Nexperia USA Inc. 74HCT4514D,652

Overview

74HCT4514D,652 from Nexperia is a 4-to-16 line decoder/demultiplexer with input latches, used for address decoding and hexadecimal-to-BCD conversion in digital logic systems. It features TTL-compatible inputs (VIH = 2.0 V min), active-HIGH latch enable (LE), active-LOW enable (E), 16 active-HIGH outputs (Q0–Q15), and operates across −40 °C to +125 °C at 4.5–5.5 V supply.

For engineers reviewing the 74HCT4514D,652 datasheet, 74HCT4514D,652 pinout, 74HCT4514D,652 application, or 74HCT4514D,652 equivalent, key selection criteria include latch-controlled output stability, TTL-level input compatibility, propagation delay (t_pd = 30 ns max at V_CC = 4.5 V), TSSOP24 package thermal performance, and ESD robustness (HBM > 2000 V).

Technical Context

This device integrates four address-input latches followed by a 4-bit binary decoder, enabling stable output selection independent of address input transitions once latched. The latch enable (LE) controls data capture timing, while the separate enable (E) gates output drive without affecting latch state.

It supports dual-mode operation: as a decoder (A0–A3 select one of 16 outputs when E is LOW), or as a demultiplexer (E serves as data input, A0–A3 as address lines). Input clamp diodes allow interface to voltages exceeding V_CC when used with current-limiting resistors.

Key Specifications

Pinout & Package

TSSOP24 package (SOT355-1): plastic thin shrink small outline, 24 leads, body width 4.4 mm, 1.1 mm max height, lead pitch 0.65 mm.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar 4-to-16 decoder/demultiplexer applications.

Compared with 74HC4514D,652 and SN74LS4514N, the 74HCT4514D,652 uniquely balances TTL input compatibility, low power (8 μA ICC), and industrial temperature support-making it optimal for new designs requiring robustness and efficiency without sacrificing legacy interface capability.

Availability

74HCT4514D,652 is available at Aetrix Electronics and suitable for industrial control systems, programmable logic interfaces, memory expansion modules, and LED display drivers requiring stable component supply across extended temperature ranges.

Supply support for 74HCT4514D,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 semiconductor expert delivering high-performance, reliable logic, analog, and MOSFET solutions for industrial, automotive, and consumer applications.

The 74HCT4514 belongs to Nexperia's high-reliability 74HCT logic family, engineered specifically for robust operation in noisy industrial environments with strict ESD and latch-up immunity requirements.

FAQ

Can 74HCT4514D,652 operate at 3.3 V supply?

No. The 74HCT4514 is specified only for 4.5 V to 5.5 V operation. At 3.3 V, input thresholds fall outside guaranteed switching levels, and output drive strength degrades significantly. For 3.3 V systems, use the 74LVC4514 or 74AUP4514 variants instead.

What happens to outputs when LE is HIGH and E is HIGH?

All 16 outputs (Q0–Q15) remain LOW regardless of A0–A3 state. The latch continues to track address inputs, but the enable input (E) disables output drivers entirely-this is the default inactive state for demultiplexer operation.

Is the TSSOP24 package RoHS compliant and lead-free?

Yes. The 74HCT4514D,652 in SOT355-1 (TSSOP24) packaging meets RoHS Directive 2011/65/EU and is fully lead-free, with matte tin (Sn) termination finish and halogen-free molding compound per Nexperia's product compliance documentation.

How does the latch prevent output glitches during address changes?

When LE transitions from HIGH to LOW, the instantaneous values of A0–A3 are captured and held in edge-triggered D-type latches. Subsequent changes on A0–A3 have no effect on decoded outputs until LE goes HIGH again-ensuring glitch-free transitions during bus arbitration or multi-cycle addressing.