TDA9874A is a digital TV sound demodulator/decoder produced by Philips Semiconductors. It supports multiple standards and has features such as SIF input switch, SIF automatic gain control (AGC) and more.
The Philips TDA9874A is a single‑chip digital TV sound demodulator/decoder designed for analog and digital multi‑channel sound systems in TV, VCR and satellite receivers. It supports a wide range of standards (B/G, D/K, L, M, NICAM, etc.) and offers features such as SIF input switching, automatic gain control, and dual‑audio DACs.
The document provides detailed functional descriptions, block diagrams, pin configurations, ordering information for SDIP42 and QFP44 packages, and electrical characteristics such as bandwidth, gain control range, and carrier frequency limits.
| SIF Automatic Gain Control (AGC) range | 24 dB |
|---|---|
| SIF ADC resolution | 8‑bit |
| Analog path bandwidth | 20 kHz |
| Package (SDIP42) | plastic shrink dual in‑line, 42 leads |
| Package (QFP44) | plastic quad flat, 44 leads |
| Satellite sound carrier frequency range | 4 – 9.2 MHz |
The analog audio path provides a bandwidth of 20 kHz.