General Description
The MAX4854H/MAX4854HL analog switches operate
from a single +2V to +5.5V supply and can handle signals 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) temperature range.
Applications
USB Switching
High-Bandwidth Data Switching
Cellular Phones
Notebook Computers
PDAs and Other Handheld Devices
Features
♦ USB 2.0 Full Speed (12MB) and USB 1.1 Signal
Switching
♦ Overvoltage Protection if Signal Exceeds V
CC
♦ 150MHz -3dB Bandwidth
♦ 27.5pF On-Capacitance
♦ +2V to +5.5V Supply Range
♦ 7Ω On-Resistance
♦ Low 10µA Supply Current
♦ 1.8V Logic Compatible
♦ Available in a Space-Saving (3mm x 3mm)
16-Pin TQFN Package
MAX4854H/MAX4854HL
Quad SPST, High-Bandwidth, Signal Line
Protection Switch
________________________________________________________________ Maxim Integrated Products 1
TOP VIEW
16
1
2
3
4
12
11
10
9
15 14 13
5678
COM1
IN1
VCCIN4
COM4
N.C.
NO4 (NC4)
IN3
N.C.
IN2
COM2
NO2 (NC2)
GND
NO3 (NC3)
COM3
NO1 (NC1)
MAX4854H
MAX4854HL
THIN QFN
CONNECT EXPOSED PADDLE TO PC BOARD GROUND.
( ) INDICATES THE MAX4854HL
Pin Configuration
Ordering Information
MAX4854H
MAX4854HL
NO1 (NC1)
COM1
IN1
NO2 (NC2)
COM2
IN2
NO3 (NC3)
COM3
IN3
NO4 (NC4)
COM4
IN4
MAX4854H
IN_ NO_
0 OFF
1ON
SWITCHES SHOWN
FOR LOGIC 0 INPUT
MAX4854HL
IN_ NC_
0ON
1 OFF
SWITCHES SHOWN
FOR LOGIC 1 INPUT
( ) INDICATES THE MAX4854HL
7Ω
7Ω
7Ω
7Ω
Block Diagram/Truth Table
19-3376; Rev 1; 1/05
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.
*EP = Exposed paddle.
PART
TEMP RANGE
PINPACKAGE
TOP
MARK
MAX4854HETE
ACD
MAX4854HLETE
ACX
-40°C to +85°C 16 TQFN-EP*
-40°C to +85°C 16 TQFN-EP*
MAX4854H/MAX4854HL
Quad SPST, High-Bandwidth, Signal Line
Protection Switch
2 _______________________________________________________________________________________
ABSOLUTE MAXIMUM RATINGS
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.
VCC, 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
ELECTRICAL CHARACTERISTICS
(VCC= +2.7V to +5.5V, TA= -40°C to +85°C, unless otherwise noted. Typical values are at VCC= +3.0V, TA= +25°C, unless otherwise noted.) (Note 2)
PARAMETER
SYMBOL
CONDITIONS
MIN
TYP
MAX
UNITS
Supply Voltage V
CC
2.0 5.5 V
Supply Current I
CC
VCC = 5.5V, V
IN_
= 0V or V
CC
10 20 µA
ANALOG SWITCH
Analog Signal Range
V
NO_
,
0
V
TA = +25°C79
On-Resistance R
ON
VCC = 3V, I
COM_
= 10mA,
V
NO_
or V
NC_
= 0 to V
CC
10
Ω
TA = +25°C 0.2 0.4
On-Resistance Match
Between Channels
(Notes 3, 4)
VCC = 3V, I
COM
= 10mA, or
V
NO_
or V
NC_
= 1.5V
0.5
Ω
TA = +25°C 2.5
On-Resistance Flatness
(Note 5)
VCC = 3V, I
COM_
= 10mA,
V
NO_
or V
NC_
= 1V, 2V, 3V
4
Ω
TA = +25°C-2 +2
NO_ or NC_ Off-Leakage
Current
I
OFF
V
C C
= 5.5V , V
N O_
or V
N C _
= 1V
or 4.5V , V
C OM _
= 4.5V or 1V
-10
nA
TA = +25°C-2 +2
COM_ On-Leakage Current
I
ON
VCC = 5.5V; V
NO_
or V
NC_
=
1V, 4.5V, or floating; V
COM_
=
1V, 4.5V, or floating
nA
DYNAMIC CHARACTERISTICS
Signal Over Rail to High-Z
Switching Time
V
NO_
or V
NC_
= VCC to (VCC + 0.5V), VCC < 5V
(Figure 1)
0.5 1 µs
High-Z to Low-Z Switching
Time
V
NO_
or V
NC_
= (VCC + 0.5V) to VCC, VCC < 5V
(Figure 1)
0.5 1 µs
Skew (Note 3)
RS = 39Ω, CL = 50pF (Figure 2)
1ns
Propagation Delay (Note 3)
t
PD
RS = 39Ω, CL = 50pF (Figure 2) 0.9 2 ns
TA = +25°C4060
Turn-On Time t
ON
VCC = 3V, V
NO_
or V
NC_
=
1.5V, R
L
= 300Ω, CL = 50pF
(Figure 1)
100
ns
TA = +25°C3040
Turn-Off Time t
OFF
VCC = 3V, V
NO_
or V
NC_
=
1.5V, R
L
= 300Ω, CL = 50pF
(Figure 1)
60
ns
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.
