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Texas Instruments CD74HCT4514EG4
- Part No.:
- CD74HCT4514EG4
- Manufacturer:
- Texas Instruments
- Category:
- Signal Switches, Multiplexers, Decoders
- Package:
- 24-DIP (0.600", 15.24mm)
- Datasheet:
-
CD74HCT4514EG4.pdf
- Description:
- IC DECODER/DEMUX 1X4:16 24DIP
- Quantity:
- Payment:
- Shipping:
Inventory:2,078
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Product details
Overview
CD74HCT4514EG4 from Texas Instruments is a 4-line to 16-line decoder/demultiplexer with input latches, operating at 4.5 V–5.5 V VCC, featuring 16 active-high outputs, latch enable (LE) control, and E-input for enable/demultiplex selection in industrial control logic. It delivers balanced propagation delays (55 ns max), low quiescent current (8 µA typ), and operates across –55°C to 125°C.
For engineers reviewing the CD74HCT4514EG4 datasheet, CD74HCT4514EG4 pinout, CD74HCT4514EG4 application, or CD74HCT4514EG4 equivalent, key selection criteria include latch-controlled address decoding, HCT-level TTL/CMOS compatibility (VIH = 2 V min, VIL = 0.8 V max), output drive capability (±25 mA), and PDIP-24 package suitability for legacy board designs and test fixtures.
Technical Context
The CD74HCT4514EG4 integrates a 4-bit strobed latch and a 4-to-16 line decoder in a single silicon-gate CMOS device. When LE is high, outputs follow A0–A3 inputs in real time; when LE is low, outputs retain their prior state (high for CD74HCT4514 variant). The E input serves dual roles: enable/disable of all outputs (low-active) and data input for demultiplexing mode.
It supports cascading via E as chip select and exhibits HCT-specific input thresholds (VIH ≥ 2 V, VIL ≤ 0.8 V) with CMOS-compatible leakage (II ≤ 1 µA). Propagation delay (tpd = 55 ns max) and transition time (tt = 15 ns max) are specified at CL = 50 pF, VCC = 4.5 V, and TA = 25°C - consistent across its full temperature range.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCC Range | 4.5 V to 5.5 V - ensures compatibility with standard 5 V TTL/CMOS systems without level-shifting. |
| Propagation Delay (tpd) | 55 ns max (A0–A3 to Y0–Y15) - enables reliable timing in synchronous address decoding up to ~10 MHz. |
| Output Drive | ±25 mA per output - supports direct interface to LED indicators, small relays, or TTL fanout loads. |
| Input Thresholds | VIH = 2 V min, VIL = 0.8 V max - guarantees robust noise margin and interoperability with LSTTL logic families. |
| Operating Temperature | –55°C to 125°C - qualified for extended industrial, aerospace, and under-hood automotive environments. |
| Quiescent Current (ICC) | 8 µA typical at VCC = 5.5 V - reduces standby power in battery-backed or energy-sensitive control modules. |
| Power Dissipation Cap. | Cpd = 75 pF - used to calculate dynamic power consumption (P = Cpd × V² × f) in clocked applications. |
Pinout & Package
CD74HCT4514EG4 is housed in a 24-pin plastic dual-in-line package (PDIP), JEDEC MS-010 compliant, with 0.300-inch body width and through-hole mounting. Pin 12 is GND, pin 24 is VCC, and all pins are assigned per TI's official top-view marking diagram.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | LE (Latch Enable) | Active-high control: enables transparent latch behavior when high; freezes output state when low. |
| 2–5 | A0–A3 (Address Inputs) | 4-bit binary address bus determining which of 16 outputs (Y0–Y15) is asserted. |
| 6–9, 10, 11, 13–20 | Y0–Y15 (Outputs) | 16 active-high decoded outputs - only one high per valid address when E = low. |
| 12 | GND | Ground reference for all internal logic and output drivers. |
| 21–23 | A2, A3, E | A2/A3 continue address mapping; E is active-low enable/demux data input. |
| 24 | VCC | Positive supply rail (4.5–5.5 V) powering CMOS logic and output buffers. |
Key Features
| Feature | Design Value |
|---|---|
| Latched Address Decoding | Stable output retention during address bus changes - eliminates glitches in multiplexed display or memory select circuits. |
| HCT Logic Family Compatibility | Direct interface with LSTTL without pull-ups - VIH/VIL thresholds match legacy TTL while consuming <10% of its power. |
| Dual-Mode Operation | Decoder mode (E = low) or 1-of-16 demultiplexer (E = data, A0–A3 = address) - increases functional density per IC. |
| Wide Temperature Range | –55°C to 125°C operation - supports deployment in unheated outdoor enclosures or engine-control units without derating. |
| Low Input Current | II ≤ 1 µA at VOH/VOL - minimizes loading on upstream drivers and preserves signal integrity in high-fanout buses. |
Applications
| Industrial PLC I/O Expansion | Legacy Instrumentation Multiplexing |
