AT87LV52-16AC

Microcontrollers Overview

The AT87LV52 is a low-voltage, high-performance CMOS 8-bit microcomputer featuring 8K bytes of QuickFlash one-time programmable read-only memory. It operates within a 2.7V to 5.5V range and supports fully static operation from 0 Hz to 16 MHz. The device integrates 256 x 8-bit internal RAM, 32 programmable I/O lines, three 16-bit timer/counters, and eight interrupt sources. It includes a programmable serial channel and offers low-power idle and power-down modes.

Microcontrollers Feature Summary

• Compatible with industry standard MCS-51 instruction set and pinout
• Features on-chip QuickFlash OTP program memory for user programming
• Supports fully static logic operation down to zero frequency
• Includes two software selectable power saving modes

Microcontrollers Applications

• Embedded control applications requiring nonvolatile code storage
• Systems utilizing standard MCS-51 architecture compatibility
• Low-voltage embedded designs operating between 2.7V and 5.5V

Microcontrollers Procurement Notes

Verify the specific package variant (PLCC, PDIP, or TQFP) required for the target hardware design. Confirm that the application utilizes a conventional nonvolatile memory programmer capable of providing the necessary 12-volt programming enable voltage for the QuickFlash array. Ensure the design accounts for the one-time programmable nature of the memory, as it cannot be erased or reprogrammed after use.

Microcontrollers Selection Notes

Select this component when an MCS-51 compatible architecture is required alongside integrated nonvolatile program memory. It is suitable for designs needing static operation capabilities and low-power management features. Consider the 8K byte memory capacity and 256-byte RAM availability against application requirements. Verify that the system can support the external programming interface needed for initial code loading.

Microcontrollers Part Context

The AT87LV52 belongs to the Atmel AT87 series of 8-bit microcomputers. It combines a versatile 8-bit CPU with QuickFlash technology on a monolithic chip. This integration provides a flexible solution for embedded control applications by eliminating the need for separate EPROM components while maintaining compatibility with established MCS-51 development ecosystems.

Microcontrollers Replacement Considerations

AT89C51

Microcontrollers FAQ

How is the QuickFlash memory programmed?

The memory is programmed byte-by-byte using a conventional nonvolatile memory programmer. It requires a 12-volt signal on the EA/VPP pin and pulses on the ALE/PROG pin to complete self-timed write cycles.

What are the power-saving modes available?

The device supports Idle Mode, which stops the CPU but keeps peripherals active, and Power-down Mode, which freezes the oscillator and saves RAM contents until a hardware reset occurs.