MAXIM MAX4851 MAX4851H MAX4853 MAX4853H 3.5 7 Quad SPST Switches with Over-Rail Signal Handling
Summary
These robust quad SPST switches provide reliable signal handling for sensitive data and audio applications across a wide supply voltage range (+2V to +5.5V). Featuring ultra-low on-resistance (3.5Ω or 7Ω) and advanced over-rail signal capability, they are ideal for complex connectivity in USB switching and general consumer electronics. This comprehensive manual details all necessary technical specifications, including electrical characteristics, absolute maximum ratings, pin configurations, and application guides for professional hardware designers integrating reliable, stable switching solutions into their products.
Page 1 Text Content
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 USB 2.0 Full Speed (12Mbps) and USB 1.1 Signal of quad single-pole/single-throw (SPST) switches oper-
Switching
ates from a single +2V to +5.5V supply and can handle
signals greater than the supply rail. These switches fea- Switch Signals Greater than VCC
ture low 3.5Ω on-resistance with 40p F on-capacitance
+2V to +5.5V Supply Range
or 7Ω on-resistance with 30p F on-capacitance, making
them ideal for switching audio and data signals. 3.5Ω/7Ω On-Resistance
The MAX4851/MAX4851H are configured with four 30p F On-Capacitance (7Ω Switch) SPST switches and feature a comparator for head-
150MHz -3d B Bandwidth
phone detection or mute/send key functions. The MAX4853/MAX4853H have four SPST switches but do 1.8V Logic Compatibility not include a comparator.
Low Supply Current
For over-rail applications, these devices offer either the
0.01µA (MAX4853)
pass-through or high-impedance option. For the
5µA (MAX4851)
MAX4851/ MAX4853, signals greater than the positive
10µA (MAX4851H/MAX4853H)
supply (up to 5.5V) pass through the switch without dis-
tortion. For the MAX4851H/MAX4853H, the switch input Low 0.01n A Leakage Current
becomes high impedance when the input signal
Available in a Space-Saving 3mm x 3mm, 16-Pin
exceeds the supply rail.
TQFN Package
The MAX4851/MAX4851H/MAX4853/MAX4853H are available in the space-saving, 16-pin, 3mm x 3mm thin
Ordering Information
QFN package and operate over the -40°C to +85°C extended temperature range.
PART TEMP RANGE PIN-PACKAGE
MAX4851ETE -40°C to +85°C 16 TQFN-EP* ABW MAX4851HETE -40°C to +85°C 16 TQFN-EP* ABX MAX4853ETE -40°C to +85°C 16 TQFN-EP* ACB
Applications
MAX4853HETE -40°C to +85°C 16 TQFN-EP* ACC
USB Switching
*EP = Exposed paddle.
Audio Signal Routing Cellular Phones Block Diagram/Truth Table Notebook Computers PDAs and Other Handheld Devices
MAX4851 MAX4853 MAX4851H MAX4853H
NO1 COM1 NO1 COM1 IN13.5Ω IN13.5Ω
NO2 COM2 TRUTH TABLE NO2 COM2
IN23.5Ω IN_ NO_ IN27Ω OFF
NO3 COM3 NO3 COM3
IN33.5Ω SWITCHES SHOWN IN33.5Ω FOR LOGIC "0" INPUT
NO4 COM4 NO4 COM4
3.5Ω IN4 IN47Ω VCC
Pin Configurations and Typical Operating Circuit appear at COUT
end of data sheet
Maxim Integrated Products
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.
Page Summary Contents For MAXIM MAX4851 MAX4851H MAX4853 MAX4853H 3.5 7 Quad SPST Switches with Over-Rail Signal Handling
Manual Details
| Brand | QUAD |
|---|---|
| Pages | 14 |
| File Size | 836.38 KB |
| Published | May 29, 2026 |
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Frequently Asked Questions
What types of signals are these switches designed to handle?
They are ideal for switching both audio and data signals, operating over a +2V to +5.5V supply range.
How do I determine if I need the comparator functionality?
The MAX4851/MAX4851H versions include a comparator useful for phone detection or mute functions; the MAX4853/MAX4853H do not.
What is the operational temperature range and package type?
They operate over an extended temperature range of -40°C to +85°C in a space-saving, 16-pin TQFN package.
Can these switches handle signals higher than the operating voltage (VCC)?
Yes, they are designed for over-rail applications and can pass through control signals greater than the supply rail without distortion.