NXP USA Inc. MC44BS374CAEFR2

The MC44BS374CA integrates a programmable RF oscillator and phase-locked loop, sound-subcarrier generation, video and audio modulation, and a high-speed I2C-compatible control interface. It was designed to convert baseband audio/video into an analog television RF output for equipment such as VCRs and set-top boxes. The bus selects the output channel, sound subcarrier, picture-to-sound ratio, standby state and test pattern.

The original LCDChip package is 16-SOIC (0.154", 3.90mm Width). NXP's SO16NB case outline gives a body width E1 of 3.8–4.0 mm, consistent with that registered narrow-body designation. The CAEF ordering suffix is the lead-free version; R2 is the tape-and-reel suffix. Use the controlled SO16NB drawing to verify lead span, pitch and pin one.

Layout checks

• Use the 3.8–4.0 mm body-width SO16NB footprint, not a wide-body SOIC.
• Keep the RF PLL filter near VCCD and decouple supplies close to ground.
• Follow the manufacturer's TVOUT 75-ohm network and crystal recommendations.

The expected 16-SOIC JPG is absent locally and returns HTTP 404 on the production site. Restore and inspect it before publication.

The MC44BS374CA SO16NB pin table defines the connections below; confirm orientation against the manufacturer's top-view drawing.

Keep the analog, digital and output-stage supply connections separate as directed in the application circuit.

Typical and maximum values are identified separately and apply under the source document's test conditions. Do not treat absolute-maximum supply as an operating value.

Later RF modulator families may offer related PAL/NTSC functions but can differ in pinout, control register map, supply current, output level and analog-TV standard support. The NXP MC44CC374 family is described as functionally related but not a direct drop-in replacement. Validate full order code, narrow SO16 footprint, firmware, RF network and approvals before substitution. No unverified LCDChip alternative is linked.

NXP hosts the Freescale MC44BS374CA technical data, Rev. 1.2, containing the CAEF,R2 ordering line, SO16NB case outline, pin table, I2C controls and electrical characteristics. NXP currently labels the MC44BS374CA product family as no longer manufactured; this statement concerns manufacturer lifecycle and does not assert LCDChip inventory availability.

Verify traceability, CAEF lead-free marking, narrow SO16NB dimensions, pin-one orientation and reel packaging against controlled records. Test I2C address response, audio/video inputs, carrier frequency and output level in a representative fixture before use in a legacy system.

Confirm the regional television standard, channel plan, RF output network, I2C configuration and system regulatory requirements. Review NXP's lifecycle status and the exact CAEF,R2 marking. Restore and visually inspect the production package JPG before formal publication.