V
COM_
∆R
ON
R
FLAT
t
SKEW
V
TA = -40°C to +85°C
TA = -40°C to +85°C
TA = -40°C to +85°C
TA = -40°C to +85°C
3.75
+10
TA = -40°C to +85°C -12.5 +12.5
0.15
TA = -40°C to +85°C
TA = -40°C to +85°C
CC
MAX4854H/MAX4854HL
Quad SPST, High-Bandwidth, Signal Line
Protection Switch
_______________________________________________________________________________________ 3
ELECTRICAL CHARACTERISTICS (continued)
(VCC= +2.7V to +5.5V, TA= -40°C to +85°C, unless otherwise noted. Typical values are at VCC= +3.0V, TA= +25°C, unless otherwise noted.) (Note 2)
PARAMETER
CONDITIONS
UNITS
Charge Injection Q V
COM_
= 1.5V, RS = 0Ω, CL = 1nF (Figure 3) 8 pC
Off-Isolation (Note 6) V
ISO
f = 100kHz, V
COM_
= 1V
RMS
, RL = 50Ω, CL = 5pF
(Figure 4)
-80 dB
Crosstalk V
CT
f = 1MHz, V
COM_
= 1V
RMS
, RL = 50Ω, CL = 5pF
(Figure 4)
-95 dB
-3dB Bandwidth BW Signal = 0dBm, RL = 50Ω, CL = 5pF (Figure 4)
MHz
Total Harmonic Distortion THD
%
NO_ Off-Capacitance
f = 1MHz (Figure 5) 12 pF
COM On-Capacitance C
ON
f = 1MHz (Figure 5)
pF
DIGITAL I/O (IN_)
VCC = 2V to 3.6V 1.4
Input-Logic High Voltage V
IH
VCC = 3.6V to 5.5V 1.8
V
VCC = 2V to 3.6V 0.5
Input-Logic Low Voltage V
IL
VCC = 3.6V to 5.5V 0.8
V
Input Leakage Current I
IN
V
IN_
= 0 or 5.5V
µA
Typical Operating Characteristics
(VCC= 3.0V, TA = +25°C, unless otherwise noted.)
ON-RESISTANCE vs. COM VOLTAGE
MAX4854H toc01
COM VOLTAGE (V)
ON-RESISTANCE (Ω)
42
5
10
15
20
25
30
35
40
45
0
06
VCC = 1.8V
VCC = 2.0V
VCC = 2.3V
VCC = 2.5V
VCC = 3.0V
VCC = 5.0V
ON-RESISTANCE vs. COM VOLTAGE
MAX4854H toc02
COM VOLTAGE (V)
ON-RESISTANCE (Ω)
2.52.01.51.00.5
3
4
5
6
7
8
2
03.0
VCC = 3.0V
TA = +85°C
TA = +25°C
TA = -40°C
ON-RESISTANCE vs. COM VOLTAGE
MAX4854H toc03
COM VOLTAGE (V)
ON-RESISTANCE (Ω)
431 2
2.0
2.5
3.0
3.5
4.0
4.5
5.0
5.5
1.5
05
VCC = 5.0V
TA = +85°C
TA = +25°C
TA = -40°C
Note 2: Specifications are 100% tested at TA= +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(VCOM_
/ V
NO_
), V
COM_
= output, V
NO_
= input to off switch.
SYMBOL
MIN TYP MAX
150
f = 20Hz to 20kHz, V
C
OFF
COM_
= 1V + 2V
, RL = 600Ω 0.04
P-P
27.5
-0.5 +0.5
Typical Operating Characteristics (continued)
(VCC= 3.0V, TA = +25°C, unless otherwise noted.)
