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MAX4853H
Technical data
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MAXIM MAX4851, MAX4851H, MAX4853, MAX4853H Technical data

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General Description
The MAX4851/MAX4851H/MAX4853/MAX4853H family of quad single-pole/single-throw (SPST) switches oper­ates from a single +2V to +5.5V supply and can handle signals greater than the supply rail. These switches fea­ture low 3.5Ω on-resistance with 40pF on-capacitance or 7Ω on-resistance with 30pF on-capacitance, making them ideal for switching audio and data signals.
The MAX4851/MAX4851H are configured with four SPST switches and feature a comparator for head­phone detection or mute/send key functions. The MAX4853/MAX4853H have four SPST switches but do not include a comparator.
For over-rail applications, these devices offer either the pass-through or high-impedance option. For the MAX4851/ MAX4853, signals greater than the positive supply (up to 5.5V) pass through the switch without dis­tortion. For the MAX4851H/MAX4853H, the switch input becomes high impedance when the input signal exceeds the supply rail.
The MAX4851/MAX4851H/MAX4853/MAX4853H are available in the space-saving, 16-pin, 3mm x 3mm thin QFN package and operate over the -40°C to +85°C extended temperature range.
Applications
USB Switching
Audio Signal Routing
Cellular Phones
Notebook Computers
PDAs and Other Handheld Devices
Features
♦ USB 2.0 Full Speed (12Mbps) and USB 1.1 Signal
Switching
♦ Switch Signals Greater than V
CC
♦ +2V to +5.5V Supply Range
♦ 3.5Ω/7Ω On-Resistance
♦ 30pF On-Capacitance (7Ω Switch)
♦ 150MHz -3dB Bandwidth
♦ 1.8V Logic Compatibility
♦ Low Supply Current
0.01µA (MAX4853) 5µA (MAX4851) 10µA (MAX4851H/MAX4853H)
♦ Low 0.01nA Leakage Current
♦ Available in a Space-Saving 3mm x 3mm, 16-Pin
TQFN Package
MAX4851/MAX4851H/MAX4853/MAX4853H
3.5ΩΩ/7
ΩΩ
Quad SPST Switches with Over-Rail
Signal Handling
________________________________________________________________ Maxim Integrated Products 1
Ordering Information
MAX4851
MAX4851H
NO1
COM1 IN1
3.5Ω
NO2
COM2 IN2
3.5Ω
NO3
COM3 IN3
3.5Ω
NO4
COUT
COM4 IN4
CIN
3.5Ω
V
CC
3
MAX4853
MAX4853H
NO1
COM1 IN1
3.5Ω
NO2
COM2 IN2
7Ω
NO3
COM3 IN3
3.5Ω
NO4
COM4 IN4
7Ω
TRUTH TABLE
SWITCHES SHOWN FOR LOGIC "0" INPUT
IN_
0 1
NO_ OFF
ON
Block Diagram/Truth Table
19-3471; Rev 0; 10/04
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.
PART
TEMP RANGE
PIN-PACKAGE
TOP
MARK
MAX4851ETE
16 TQFN-EP* ABW
MAX4851HETE
16 TQFN-EP* ABX
MAX4853ETE
16 TQFN-EP* ACB
MAX4853HETE
16 TQFN-EP* ACC
*EP = Exposed paddle.
