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Texas Instruments CD74HC4514M
- Part No.:
- CD74HC4514M
- Manufacturer:
- Texas Instruments
- Category:
- Signal Switches, Multiplexers, Decoders
- Package:
- 24-SOIC (0.295", 7.50mm Width)
- Datasheet:
-
CD74HC4514M.pdf
- Description:
- IC DECODER/DEMUX 1X4:16 24SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:4,589
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Product details
Overview
CD74HC4514M from Texas Instruments is a high-speed CMOS 4-to-16 line decoder/demultiplexer with input latches, operating from 2V to 6V supply, featuring 16 active-high outputs, -55°C to +125°C temperature range, and propagation delay of 47 ns (typ) at VCC = 6V. It serves as a binary-to-1-of-16 decoder or 1-to-16 demultiplexer in address decoding and data routing applications for industrial control systems.
For engineers reviewing the CD74HC4514M datasheet, CD74HC4514M pinout, CD74HC4514M application, or CD74HC4514M equivalent, key selection considerations include latch-enable timing (tSU = 21 ns min at 6V), E-input demux functionality, SOIC-24 thermal resistance (θJA = 46°C/W), and compatibility with LSTTL loads (10 units).
Technical Context
The CD74HC4514M integrates a 4-bit strobed latch and a 4-to-16-line decoder in a single SOIC-24 package. Its latch enable (LE) controls transparent vs. latched operation, while the enable input (E) acts as both output enable and data input for demultiplexing - enabling cascading via chip-select functionality.
It implements HC-type logic with high noise immunity (NIL/NIH = 30% of VCC at 5V), balanced transition times, and significant power reduction versus LSTTL. Output drive capability is specified at 10 LSTTL loads under full temperature range (-55°C to +125°C).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage Range | 2V to 6V - supports mixed-voltage system interfacing and battery-powered operation down to 2V. |
| Operating Temperature | -55°C to +125°C - qualified for extended industrial, aerospace, and automotive under-hood environments. |
| Propagation Delay (E→Y) | 30 ns (max at 6V, -55°C to +125°C) - enables reliable timing in high-speed address decode paths. |
| Output Drive | 10 LSTTL loads - sufficient to directly drive legacy TTL inputs without buffering in mixed-logic systems. |
| Input Leakage Current | ±1 µA (max at -55°C to +125°C) - ensures stable logic levels in low-power standby modes. |
| Quiescent ICC | 160 µA (max at -55°C to +125°C) - supports ultra-low static power in always-on control subsystems. |
| Logic Family | High-Speed CMOS (HC) - provides LSTTL-compatible speed with CMOS power efficiency and noise margin. |
Pinout & Package
CD74HC4514M is housed in a 24-pin SOIC (DW) package with standard JEDEC MS-013AC dimensions, 1.27 mm pitch, and moisture sensitivity level 1 (260°C peak reflow). The package supports surface-mount assembly and offers θJA = 46°C/W for thermal management in dense PCB layouts.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | LE (Latch Enable) | Active-high control: when high, outputs follow A0–A3; when low, outputs hold last state (latched). |
| 2–5 | A0–A3 (Address Inputs) | 4-bit binary select lines determining which of Y0–Y15 is activated when E = low and LE = high. |
| 6–11, 13–14, 16–23 | Y0–Y15 (Outputs) | 16 active-high decoded/demuxed outputs; only one asserted per valid A3:A0 combination when E = low. |
| 12 | GND | Ground reference for all internal circuitry and I/O; requires low-impedance connection to minimize noise coupling. |
| 24 | VCC | Positive supply rail (2V–6V); decoupling capacitor (0.1 µF ceramic) recommended adjacent to pin. |
| 15 | E (Enable) | Active-low output enable; also functions as data input for demultiplexing mode when used with A0–A3 as address bus. |
Key Features
| Feature | Design Value |
|---|---|
| Binary-to-1-of-16 decoding | Directly replaces discrete gate arrays in memory and peripheral address decoding, reducing component count by >80%. |
| Strobed input latching | LE-controlled transparent/latched behavior enables synchronization with system clocks or handshaking signals. |
| Dual-mode operation | Configurable as decoder (E = GND) or 1-to-16 demultiplexer (E = data, A0–A3 = address), increasing design reuse. |
| Wide supply voltage range | 2V–6V operation allows interoperability across 3.3V microcontrollers and 5V legacy peripherals without level shifters. |
| High noise immunity | 30% VCC noise margin at 5V ensures robust operation in electrically noisy industrial environments. |
Applications
| Industrial PLC I/O Expansion | Legacy Bus Address Decoding |
|---|---|
|
Use Scenario: Expanding discrete I/O points in programmable logic controllers using parallel address/data buses. IC Role / Device Role / Timing Role: Decoder mapping 4-bit address lines to individual output enable signals for relay drivers or sensor interface ICs. Use Value: Eliminates need for multiple 74HC138 devices; single CD74HC4514M handles full 16-channel selection with latch synchronization. |
Use Scenario: Selecting between up to 16 peripheral devices (e.g., ADCs, DACs, UARTs) on an 8-bit microcontroller bus. IC Role / Device Role / Timing Role: Address decoder asserting chip-select lines based on upper address bits (A0–A3), synchronized via LE to match bus access timing. Use Value: Enables deterministic, glitch-free peripheral selection with tPHL/tPLH ≤ 71 ns (6V, -55°C to +125°C), meeting tight microcontroller wait-state requirements. |
| Test Equipment Signal Routing | Automotive ECU Subsystem Enable |
|
Use Scenario: Routing test signals to one of 16 calibration channels in automated test equipment (ATE) racks. IC Role / Device Role / Timing Role: Demultiplexer using E as serial data input and A0–A3 as channel address, controlled by FPGA sequencer. Use Value: Supports high-reliability signal switching with ±25 mA output drive and ESD protection, eliminating mechanical relay wear. |
Use Scenario: Enabling specific sensor conditioning or actuator driver circuits within engine control units under extreme ambient temperatures. IC Role / Device Role / Timing Role: High-temperature-stable decoder activating subsystem power rails or analog front-end enables based on diagnostic mode register bits. Use Value: Guaranteed operation from -55°C to +125°C ensures functional safety compliance without derating or thermal throttling. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar 4-to-16 decoder/demultiplexer applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| CD74HC4515M | Identical pinout and timing, but outputs are active-low (Y0–Y15 = logic 0 when selected). | Requires inverted logic handling in downstream circuitry; unsuitable where active-high assertion is mandatory. | Select CD74HC4515M only when interfacing with open-collector or NAND-gate-based enable networks. |
| SN74HC154N | Same 4-to-16 decode function but no input latches; lacks LE pin and transparent/latched mode. | Cannot synchronize address capture to external clock edges; limited to combinatorial decode use cases. | Choose SN74HC154N for simpler, lower-cost decode where latch timing control is unnecessary. |
Compared with CD74HC4514M, CD74HC4515M offers identical timing and packaging but inverted output polarity, while SN74HC154N removes latch functionality - making CD74HC4514M uniquely suited for synchronous address capture in real-time control systems.
