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Home > Products > Integrated Circuits (ICs) > Logic > Signal Switches, Multiplexers, Decoders

NXP Semiconductors 74HCT4515D,652

Name: 74HCT4515D,652
Brand: NXP Semiconductors
SKU: 74HCT4515D,652
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: 74HCT4515D,652

Manufacturer:: NXP Semiconductors

Category:: Signal Switches, Multiplexers, Decoders

Package:: 24-SOIC (0.295", 7.50mm Width)

Datasheet:: 74HCT4515D,652.pdf

Description:: IC DECODER/DEMUX 1X4:16 24SO

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Product details

Overview

74HCT4515D,652 from Nexperia is a 4-to-16 line inverting decoder/demultiplexer with input latches, operating at 4.5 V supply, featuring 26 ns typical propagation delay (A_n to Q_n), 16 active-low mutually exclusive outputs, and latch enable (LE) and active-low enable (E) control inputs. It is used in address decoding for memory-mapped peripherals in industrial microcontroller systems.

For engineers reviewing the 74HCT4515D,652 datasheet, 74HCT4515D,652 pinout, 74HCT4515D,652 application, or 74HCT4515D,652 equivalent, key selection criteria include latch-controlled output stability, TTL-compatible input thresholds, inverting output logic, and SO16 package compatibility with legacy 74-series layouts.

Technical Context

The 74HCT4515D,652 implements a synchronous 4-bit binary address decoder with transparent latching: when LE is HIGH, outputs follow A0–A3 in real time; when LE transitions LOW, the current address is captured and held. The E input enables or disables all outputs independently of latch state.

It uses Si-gate CMOS technology with TTL-compatible input thresholds (VI = GND to 3 V), supports standard-output drive capability, and complies with JEDEC Standard No. 7A. All 16 outputs are active LOW and mutually exclusive - only one output is LOW per valid address/enable combination.

Key Specifications

Parameter	Value and Actual Design Meaning
Function	4-to-16 inverting decoder/demultiplexer with input latches
V_CC Range	4.5 V to 5.5 V - ensures compatibility with 5 V TTL and mixed-voltage industrial logic systems
t_PHL/t_PLH (A_n→Q_n)	26 ns typical at V_CC = 5 V, CL = 15 pF - defines maximum clock/address update rate in synchronous decode paths
Output Logic	Inverting, active-LOW Q0–Q15 - directly drives common-cathode LED arrays or enables active-LOW chip select lines
Input Compatibility	TTL-level inputs (V_IH = 2.0 V min, V_IL = 0.8 V max) - interfaces seamlessly with legacy 74LS and microcontroller GPIO without level shifters
ICC Category	MSI (Medium-Scale Integration) - indicates standardized power and layout expectations for PCB routing and thermal design

Pinout & Package

74HCT4515D,652 is housed in a 24-pin SOIC (Small Outline Integrated Circuit) package with 300 mil body width and standard 1.27 mm pitch, compliant with JEDEC MS-013AC and "74HC/HCT Logic Package Outlines".

Pin/Terminal	Circuit Role	Design Meaning
1	LE	Latch Enable (active HIGH) - controls transparency vs. hold mode; rising edge captures A0–A3, falling edge freezes output
2,3,21,22	A0–A3	Binary-weighted address inputs - define decoded output index (0–15); sampled only when LE = HIGH
11,9,10,8,7,6,5,4,18,17,20,19,14,13,16,15	Q0–Q15	Inverting outputs - exactly one is LOW per valid E + address combination; all HIGH when E = HIGH
12	GND	Ground reference - return path for all internal logic and output currents
23	E	Enable input (active LOW) - globally enables/disables output decoding independent of latch state
24	V_CC	Positive supply - powers internal logic and provides output high-level voltage reference

Key Features

Feature	Design Value
Latched address storage	Enables stable output during address bus contention or asynchronous updates - critical for reliable peripheral selection in shared-bus systems
Active-LOW mutually exclusive outputs	Eliminates need for external OR/NOR logic when driving multiple active-LOW chip selects or reset lines
TTL-compatible input thresholds	Direct interface with 74LS, 74F, and most MCU GPIO without pull-ups or level translators
SO16 footprint compatibility	Drop-in replacement for legacy 74LS4515 and 74HC4515 in existing SOIC-24 layouts