Pin Configurations and Typical Operating Circuit appear at end of data sheet
-40°C to +85°C
-40°C to +85°C
-40°C to +85°C
-40°C to +85°C
MAX4851/MAX4851H/MAX4853/MAX4853H
3.5ΩΩ/7
ΩΩ
Quad SPST Switches with Over-Rail
Signal Handling
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_, CIN, COM_, NO_ to GND (Note 1)........-0.3V to +6.0V
COUT..........................................................-0.3V to (V
CC
+ 0.3V)
COUT Continuous Current................................................±20mA
Closed-Switch Continuous Current COM_, NO_, NC_
3.5Ω Switch ................................................................±100mA
7Ω Switch .....................................................................±50mA
Peak Current COM_, NO_ (pulsed at 1ms, 50% duty cycle)
3.5Ω Switch ................................................................±200mA
7Ω Switch ...................................................................±100mA
Peak Current COM_, NO_ (pulsed at 1ms, 10% duty cycle)
3.5Ω Switch ................................................................±240mA
7Ω Switch ...................................................................±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
CONDITIONS
UNITS
Supply Voltage V
CC
2.0 5.5 V
MAX4851 5 10
10 20Supply Current I
CC
VCC = 5.5V, V
IN_
= 0 or V
CC
MAX4853
1
µA
ANALOG SWITCH (3.5Ω Switch)
Analog Signal Range
V
NO_
,
V
COM_
0 5.5 V
TA = +25°C 3.5 4.5
On-Resistance R
ON
VCC = 3V, I
COM_
=
10mA, V
NO_
= 0 to
5.5V (MAX485_) or V
CC
(MAX485_H)
T
A
= -40°C to +85°C 5
Ω
TA = +25°C 0.1 0.2
On-Resistance Match Between Channels (Notes 3, 4)
∆R
ON
VCC = 3V; I
COM
=
TA = -40°C to +85°C
Ω
TA = +25°C 1.2 1.8
R
FLAT
VCC = 3V, I
COM_
=
10mA, V
NO_
= 1V,
2V, 3V
T
A
= -40°C to +85°C 2
Ω
TA = +25°C -2 +2
NO_ Off-Leakage Current I
OFF
VCC = 5.5V, V
NO_
= 1V or 4.5V,
TA = -40°C to +85°C -10
nA
TA = +25°C -2 +2
COM_ On-Leakage Current I
ON
VCC = 5.5V; V
NO_
= 1V, 4.5V, or floating; V
COM_
=
TA = -40°C to +85°C
nA
-3dB Bandwidth BW S i g nal = 0d Bm , RL = 50Ω, C L = 5p F, Fi g ur e 4
MHz
Note 1: Signals on IN_, NO_, or COM_ below GND are clamped by internal diodes. Limit forward-diode current to maximum current
rating.
SYMBOL
MIN TYP MAX
MAX4851H/MAX4853H
On-Resistance Flatness (Note 5)
10mA; V
V
COM_
1V, 4.5V, or floating
= 1.5V
NO_
= 4.5V or 1V
-12.5 +12.5
0.01
0.25
+10
135
MAX4851/MAX4851H/MAX4853/MAX4853H
3.5ΩΩ/7
ΩΩ
Quad SPST Switches with Over-Rail
Signal Handling
_______________________________________________________________________________________ 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
NO_ Off-Capacitance C
OFF
f = 1MHz, Figure 5 20 pF
COM On-Capacitance C
ON
f = 1MHz, Figure 5 40 pF
