Nexperia USA Inc. 74HCT4514PW,112

Overview

74HCT4514PW,112 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), 16 active-HIGH outputs (Q0–Q15), latch enable (LE) and enable (E) control, and operates across −40 °C to +125 °C at 4.5–5.5 V supply.

For engineers reviewing the 74HCT4514PW,112 datasheet, 74HCT4514PW,112 pinout, 74HCT4514PW,112 application, or 74HCT4514PW,112 equivalent, key selection criteria include latch-controlled output stability, TTL-level input compatibility, propagation delay (t_pd ≤ 83 ns @ V_CC = 4.5 V), TSSOP24 package footprint, and industrial temperature range support.

Technical Context

The device integrates four address input latches (A0–A3), a 4-bit binary decoder, and 16 independent output drivers. Latch enable (LE) controls data capture timing: when LE transitions LOW, the current A0–A3 values are stored and held regardless of subsequent address changes.

Enable input E operates asynchronously and independently of the latch - it gates output activation (active LOW), allowing demultiplexing where E serves as the data input and A0–A3 as address lines. Input clamp diodes permit safe interfacing to voltages exceeding V_CC when used with current-limiting resistors.

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 - compatible with standard surface-mount reflow profiles and automated optical inspection.

Key Features

Applications

Equivalent & Alternatives

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

Compared with 74HC4514PW,118, the 74HCT4514PW,112 offers guaranteed TTL compatibility at the cost of slightly higher ICC; versus SN74LS4514N, it adds essential latch control and modern TSSOP packaging but trades off raw speed for robustness and flexibility.

Availability

74HCT4514PW,112 is available at Aetrix Electronics and suitable for memory address decoding, hexadecimal display driving, programmable logic expansion, and industrial I/O multiplexing requiring stable component supply across extended temperature ranges.

Supply support for 74HCT4514PW,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 logic, analog, and MOSFET solutions optimized for efficiency, reliability, and miniaturization in industrial, automotive, and consumer applications.

The 74HCT4514 belongs to Nexperia's high-speed TTL-compatible logic family, designed specifically for seamless integration into mixed-voltage systems where legacy TTL interfacing and latch-controlled timing stability are mandatory.

FAQ

What is the maximum clock frequency supported for address updates?

The 74HCT4514PW,112 does not operate on a clock; address updates are asynchronous. However, minimum LE pulse width is 16 ns (HIGH) and 18 ns (LOW) at V_CC = 4.5 V, enabling reliable latching up to ~30 MHz effective address change rate. Propagation delays (≤83 ns) define the upper bound for stable output settling between updates.

Can E and LE be driven by the same control signal?

No - E is active LOW and controls output enable, while LE is active HIGH and controls latch capture. Driving them together would prevent latching: when LE = HIGH (latch transparent), E = LOW enables outputs, but when LE falls to capture data, E would also go HIGH and disable all outputs. Separate timing control is required for correct operation.

Is the TSSOP24 package RoHS-compliant and lead-free?

Yes - the 74HCT4514PW,112 in SOT355-1 (TSSOP24) packaging meets RoHS Directive 2011/65/EU and is fully lead-free, with matte tin termination finish and halogen-free molding compound, certified per Nexperia's Declaration of Conformity (Doc ID: ROHS-PW).

How does the latch behavior affect timing in a microcontroller interface?

When interfacing with an MCU, the latch allows A0–A3 to be updated on the data bus while LE remains HIGH; then LE is pulsed LOW to freeze the address before asserting E. This decouples address setup time from enable timing, eliminating race conditions and permitting slower GPIO writes without output glitches - critical for resource-constrained MCUs.