HEF4515BT,653

Overview

The HEF4515BT,653 is a dual 4-bit address decoder integrated circuit belonging to the HE4000B logic family. Manufactured by Nexperia (formerly NXP), it operates within a supply voltage range of 3V to 15V and utilizes a surface-mount SOIC-16 package. The device features two independent decoders, each providing sixteen active-low outputs selected by four binary address inputs. It includes dedicated chip enable inputs for both channels, allowing precise control over output activation states in digital addressing applications.

Feature Summary

• Dual independent 4-to-16 line decoding capability
• Active-low output configuration for direct interface compatibility
• Dedicated chip enable inputs for individual channel control

Applications

• Memory address decoding in embedded systems
• Peripheral selection circuits in microcontroller interfaces
• I/O port expansion logic design

Procurement Notes

Verify the manufacturer designation carefully, as the component was originally part of the NXP portfolio before transitioning to Nexperia. Confirm that the specific suffix

Selection Notes

Select this component when a compact solution for dual 4-bit decoding is required in space-constrained designs. Ensure the operating voltage aligns with the system's power rails, as the device supports a wide range from 3V to 15V. Consider the SOIC-16 footprint during PCB layout planning to ensure adequate clearance for the surface-mount package dimensions.

Part Context

This device is part of the widely adopted HE4000B CMOS logic series, known for high noise immunity and low power consumption. It serves as a standard building block for digital logic systems requiring address translation. The transition from NXP to Nexperia represents a corporate restructuring rather than a change in the fundamental technology or specifications of the logic family.

Replacement Considerations

Compatible substitutes include the HEF4515BP,652 for through-hole mounting requirements. Other equivalents within the same logic family may be considered if pin compatibility and electrical characteristics match the original design constraints.