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UPD765AC-2 Specifications

Detailed technical information and Application Scenarios

Product Details

PartNumberManufactorQuantityAvailability
UPD765AC-2NEC397Yes

UPD765AC-2** is a floppy disk controller (FDC) IC manufactured by **NEC**.

The UPD765AC-2 is a floppy disk controller (FDC) IC manufactured by NEC.

Specifications:

  • Manufacturer: NEC (now part of Renesas Electronics)
  • Part Number: UPD765AC-2
  • Type: Floppy Disk Controller (FDC)
  • Interface: Compatible with Intel 8272A
  • Data Transfer Rate: Supports 250/300/500 kbps
  • Supply Voltage: +5V
  • Operating Temperature: Commercial (0°C to +70°C)
  • Package: 40-pin DIP (Dual In-line Package)
  • Technology: CMOS

Descriptions & Features:

  • Supports IBM-compatible floppy disk formats (single/double density).
  • Handles MFM (Modified Frequency Modulation) encoding/decoding.
  • Provides DMA (Direct Memory Access) and interrupt-driven data transfer.
  • Supports dual-drive configurations.
  • Includes data separator and write pre-compensation circuitry.
  • Used in PC/XT/AT-compatible systems and early floppy disk drives.

This IC was widely used in 1980s and early 1990s computing systems for floppy disk control.

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