P89C54X2BA SemiConductor - PLCC44 - Generic Make

87C52X2-MC Integrated Circuit - PLCC44 - NXP Semiconductors

TS87C52X2-MCB Semiconductor - PLCC44 - Temic

QUQZ77KHZ5C2 Semiconductor - Standard Case - Generic Make

87C52X2-LCB Integrated Circuit - PLCC44 - NXP Semiconductors

PC16552DV (X2 CHIPS) NSC SEMI 2 CHANNEL UART INTERFACE PLCC44 SMD UK IN STOCK

SC87C51CCA44 Integrated Circuit - PLCC44 - Generic Make

PC16550DV (x2 CHIPS PER SALE) ORIGINAL NSC SEMI IC UART WITH FIFO 44-PLCC UKSTK