the max4851 is a quad single-pole/single-throw (spsp) switch from maxim that operates from a single +2v to +5.5v supply and can handle signals greater than the supply rail. this switch features low 3.5 ohm on-resistance with 40pf on-capacitance or 7 ohm on-resistance with 30pf on-capacitance, making it ideal for switching audio and data signals. the max4851/max4851h are configured with four spsp switches and feature a comparator for headphone detection or mute/send key functions. the max4853/max4853h have four spsp 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 include usb switching, audio signal routing, cellular phones, notebook computers, pdas, and other handheld devices.
The MAX4851, MAX4851H, MAX4853 and MAX4853H are quad single‑pole/single‑throw (SPST) analog switches that run from a single +2 V to +5.5 V supply. They provide low on‑resistance (3.5 Ω or 7 Ω) and low on‑capacitance (30 pF or 40 pF), making them suitable for switching audio and USB data signals. The MAX4851 and MAX4853 versions pass signals that exceed the supply rail without distortion, while the MAX4851H and MAX4853H versions enter a high‑impedance state when an over‑rail condition occurs.
Typical applications include USB 2.0 full‑speed switching, audio signal routing, and connectivity in cellular phones, notebook computers, PDAs and other handheld devices. The devices are offered in a 16‑pin thin‑QFN package (3 mm × 3 mm) and operate over –40 °C to +85 °C.
| Supply Voltage (VCC) | 2.0 V – 5.5 V |
|---|---|
| Bandwidth (‑3 dB) | 150 MHz (3.5 Ω version) |
| Off‑Leakage Current | Typical –10 nA |
They operate from a single supply voltage of 2.0 V up to 5.5 V.
When the input signal exceeds VCC, the switch input becomes high‑impedance.
Typical off‑leakage current is about –10 nA.