UM9228-1 Datasheet (UMC) - Floppy Disk Separator

UM9228-1, Floppy Disk Separator

The UM9228-1 is an CMOS integrated circuit desi~ned to complement the 765A (8272A) type of floppy disk controller chip; especially for IBM PC.

It incorporates a data separator, write precompensation logic, and DMA interface logic.

A -FDC 765A together with UM9228-1 and some buffers qrive and decode

UM9228-1 Features

* Floppy Data Separator Performs complete data separation function with a little external circuit for floppy disk drives Separates MFM encoded data 5%" double density compatible

* Early and late 250 ns write precompensation

* External 16 MHz clock required

* Compatib