CD54HCT7046AF

Overview

The CD54HCT7046AF is a Phase Locked Loop (PLL) integrated circuit manufactured by Harris Corporation. It utilizes CMOS technology and operates within an extended temperature range of -55°C to 125°C, designated for automotive or military-grade applications. The device functions as a single-channel PLL with a maximum operating frequency of 38 MHz. It requires a supply voltage between 4.5 V and 5.5 V, typically centered at 5 V. The component is supplied in a ceramic dual-in-line package (CDIP-16), featuring no leads on the surface mount variant but standard through-hole pins for the DIP configuration.

Feature Summary

• Integrated phase locked loop circuitry for frequency synthesis and clock recovery
• High-speed CMOS construction ensuring low power consumption and noise immunity
• Extended industrial and military temperature rating for harsh environment reliability

Applications

• Frequency synthesizers in communication systems
• Clock recovery circuits in data transmission links
• Motor speed control loops

Procurement Notes

Verify the specific suffix 'F' against the manufacturer's datasheet to confirm the exact package style and material composition, as suffixes often denote ceramic versus plastic variations. Ensure the supplier provides traceability documentation suitable for aerospace or defense contracts given the 54-series designation. Confirm RoHS compliance status if required for modern assembly lines, noting that older Harris parts may not meet current environmental directives.

Selection Notes

Select this component when a high-reliability, wide-temperature PLL is required for critical systems. Compare the 38 MHz limit against system requirements. Verify pin compatibility with existing PCB footprints, specifically checking the CDIP-16 dimensions. Consider the CD74HCT7046 variants if commercial temperature ranges suffice and cost reduction is necessary.

Part Context

This part belongs to the 54-series logic family, which denotes higher reliability standards compared to the commercial 74-series. It is functionally similar to the CD74HCT7046 but offers broader thermal tolerance. Harris Corporation was a primary producer before its semiconductor assets were acquired by other entities, making original markings distinct from current Texas Instruments equivalents.

Replacement Considerations

The CD74HCT7046AF serves as a commercial-grade functional substitute if temperature constraints allow. Check pinout compatibility carefully. No direct drop-in replacements exist for the full military specification without verifying qualification documents.