The MAX4740/MAX4740H are analog switches with low on-resistance (0.61Ω typ) that operate from a single 1.6V to 5.5V supply. These switches are quad, single-pole, double-throw (SPDT) switches and are designed for routing audio signals. The MAX4740/MAX4740H are pin-to-pin compatible 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. The 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 helps to increase battery life. These switches are available in a tiny 3mm x 3mm, 16-pin TQFN-EP, and 2.5mm x 2.5mm, 16-pin ultra-thin QFN packages.
The MAX4740 and MAX4740H are quad single‑pole double‑throw (SPDT) analog switches designed for routing audio signals. They operate from a single 1.6 V to 5.5 V supply and feature two digital control inputs (CB1, CB2) that select the switch state. The devices are pin‑to‑pin compatible with the STG3699 analog switch and are offered in 3 mm × 3 mm 16‑pin TQFN and 2.5 mm × 2.5 mm ultra‑thin QFN packages.
Key specifications include a typical on‑resistance of 0.61 Ω, on‑resistance matching of 0.06 Ω, supply current of 0.3 µA, and operation over –40 °C to +85 °C. Electrical characteristics such as turn‑on/off times, leakage currents, and crosstalk are provided for design verification.
| Supply Voltage Range | 1.6 V to 5.5 V |
|---|---|
| Typical On‑Resistance | 0.61 Ω |
| On‑Resistance Match | 0.06 Ω |
| Supply Current | 0.3 µA typ |
| Operating Temperature Range | -40 °C to +85 °C |
| Package Options | 3 mm × 3 mm 16‑pin TQFN and 2.5 mm × 2.5 mm ultra‑thin QFN |
| Number of Control Inputs | 2 (CB1, CB2) |
The devices operate from a single 1.6 V to 5.5 V supply.
It has two digital control inputs, labeled CB1 and CB2.
The typical on‑resistance is 0.61 Ω.
They are offered in 3 mm × 3 mm 16‑pin TQFN and 2.5 mm × 2.5 mm ultra‑thin QFN packages.