19-3471; Rev 0; 10/04
3.5Ω/7Ω Quad SPST Switches with Over-Rail
Signal Handling
General Description
Features
The MAX4851/MAX4851H/MAX4853/MAX4853H family
of quad single-pole/single-throw (SPST) switches oper-
ates from a single +2V to +5.5V supply and can handle
signals greater than the supply rail. These switches fea-
ture 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.
ꢀ USB 2.0 Full Speed (12Mbps) and USB 1.1 Signal
Switching
ꢀ Switch Signals Greater than V
ꢀ +2V to +5.5V Supply Range
ꢀ 3.5Ω/7Ω On-Resistance
CC
The MAX4851/MAX4851H are configured with four
SPST switches and feature a comparator for head-
phone detection or mute/send key functions. The
MAX4853/MAX4853H have four SPST switches but do
not include a comparator.
ꢀ 30pF On-Capacitance (7Ω Switch)
ꢀ 150MHz -3dB Bandwidth
ꢀ 1.8V Logic Compatibility
ꢀ Low Supply Current
0.01µA (MAX4853)
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 dis-
tortion. For the MAX4851H/MAX4853H, the switch input
becomes high impedance when the input signal
exceeds the supply rail.
5µA (MAX4851)
10µA (MAX4851H/MAX4853H)
ꢀ Low 0.01nA Leakage Current
ꢀ Available in a Space-Saving 3mm x 3mm, 16-Pin
TQFN Package
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.
Ordering Information
TOP
MARK
PART
TEMP RANGE PIN-PACKAGE
MAX4851ETE
-40°C to +85°C 16 TQFN-EP*
ABW
ABX
ACB
ACC
MAX4851HETE -40°C to +85°C 16 TQFN-EP*
MAX4853ETE -40°C to +85°C 16 TQFN-EP*
Applications
MAX4853HETE -40°C to +85°C 16 TQFN-EP*
*EP = Exposed paddle.
USB Switching
Audio Signal Routing
Cellular Phones
Block Diagram/Truth Table
Notebook Computers
PDAs and Other Handheld Devices
MAX4851
MAX4851H
MAX4853
MAX4853H
COM1
IN1
COM1
IN1
NO1
NO2
NO3
NO4
NO1
NO2
NO3
NO4
3.5Ω
3.5Ω
7Ω
COM2
IN2
COM2
IN2
TRUTH TABLE
3.5Ω
3.5Ω
3.5Ω
IN_
0
1
NO_
OFF
ON
COM3
IN3
COM3
IN3
SWITCHES SHOWN
FOR LOGIC "0" INPUT
3.5Ω
7Ω
COM4
IN4
COM4
IN4
V
CC
3
COUT
Pin Configurations and Typical Operating Circuit appear at
end of data sheet
CIN
________________________________________________________________ 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.