UMC UM9228-1
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. The UM9228-1 operates from a +5 Volt supply and simply requires a 16 MHz external clock input.| Part No. | UM9228-1 |
|---|---|
| Datasheet | UM9228-1 Download |
| Manufacturer |  UMC |
| Description | Floppy Disk Separator |
| Buy | Stock & Price |
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
● Compatible with the FOC 765A (8272A) floppy disk controllers
● DMA inte"rface logic
● CMOS technology
● .Single + 5 Volt supply
● TT L compatible
● For IBM PC disk drives especially
GENERAL DESCRIPTION
A -FDC 765A together with UM9228-1 and some buffers qrive and decoder can be formed a IBM PC diskette adapter. All input and outpu