ANALOG SWITCH (7Ω Switch)
Analog Signal Range
V
NO_
,
V
COM_
0 5.5 V
TA = +25°C 7 9
On-Resistance R
ON
VCC = 3V, I
COM_
=
10mA, V
NO_
= 0 to
5.5V (MAX485_), or V
CC
(MAX485_H)
T
A
= -40°C to +85°C 10
Ω
TA = +25°C 0.2 0.4
On-Resistance Match Between Channels (Notes 3, 4)
∆R
ON
VCC = 3V, I
COM
=
TA = -40°C to +85°C 0.5
Ω
TA = +25°C 2.5
R
FLAT
VCC = 3V; I
COM_
=
10mA; V
NO_
= 1V,
2V, 3V
T
A
= -40°C to +85°C 4.0
Ω
TA = +25°C - 2 +2
NO_ Off-Leakage Current I
OFF
VCC = 5.5V, V
NO_
= 1V or 4.5V,
TA = -40°C to +85°C -10
nA
TA = +25°C - 2 +2
COM_ On-Leakage Current I
ON
VCC = 5.5V; V
NO_
= 1V, 4.5V, or floating; V
COM_
=
TA = -40°C to +85°C
nA
-3dB Bandwidth BW
MHz
NO_ Off-Capacitance C
OFF
f = 1MHz, Figure 5 13 pF
COM On-Capacitance C
ON
f = 1MHz, Figure 5 30 pF
DYNAMIC CHARACTERISTICS
Signal Over-Rail to High­Impedance Switching Time
t
HIZ
MAX4851H/MAX4853H, VNO_ = VCC to (V
CC
+ 0.5V), VCC < 5V, Figure 1
0.5 1 µs
High-Impedance to Low-Impedance Switching Time
t
HIZB
MAX4851H/MAX4853H, VNO_ = (VCC +
0.5V) to V
CC
, VCC < 5V, Figure 1
0.5 1 µs
Skew (Note 3) t
SKEW
RS = 39Ω, CL = 50pF, Figure 2 0.1 1 ns
Propagation Delay (Note 3) t
PD
RS = 39Ω, CL = 50pF, Figure 2 0.9 2 ns
TA = +25°C 40 60
Turn-On Time t
ON
V
C C
= 3V , V
N O_
=
1.5V , R
L
= 300Ω, C
L
= 50p F, Fi g ur e 1
T
A
= -40°C to +85°C 100
ns
TA = +25°C 30 40
Turn-Off Time t
OFF
V
C C
= 3V , V
N O_
=
1.5V , R
L
= 300Ω, C
L
= 50p F, Fi g ur e 1
T
A
= -40°C to +85°C 60
ns
Charge Injection Q
8pC
On-Resistance Flatness (Note 5)
SYMBOL
10mA, V
V
COM_
1V, 4.5V, or floating
S i g nal = 0d Bm , RL = 50Ω, C L = 5p F, Fi g ur e 4 150
= 1.5V
NO_
= 4.5V or 1V
MIN TYP MAX
- 12.5 +12.5
3.75
+10
V
COM_
= 1.5V, RS = 0Ω, CL = 1nF, Figure 3
MAX4851/MAX4851H/MAX4853/MAX4853H
3.5ΩΩ/7
ΩΩ
Quad SPST Switches with Over-Rail
Signal Handling
4 _______________________________________________________________________________________
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
Off-Isolation (Note 6)
f = 100kHz, V
COM_
= 1V
RMS
, RL = 50Ω,
C
L
= 5pF, Figure 4
-80 dB
Crosstalk
f = 1MHz, V
COM_
= 1V
RMS
, RL = 50Ω,
C
L
= 5pF, Figure 4
-95 dB
Total Harmonic Distortion THD
f = 20Hz to 20kHz, V
COM_
= 1V + 2V
P-P
,
R
L
= 600Ω
%
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
COMPARATOR
Comparator Range 0 5.5 V
Comparator Threshold V
TH
VCC = 2V to 5.5V, falling input
0.3 x
0.33 x
0.36 x V
Comparator Hysteresis VCC = 2V to 5.5V 50 mV
I
SOURCE
= 1mA
V
CC
­V
I
SINK
= 1mA 0.4 V
Rising input, Figure 6 2.5
Comparator Switching Time
Falling input, Figure 6 0.5
µs
Note 2: Specifications are 100% tested at TA= +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(VCOM_
/ V
NO_
), V
COM_
= output, V
NO_
= input to off switch.