|---|---|
Use Scenario: Expanding discrete output points in programmable logic controllers using a shared 4-bit address bus and strobe signal. IC Role / Device Role / Timing Role: Address decoder that converts microcontroller GPIO outputs into 16 independent relay or solenoid control lines. Use Value: Eliminates need for multiple smaller decoders; latch function prevents spurious activation during address transitions. |
Use Scenario: Routing analog sensor readings or digital status flags from 16 sources to a single ADC or UART input in test equipment. IC Role / Device Role / Timing Role: Demultiplexer using E as data input and A0–A3 as channel-select address. Use Value: Reduces component count versus discrete analog switches; HCT speed supports sampling rates up to 10 kSPS. |
| LED Matrix Row Selection | Memory Address Decoding |
Use Scenario: Driving rows of a 16×N LED display where row activation must be synchronized with column data updates. IC Role / Device Role / Timing Role: High-current row driver with latch hold to stabilize row selection during column scanning cycles. Use Value: ±25 mA output drive directly powers common-anode LED rows; LE synchronization avoids partial-row flicker. |
Use Scenario: Selecting one of 16 memory-mapped peripheral registers in an 8-bit microcontroller system with limited address lines. IC Role / Device Role / Timing Role: Address decoder enabling chip-select signals for external peripherals such as UARTs or timers. Use Value: Propagation delay <55 ns ensures setup/hold compliance with 8051 or Z80 bus timing requirements. |
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 |
|---|---|---|---|
| SN74HCT154N | No input latch; outputs active-low; identical VCC, timing, and package. | Requires external latch or microcontroller timing control for glitch-free operation. | Select when latch functionality is unnecessary and active-low enable is preferred. |
| CD74HC4514E | High-speed CMOS (HC) version: wider VCC range (2–6 V), higher ICC, no LSTTL input compatibility. | Not suitable for mixed TTL/CMOS systems requiring VIH = 2 V min; better for battery-powered 3.3 V designs. | Select for lower-voltage operation or when LSTTL interfacing is not required. |
Compared with SN74HCT154N and CD74HC4514E, the CD74HCT4514EG4 uniquely combines latch-enabled decoding, active-high outputs, and guaranteed LSTTL compatibility - making it optimal for retrofitting legacy 5 V control systems where signal integrity during address updates is critical.
Availability
CD74HCT4514EG4 is available at Aetrix Electronics and suitable for industrial PLC I/O expansion, legacy instrumentation multiplexing, and LED matrix row selection requiring stable component supply, long-term obsolescence management, and through-hole assembly compatibility.
Supply support for CD74HCT4514EG4 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 industrial, automotive, and communications markets.
The CD74HCT4514EG4 belongs to TI's HCT logic family - designed specifically to bridge TTL and CMOS systems with pin-compatible replacements, low power, and extended temperature reliability for mission-critical control applications.
FAQ
What is the function of the LE pin on the CD74HCT4514EG4?
The LE (Latch Enable) pin controls whether the CD74HCT4514EG4 operates in transparent or latched mode. When LE is high, outputs Y0–Y15 follow A0–A3 inputs in real time. When LE is low, outputs freeze at their last valid state - preventing glitches during address bus transitions. This behavior is intrinsic to the CD74HCT4514EG4's architecture and confirmed in its decode function table and logic diagram.
Does the CD74HCT4514EG4 support demultiplexing, and how is it configured?
Yes, the CD74HCT4514EG4 supports demultiplexing by using the E input as the data line and A0–A3 as the 4-bit channel address. When E is high, all outputs are disabled; when E is low, the addressed output goes high. This dual-mode capability - decoder or demux - is explicitly defined in the device description and functional table of the CD74HCT4514EG4 datasheet.
What is the maximum output current per pin for the CD74HCT4514EG4?
The CD74HCT4514EG4 supports ±25 mA continuous output source or sink current per Y0–Y15 pin, as specified in its Absolute Maximum Ratings table. This allows direct driving of LEDs, small relays, or TTL inputs without external buffers - a verified design value confirmed across all operating conditions in the CD74HCT4514EG4 electrical characteristics section.
Is the CD74HCT4514EG4 compatible with LSTTL logic levels?
Yes, the CD74HCT4514EG4 provides direct LSTTL input compatibility: VIH is guaranteed ≥ 2 V (minimum) and VIL ