Nexperia USA Inc. 74HC4514DB,112

Overview

74HC4514DB,112 from Nexperia is a 4-to-16 line decoder/demultiplexer with input latches, implementing binary-to-16-line decoding and demux functions in a single TSSOP24 package. It features four address inputs (A0–A3), latch enable (LE) and enable (E), 16 active-HIGH outputs (Q0–Q15), 2.0–6.0 V supply range, and operates from −40 °C to +125 °C - used for hexadecimal address decoding in industrial control backplanes.

For engineers reviewing the 74HC4514DB,112 datasheet, 74HC4514DB,112 pinout, 74HC4514DB,112 application, or 74HC4514DB,112 equivalent, key selection considerations include latch-controlled output stability, TTL-compatible 74HCT variant availability, propagation delay under 46 ns at 4.5 V, and TSSOP24 thermal derating above 110 °C.

Technical Context

The device integrates four independent D-type latches followed by a 4-to-16 binary decoder, enabling asynchronous address capture and synchronous output selection. Latch enable (LE) controls data sampling on A0–A3, while enable (E) independently gates output drive - allowing E to serve as data input in demux mode.

Input clamping diodes permit interface to voltages exceeding VCC using current-limiting resistors. The 74HC variant uses CMOS-level inputs; the 74HCT variant supports TTL-level compatibility with VIH = 2.0 V min at VCC = 4.5–5.5 V, ensuring interoperability with legacy logic families.

Key Specifications

Pinout & Package

TSSOP24 (SOT355-1) package: plastic thin shrink small outline, 24 leads, 4.4 mm body width, 0.65 mm lead pitch, 1.1 mm max height - optimized for high-density PCB layouts and automated SMT assembly.

Key Features

Applications

Equivalent & Alternatives

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

Compared with 74HC4514DB,112, the 74HC4515PW,118 offers identical timing and latch behavior but inverted outputs - simplifying designs needing active-LOW enables, while SN74LS4514N trades power efficiency and voltage flexibility for TTL compatibility in legacy 5 V environments.

Availability

74HC4514DB,112 is available at Aetrix Electronics and suitable for industrial control backplanes, embedded HMI interfaces, and programmable logic I/O expansion requiring stable component supply across extended temperature ranges.

Supply support for 74HC4514DB,112 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, and energy-efficient logic, analog, and discrete components for automotive, industrial, and consumer applications.

The 74HC/HCT logic family targets robust, low-power digital interfacing - designed specifically for noise-immune signal routing, address decoding, and data path control in harsh industrial environments.

FAQ

What is the maximum clock frequency supported by the 74HC4514DB,112 for address decoding?

The device does not operate on a clock signal - it is combinational logic with latched inputs. Maximum usable address update rate is determined by propagation delay (27 ns typ @ 4.5 V) and setup/hold times (18 ns su / 9 ns h). For reliable operation, address changes must be stable ≥18 ns before LE falling edge and held ≥9 ns after, supporting effective rates up to ~25 MHz in latch-controlled systems.

Can the 74HC4514DB,112 drive LEDs directly without current-limiting resistors?

No. While outputs source/sink ±4.0 mA at VCC = 4.5 V, LED forward voltage and desired brightness require external series resistors. For example, driving a 2.1 V red LED at 5 mA from 5 V requires (5 − 2.1)/0.005 = 580 Ω. Omitting resistors risks exceeding absolute max output current (±25 mA) and damaging the IC or LED.

How does the latch enable (LE) interact with the enable (E) input during operation?

LE and E operate independently: LE controls latching of A0–A3 into internal registers, while E gates output drivers. When LE is HIGH, outputs reflect current A0–A3; when LE goes LOW, outputs freeze at last latched value regardless of subsequent A0–A3 changes. E then determines whether that frozen value appears on Qn (E = LOW → Qn = HIGH for selected line) or forces all Qn LOW (E = HIGH).

Is the 74HC4514DB,112 RoHS compliant and halogen-free?

Yes. Per Nexperia's product compliance documentation, 74HC4514DB,112 (TSSOP24, SOT355-1) meets RoHS Directive 2011/65/EU and is certified halogen-free (IEC 61249-2-21), with bromine < 900 ppm and chlorine < 900 ppm. Full compliance reports are available via Nexperia's Quality Portal using the device's full orderable part number.