3.5Ω/7Ω Quad SPST Switches with Over-Rail Signal Handling

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

* Audio Signal Routing * Cell Phones * Notebook Computers * PDAs and Other Handheld Devices * USB Switching

* USB 2.0 Full Speed (12Mbps) and USB 1.1 Signal Switching

* Switch Signals Greater than VCC

* +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