Nexperia USA Inc. 74HC4515D,653

Overview

74HC4515D,653 from Nexperia is a 4-to-16 line inverting decoder/demultiplexer with input latches, featuring four binary address inputs (A0–A3), latch enable (LE) and active-low enable (E), 16 active-low outputs (Q0–Q15), and operation across −40 °C to +125 °C. It enables stable address decoding in microcontroller peripheral expansion and memory-mapped I/O systems.

For engineers reviewing the 74HC4515D,653 datasheet, 74HC4515D,653 pinout, 74HC4515D,653 application, or 74HC4515D,653 equivalent, key selection criteria include latch-controlled output stability, inverting output logic, SO24 package compatibility, and propagation delay ≤50 ns at 4.5 V.

Technical Context

The device integrates four independent D-type latches followed by a 4-to-16 binary decoder, allowing asynchronous capture of address data on LE HIGH and holding outputs steady when LE transitions LOW. Latch state is fully independent of E, which solely gates output drive.

Each output is actively driven LOW when selected (E = LOW and corresponding latch bits match), while all outputs float HIGH when E = HIGH. Input clamping diodes support interface to voltages exceeding VCC, enabling robust level-shifting with current-limiting resistors.

Key Specifications

Pinout & Package

74HC4515D,653 is housed in a plastic small outline package (SO24, SOT137-1) with 24 leads, 7.5 mm body width, and standard 1.27 mm pitch.

Key Features

Applications

Equivalent & Alternatives

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

Compared with 74HC4515D,653, the 74HCT4515D,653 offers broader input voltage compatibility but identical timing and latch behavior, while SN74HC154N sacrifices latch functionality for cost reduction in non-critical timing environments.

Availability

74HC4515D,653 is available at Aetrix Electronics and suitable for industrial control systems, embedded instrumentation, and programmable logic modules requiring stable component supply across extended temperature ranges.

Supply support for 74HC4515D,653 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 focused on high-volume, high-reliability logic, analog, and MOSFET solutions for industrial, automotive, and consumer markets.

The 74HC4515 belongs to Nexperia's 74HC logic family, designed specifically for robust, low-power, wide-supply-range decoding and demultiplexing in space-constrained embedded systems.

FAQ

What is the minimum pulse width required on the LE input to reliably capture address data?

The LE input requires a minimum HIGH pulse width of 13 ns at VCC = 6.0 V (15 ns at 4.5 V) to ensure valid data capture from A0–A3. This specification is verified across −40 °C to +125 °C and accounts for internal propagation delays through the latch enable path.

Can the 74HC4515D,653 be used with a 3.3 V supply while interfacing to 5 V logic inputs?

Yes - input clamping diodes allow safe interface to 5 V signals when series current-limiting resistors (≥1 kΩ) are used. At VCC = 3.3 V, VIH is 2.31 V min and VIL is 1.0 V max, providing adequate noise margin against 5 V logic HIGH/LOW levels.

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

E operates independently of the latch: it only controls output driver activation. When E = HIGH, all Q outputs are forced HIGH regardless of latch contents; when E = LOW, the latched address determines which single Q output goes LOW. Latch updates via LE are unaffected by E state.

Is thermal derating required for continuous operation at 125 °C ambient?

Yes - total power dissipation must be linearly derated above 70 °C at 8 mW/K. At 125 °C, maximum allowable Ptot drops to 456 mW (500 mW − 8 mW/K × 55 K). This limit applies under worst-case switching conditions with CL = 50 pF and full 16-output toggling.