Applications

Memory Address Decoding	Peripheral Chip Select Generation
Use Scenario: Decoding 4-bit address bus to select one of 16 memory-mapped I/O registers in an 8-bit microcontroller system. IC Role / Device Role / Timing Role: Address decoder with latch stabilization - holds register selection during bus arbitration cycles. Use Value: Prevents spurious register access during address glitches by freezing A0–A3 via LE control before E assertion.	Use Scenario: Generating individual /CS signals for up to 16 SPI or parallel peripheral devices on a shared data bus. IC Role / Device Role / Timing Role: Demultiplexer with active-LOW outputs - each Q_n directly enables one peripheral's chip select input. Use Value: Reduces MCU GPIO usage by 12 pins versus discrete gate-based decoding; eliminates timing skew across /CS lines.
Hexadecimal Display Driver Interface	Industrial Control Signal Routing
Use Scenario: Driving 16-segment common-cathode displays or LED banks where each segment corresponds to a unique hex digit (0–F). IC Role / Device Role / Timing Role: Inverting decoder - Q_n = LOW activates cathode segments; A0–A3 map to BCD/hex input. Use Value: Direct drive capability avoids external inverters; latch allows static display updates without continuous address bus activity.	Use Scenario: Routing control signals (e.g., valve actuation, sensor enable, alarm triggers) in programmable logic controllers with fixed I/O mapping. IC Role / Device Role / Timing Role: Latched demultiplexer - E synchronizes signal routing with PLC scan cycle; LE captures command address once per cycle. Use Value: Ensures deterministic signal routing even under variable scan timing; prevents partial activation during address transitions.

Memory Address Decoding

Peripheral Chip Select Generation

Use Scenario: Decoding 4-bit address bus to select one of 16 memory-mapped I/O registers in an 8-bit microcontroller system.

IC Role / Device Role / Timing Role: Address decoder with latch stabilization - holds register selection during bus arbitration cycles.

Use Value: Prevents spurious register access during address glitches by freezing A0–A3 via LE control before E assertion.

Use Scenario: Generating individual /CS signals for up to 16 SPI or parallel peripheral devices on a shared data bus.

IC Role / Device Role / Timing Role: Demultiplexer with active-LOW outputs - each Q_n directly enables one peripheral's chip select input.

Use Value: Reduces MCU GPIO usage by 12 pins versus discrete gate-based decoding; eliminates timing skew across /CS lines.

Hexadecimal Display Driver Interface

Industrial Control Signal Routing

Use Scenario: Driving 16-segment common-cathode displays or LED banks where each segment corresponds to a unique hex digit (0–F).

IC Role / Device Role / Timing Role: Inverting decoder - Q_n = LOW activates cathode segments; A0–A3 map to BCD/hex input.

Use Value: Direct drive capability avoids external inverters; latch allows static display updates without continuous address bus activity.

Use Scenario: Routing control signals (e.g., valve actuation, sensor enable, alarm triggers) in programmable logic controllers with fixed I/O mapping.

IC Role / Device Role / Timing Role: Latched demultiplexer - E synchronizes signal routing with PLC scan cycle; LE captures command address once per cycle.

Use Value: Ensures deterministic signal routing even under variable scan timing; prevents partial activation during address transitions.

Equivalent & Alternatives

The following parts are listed as comparable options for similar decoder/demultiplexer applications.

Alternative Part	Technical Difference	Application Difference	Selection Advice
74HC4515D,653	CMOS-input version (V_IH = 3.15 V min); higher propagation delay (25 ns typical at 5 V); wider V_CC range (2–6 V)	Suitable for mixed-voltage systems (e.g., 3.3 V control + 5 V peripherals); less tolerant of noisy 5 V TTL inputs	Select when interfacing with 3.3 V FPGAs or low-power MCUs; avoid in legacy 5 V TTL environments
SN74LS4515N	Bipolar TTL technology; faster t_PLH (15 ns typical); higher ICC (24 mA typical); no latch enable function	Requires external latch (e.g., 74LS373) for address hold; incompatible with CMOS input drive strength	Choose only for drop-in replacement in vintage TTL designs where latch functionality is implemented externally

Compared with 74HCT4515D,652, the 74HC4515D,653 offers broader supply flexibility but lacks TTL input compatibility, while SN74LS4515N delivers raw speed at the cost of power and integration - making the 74HCT4515D,652 optimal for modern 5 V industrial systems requiring latch+TTL compatibility in one device.

Availability

74HCT4515D,652 is available at Aetrix Electronics and suitable for memory address decoding, peripheral chip select generation, hexadecimal display interfacing, and industrial control signal routing requiring stable component supply and long-term industrial lifecycle support.

Supply support for 74HCT4515D,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 leader in discrete, logic, and PowerMOS semiconductors, formed in 2017 from the former NXP Standard Products business, with focus on automotive, industrial, computing, consumer, and wearable markets.

