NXP Semiconductors 74HCT4514N,652

Overview

74HCT4514N,652 from Nexperia is a 4-to-16 line decoder/demultiplexer with input latches, designed for address decoding and digital multiplexing in 5 V logic systems. It features non-inverting active-HIGH outputs (Q0–Q15), latch enable (LE) and active-LOW enable (E), and operates with typical propagation delay of 26 ns (An to Qn at VCC = 5 V, CL = 15 pF). It is used in microprocessor address expansion and hexadecimal-to-BCD conversion circuits.

For engineers reviewing the 74HCT4514N,652 datasheet, 74HCT4514N,652 pinout, 74HCT4514N,652 application, or 74HCT4514N,652 equivalent, key selection criteria include latch-controlled output stability, TTL-compatible input thresholds, propagation delay consistency across temperature (−40 °C to +125 °C), and compatibility with standard 5 V CMOS logic families.

Technical Context

The 74HCT4514N,652 implements a binary-decoded 4-bit address latch architecture: four address inputs (A0–A3) feed into transparent latches enabled by LE; when LE transitions LOW, the last valid address is held, decoupling output state from subsequent address changes. The active-LOW enable (E) gates all 16 outputs independently of latch state.

Its HCT logic family ensures TTL-compatible input voltage thresholds (VIH = 2.0 V min, VIL = 0.8 V max at VCC = 4.5–5.5 V), while maintaining CMOS power efficiency. Output drive capability matches standard logic loads (IOH/ IOL = ±4 mA at VCC = 4.5 V), supporting direct interfacing with 74-series inputs without buffering.

Key Specifications

Pinout & Package

DIP-24 package (plastic dual in-line, 24-pin, 0.600" wide, JEDEC MS-001), lead finish SnPb, RoHS-compliant variant available.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar decoder/demultiplexer applications.

Compared with 74HC4514N,652 and SN74LS4514N, the 74HCT4514N,652 uniquely balances TTL-level input compatibility, integrated latching, and industrial temperature support-making it optimal for new 5 V embedded control designs requiring robust address management without external glue logic.

Availability

74HCT4514N,652 is available at Aetrix Electronics and suitable for microprocessor address decoding, hexadecimal-to-BCD conversion, and industrial control logic requiring stable component supply, long-term lifecycle assurance, and RoHS-compliant sourcing.

Supply support for 74HCT4514N,652 includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.

Manufacturer

Nexperia is a global leader in discrete, logic, and PowerMOS semiconductors, spun off from NXP's Standard Products division in 2017 and focused on automotive, industrial, computing, and consumer markets.

The 74HCT4514N,652 belongs to Nexperia's 74HCT logic family, engineered for seamless interoperability with legacy TTL systems while delivering CMOS efficiency-targeting cost-sensitive, high-reliability embedded control applications.

FAQ

What is the function of the LE pin on the 74HCT4514N,652?

The LE (Latch Enable) pin on the 74HCT4514N,652 controls whether the address inputs A0–A3 are transparently passed to the decoder or held in internal latches. When LE is HIGH, outputs follow A0–A3 in real time; when LE transitions LOW, the current address is captured and held, stabilizing Q0–Q15 regardless of subsequent A0–A3 changes. This behavior is essential for synchronizing decode operations with microprocessor bus cycles.

Does the 74HCT4514N,652 support operation at 3.3 V?

No, the 74HCT4514N,652 is specified only for VCC = 4.5 V to 5.5 V. Its TTL-compatible input thresholds (VIH ≥ 2.0 V, VIL ≤ 0.8 V) and internal circuitry are optimized for 5 V operation. For 3.3 V systems, consider the 74LVC4514 or similar LVC-family device-using the 74HCT4514N,652 at 3.3 V risks undefined logic states and unreliable latch behavior.

How many outputs can be active simultaneously on the 74HCT4514N,652?

Only one output (Q0–Q15) is active HIGH at any time on the 74HCT4514N,652, provided E is LOW and a valid 4-bit address (0–15) is latched. The device guarantees mutually exclusive outputs: no two Qn pins assert simultaneously under correct operating conditions, preventing bus contention in demultiplexing applications.

What is the maximum operating temperature for the 74HCT4514N,652?

The 74HCT4514N,652 is fully specified from −40 °C to +125 °C, meeting industrial and automotive under-hood requirements. This rating is validated across all AC and DC parameters-including propagation delays, setup/hold times, and output drive-ensuring reliable 74HCT4514N,652 performance in harsh thermal environments without derating.

Is the 74HCT4514N,652 pin-compatible with older 4000B-series decoders?

No, the 74HCT4514N,652 is pin-compatible with the "4514" devices in the 4000B series (e.g., CD4514BE) only in functional block diagram-not physical pinout. The 74HCT4514N,652 uses a 24-pin DIP layout with specific pin assignments (e.g., LE on pin 1, E on pin 23), whereas CD4514BE uses a 24-pin DIP with different pin functions (e.g., E on pin 1, LE absent). Direct PCB replacement is not possible.