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UM6551A Datasheet Asynchronous Communication Interface Adapter

Manufacturer: UMC

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Download the UM6551A datasheet PDF. This datasheet also includes the UM6551 variant, as both parts are published together in a single manufacturer document.

Datasheet Details

Part number UM6551A
Manufacturer UMC
File Size 333.45 KB
Description Asynchronous Communication Interface Adapter
Download UM6551A Download (PDF)

General Description

The UM6551 is an Asynchronous Communication Adapter (

Key Features

  • On-chip baud rate generator: 15 programmable baud rates derived from a standard 1.8432 MHz external crystal (50 to 19,200 baud).
  • Programmable interrupt and status register to simplify software design.
  • Single +5 volt power supply.
  • Serial echo mode.
  • False start b it detect io n.
  • 8-bit bi-directional data bus for direct communica- tion with the microprocessor.
  • External 16x clock input for non-standard baud rates (up to 125k baud).