MAX4854H/MAX4854HL
Quad SPST, High-Bandwidth, Signal Line
Protection Switch
4 _______________________________________________________________________________________
SUPPLY CURRENT vs. SUPPLY VOLTAGE
MAX4854H toc04
SUPPLY VOLTAGE (V)
SUPPLY CURRENT (µA)
4.53.52.5
3
4
5
6
7
2
1.5 5.5
TA = -40°C
TA = +25°C
TA = +85°C
TURN-ON/TURN-OFF TIME
vs. SUPPLY VOLTAGE
MAX4854H toc05
SUPPLY VOLTAGE (V)
TURN-ON/TURN-OFF TIME (ns)
4.53.52.5
10
20
30
40
50
60
0
1.5 5.5
t
ON
t
OFF
TURN-ON/TURN-OFF TIME
vs. TEMPERATURE
MAX4854H toc06
TEMPERATURE (°C)
TURN-ON/TURN-OFF TIME (ns)
603510-15
22
24
26
28
30
32
34
20
-40 85
t
OFF
t
ON
LOGIC THRESHOLD vs. SUPPLY VOLTAGE
MAX4854H toc07
SUPPLY VOLTAGE (V)
LOGIC THRESHOLD (V)
4.53.52.5
0.8
1.0
1.2
1.4
1.6
0.6
1.5 5.5
VIN RISING
VIN FALLING
CHARGE INJECTION vs. COM VOLTAGE
MAX4854H toc08
COM VOLTAGE (V)
CHARGE INJECTION (pC)
4321
10
20
30
40
0
05
VCC = 3V
VCC = 5V
LEAKAGE CURRENT vs. TEMPERATURE
MAX4854H toc09
TEMPERATURE (°C)
LEAKAGE CURRENT (nA)
6035-15 10
0.2
0.4
0.6
0.8
1.0
1.2
1.4
1.6
0
-40 85
COM ON-LEAKAGE
COM OFF-LEAKAGE
FREQUENCY RESPONSE
MAX4854H toc10
FREQUENCY (MHz)
FREQUENCY RESPONSE (dB)
100101
-80
-60
-40
-20
0
20
-100
0.1 1000
OFF-RESPONSE
ON-RESPONSE
CROSSTALK
TOTAL HARMONIC DISTORTION
vs. FREQUENCY
MAX4854H toc11
FREQUENCY (Hz)
THD (%)
10k1k100
0.1
10 100k
1
0.01
RL = 600
Ω
SWITCH ENTERING
HIGH-IMPEDANCE STATE
MAX4854H toc12
200µs/div
V
NC
2V/div
0V
V
COM
0V
VCC = 3.0V
HI-Z
STATE
HI-Z
STATE
MAX4854H/MAX4854HL
Quad SPST, High-Bandwidth, Signal Line
Protection Switch
_______________________________________________________________________________________ 5
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 VCC.
These switches have low 27.5pF on-channel capacitance, which allows for 12Mbps switching of the data signals 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.
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 VCCsupply, IN_ can be driven low to GND and
high to +5.5V, allowing for mixing of logic levels in a
system. Driving IN_ rail-to-rail minimizes power consumption. 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 voltage 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.
Pin Description
PIN NAME FUNCTION
1, 5, 7, 10
NO1, NO2,
Normally Open Terminals for Analog Switch (MAX4854H)
1, 5, 7, 10
NC1, NC2,
Normally Closed Terminals for Analog Switch (MAX4854HL)
2, 11 N.C. No Connection. Internally not connected.
3 IN2
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.
4 COM2 Common Terminal for Analog Switch 2
6 GND Ground
8 COM3 Common Terminal for Analog Switch 3
9 IN3
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.
12 COM4 Common Terminal for Analog Switch 4
13 IN4
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.
14 V
CC
Supply Voltage. Bypass VCC to GND with a 0.01µF capacitor as close to the pin as possible.
15 IN1
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.
16 COM1 Common Terminal for Analog Switch 1
— EP Exposed Paddle. Connect to PC board ground plane.
NO3, NO4
NC3, NC4
MAX4854H/MAX4854HL
Quad SPST, High-Bandwidth, Signal Line
Protection Switch
6 _______________________________________________________________________________________
Test Circuits/Timing Diagrams
tR < 20ns
tF < 20ns
50%
LOGIC
INPUT
R
L
COM_
GND
IN_
C
L
INCLUDES FIXTURE AND STRAY CAPACITANCE.
V
OUT
= V
NO (
R
L
)
RL + R
ON
V
NO
t
OFF
0V
NO_
0.9 x V
0UT
0.9 x V
OUT
t
ON
V
OUT
SWITCH
OUTPUT
LOGIC
INPUT
IN DEPENDS ON SWITCH CONFIGURATION;
INPUT POLARITY DETERMINED BY SENSE OF SWITCH.
