MAX4850 반도체 회로 부품 판매점
(MAX4850 / MAX4852) Dual SPDT Analog Switches
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 Maxim Integrated Products |
www.DataSheet4U.com
19-3375; Rev 0; 7/04
Dual SPDT Analog Switches with
Over-Rail Signal Handling
General Description
The MAX4850/MAX4850H/MAX4852/MAX4852H family
of dual SPDT (single-pole/double-throw) switches oper-
ate from a single +2V to +5.5V supply and can handle
signals greater than the supply rail. These switches fea-
ture low 3.5Ω or 3.5Ω/7Ω on-resistance with low on-
capacitance, making them ideal for switching audio
and data signals.
The MAX4850/MAX4850H are configured with two
SPDT switches and feature two comparators for head-
phone detection or mute/send key functions. The
MAX4852 has two SPDT switches with no comparators
for low 1µA supply current.
For over-rail applications, these devices offer either the
pass-through or high-impedance option. For the
MAX4850/MAX4852, the signal (up to 5.5V) passes
through the switch without distortion even when the posi-
tive supply rail is exceeded. For the MAX4850H/
MAX4852H, the switch input becomes high impedance
when the input signal exceeds the supply rail.
The MAX4850/MAX4850H/MAX4852/MAX4852H are
available in the space-saving (3mm x 3mm), 16-pin
TQFN package and operate over the extended temper-
ature range of -40°C to +85°C.
Applications
USB Switching
Audio-Signal Routing
Cellular Phones
Notebook Computers
PDAs and Other Handheld Devices
Features
o USB 2.0 Full Speed (12MB) and USB 1.1 Signal
Switching Compliant
o Switch Signals Greater than VCC
o 0.1ns Differential Skew
o 3.5Ω/7Ω On-Resistance
o 135MHz -3dB Bandwidth
o +2V to +5.5V Supply Range
o 1.8V Logic Compatible
o Low Supply Current
1µA (MAX4852)
5µA (MAX4850)
10µA (MAX4850H/MAX4852H)
o Available in a Space-Saving (3mm x 3mm),
16-Pin TQFN Package
Ordering Information
PART
TEMP RANGE
MAX4850ETE -40°C to +85°C
MAX4850HETE -40°C to +85°C
MAX4852ETE -40°C to +85°C
MAX4852HETE -40°C to +85°C
*EP = Exposed paddle.
PIN-PACKAGE
16 TQFN-EP*
16 TQFN-EP*
16 TQFN-EP*
16 TQFN-EP*
TOP
MARK
ABU
ABV
ABZ
ACA
Pin Configurations and Selector Guide appear at end of
data sheet.
Block Diagrams/Truth Table
NC1
NO1
NC2
NO2
COUT1
COUT2
MAX4850
MAX4850H
3.5Ω
COM1
IN1
IN2
3.5Ω COM2
VCC
3
CIN1
VCC
3
CIN2
MAX4852
MAX4852H
NC1 3.5Ω
COM1
NO1 7Ω IN1
NC2 3.5Ω IN2
COM2
NO2 7Ω
MAX4850_
MAX4852_
IN_ NO_ NC_
0 OFF ON
1 ON OFF
SWITCHES SHOWN FOR
LOGIC 0 INPUT
________________________________________________________________ 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.
Dual SPDT Analog Switches with
Over-Rail Signal Handling
ABSOLUTE MAXIMUM RATINGS
VCC, IN_, CIN_, COM_, NO_,
NC_ to GND (Note 1).........................................-0.3V to +6.0V
COUT_........................................................-0.3V to (VCC + 0.3V)
COUT_ Continuous Current..............................................±20mA
Closed Switch Continuous Current COM_, NO_, NC_
3.5Ω Switch ................................................................±100mA
7Ω Switch .....................................................................±50mA
Peak Current COM_, NO_, NC_ (pulsed at 1ms, 50% duty cycle)
3.5Ω Switch ................................................................±200mA
7Ω Switch ...................................................................±100mA
Peak Current COM_, NO_, NC_ (pulsed at 1ms, 10% duty cycle)
3.5Ω Switch ................................................................±240mA
7Ω Switch ...................................................................±120mA
Continuous Power Dissipation (TA = +70°C)
16-Pin TQFN (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, NC, 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
(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 other-
wise noted.) (Note 2)
PARAMETER
Supply Voltage
SYMBOL
VCC
CONDITIONS
Supply Current
ICC VCC = 5.5V, VIN_ = 0V or VCC
ANALOG SWITCH (3.5Ω Switch)
Analog Signal Range
VNO_, VNC_,
VCOM_
On-Resistance (Note 3)
RON
VCC = 3V, ICOM_ = 10mA,
VNC_ or VNO_ = 0 to 5.5V
(MAX485_) or VCC (MAX485_H)
On-Resistance Match
Between Channels
(Notes 3, 4)
∆RON
VCC = 3V, ICOM = 10mA,
VNC_ or VNO_ = 1.5V
On-Resistance Flatness
(Note 5)
RFLAT
VCC = 3V, ICOM_ = 10mA,
VNC_ or VNO_ = 1V, 2V, 3V
NO_/NC_ Off-Leakage
Current
COM_ On-Leakage Current
IOFF
ION
VCC = 5.5V, VNC_ or VNO_ = 1V
or 4.5V, VCOM_ = 4.5V or 1V
VCC = 5.5V; VNC_ or VNO_ = 1V,
4.5V, or floating;
VCOM_ = 1V, 4.5V, or floating
MAX4850
MAX4850H/
MAX4852H
MAX4852
TA = +25°C
TA = -40°C
to +85°C
TA = +25°C
TA = -40°C
to +85°C
TA = +25°C
TA = -40°C
to +85°C
TA = +25°C
TA = -40°C
to +85°C
TA = +25°C
TA = -40°C
to +85°C
MIN
2.0
0
-2
-10
-2
-12.5
TYP
5
10
3.5
0.1
1.2
MAX
5.5
10
20
1
UNITS
V
µA
5.5
4.5
5
0.2
0.25
1.8
2
+2
+10
+2
+12.5
V
Ω
Ω
Ω
nA
nA
-3dB Bandwidth
BW Signal = 0dBm, RL = 50Ω, CL = 5pF (Figure 5) 100 MHz
NO_/NC_ Off-Capacitance
COFF f = 1MHz (Figure 6)
20 pF
2 _______________________________________________________________________________________
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