The HSP50210JI-52 from Harris Corporation is a digital Costas loop demodulator Integrated Circuit for AM and FM, rated at 52 MHz, in an 84-PLCC (29.31x29.31) package.
The HSP50210JI-52Z from Renesas Electronics America Inc is an AM/FM demodulator Integrated Circuit with 52 MHz operation, in an 84-PLCC (29.31x29.31) package.