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AT89C4051 - 8-Bit Microcontroller

Download the AT89C4051 datasheet PDF. This datasheet also covers the AT8 variant, as both devices belong to the same 8-bit microcontroller family and are provided as variant models within a single manufacturer datasheet.

General Description

The AT89C4051 is a low-voltage, high-performance CMOS 8-bit microcontroller with 4K bytes of Flash programmable and erasable read-only memory.

The device is manufactured using Atmel’s high-density nonvolatile memory technology and is compatible with the industry-standard MCS-51 instruction set.

Key Features

  • Compatible with MCS®51 Products.
  • 4K Bytes of Reprogrammable Flash Memory.
  • Endurance: 10,000 Write/Erase Cycles.
  • 2.7V to 6V Operating Range.
  • Fully Static Operation: 0 Hz to 24 MHz.
  • Two-level Program Memory Lock.
  • 128 x 8-bit Internal RAM.
  • 15 Programmable I/O Lines.
  • Two 16-bit Timer/Counters.
  • Six Interrupt Sources.
  • Programmable Serial UART Channel.
  • Direct LED Drive Outputs.
  • On-chip.

📥 Download Datasheet

Note: The manufacturer provides a single datasheet file (AT8-9C405.pdf) that lists specifications for multiple related part numbers.

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Full PDF Text Transcription (Reference)

The following content is an automatically extracted verbatim text from the original manufacturer datasheet and is provided for reference purposes only.

View original datasheet text
Features • Compatible with MCS®51 Products • 4K Bytes of Reprogrammable Flash Memory – Endurance: 10,000 Write/Erase Cycles • 2.7V to 6V Operating Range • Fully Static Operation: 0 Hz to 24 MHz • Two-level Program Memory Lock • 128 x 8-bit Internal RAM • 15 Programmable I/O Lines • Two 16-bit Timer/Counters • Six Interrupt Sources • Programmable Serial UART Channel • Direct LED Drive Outputs • On-chip Analog Comparator • Low-power Idle and Power-down Modes • Brown-out Detection • Power-On Reset (POR) • Green (Pb/Halide-free/RoHS Compliant) Packaging 1. Description The AT89C4051 is a low-voltage, high-performance CMOS 8-bit microcontroller with 4K bytes of Flash programmable and erasable read-only memory.