COP8780CJ

Overview

The COP8780CJ is an 8-bit microcontroller from the COP8 family, manufactured by National Semiconductor. It features a UV-erasable EPROM program memory with a capacity of 4KB and 128 bytes of RAM. The device operates within a supply voltage range of 4.5V to 6V and supports an external oscillator type. It is designed for through-hole mounting in a DIP-40 package. The operating temperature range extends from -40°C to 85°C. Key connectivity includes Microwire/Plus (SPI) interfaces, and it provides 36 I/O lines along with PWM peripherals.

Feature Summary

• Incorporates the COP8 8-bit core processor architecture for efficient control applications.
• Utilizes UV-erasable EPROM technology for non-volatile program storage.
• Supports Microwire/Plus serial communication interface for data exchange.
• Integrates Pulse Width Modulation (PWM) peripherals for motor or lighting control.

Applications

• Industrial control systems requiring robust 8-bit processing
• Consumer appliances utilizing PWM functionality
• Embedded systems needing SPI connectivity

Procurement Notes

Verify the specific manufacturer source, as National Semiconductor's microcontroller assets were acquired by Texas Instruments. Ensure the component matches the original National Semiconductor specifications rather than potential legacy rebrands. Confirm the package type is DIP-40 and that the UV-EPROM variant is correctly identified, as OTP versions may exist within the same series. Check for authenticity markers consistent with National Semiconductor production standards.

Selection Notes

Select this component when a dedicated 8-bit MCU with UV-erasable memory is required for cost-sensitive designs. The COP8780CJ is suitable for applications where external oscillator timing is preferred over internal RC oscillators. Consider the 36 available I/O pins and integrated PWM features if peripheral count is limited. Ensure the design accommodates the 4.5V to 6V supply requirement and through-hole packaging constraints.

Part Context

The COP8780CJ belongs to the COP8™ 87xx series, a line of 8-bit microcontrollers known for their simplicity and low power consumption. This series was widely used in embedded control applications before the transition to more modern architectures. The COP8 core offers a straightforward instruction set optimized for control tasks, making it a staple in legacy industrial and consumer electronics designs.

Replacement Considerations

Direct pin-to-pin replacements are not explicitly documented in public sources for this specific UV-EPROM variant. Cross-reference with other COP87xx series members like COP8782CJ for functional similarities, but verify memory type and pin compatibility carefully. Modern equivalents would require significant architectural redesign due to differences in core architecture and programming interfaces.