The MAX4548/MAX4549 series is an ideal triple 3x2 audio/video crosspoint switch for multimedia applications.
The MAX4548 and MAX4549 are programmable triple 3x2 audio/video crosspoint switches designed for multimedia applications such as set‑top boxes, video conferencing, and high‑end audio systems. Each device contains three independent switch matrices with three inputs and two outputs, offering selectable soft‑switching (clickless) mode and shunt inputs for improved isolation.
The datasheet provides electrical characteristics, timing diagrams, and pin descriptions for both the 2‑wire I2C‑compatible MAX4548 and the 3‑wire SPI/QSPI/MICROWIRE‑compatible MAX4549. Key performance figures include low on‑resistance, high off‑isolation, and low total harmonic distortion across a wide supply voltage range of 2.7 V to 5.5 V.
| Typical On‑Resistance (5 V supply) | 22 Ω |
|---|---|
| Maximum On‑Resistance | 35 Ω |
| Off‑Isolation at 20 kHz | -85 dB |
| THD+N (1 kHz, 1 V RMS) | 0.07 % |
| Operating Temperature Range | -40 °C to +85 °C |
Typical on‑resistance is 22 Ω.
Off‑isolation is -85 dB at 20 kHz.