The M52325AP is designed for SECAM chrominance decoding.The IC should preferably be used in conjunction with PAL / NTSC signal processor M52340SP and the switched capacitor baseband delay line. It consists of a bell filter,a demodulator and an identification circuit. The IC needs no adjustment and few external components are required. A signal with highly stable reference frequency is required for the calibration, and a three - level sandcastle pulse for blanking and burst gating.