Quad SPDT Audio Switches

The MAX4740/MAX4740H low on-resistance (0.61Ω typ) analog switches operate from a single 1.6V to 5.5V supply. The MAX4740/MAX4740H are quad, single-pole, double-throw (SPDT) switches and are configured to route audio signals. The MAX4740/MAX4740H are pin-to-pin compatible parts with the ST Microelectronics quad SPDT STG3699 analog switch.

The MAX4740 is a quad SPDT switch and the MAX4740H is a quad SPDT switch that can be placed in a high-impedance mode. Switching logic is controlled by 2 control bits (CB1 and CB2). The MAX4740/MAX4740H also feature a low on-resistance match (0.06Ω) and low power-supply current (0.3µA), which increases battery life.

The MAX4740/MAX4740H are available in a tiny 3mm x 3mm, 16-pin TQFN-EP, and 2.5mm x 2.5mm, 16-pin ultra-thin QFN packages.

Applications

* Cellular Phones * Notebook Computers * PDAs and Other Handheld Devices

* Low On-Resistance (0.61Ω typ)

* 0.06Ω (typ) Channel-to-Channel Matching

* 0.32Ω (typ) On-Resistance Flatness

* 1.6V to 5.5V Single-Supply Voltage

* High PSRR Reduces Supply Noise (-60dB typ)

* 0.08% Total Harmonic Distortion

* -68dB typ Crosstalk (100kHz)

* -64dB typ Off-Isolation (100kHz)

* Low Supply Current (0.3µA typ)

* Low Leakage Current (0.1µA typ)

* Pin-to-Pin Compatible with ST Micro STG3699

* (3mm x 3mm) 16-Pin TQFN, and (2.5mm x 2.5mm) 16-Pin Ultra-Thin QFN Packages