The 74HCT4515D,652 belongs to Nexperia's 74HCT logic family - designed specifically for robust 5 V TTL-compatible digital interfacing in industrial and embedded systems where noise immunity, latch stability, and legacy compatibility are critical.

FAQ

What is the supply voltage range for the 74HCT4515D,652?

The 74HCT4515D,652 operates over a supply voltage range of 4.5 V to 5.5 V. This narrow range ensures strict TTL input compatibility and predictable output drive strength. Operation outside this range may cause undefined logic states or excessive ICC. The 74HCT4515D,652 is not rated for 3.3 V operation - use the 74HC4515D,653 instead for dual-supply systems.

How does the latch enable (LE) pin function in the 74HCT4515D,652?

The LE pin on the 74HCT4515D,652 controls whether the internal address latches are transparent or holding. When LE is HIGH, Q0–Q15 follow A0–A3 in real time. When LE goes LOW, the current A0–A3 values are latched and outputs remain stable regardless of subsequent address changes. The 74HCT4515D,652 requires no external clock - latching is edge-triggered on LE's falling edge.

Are the outputs of the 74HCT4515D,652 truly mutually exclusive?

Yes - the 74HCT4515D,652 guarantees mutual exclusivity: only one of Q0–Q15 is LOW for any valid combination of A0–A3 and E = LOW. When E = HIGH, all outputs are HIGH. This behavior is verified across temperature (−40 °C to +125 °C) and supply (4.5–5.5 V), and is fundamental to its use in chip select and decoder applications where output contention must be avoided.

Can the 74HCT4515D,652 be used as a demultiplexer?

Yes - the 74HCT4515D,652 functions as a 1-to-16 demultiplexer when E is used as the data input and A0–A3 as address lines. With LE held HIGH, incoming data on E appears inverted on the selected Q_n output. The latch feature allows data to be held steady even if E toggles after selection - a capability not present in basic demux ICs. This dual-mode operation is explicitly documented in the 74HCT4515D,652 functional description.

What package type is used for the 74HCT4515D,652?

The 74HCT4515D,652 is supplied in a 24-pin SOIC (Small Outline Integrated Circuit) package designated as "SO16" in Nexperia documentation, with 300 mil body width, 1.27 mm lead pitch, and JEDEC MS-013AC outline compliance. This package is pin-identical to industry-standard SOIC-24 footprints and supports both automated SMT assembly and manual prototyping with standard breakout boards.

74HCT4515D,652 Specifications

Product attributes: Attribute value

Manufacturer:: NXP Semiconductors

Series:: 74HCT

Package/Case:: 24-SOIC (0.295", 7.50mm Width)

Packaging:: Tube

Product Status:: Obsolete

Type:: Decoder/Demultiplexer

Circuit:: 1 x 4:16

Independent Circuits:: 1

Current - Output High, Low:: 4mA, 4mA

Voltage Supply Source:: Single Supply

Voltage - Supply:: 4.5V ~ 5.5V

Operating Temperature:: -40°C ~ 125°C

Grade:: -

Qualification:: -

Mounting Type:: Surface Mount

Supplier Device Package:: 24-SO

74HCT4515D,652 FAQ

1.How can I place an order for 74HCT4515D,652 through Aetrix?

Please submit a Request for Quotation (RFQ) for 74HCT4515D,652 on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.

2.Are the price and stock information for 74HCT4515D,652 reliable?

The price and inventory of 74HCT4515D,652 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 74HCT4515D,652 is usually 5 days.

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Once your 74HCT4515D,652 order is processed, you will receive an email with the shipment details and tracking number.

Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.

5.How can I obtain technical support or documentation for 74HCT4515D,652?

For technical support, including 74HCT4515D,652 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 74HCT4515D,652 requirements.

6.How does Aetrix verify that 74HCT4515D,652 is sourced from the original manufacturer or authorized distributors?

All 74HCT4515D,652 products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that 74HCT4515D,652 meets industry standards.

7.What is the process for return or replacement of 74HCT4515D,652?

All 74HCT4515D,652 units undergo pre-shipment inspection (PSI). If there is an issue with 74HCT4515D,652, returns or replacements are accepted under the following conditions:

1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.

2.The issue is reported within 90 days of delivery.

3.The 74HCT4515D,652 part is unused and in its original packaging.

Return procedure for 74HCT4515D,652:

1.Submit a request within 90 days.

2.Obtain a Return Material Authorization (RMA) from Aetrix.

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