HEF4514BT,653

Overview

The HEF4514BT,653 is a 1-of-16 decoder/demultiplexer from the HEF4000B logic family. It features four binary weighted address inputs (A0 to A3), a latch enable input (EL), and an active LOW enable input (E). The device provides 16 mutually exclusive active HIGH outputs (O0 to O15). When EL is HIGH, the selected output is determined by the data on An. When EL goes LOW, the last data present at An are stored in the latches and the outputs remain stable. When E is LOW, the selected output, determined by the contents of the latch, is HIGH. At E HIGH, all outputs are LOW. The enable input (E) does not affect the state of the latch.

Feature Summary

• Includes input latches that store address data when the latch enable signal transitions low, maintaining stable outputs independent of subsequent address changes.
• Features an active LOW enable input that controls the output state without affecting the internal latch storage condition.
• Provides 16 mutually exclusive active HIGH outputs for precise selection or demultiplexing tasks.

Applications

• Digital multiplexing
• Address decoding
• Hexadecimal/BCD decoding

Procurement Notes

Verify the manufacturer designation, as datasheets may reference Philips Semiconductors or Nexperia due to corporate history. Confirm the package type corresponds to the BT suffix, which indicates a plastic SO package. Ensure compatibility with the HEF4000B logic family specifications regarding voltage ranges and load capacitance requirements for your specific application environment.

Selection Notes

Select this component when a 1-of-16 decoding function with integrated address latching is required. It is suitable for applications needing stable output states despite changing address inputs. Consider the AC characteristics, such as propagation delays and power dissipation formulas, to ensure timing and thermal performance meet system constraints under the intended supply voltage and load conditions.

Part Context

The HEF4514B belongs to the HEF4000B MSI logic family, utilizing LOCMOS technology. This family is characterized by fully static operation and standardized symmetric output characteristics. The device is designed for industrial applications and complies with relevant JEDEC standards, ensuring reliability in various digital logic environments requiring robust CMOS performance.

Replacement Considerations

Check for equivalents within the HEF4000B family or other compatible 1-of-16 decoders with latches. Verify pinout compatibility and electrical parameters such as supply voltage range and output drive capability before substitution.