MC44BS373CAD

Specialized ICS Overview

The MC44BS373CAD is a multi-standard NTSC/PAL/SECAM audio/video modulator manufactured by NXP USA Inc. in a 16-SOIC package. It integrates a high-speed I2C-compatible bus receiver and a phase-locked loop (PLL) to tune the UHF range (channels 21–69). The device features an on-chip programmable sound subcarrier oscillator supporting frequencies of 4.5, 5.5, 6.0, and 6.5 MHz. It provides a typical TV output level of 82 dBµV and supports VHF operation via internal dividers. The component operates within a temperature range of –20°C to +85°C.

Specialized ICS Feature Summary

• Multi-standard support for NTSC, PAL, and SECAM systems
• Integrated PLL with on-chip UHF oscillator eliminating external varicaps or tuned components
• High-speed I2C bus compatible at 800 kHz with 5-V and 3.3-V compatibility
• On-chip video test pattern generator with 1-kHz audio test signal

Specialized ICS Applications

• Video Cassette Recorders (VCRs)
• Set-top boxes
• Audio/Video equipment

Specialized ICS Procurement Notes

Verify the specific ordering suffix 'R2' if tape and reel packaging is required, as the base part number may default to tube packaging. Confirm that the 16-SOIC package variant does not include the CAS pin address selection feature, which is exclusive to the QFN20 package option.

Specialized ICS Selection Notes

Select this model for designs requiring a 16-pin surface-mount solution. Note that the SO16NB package lacks the AUXIN pin and direct RF sound modulator input found in the QFN20 version. Ensure the application utilizes a 4-MHz crystal oscillator for the PLL reference frequency.

Specialized ICS Part Context

This component belongs to the MC44BS373 family, representing an evolution over the MC44BC373/4C series. Key improvements include a higher output level (82 versus 74.5 dBµV), improved video signal-to-noise ratio (+3 dB), and lower power consumption in standby modes.

Specialized ICS Replacement Considerations

Functionally equivalent parts include the MC44CC373CAEF and MC44BS373CAFC. However, these are not direct drop-in replacements due to differences in package type and pinout configuration.