AT89C52-12PA Microchip Integrated Circuit (Dual-In-Line Packages) In Stock
Microchip AT89C52-12PA is an 8-bit 8051-compatible MCU featuring 8KB Flash, 256B RAM, three 16-bit timers, and UART in a 40-pin DIP, running at up to 12 MHz for cost-effective embedded control and legacy system designs.
- Manufacturer
- Microchip
- Package
- Dual-In-Line Packages
- Pin Count
- 40
- Lifecycle
- ACTIVE
- Datasheet
- AT89C52-12PA Datasheet PDF
- Category
- Integrated Circuit
- RoHS
- Compliant
- Lead Time
- 3–7 business days
- Shipping
- DHL Express · Worldwide
Key Features
- 8 KB on-chip Flash with 1000-cycle erase/write endurance supports firmware updates in field-deployed systems
- Full 8051 instruction set compatibility allows reuse of existing 8051 firmware and development tools with zero porting effort
- Three 16-bit timers/counters enable flexible timing, PWM generation, and event counting in a single device
- 40-pin DIP package supports breadboard prototyping and through-hole PCB assembly for education and legacy industrial designs
Applications
The AT89C52-12PA targets industrial control panels, home automation relays, educational microcontroller training kits, and legacy 8051 replacement designs where an established instruction set and through-hole DIP-40 assembly are preferred. Its 8 KB Flash and on-chip UART support simple serial communication protocols in motor drives, vending machines, and building automation nodes. The 12 MHz operating frequency and three 16-bit timers provide sufficient real-time control capability for cost-sensitive mid-volume production designs that do not require 32-bit processing power.
Compliance & Regulatory
| RoHS Status | Compliant |
| Lead-Free | Yes (Pb-Free) |
Alternate & Equivalent Parts
Compatible alternatives and drop-in replacements for AT89C52-12PA:
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Frequently Asked Questions
How much program memory does the AT89C52-12PA include and how many times can it be reprogrammed?
The AT89C52-12PA provides 8 KB of on-chip Flash program memory rated for a minimum of 1000 erase and write cycles, enabling field firmware updates or iterative development without replacing the IC, which is sufficient for most industrial control and educational prototyping applications.
At what clock speed does the AT89C52-12PA execute instructions and how does this affect real-time control?
The AT89C52-12PA operates at up to 12 MHz with the standard 8051 instruction cycle of 12 clock periods per machine cycle, yielding approximately 1 MIPS throughput; this is adequate for low-complexity real-time tasks such as relay sequencing, keypad scanning, and UART communication at baud rates up to 9600 bps or higher.
How many timers does the AT89C52-12PA provide compared to a basic AT89C51?
The AT89C52-12PA includes three 16-bit programmable timers and counters (Timer 0, Timer 1, and Timer 2), one more than the two timers found on the AT89C51, giving designers an additional channel for simultaneous timing tasks such as baud rate generation, PWM, and independent event capture without software overhead.
Is the AT89C52-12PA suitable for breadboard prototyping and small-batch through-hole PCB builds?
Yes, the AT89C52-12PA is packaged in a 40-pin 600-mil DIP that fits standard 0.1-inch breadboards and through-hole PCBs directly, making it ideal for classroom prototyping, hobbyist projects, and low-volume production runs where SMT assembly equipment is unavailable or not cost-justified.
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