Availability
CD74HC4514M is available at Aetrix Electronics and suitable for industrial PLC I/O expansion, legacy bus address decoding, and automotive ECU subsystem enable requiring stable component supply across extended temperature ranges.
Supply support for CD74HC4514M 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
Texas Instruments is a global semiconductor leader specializing in analog, embedded processing, and logic solutions, with over 90 years of innovation in high-reliability IC design.
The CD74HC4514M belongs to TI's HC logic family, engineered for low-power, high-noise-immunity digital interfacing in harsh-environment industrial and automotive systems.
FAQ
What is the maximum propagation delay of CD74HC4514M across its full operating temperature range?
The maximum propagation delay from E input to any Y output is 71 ns at VCC = 6V, measured over the full -55°C to +125°C temperature range. This value is specified in the switching characteristics table under "E to Outputs" with CL = 50pF and input rise/fall times of 6ns. CD74HC4514M maintains consistent timing performance across extreme temperatures, supporting deterministic real-time control.
Can CD74HC4514M operate reliably at 3.3V supply voltage?
Yes, CD74HC4514M is fully specified for operation from 2V to 6V, including 3.3V. At VCC = 3.3V, VIH is guaranteed ≥ 2.31V and VIL ≤ 1.09V, providing 30% noise margin. All DC and AC parameters - including output drive (10 LSTTL loads) and propagation delay (~60 ns typical) - remain valid at 3.3V, enabling direct interfacing with modern microcontrollers.
How does the latch enable (LE) pin affect output behavior in CD74HC4514M?
When LE is high, CD74HC4514M operates in transparent mode: outputs Y0–Y15 immediately reflect changes on A0–A3 inputs. When LE transitions low, outputs freeze at their prior logic states and ignore further A0–A3 changes until LE goes high again. This latching action allows CD74HC4514M to capture and hold address values synchronized to system clocks or control strobes.
Is CD74HC4514M pin-compatible with CD74HC4515M?
Yes, CD74HC4514M and CD74HC4515M share identical pinout, package (SOIC-24), and timing specifications. The sole functional difference is output polarity: CD74HC4514M asserts selected outputs high (Yx = 1), while CD74HC4515M asserts them low (Yx = 0). No PCB layout change is required for substitution, but logic inversion must be accounted for in downstream circuitry.
What is the thermal resistance (θJA) of CD74HC4514M in its SOIC package?
The junction-to-ambient thermal resistance (θJA) of CD74HC4514M in the SOIC (DW) package is 46°C/W, as specified in the Thermal Information section of the datasheet. This value assumes standard JEDEC 2-layer board conditions and enables accurate junction temperature estimation under load - critical for reliability validation in high-temperature industrial deployments of CD74HC4514M.
CD74HC4514M Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- 74HC
- Package/Case:
- 24-SOIC (0.295", 7.50mm Width)
- Packaging:
- Bulk
- Product Status:
- Obsolete
- Type:
- Decoder/Demultiplexer
- Circuit:
- 1 x 4:16
- Independent Circuits:
- 1
- Current - Output High, Low:
- 5.2mA, 5.2mA
- Voltage Supply Source:
- Single Supply
- Voltage - Supply:
- 2V ~ 6V
- Operating Temperature:
- -55°C ~ 125°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 24-SOIC
CD74HC4514M FAQ
1.How can I place an order for CD74HC4514M through Aetrix?
Please submit a Request for Quotation (RFQ) for CD74HC4514M 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 CD74HC4514M reliable?
The price and inventory of CD74HC4514M are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for CD74HC4514M is usually 5 days.
3.What payment methods are accepted for CD74HC4514M?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for CD74HC4514M transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for CD74HC4514M?
CD74HC4514M orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your CD74HC4514M 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 CD74HC4514M?
For technical support, including CD74HC4514M datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your CD74HC4514M requirements.
6.How does Aetrix verify that CD74HC4514M is sourced from the original manufacturer or authorized distributors?
All CD74HC4514M 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 CD74HC4514M meets industry standards.
7.What is the process for return or replacement of CD74HC4514M?
All CD74HC4514M units undergo pre-shipment inspection (PSI). If there is an issue with CD74HC4514M, 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 CD74HC4514M part is unused and in its original packaging.
Return procedure for CD74HC4514M:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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