SYMBOL
MIN TYP MAX
0.04
-0.5 +0.5
V
Comparator Output High Voltage
Comparator Output Low Voltage
0.4V
CC
V
CC
V
CC
MAX4851/MAX4851H/MAX4853/MAX4853H
3.5ΩΩ/7
ΩΩ
Quad SPST Switches with Over-Rail
Signal Handling
_______________________________________________________________________________________ 5
MAX4851/MAX4853
ON-RESISTANCE vs. COM VOLTAGE
MAX4851/3 toc01
COM VOLTAGE (V)
ON-RESISTANCE (Ω)
42
1
2
3
4
5
6
7
8
9
10
0
06
3.5Ω SWITCH
VCC = 1.8V
VCC = 2.0V
VCC = 2.3V
VCC = 2.5V
VCC = 3.0V
VCC = 5.0V
MAX4851/MAX4853
ON-RESISTANCE vs. COM VOLTAGE
MAX4851/3 toc02
COM VOLTAGE (V)
ON-RESISTANCE (Ω)
42
1.0
1.5
2.0
2.5
3.0
3.5
4.0
4.5
0.5 06
VCC = 3.0V
3.5Ω SWITCH
TA = +85°C
TA = +25°C
TA = -40°C
MAX4851/MAX4853
ON-RESISTANCE vs. COM VOLTAGE
MAX4851/3 toc03
COM VOLTAGE (V)
ON-RESISTANCE (Ω)
42
1.0
1.5
2.0
2.5
3.0
3.5
0.5 06
VCC = 5.0V
3.5Ω SWITCH
TA = +85°C
TA = +25°C
TA = -40°C
MAX4851H/MAX4853H
ON-RESISTANCE vs. COM VOLTAGE
MAX4851/3 toc04
COM VOLTAGE (V)
ON-RESISTANCE (Ω)
42
1
2
3
4
5
6
7
8
9
10
0
06
VCC = 1.8V
3.5Ω SWITCH
VCC = 2.0V
VCC = 2.3V
VCC = 2.5V
VCC = 3.0V
VCC = 5.0V
MAX4851H/MAX4853H
ON-RESISTANCE vs. COM VOLTAGE
MAX4851/3 toc05
COM VOLTAGE (V)
ON-RESISTANCE (Ω)
2.52.00.5 1.0 1.5
1.5
2.0
2.5
3.0
3.5
4.0
4.5
5.0
1.0 0 3.0
VCC = 3.0V
3.5Ω SWITCH
TA = +85°C
TA = +25°C
TA = -40°C
MAX4851H/MAX4853H
ON-RESISTANCE vs. COM VOLTAGE
MAX4850 toc06
COM VOLTAGE (V)
ON-RESISTANCE (Ω)
4321
1.0
1.5
2.0
2.5
3.0
3.5
0.5 05
VCC = 5.0V
3.5Ω SWITCH
TA = +85°C
TA = +25°C
TA = -40°C
MAX4853
ON-RESISTANCE vs. COM VOLTAGE
MAX4851/3 toc07
COM VOLTAGE (V)
ON-RESISTANCE (Ω)
42
5
10
15
20
25
30
35
40
45
0
06
VCC = 1.8V
7Ω SWITCH
VCC = 2.0V
VCC = 2.3V
VCC = 2.5V
VCC = 3.0V
VCC = 5.0V
MAX4853
ON-RESISTANCE vs. COM VOLTAGE
MAX4851/3 toc08
COM VOLTAGE (V)
ON-RESISTANCE (Ω)
42
3
4
5
6
7
8
2
06
VCC = 3.0V 7Ω SWITCH
TA = +85°C
TA = +25°C
TA = -40°C
MAX4853
ON-RESISTANCE vs. COM VOLTAGE
MAX4851/3 toc09
COM VOLTAGE (V)
ON-RESISTANCE (Ω)
541 2 3
2.0
2.5
3.0
3.5
4.0
4.5
5.0
5.5
1.5 06
VCC = 5.0V 7Ω SWITCH
TA = +85°C
TA = +25°C
TA = -40°C
Typical Operating Characteristics
(VCC= 3.0V, TA= +25°C, unless otherwise noted.)
