MAX7443/MAX7444 are low-cost, triple-channel video reconstruction filters for S-video and CVBS video signals. These devices are ideal for anti-aliasing and DAC smoothing video applications such as set-top boxes, DVD players, hard-disk recorders (HDRs), and personal video recorders. These filters operate from a single +5V supply. They are optimized for NTSC, PAL, and standard-definition digital TV (SDTV) video systems. Each channel consists of a lowpass filter and an adjustable-gain output buffer capable of driving two standard 150Ω video loads. The output buffers can drive either an AC or a DC load such that the blanking level voltage after the backmatch resistor is less than 1V. The Y and C video inputs are summed to produce the com- posite video output. The MAX7444 offers high- frequency boost to improve picture sharpness. The MAX7443 has a maximum flat-frequency response. The MAX7443/MAX7444 are available in a tiny 8-pin thin QFN and an 8-pin SO package with exposed pad, and are fully specified over the -40°C to +85°C extended temperature range.
The MAX7443 and MAX7444 are low‑cost, triple‑channel video reconstruction filters and buffers designed for composite (CVBS) and Y/C (S‑Video) signals. They are optimized for NTSC, PAL, and standard‑definition digital TV applications such as set‑top boxes, DVD players, hard‑disk recorders, and digital VCRs, operating from a single +5 V supply.
Key specifications include a typical stopband attenuation of 41 dB at 27 MHz, a passband response of –0.3 dB (typ), and adjustable output gain of 6 dB, 9.5 dB, or 12 dB. The devices are offered in tiny 8‑pin thin QFN or 8‑pin SO packages with exposed pads, each channel capable of driving two 150 Ω video loads.
| Supply Voltage Range | 4.75 V – 5.25 V |
|---|---|
| Maximum Current into Any Pin (except VCC/GND) | 450 mA |
| Stopband Attenuation (typ) | 41 dB at 27 MHz |
| Passband Response (typ) | -0.3 dB |
| Adjustable Output Gain | 6 dB, 9.5 dB, 12 dB |
| Package Options | 8‑pin thin QFN or 8‑pin SO with exposed pad |
The devices operate from a single +5 V supply with a voltage range of about 4.75 V to 5.25 V.
The stopband attenuation is typically 41 dB at 27 MHz.
They are offered in tiny 8‑pin thin QFN or 8‑pin SO packages with exposed pads.