COP8SCR9HLQ8

Overview

The COP8SCR9HLQ8 is an 8-bit microcontroller from the COP8 family, manufactured by National Semiconductor (now Texas Instruments). It features a CMOS architecture with on-chip Flash memory and operates at a maximum clock frequency of 20 MHz. The device is housed in a 44-lead Plastic Quad Flatpack (PQCC) package. Key integrated peripherals include two analog comparators, a full-duplex USART, three multi-function 16-bit timer/counters with PWM capabilities, and MICROWIRE/PLUS interface support. It supports a supply voltage range of 2.7V to 5.5V and includes power-saving HALT/IDLE modes.

Feature Summary

• Integrates two analog comparators for signal conditioning without external components
• Includes a full-duplex USART for serial communication
• Features three multi-function 16-bit timer/counters with PWM output
• Supports MICROWIRE/PLUS serial interface protocol

Applications

• Complex control applications requiring larger memory capacity
• Systems utilizing analog comparators for threshold detection
• Applications necessitating full-duplex serial communication via USART
• Motor control or lighting systems using PWM timer outputs

Procurement Notes

Verify the specific suffix 'LQ8' against official National Semiconductor/Texas Instruments documentation to confirm pinout, temperature grade, and package variant. Ensure compatibility with existing development tools such as EPROM emulators or programmers designed for the COP8SG/SR family. Confirm RoHS compliance status if required for your manufacturing process, as older stock may vary.

Selection Notes

Select this component when an 8-bit controller with integrated analog comparators and USART is required. It is suitable for designs needing up to 32k bytes of program memory and 512 bytes of RAM. Consider the PQCC44 package size constraints and the 2.7V to 5.5V operating voltage range during schematic design. Evaluate if the 20 MHz maximum clock speed meets the real-time processing requirements of the target application.

Part Context

This part belongs to the COP8SG/SR family of 8-bit CMOS microcontrollers. These devices are known for high integration, combining CPU core, memory, and peripheral functions on a single chip. The family is designed for cost-sensitive applications requiring robust performance with minimal external components. National Semiconductor was acquired by Texas Instruments, which continues to support the lineage through compatible successors or legacy management.

Replacement Considerations

Check for direct form-fit-function replacements within the COP8SGx7 series or COP8SRx7 series. Verify if newer Texas Instruments equivalents exist that maintain binary compatibility. Ensure any substitute matches the 44-pin PQCC package dimensions and electrical specifications.