MAX4851/MAX4851H/MAX4853/MAX4853H
3.5ΩΩ/7
ΩΩ
Quad SPST Switches with Over-Rail
Signal Handling
6 _______________________________________________________________________________________
MAX4853H
ON-RESISTANCE vs. COM VOLTAGE
MAX4851/3 toc10
COM VOLTAGE (V)
ON-RESISTANCE (Ω)
42
5
10
15
20
25
30
35
40
45
0
06
VCC = 1.8V
7Ω SWITCH
VCC = 2.0V
VCC = 2.3V
VCC = 2.5V
VCC = 3.0V
VCC = 5.0V
MAX4853H
ON-RESISTANCE vs. COM VOLTAGE
MAX4851/3 toc11
COM VOLTAGE (V)
ON-RESISTANCE (Ω)
2.52.01.51.00.5
3
4
5
6
7
8
2
0 3.0
VCC = 3.0V 7Ω SWITCH
TA = +85°C
TA = +25°C
TA = -40°C
MAX4853H
ON-RESISTANCE vs. COM VOLTAGE
MAX4851/3 toc12
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 7Ω SWITCH
TA = +85°C
TA = +25°C
TA = -40°C
MAX4851
SUPPLY CURRENT vs. SUPPLY VOLTAGE
MAX4851/3 toc13
SUPPLY VOLTAGE (V)
SUPPLY CURRENT (µA)
5.04.54.03.53.02.52.0
2.5
3.0
3.5
4.0
4.5
5.0
5.5
2.0
1.5 5.5
TA = +85°C
TA = +25°C
TA = -40°C
MAX4851H
SUPPLY CURRENT vs. SUPPLY VOLTAGE
3
4
5
6
7
8
2
MAX4851/3 toc14
SUPPLY VOLTAGE (V)
SUPPLY CURRENT (µA)
5.04.54.03.53.02.52.01.5 5.5
TA = +85°C
TA = +25°C
TA = -40°C
0.2
0.4
0.6
0.8
1.0
0
MAX4853
SUPPLY CURRENT vs. SUPPLY VOLTAGE
MAX4851/3 toc15
SUPPLY VOLTAGE (V)
SUPPLY CURRENT (nA)
5.04.54.03.53.02.52.01.5 5.5
TA = -40°C
TA = +25°C
TA = +85°C
5.0
5.5
6.0
6.5
7.0
7.5
8.0
4.5
MAX4853H
SUPPLY CURRENT vs. SUPPLY VOLTAGE
MAX4851/3 toc16
SUPPLY VOLTAGE (V)
SUPPLY CURRENT (µA)
5.04.54.03.53.02.52.01.5 5.5
TA = +85°C
TA = +25°C
TA = -40°C
TURN-ON/TURN-OFF TIME
vs. SUPPLY VOLTAGE
MAX4851/3 toc17
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
3.5Ω SWITCH
TURN-ON/TURN-OFF TIME
vs. TEMPERATURE
MAX4851/3 toc18
TEMPERATURE (°C)
TURN-ON/TURN-OFF TIME (ns)
603510-15
22
24
26
28
30
32
34
20
-40 85
t
ON
3.5Ω SWITCH
t
OFF
Typical Operating Characteristics (continued)
(VCC= 3.0V, TA= +25°C, unless otherwise noted.)
MAX4851/MAX4851H/MAX4853/MAX4853H
3.5ΩΩ/7
ΩΩ
Quad SPST Switches with Over-Rail
Signal Handling
_______________________________________________________________________________________ 7
TURN-ON/TURN-OFF TIME
vs. SUPPLY VOLTAGE
MAX4851/3 toc19
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
7Ω SWITCH
TURN-ON/TURN-OFF TIME
vs. TEMPERATURE
MAX4851/3 toc20
TEMPERATURE (°C)
TURN-ON/TURN-OFF TIME (ns)
603510-15
22
24
26
28
30
32
34
20
-40 85
7Ω SWITCH
t
OFF
t
ON
LOGIC THRESHOLD vs. SUPPLY VOLTAGE
MAX4851/3 toc21
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
MAX4851/3 toc22
COM VOLTAGE (V)
CHARGE INJECTION (pC)
4321
10
20
30
0
05
3.5Ω SWITCH
VCC = 3V
VCC = 5V
CHARGE INJECTION vs. COM VOLTAGE
MAX4851/3 toc23
COM VOLTAGE (V)
CHARGE INJECTION (pC)
4321
10
20
30
0
05
7Ω SWITCH
VCC = 3V
VCC = 5V
LEAKAGE CURRENT vs. TEMPERATURE
MAX4851/3 toc24
TEMPERATURE (°C)
LEAKAGE CURRENT (nA)
603510-15
0.2
0.4
0.6
0.8
1.0
1.2
1.4
0
-40 85
3.5Ω SWITCH
COM ON-LEAKAGE
COM OFF-LEAKAGE
LEAKAGE CURRENT vs. TEMPERATURE
MAX4851/3 toc25
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
7Ω SWITCH
COM ON-LEAKAGE
COM OFF-LEAKAGE
FREQUENCY RESPONSE
MAX4851/3 toc26
FREQUENCY (MHz)
FREQUENCY RESPONSE (dB)
100101
-80
-60
-40
-20
0
20
-100
0.1 1000
3.5Ω SWITCH
ON-RESPONSE
OFF-RESPONSE
CROSSTALK
FREQUENCY RESPONSE
MAX4851/3 toc27
FREQUENCY (MHz)
FREQUENCY RESPONSE (dB)
100101
-80
-60
-40
-20
0
20
-100
0.1 1000
7Ω SWITCH
ON-RESPONSE
OFF-RESPONSE
CROSSTALK
Typical Operating Characteristics (continued)
(VCC= 3.0V, TA= +25°C, unless otherwise noted.)
