TDA9874AH/V2,557

Overview

The TDA9874AH/V2,557 is a single-chip Digital TV Sound Demodulator/Decoder (DTVSD) manufactured by NXP USA Inc. It supports analog and digital multi-channel sound systems for TV, VCR, and satellite receivers. The device integrates SIF input switching, AGC, an 8-bit ADC, DQPSK demodulation, NICAM decoding, and dual-carrier FM demodulation. It features I2C control, I2S audio output, and dual audio DACs. Operating on a 4.5V to 5.5V supply, it is housed in a 44-QFP package with an operating temperature range of -20°C to 70°C.

Feature Summary

• Supports B/G, D/K, I, M, and L standards including A2 and NICAM systems
• Integrates DQPSK demodulation for NICAM and 2-carrier FM demodulation
• Includes dual audio DACs with 15-bit resolution and analog crossbar switch
• Controlled via I2C-bus with slave addresses selectable by ADDR1 and ADDR2 pins

Applications

• Analog and digital multi-channel sound systems in TV sets
• VCR sets with digital sound processing requirements
• Satellite receivers supporting Astra and similar specifications

Procurement Notes

This component is marked as discontinued by the manufacturer as of August 22, 2021. Verification of availability should focus on distributor surplus or secondary market sources. Ensure the specific suffix /V2,557 matches the required RoHS3 compliance and packaging format if sourcing from alternative channels.

Selection Notes

Select this IC for applications requiring comprehensive support for European, Korean, and Asian TV standards including NICAM and A2. It is suitable for designs needing integrated demodulation and decoding without external DSPs. Verify that the system design accommodates the 44-QFP surface mount package and provides the necessary 24.576 MHz crystal oscillator.

Part Context

The TDA9874A belongs to the TDA987 series of digital TV sound processors. The AH variant specifically denotes the plastic quad flat package (QFP44) with a body size of 14x14 mm. This part supersedes earlier versions from December 1999 and is designed for high-volume consumer electronics manufacturing.

Replacement Considerations

Publicly confirmed substitute part numbers are not available in the provided documentation. As the product is discontinued, engineers must evaluate functional equivalents from other manufacturers that support the same standard combinations and interface requirements.