V
CC
C
L
V
CC
V
OUT
MAX4854H
V
CC
0V
SWITCH
INPUT
NORMAL MODE NORMAL MODE
HIGH-Z MODE
V
CC
+ 0.5V
t
HIZ
t
HIZB
Figure 1. Switching Time
t
skew_i
90%
50%
10%
90%
50%
10%
t
fi
INPUT A
INPUT A-
t
ri
t
skew_o
90%
50%
10%
90%
50%
10%
t
fo
OUTPUT B
OUTPUT B-
t
ro
B-
C
L
A-
R
s
A
B
C
L
TxD+
TxD-
R
s
Rs = 39
Ω
C
L
= 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.
|t
skew_i
|
|t
skew_o
|
|t
fo - tfi
|
|t
ro - tri
|
Figure 2. Output Signal Skew
MAX4854H/MAX4854HL
Quad SPST, High-Bandwidth, Signal Line
Protection Switch
_______________________________________________________________________________________ 7
V
GEN
GND
COM_
C
L
V
OUT
V
CC
V
OUT
∆V
OUT
Q = ∆V
OUT
x C
L
NO_
OFF
OFF
ON
ON
OFF
OFF
IN_
MAX4854H
IN_
MAX4854HL
V
IL
TO V
IH
V
CC
R
GEN
IN_
MAX4854H
Figure 3. Charge Injection
MEASUREMENTS ARE STANDARDIZED AGAINST SHORTS AT IC TERMINALS.
OFF-ISOLATION IS MEASURED BETWEEN COM_ AND "OFF" OR NO_ TERMINAL ON EACH SWITCH.
ON-LOSS IS MEASURED BETWEEN COM_ AND "ON" OR NO_ TERMINAL ON EACH SWITCH.
CROSSTALK IS MEASURED FROM ONE CHANNEL TO THE OTHER CHANNEL.
SIGNAL DIRECTION THROUGH SWITCH IS REVERSED; WORST VALUES ARE RECORDED.
+5V
V
OUT
V
CC
IN_
COM1
NO1*/
NC1
V
IN
MAX4854H/
MAX4854HL
OFF-ISOLATION = 20log
V
OUT
V
IN
ON-LOSS = 20log
V
OUT
V
IN
CROSSTALK = 20log
V
OUT
V
IN
NETWORK
ANALYZER
50Ω
50Ω 50Ω
50Ω
MEAS REF
10nF
0V OR V
CC
GND
*FOR CROSSTALK THIS PIN IS NO2.
COM2 IS OPEN.
Figure 4. On-Loss, Off-Isolation, and Crosstalk
CAPACITANCE
METER
NO_
COM_
GND
IN
V
IL
OR V
IH
10nF
V
CC
f = 1MHz
V
CC
MAX4854H/
MAX4854HL
Figure 5. Channel Off-/On-Capacitance
Chip Information
TRANSISTOR COUNT: 735
PROCESS: CMOS
MAX4854H/MAX4854HL
Quad SPST, High-Bandwidth, Signal Line
Protection Switch
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.
8 _____________________Maxim Integrated Products, 120 San Gabriel Drive, Sunnyvale, CA 94086 408-737-7600
© 2005 Maxim Integrated Products Printed USA is a registered trademark of Maxim Integrated Products.
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
.)
12x16L QFN THIN.EPS
0.10 C 0.08 C
0.10 M C A B
D
D/2
E/2
E
A1
A2
A
E2
E2/2
L
k
e
(ND - 1) X e
(NE - 1) X e
D2
D2/2
b
L
e
L
C
L
e
C
L
L
C
L
C
E
1
2
21-0136
PACKAGE OUTLINE
12, 16L, THIN QFN, 3x3x0.8mm
1. DIMENSIONING & TOLERANCING CONFORM TO ASME Y14.5M-1994.
EXPOSED PAD VARIATIONS
2. ALL DIMENSIONS ARE IN MILLIMETERS. ANGLES ARE IN DEGREES.
3. N IS THE TOTAL NUMBER OF TERMINALS.
4. THE TERMINAL #1 IDENTIFIER AND TERMINAL NUMBERING CONVENTION SHALL CONFORM TO
JESD 95-1 SPP-012. DETAILS OF TERMINAL #1 IDENTIFIER ARE OPTIONAL, BUT MUST BE LOCATED
WITHIN THE ZONE INDICATED. THE TERMINAL #1 IDENTIFIER MAY BE EITHER A MOLD OR
MARKED FEATURE.
5. DIMENSION b APPLIES TO METALLIZED TERMINAL AND IS MEASURED BETWEEN 0.20 mm AND 0.25 mm
FROM TERMINAL TIP.
6. ND AND NE REFER TO THE NUMBER OF TERMINALS ON EACH D AND E SIDE RESPECTIVELY.
7. DEPOPULATION IS POSSIBLE IN A SYMMETRICAL FASHION.
8. COPLANARITY APPLIES TO THE EXPOSED HEAT SINK SLUG AS WELL AS THE TERMINALS.
9. DRAWING CONFORMS TO JEDEC MO220 REVISION C.
NOTES:
E
2
2
21-0136
PACKAGE OUTLINE
12, 16L, THIN QFN, 3x3x0.8mm
DOWN
BONDS
ALLOWED
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