MAX4851/MAX4851H/MAX4853/MAX4853H
3.5ΩΩ/7
ΩΩ
Quad SPST Switches with Over-Rail
Signal Handling
8 _______________________________________________________________________________________
TOTAL HARMONIC DISTORTION
vs. FREQUENCY
MAX4851/3 toc28
FREQUENCY (Hz)
THD (%)
10k1k100
0.1
10 100k
1
0.01
3.5Ω SWITCH R
L
= 600Ω
TOTAL HARMONIC DISTORTION
vs. FREQUENCY
MAX4851/3 toc29
FREQUENCY (Hz)
THD (%)
10k1k100
0.1
10 100k
1
0.01
7Ω SWITCH R
L
= 600Ω
(MAX4851/MAX4851H) COMPARATOR
THRESHOLD vs. TEMPERATURE
MAX4851/3 toc30
TEMPERATURE (°C)
COMPARATOR THRESHOLD (V)
603510-15
1.02
1.04
1.06
1.08
1.10
1.00
-40 85
V
CMPI_
RISING
V
CMPI_
FALLING
VCC = 3.0V
COMPARATOR THRESHOLD
vs. TEMPERATURE
MAX4851/3 toc31
TEMPERATURE (°C)
COMPARATOR THRESHOLD (V)
603510-15
1.625
1.650
1.675
1.700
1.725
1.750
1.600
-40 85
V
CMPI_
RISING
V
CMPI_
FALLING
VCC = 5.0V
MAX4851/MAX4853
SWITCH PASSING SIGNALS
ABOVE SUPPLY VOLTAGE
MAX4851/3 toc32
V
NC
2V/div
0V
V
COM
0V
200µs/div
VCC = 3.0V
MAX4851H/MAX4853H
SWITCH ENTERING
HIGH-IMPEDANCE STATE
MAX4851/3 toc33
200µs/div
V
NC
2V/div
0V
V
COM
0V
VCC = 3.0V
HI-Z
STATE
HI-Z
STATE
Typical Operating Characteristics (continued)
(VCC= 3.0V, TA= +25°C, unless otherwise noted.)
Detailed Description
The MAX4851/MAX4851H/MAX4853/MAX4853H are low on-resistance, low-voltage, analog switches that operate from a +2V to +5.5V single supply and are fully specified for nominal 3.0V applications. The MAX4851/MAX4853 devices feature over-rail signal capability that allows sig­nals up to 5.5V with supply voltages down to 2.0V to pass through without distortion. The MAX4851H/ MAX4853H enter high-impedance mode when the signal voltage exceeds V
CC
and return to normal operation
when the signal voltage drops below V
CC
.
These quad SPST switches have low on-channel capaci­tance, which allows switching of the data signals for USB
2.0/1.1 applications (12Mbps). They 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.
The MAX4851_ features a comparator that can be used for headphone or mute detection. The comparator threshold is internally generated to be approximately 1/3 of VCC.
MAX4851/MAX4851H/MAX4853/MAX4853H
3.5ΩΩ/7
ΩΩ
Quad SPST Switches with Over-Rail
Signal Handling
_______________________________________________________________________________________ 9
MAX4851/MAX4851H/MAX4853/MAX4853H
Pin Description
PIN
MAX4851
MAX4851H
NAME FUNCTION
11NO1 Normally Open Terminal for Analog Switch 1
2—CIN Inverting Input for Comparator
33IN2
Digital Control Input for Analog Switch 2. A logic-low on IN2 disconnects COM2 from NO2 and a logic-high connects COM2 to NO2.
