AT89C2051-24SU The AT89C2051-24SU is an 8-bit microcontroller from Microchip Technology featuring 2KB of Flash memory, 128 bytes of RAM, and 15 I/O lines in a 20-SOIC package.
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AT89C2051-24SU

Available from 5 distributors
Mfr Name: Microchip Technology
Microchip Technology
The AT89C2051-24SU is an 8-bit microcontroller from Microchip Technology featuring 2KB of Flash memory, 128 bytes of RAM, and 15 I/O lines in a 20-SOIC package.
✓ Total Stock: 20,614 pcs

AT89C2051-24SU Available from 5 distributors

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AT89C2051-24SU Specifications Quick View

Most important parameters for selection – full specs in datasheet.
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Core Processor
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Peripherals
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AT89C2051-24SU Description

Short technical summary and product information.

The AT89C2051-24SU is an 8-bit CMOS microcontroller based on the 8051 architecture, manufactured by Microchip Technology. It integrates 2KB of reprogrammable Flash memory with endurance of 10,000 write/erase cycles, 128 bytes of internal RAM, and 15 programmable I/O lines. The device operates at a maximum clock frequency of 24 MHz with a supply voltage range of 2.7V to 6V (full static operation down to 0 Hz).

 

Key peripherals include two 16-bit timer/counters, a full-duplex UART serial port, an on-chip analog comparator, and direct LED drive outputs. The microcontroller supports six interrupt sources with two priority levels and offers low-power Idle and Power-down modes. The internal oscillator eliminates the need for external clock components.

 

The AT89C2051-24SU is housed in a 20-lead SOIC package (0.295" width, 7.50mm pitch) with surface mount mounting. The operating temperature range is -40°C to +85°C, making it suitable for industrial environments. This device is compatible with the standard MCS-51 instruction set and provides a flexible, cost-effective solution for embedded control applications.

AT89C2051-24SU Quick Information

Product Type: Microcontroller
Series: 89C
Canonical Name: Microchip Technology AT89C2051-24SU 8-bit Microcontroller with 2KB Flash
Subcategory: 8-bit Microcontroller

AT89C2051-24SU Compliance

RoHS Status: RoHS Compliant
Moisture Sensitivity Level (MSL): 1 Unlimited
REACH Status: REACH Unaffected

AT89C2051-24SU Features

  • 8-bit 8051 core with 24 MHz max clock frequency.
  • 2KB on-chip Flash memory with 10k write/erase cycles.
  • 15 programmable I/O lines with direct LED drive capability.
  • Includes UART, two 16-bit timers, and analog comparator.
  • Wide supply voltage range: 2.7V to 6V.

AT89C2051-24SU Applications

  • Embedded control for consumer appliances
  • Industrial automation and sensor interfaces
  • Battery-powered portable device control
  • LED display and lighting controllers
  • Serial communication gateway modules

AT89C2051-24SU FAQs

7 frequently asked questions generated from this part’s specifications.
What is the supply voltage range of the AT89C2051-24SU?

The DB records a supply voltage of 4V-6V, while the datasheet specifies an operating range of 2.7V to 6V. For 24MHz operation, a minimum supply of 4V is recommended.

What package does the AT89C2051-24SU come in?

It comes in a 20-SOIC (0.295", 7.50mm Width) surface mount package.

What is the operating temperature range?

The operating temperature range is -40°C to +85°C.

Is the AT89C2051-24SU RoHS compliant?

It is marked as RoHS3 compliant and REACH unaffected, but compliance has not been verified with certificates.

How much program memory does it have?

It has 2KB (2K x 8) of Flash memory with 10,000 write/erase cycles endurance.

How many I/O pins does it have?

It has 15 programmable I/O lines.

What peripherals are included on-chip?

Two 16-bit timer/counters, a full-duplex UART serial port, an on-chip analog comparator, direct LED drive outputs, and six interrupt sources.

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