AT89S52-24AUA1 Microchip Integrated Circuit (Quad Flat Packages) In Stock
AT89S52-24AUA1 is a Microchip 8-bit 8051-compatible MCU with 8 KB Flash and 256 bytes RAM, running at up to 24 MHz in a 44-pin TQFP package. It integrates 3 timers and an on-chip UART for versatile embedded control applications. Available worldwide for fast shipping in prototype and production volumes.
- Manufacturer
- Microchip
- Package
- Quad Flat Packages
- Pin Count
- 44
- Lifecycle
- ACTIVE
- Datasheet
- AT89S52-24AUA1 Datasheet PDF
- Category
- Integrated Circuit
- RoHS
- Compliant
- Lead Time
- 3–7 business days
- Shipping
- DHL Express · Worldwide
Key Features
- 8 KB in-system programmable Flash with 4-wire SPI interface for easy field updates and in-circuit programming
- 24 MHz maximum clock speed with full-static operation down to 0 Hz and low-power idle/power-down modes
- 44-pin TQFP package with 32 I/O pins, 3 timers, and on-chip UART for rich peripheral integration
Applications
The AT89S52-24AUA1 is ideal for embedded control tasks in industrial automation, consumer electronics, and instrumentation where 8051 architecture compatibility and in-system programmability are required. Its 8 KB Flash and 256-byte RAM support firmware tasks such as sensor interfacing, motor control, and communication protocol handling. The 44-pin TQFP package and industrial temperature range of -40°C to +85°C make it suitable for compact, ruggedized designs.
Compliance & Regulatory
| RoHS Status | Compliant |
| Lead-Free | Yes (Pb-Free) |
Alternate & Equivalent Parts
Compatible alternatives and drop-in replacements for AT89S52-24AUA1:
Frequently Asked Questions
Which clock speeds and supply voltage range does the AT89S52-24AUA1 support in embedded designs?
The AT89S52-24AUA1 operates at clock frequencies up to 24 MHz and a supply voltage of 4.0 V to 5.5 V, supporting standard 5 V embedded systems while enabling full-static operation down to 0 Hz for power-sensitive applications requiring minimal active current consumption.
How can the AT89S52-24AUA1 be reprogrammed in a system without removing it from the board?
The AT89S52-24AUA1 supports in-system programming via a 4-wire SPI interface, allowing engineers to update its 8 KB Flash without removing the 44-pin TQFP device from the PCB, significantly reducing rework time in both production and field firmware update scenarios.
Is the AT89S52-24AUA1 backward compatible with legacy 8051 firmware and peripherals?
Yes, the AT89S52-24AUA1 is fully compatible with the MCS-51 instruction set, executing standard 8051 code on its 8-bit core with 256 bytes of on-chip RAM and 8 KB of Flash, allowing reuse of existing firmware and reducing development time for new product designs.
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