The MAX9541/MAX9542 are quadruple-channel, 2:1 video mux amplifiers with input sync tip clamps. These devices select between two video sources and support up to four channels on each source. The MAX9541 has integrated lowpass filters that are optimized for standard-definition video signals such as composite and red, green, blue (RGB). The filters typically have ±1dB pass-band flatness out to 9.5MHz and 47dB attenuation at 27MHz. The MAX9542 has a wider bandwidth of 15MHz because it does not have integrated lowpass filters, mak-ing it suitable for not only standard-definition video sig- nals, but also video graphics array (VGA) signals with a 640 x 480 resolution at up to 85Hz refresh rate. Video signals are AC-coupled to the inputs of the MAX9541/MAX9542. The input sync-tip clamps set the internal DC level. The amplifiers have 2V/V gain, and the outputs can be DC-coupled to a 75Ω load, which is the equivalent of two video loads, or AC-coupled to a 150Ω load. Both the MAX9541/MAX9542 feature a low-power shut- down mode, in which supply current is reduced to 35µA. Applications Automotive Infotainment Features ♦ Quad 2:1 Video Mux Amplifiers ♦ Reconstruction Filters with 9.5MHz Passband and 47dB Attenuation at 27MHz (MAX9541) ♦ Fixed Gain of 2V/V ♦ Input Sync-Tip Clamps ♦ Shutdown ♦ 2.7V to 3.6V Single-Supply Operation
The MAX9541 and MAX9542 are quadruple‑channel, 2:1 video mux amplifiers that select between two video sources. MAX9541 includes integrated low‑pass filters optimized for standard‑definition signals, while MAX9542 offers a wider 15 MHz bandwidth suitable for VGA signals. Both devices provide a fixed gain of 2 V/V, input sync‑tip clamps, and low‑power shutdown mode.
The datasheet details absolute maximum ratings, electrical characteristics, typical operating curves, and package information (16‑pin QSOP). Ordering information and contact details for Maxim Integrated are also included.
| Supply Voltage Range | 2.7 V to 3.6 V |
|---|---|
| Quiescent Supply Current (no load) | 21 mA min, 45 mA typ |
| Shutdown Supply Current | 35 µA min, 70 µA typ |
| Input Sync‑Tip Clamp Level | 0.23 V min, 0.39 V max |
| Fixed Gain | 2 V/V |
| Power‑Supply Rejection Ratio | 20 dB at 100 kHz |
| Package Type | 16‑pin QSOP (E16‑4) |
The devices operate from 2.7 V to 3.6 V single‑supply.
In shutdown mode the supply current is typically 35 µA (up to 70 µA).
Both amplifiers provide a fixed gain of 2 V/V.
They are supplied in a 16‑pin QSOP package (E16‑4).