44COM2 Common Terminal for Analog Switch 2
55NO2 Normally Open Terminal for Analog Switch 2
66GND Ground
77NO3 Normally Open Terminal for Analog Switch 3
88COM3 Common Terminal for Analog Switch 3
99IN3
Digital Control Input for Analog Switch 3. A logic-low on IN3 disconnects COM3 from NO3 and a logic-high connects COM3 to NO3.
10 10 NO4 Normally Open Terminal for Analog Switch 4
11 — COUT Output for Comparator
12 12 COM4 Common Terminal for Analog Switch 4
13 13 IN4
Digital Control Input for Analog Switch 4. A logic-low on IN4 disconnects COM4 from NO4 and a logic-high connects COM4 to NO4.
14 14 V
CC
Supply Voltage. Bypass to GND with a 0.01µF capacitor as close to the pin as possible.
15 15 IN1
Digital Control Input for Analog Switch 1. A logic-low on IN1 disconnects COM1 from NO1 and a logic-high connects COM1 to NO1.
16 16 COM1 Common Terminal for Analog Switch 1
— 2, 11 N.C. No Connection. Not internally connected.
EP EP GND Exposed Pad. Connect to ground.
MAX4853
MAX4853H
MAX4851/MAX4851H/MAX4853/MAX4853H
3.5ΩΩ/7
ΩΩ
Quad SPST Switches with Over-Rail
Signal Handling
10 ______________________________________________________________________________________
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
MAX4851_ MAX4853_
V
CC
0V
SWITCH
INPUT
NORMAL MODE NORMAL MODE
HIGH-Z MODE
V
CC
+ 0.5V
t
HIZ
t
HIZB
V
CC
Test Circuits/Timing Diagrams
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 = 39Ω C
L
= 50pF
Figure 2. Input/Output Skew Timing Diagram
MAX4851/MAX4851H/MAX4853/MAX4853H
3.5ΩΩ/7
ΩΩ
Quad SPST Switches with Over-Rail
Signal Handling
______________________________________________________________________________________ 11
V
GEN
GND
COM_
C
L
V
OUT
V
CC
V
OUT
∆V
OUT
Q = (∆V
OUT
)(CL)
OFF
ON
OFF
IN
V
IL
TO V
IH
V
CC
R
GEN
IN_
MAX4851_ MAX4853_
NO_
Figure 3. Charge Injection
MEASUREMENTS ARE STANDARDIZED AGAINST SHORTS AT IC TERMINALS. OFF-ISOLATION IS MEASURED BETWEEN COM_ AND OFF NO_ TERMINAL ON EACH SWITCH. ON-LOSS IS MEASURED BETWEEN COM_ AND ON 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*
V
IN
MAX4851_ MAX4853_
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
Test Circuits/Timing Diagrams (continued)
MAX4851/MAX4851H/MAX4853/MAX4853H
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 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 Typical Operating Characteristics). The switches are bidirectional; therefore, NO_ and COM_ can be either inputs or outputs.
Comparator
The positive terminal of the comparator is internally set to V
CC
/ 3. When the negative comparator terminal
(CIN) is below the threshold (V
CC
/ 3), the comparator output (COUT) goes high. When CIN rises above V
CC
/ 3, COUT goes low.
The comparator threshold allows for detection of head­phones since headphone audio signals are typically biased to V
CC
/ 2.
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 VCCbefore applying analog signals, especially if the analog signal is not current limited.
