CD74HCT4515EN

Overview

The CD74HCT4515EN is a high-speed silicon-gate device from the HCT logic series, manufactured by Texas Instruments. It integrates a 4-bit strobed latch and a 4-line to 16-line decoder with inverted outputs. The component operates within a supply voltage range of 4.5 V to 5.5 V and supports an extended operating temperature range from -55°C to +125°C. It features direct LSTTL input logic compatibility with a maximum low-level input voltage of 0.8 V and a minimum high-level input voltage of 2 V. The device utilizes a 24-pin Plastic Dual-In-Line (PDIP) package.

Feature Summary

• Integrates a 4-bit strobed latch and a 4-line to 16-line decoder with inverted outputs
• Provides direct LSTTL input logic compatibility for seamless interface with standard TTL systems
• Enables demultiplexing functionality by utilizing the enable input as data and select inputs as addresses
• Supports cascading operations where the enable input functions as a chip select signal

Applications

• Demultiplexing applications using enable input as data and select inputs as addresses
• Cascaded decoding systems requiring chip select functionality via the enable input
• Systems requiring direct interface with LSTTL logic families

Procurement Notes

Verify that the specific part number matches the required PDIP-24 package configuration and HCT logic family specifications. Confirm compliance with the specified operating temperature range of -55°C to +125°C and the 4.5 V to 5.5 V supply voltage requirements. Ensure the component meets the necessary electrical characteristics for LSTTL compatibility before integration into the design.

Selection Notes

Select this component when a 4-to-16 line decoder with input latching capability is required in a through-hole application. The HCT series ensures compatibility with LSTTL logic levels, making it suitable for mixed-logic environments. Consider the PDIP-24 package dimensions and thermal impedance if heat dissipation is a critical factor in the system design.

Part Context

This device belongs to the CD74HCT4514/CD74HCT4515 family of decoders/demultiplexers. The CD74HCT4514 variant provides non-inverted outputs, whereas the CD74HCT4515 provides inverted outputs. Both share identical internal architecture regarding the 4-bit strobed latch and 4-line to 16-line decoding structure.

Replacement Considerations

The CD74HCT4514E serves as a functional substitute within the same family, differing only in output polarity (non-inverted versus inverted). Verify pinout compatibility and logical inversion requirements when considering cross-referencing between these variants.