE
200µs/div
4
_______________________________________________________________________________________
Quad SPST, High-Bandwidth, Signal Line
Protection Switch
Pin Description
PIN
1, 5, 7, 10
1, 5, 7, 10
2, 11
3
4
6
8
9
12
13
14
15
16
—
NAME
FUNCTION
NO1, NO2,
Normally Open Terminals for Analog Switch (MAX4854H)
NO3, NO4
NC1, NC2,
Normally Closed Terminals for Analog Switch (MAX4854HL)
NC3, NC4
N.C.
IN2
COM2
GND
COM3
IN3
COM4
IN4
V
CC
IN1
COM1
EP
No Connection. Internally not connected.
Digital Control Input for Analog Switch 2. A logic-low (MAX4854H) or logic-high (MAX4854HL) on IN2
opens switch 2 and a logic-high (MAX4854H) or logic-low (MAX4854HL) on IN2 connects COM2 to NO2.
Common Terminal for Analog Switch 2
Ground
Common Terminal for Analog Switch 3
Digital Control Input for Analog Switch 3. A logic-low (MAX4854H) or logic-high (MAX4854HL) on IN3
opens switch 3 and a logic-high (MAX4854H) or logic-low (MAX4854HL) on IN3 connects COM3 to NO3.
Common Terminal for Analog Switch 4
Digital Control Input for Analog Switch 4. A logic-low (MAX4854H) or logic-high (MAX4854HL) on IN4
opens switch 4 and a logic-high (MAX4854H) or logic-low (MAX4854HL) on IN4 connects COM4 to NO4.
Supply Voltage. Bypass V
CC
to GND with a 0.01µF capacitor as close to the pin as possible.
Digital Control Input for Analog Switch 1. A logic-low (MAX4854H) or logic-high (MAX4854HL) on IN1
opens switch 1 and a logic-high (MAX4854H) or logic-low (MAX4854HL) on IN1 connects COM1 to NO1.
Common Terminal for Analog Switch 1
Exposed Paddle. Connect to PC board ground plane.
MAX4854H/MAX4854HL
Detailed Description
The MAX4854H/MAX4854HL quad SPST switches have
low on-resistance, operate from a +2V to +5.5V supply,
and are fully specified for nominal 3.0V applications.
These devices feature overvoltage protection by
putting the switch into high-impedance mode when the
switch input exceeds V
CC
.
These switches have low 27.5pF on-channel capaci-
tance, which allows for 12Mbps switching of the data sig-
nals for USB 2.0 full speed/1.1 applications. The
MAX4854H/MAX4854HL are designed to switch D+ and
D- USB signals with a guaranteed skew of less than 1ns
(see Figure 2) as measured from 50% of the input signal
to 50% of the output signal.
high to +5.5V, allowing for mixing of logic levels in a
system. Driving IN_ rail-to-rail minimizes power con-
sumption. For a +2V 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 1.8V (high).
Analog Signal Levels
The on-resistance of these switches changes very little
for analog input signals across the entire supply volt-
age range (see the
Typical Operating Characteristics).
The switches are bidirectional, so the NO_ and COM_
pins can be either inputs or outputs.
Power-Supply Sequencing
Caution:
Do not exceed the absolute maximum ratings
because stresses beyond the listed ratings may cause
permanent damage to the device.
Proper power-supply sequencing is recommended for
all CMOS devices. Always apply V
CC
before applying
analog signals, especially if the analog signal is not
current limited.
Applications Information
Digital Control Inputs
The logic inputs (IN_) accept up to +5.5V even if the
supply voltages are below this level. For example, with a
+3.3V V
CC
supply, IN_ can be driven low to GND and
_______________________________________________________________________________________
5
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