MAX4851 Datasheet, PDF (1/14 Pages) Maxim Integrated Products – 3.5 Ω/7 ΩQuad SPST Switches with Over-Rail Signal Handling

19-3471; Rev 0; 10/04
3.5Ω/7Ω Quad SPST Switches with Over-Rail
Signal Handling
General Description
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.
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.
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.
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
Pin Configurations and Typical Operating Circuit appear at
end of data sheet
Features
o USB 2.0 Full Speed (12Mbps) and USB 1.1 Signal
Switching
o Switch Signals Greater than V_CC
o +2V to +5.5V Supply Range
o 3.5Ω/7Ω On-Resistance
o 30pF On-Capacitance (7Ω Switch)
o 150MHz -3dB Bandwidth
o 1.8V Logic Compatibility
o Low Supply Current
0.01µA (MAX4853)
5µA (MAX4851)
10µA (MAX4851H/MAX4853H)
o Low 0.01nA Leakage Current
o Available in a Space-Saving 3mm x 3mm, 16-Pin
TQFN Package
Ordering Information
PART
TEMP RANGE PIN-PACKAGE
MAX4851ETE -40°C to +85°C 16 TQFN-EP*
MAX4851HETE -40°C to +85°C 16 TQFN-EP*
MAX4853ETE -40°C to +85°C 16 TQFN-EP*
MAX4853HETE -40°C to +85°C 16 TQFN-EP*
*EP = Exposed paddle.
TOP
MARK
ABW
ABX
ACB
ACC
Block Diagram/Truth Table
MAX4851
MAX4851H
NO1
COM1
3.5Ω
IN1
NO2
COM2
3.5Ω
IN2
NO3
COM3
3.5Ω
IN3
NO4
COM4
3.5Ω
IN4
VCC
3
MAX4853
MAX4853H
NO1
3.5Ω
TRUTH TABLE
NO2
IN_ NO_
0
OFF
1
ON
NO3
SWITCHES SHOWN
FOR LOGIC "0" INPUT
NO4
7Ω
3.5Ω
7Ω
COM1
IN1
COM2
IN2
COM3
IN3
COM4
IN4
COUT
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.