MC44BC373/374 is a modulator IC from Motorola. It is designed for use in VCRs, games, set-top boxes, and similar devices.
The MC44BC373/374 is a multi‑standard PAL/SECAM/NTSC video modulator with an integrated antenna booster/splitter, intended for use in VCRs, set‑top boxes, game consoles and similar devices. It includes a high‑speed I²C‑compatible bus, PLL‑based channel synthesis, on‑chip video test pattern generator and programmable sound subcarrier oscillator.
Key features include pin‑to‑pin compatibility with previous versions, low external component count, programmable picture‑to‑sound ratio, robust ESD protection, and a built‑in antenna booster covering 40 MHz to 860 MHz. The document details electrical characteristics, maximum ratings, bit‑mapping for bus programming, and test modes.
| Operating supply voltage range | 4.5 V – 5.5 V |
|---|---|
| Total supply current (all sections active) | 75 mA (typical) |
| Standby mode supply current | 34 mA (typical) |
| Maximum operating ambient temperature | 75 °C |
| Minimum operating ambient temperature | -10 °C |
| Package | TSSOP‑24 |
The device operates from 4.5 V to 5.5 V supply voltage.
The maximum operating ambient temperature is 75 °C.
The IC supports a high‑speed I²C‑compatible bus up to 800 kHz.