3.5ΩΩ/7
ΩΩ
Quad SPST Switches with Over-Rail
Signal Handling
12 ______________________________________________________________________________________
CAPACITANCE
METER
NO_
COM_
GND
IN
V
IL
OR V
IH
10nF
V
CC
f = 1MHz
V
CC
MAX4851_ MAX4853_
Figure 5. Channel Off-/On-Capacitance
MAX4851_
V
CC
3
VTH + 100mV
V
TH
- 100mV
V
OUT
0V
t
COMP
t
COMP
50%
50%
50%
50%
tR < 20ns t
F
< 20ns
V
CC
V
CC
GND
V
COUT_
CIN_
COUT_
V
CIN_
NO_
V
TH
= VCC/3
COMPARATOR
INPUT (V
CIN_
)
COMPARATOR
OUTPUT (V
COUT_
)
Figure 6. Comparator Switching Time
RON (Ω)
PART
NO1/NO3 NO2/NO4
COMPARATORS OVER-RAIL HANDLING
MAX4851 3.5 3.5 1 Input signal passes through the switch.
MAX4851H 3.5 3.5 1 High-impedance switch input.
MAX4853 3.5 7 — Input signal passes through the switch.
MAX4853H 3.5 7 — High-impedance switch input.
Selector Guide
MAX4851/MAX4851H/MAX4853/MAX4853H
3.5ΩΩ/7
ΩΩ
Quad SPST Switches with Over-Rail
Signal Handling
______________________________________________________________________________________ 13
TOP VIEW
16
1
2
3
4
12
11
10
9
15 14 13
5678
COM1
IN1
VCCIN4
COM4
COUT
NO4
IN3
CIN
IN2
COM2
NO2
GND
NO3
COM3
NO1
MAX4851
MAX4851H
16
1
2
3
4
12
11
10
9
15 14 13
5678
COM1
IN1
VCCIN4
COM4
N.C.
NO4
IN3
N.C.
IN2
COM2
NO2
GND
NO3
COM3
NO1
MAX4853
MAX4853H
3mm x 3mm THIN QFN 3mm x 3mm THIN QFN
CONNECT EXPOSED PAD TO PC BOARD GROUND.
Pin Configurations
MAX4851_
NO1
COM1
USB
CONNECTOR
USB DATA ENABLE
SPEAKER ENABLE
MUTE BUTTON
IN1
D+
D+
OUT+
OUT-
MUTE
D-
D-
3.5Ω
NO2
COM2
IN2
3.5Ω
NO3
COM3
IN3
3.5Ω
NO4
COUT
COM4
IN4
CIN
V
CC
3.5Ω
V
CC
3
DATA SOURCE
(USB)
AUDIO
SOURCE
Typical Operating Circuit
Chip Information
TRANSISTOR COUNT: 735
PROCESS: CMOS
MAX4851/MAX4851H/MAX4853/MAX4853H
3.5ΩΩ/7
ΩΩ
Quad SPST Switches with Over-Rail
Signal Handling
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.
14 ____________________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.
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
1.10
T1633-1 0.95
CODES
PKG.
T1233-1
MIN.
0.95
NOM.
1.10
D2
1.25
1.10
0.95
1.25
NOM.
1.10
MAX.
1.25
MIN.
0.95
MAX.
1.25
E2
12
N
k
A2
0.25
NE
A1
ND
0
0.20 REF
-
-
3
0.0230.05
L
e
E
0.45
2.90
b
D
A
0.20
2.90
0.70
0.50 BSC.
0.55
3.00
0.65
3.10
0.25
3.00
0.75
0.30
3.10
0.80
16
0.20 REF
0.25
-
0
4
0.02
4
-
0.05
0.50 BSC.
0.30
2.90
0.40
3.00
0.20
2.90
0.70
0.25
3.00
0.75
3.10
0.50
0.80
3.10
0.30
PKG
REF. MIN.
12L 3x3
NOM. MAX. NOM.
16L 3x3
MIN. MAX.
0.35 x 45∞
PIN ID
JEDEC
WEED-1
0.35 x 45∞ WEED-2
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
T1233-3
1.10
1.25
0.95 1.10
0.35 x 45∞1.25 WEED-1
0.95
T1633F-3 0.65
T1633-4
0.95
0.80
0.95
0.65
0.80
1.10
1.25
0.95
1.10
0.225 x 45∞
0.95
WEED-2
0.35 x 45∞
1.25
WEED-2
T1633-2
0.95
1.10
1.25
0.95
1.10
0.35 x 45∞
1.25
WEED-2
NO
DOWN BONDS ALLOWED
YES
NO
YES
N/A
NO
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