Nexperia USA Inc. 74HC4515D,652

Overview

74HC4515D,652 from Nexperia is a 4-to-16 line inverting decoder/demultiplexer with input latches, designed for address decoding and digital multiplexing in industrial logic systems. It features four binary-weighted address inputs (A0–A3), latch enable (LE) and active-low enable (E), 16 active-low outputs (Q0–Q15), CMOS input levels, and operates across −40 °C to +125 °C.

For engineers reviewing the 74HC4515D,652 datasheet, 74HC4515D,652 pinout, 74HC4515D,652 application, or 74HC4515D,652 equivalent, key selection criteria include latch-controlled output stability, inverting demux behavior, SO24 package compatibility, propagation delay at 4.5 V (29–50 ns), and JEDEC-compliant operation over extended temperature range.

Technical Context

The 74HC4515D,652 implements a two-stage architecture: four transparent D-type latches (one per address bit) followed by a 4-to-16 binary decoder. Latch enable (LE) controls data capture timing-HIGH enables real-time address tracking, LOW freezes latched state independently of E.

Enable input E operates asynchronously and exclusively controls output drive: when LOW, the decoded output corresponding to latched address goes LOW; all outputs remain HIGH when E is HIGH. Inputs include clamp diodes supporting interface to voltages exceeding VCC via current-limiting resistors.

Key Specifications

Pinout & Package

74HC4515D,652 is housed in a plastic small outline package (SO24, SOT137-1) with 24 leads, 7.5 mm body width, and gull-wing surface-mount terminals.

Key Features

Applications

Equivalent & Alternatives

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

Compared with 74HC4515D,652, the 74HCT4515D,653 offers TTL input compatibility at the cost of reduced noise margin in mixed-voltage systems, while the SN74LS4515N sacrifices latch control, power efficiency, and temperature range for legacy TTL integration.

Availability

74HC4515D,652 is available at Aetrix Electronics and suitable for industrial control systems, automated test equipment, and embedded instrumentation requiring stable component supply, long-term lifecycle assurance, and extended temperature performance.

Supply support for 74HC4515D,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 specializing in high-performance, energy-efficient logic, analog, and discrete components for automotive, industrial, and consumer markets.

The 74HC4515 belongs to Nexperia's 74HC logic family, engineered for low-power, high-noise-immunity digital interfacing in demanding industrial environments where latch-controlled decoding is critical.

FAQ

What is the function of the latch enable (LE) input?

The LE input controls data capture timing: when HIGH, A0–A3 pass through transparently to the latches; when it falls LOW, the current address values are stored and held regardless of subsequent address changes. This decouples address sampling from output enable timing, preventing glitches during dynamic addressing.

Can 74HC4515D,652 operate at 3.3 V supply?

Yes - the device is fully specified from 2.0 V to 6.0 V, including 3.3 V operation. At VCC = 3.3 V, VIH is 2.31 V min and VOL is ≤0.26 V at 4 mA sink, ensuring compatibility with standard 3.3 V CMOS interfaces and adequate noise margins.

How does the enable (E) input interact with latched data?

E operates independently of the latch state: when LOW, the output corresponding to the currently latched A0–A3 value goes LOW; when HIGH, all 16 outputs remain HIGH regardless of latch contents. E does not affect latch storage - only output drive state.

Is there a non-latching version of this decoder?

Yes - the 74HC154 is a functionally equivalent 4-to-16 decoder without input latches. It uses active-LOW enable (E1, E2) and has identical output behavior but lacks LE and real-time address capture capability, making it unsuitable for applications requiring address hold during bus contention.