DS80C320-QNL+

Microcontrollers Overview

The DS80C320-QNL+ is a high-speed, low-power microcontroller compatible with the 80C32 architecture. It features an 8-bit CPU core operating at up to 33MHz with a 4-clock machine cycle. The device includes 256 bytes of on-chip RAM and addresses 64kB ROM and 64kB RAM externally. It operates within a voltage range of 4.25V to 5.5V and supports a temperature range of -40°C to +85°C. The component is housed in a 44-pin PLCC package.

Microcontrollers Feature Summary

• High-speed execution with a redesigned processor core that eliminates redundant clock cycles for faster instruction processing.
• Dual full-duplex hardware serial ports allowing simultaneous communication at independent baud rates.
• Programmable watchdog timer and early warning power-fail interrupt for enhanced system reliability.
• Dual data pointers (DPTR) to accelerate block data memory moves without additional software overhead.

Microcontrollers Applications

• High-performance upgrades to existing 80C32-based embedded systems
• Communication equipment requiring dual serial interfaces
• Industrial control systems needing robust power-fail protection

Microcontrollers Procurement Notes

Verify the specific suffix 'QNL+' indicates lead-free/RoHS compliance and the -40°C to +85°C industrial temperature range. Confirm the 44-pin PLCC package matches the target PCB footprint. Ensure the design accounts for the higher execution speed compared to standard 80C32 devices when interfacing with external memory or peripherals.

Microcontrollers Selection Notes

Select this model for applications requiring significant performance improvements over standard 8051 derivatives while maintaining pin compatibility. The 33MHz maximum clock speed offers substantial throughput gains. Consider the DS80C323 variant if lower voltage operation down to 2.7V is required instead of the 4.25V minimum specified here.

Microcontrollers Part Context

This component belongs to the Maxim Integrated DS80C320/DS80C323 family of high-speed microcontrollers. These devices are designed as direct replacements for standard 80C32 chips, offering similar peripheral sets but with significantly reduced instruction execution times. The family maintains binary compatibility with existing 8051 codebases.

Microcontrollers Replacement Considerations

Direct pin-compatible substitutes include other variants from the DS80C320 series such as DS80C320-MCL+ or DS80C320-ECL+, depending on the required package type and temperature rating. Verify that any replacement maintains the 33MHz capability and 4.25V-5.5V operating voltage range.