AT89C51-24PC Microchip Integrated Circuit (Dual-In-Line Packages) In Stock
Microchip AT89C51-24PC is an 8-bit 8051-compatible microcontroller running at up to 24 MHz with 4 KB of in-system programmable Flash and 128 bytes of RAM in a 40-pin DIP package. Available from stock with worldwide shipping.
- Manufacturer
- Microchip
- Package
- Dual-In-Line Packages
- Pin Count
- 40
- Lifecycle
- ACTIVE
- Datasheet
- AT89C51-24PC Datasheet PDF
- Category
- Integrated Circuit
- Price
- From $3.9150(MOQ 1)
- RoHS
- Compliant
- Lead Time
- 3–7 business days
- Shipping
- DHL Express · Worldwide
Key Features
- 8051-compatible 8-bit CPU core operating at up to 24 MHz enables direct code reuse from the vast legacy 8051 software ecosystem
- 4 KB in-system programmable Flash memory with 1000-cycle endurance allows field firmware updates without removing the chip from the board
- 40-pin DIP package with 32 I/O lines simplifies prototyping on breadboards and is easy to socket for low-volume or educational designs
Applications
The AT89C51-24PC is ideal for cost-sensitive embedded control applications such as home appliance controllers, industrial relay panels, and educational microcontroller training boards that rely on the widely supported 8051 instruction set. Its 4 KB Flash and 24 MHz clock provide enough processing headroom for simple sensor reading, keypad scanning, and character LCD driving tasks. The 40-pin DIP form factor makes it a natural fit for through-hole prototyping environments and retrofit designs replacing obsolete EPROM-based 8051 variants.
Compliance & Regulatory
| RoHS Status | Compliant |
| Lead-Free | Yes (Pb-Free) |
Alternate & Equivalent Parts
Compatible alternatives and drop-in replacements for AT89C51-24PC:
Frequently Asked Questions
What clock speed and memory resources does the AT89C51-24PC offer for embedded control tasks?
The AT89C51-24PC runs at up to 24 MHz and includes 4 KB of in-system programmable Flash plus 128 bytes of internal RAM. These resources are sufficient for straightforward 8-bit control loops, UART communication, and simple state machines in low-cost appliance and industrial designs.
How does the AT89C51-24PC fit into a prototyping workflow compared to surface-mount microcontrollers?
The 40-pin DIP package plugs directly into a standard 40-pin DIP socket or breadboard, eliminating the need for soldering or an adapter board during development. This accelerates iteration for low-volume and educational projects, while the 32 general-purpose I/O lines allow direct connection to sensors, displays, and relays.
Is the AT89C51-24PC software-compatible with other 8051 family microcontrollers?
Yes, the AT89C51-24PC uses the standard 8051 instruction set, meaning existing assembly or C code written for MCS-51 compatible devices runs without porting effort. This is a significant advantage for designs migrating from older NMOS 8051 parts or inheriting legacy firmware from prior product generations.
How many times can the Flash memory in the AT89C51-24PC be reprogrammed, and what does that mean for maintenance?
The on-chip 4 KB Flash supports at least 1000 erase/write cycles, allowing firmware to be updated in the field via ISP without replacing the chip. This is adequate for most product lifetime update scenarios, including factory calibration adjustments and minor firmware patches.
Related Guides
1206 100 uF MLCC Design Guide for Compact Bulk Decoupling
Design guidance for applying CL31A107MQHNNNE and related 1206 MLCCs in compact bulk decoupling networks.
Jul 3, 2026
0402 10 nF MLCC Design Guide for High-Speed Decoupling
Practical design guidance for using CL05B103KB5NNNC and related 0402 MLCCs in high-speed decoupling networks.
Jul 3, 2026
CL31A107MQHNNNE 1206 100 uF MLCC Selection Guide
How to choose CL31A107MQHNNNE and related 1206 MLCCs for low-voltage bulk capacitance and regulator stability.
Jul 2, 2026
CL05B103KB5NNNC 0402 10 nF X7R MLCC Selection Guide
How to choose CL05B103KB5NNNC and related 0402 MLCCs for bypassing, filtering, voltage derating, and sourcing.
Jul 2, 2026
Why Buy from FindMyChip
About Microchip
Microchip is a leading electronic component manufacturer. FindMyChip sources Microchip ICs directly from authorized China distributors, offering competitive pricing and reliable stock.
| Qty. | Unit Price | Ext. Price |
|---|---|---|
| 1+ | $7.8300 | $7.83 |
| 2+ | $5.2200 | $10.44 |
| 6+ | $3.9150 | $23.49 |
In Stock · 24h Response · Worldwide Shipping
Response within 24 hours · Worldwide shipping
“FindMyChip sourced our entire STM32 BOM in 48 hours when our usual distributor had 16-week lead times.”