SL486 – GEC PLESSEY

The SL486, manufactured by GEC Plessey, is a wideband FM IF amplifier and quadrature demodulator integrated circuit. Date code 96 indicates a manufacturing date in 1996. Functionally, it accepts an intermediate frequency (IF) signal, typically 10.7 MHz, and amplifies it through a series of gain stages. The integrated quadrature demodulator recovers the baseband audio signal from the FM carrier. External components are required to establish the resonant frequency of the quadrature tank circuit, which is critical for proper demodulation. The SL486 is a single-conversion FM receiver building block, suitable for applications requiring a compact and low-power FM demodulation solution. This particular part is designated as non-RoHS compliant, indicating the presence of lead or other restricted substances as defined by the Restriction of Hazardous Substances directive.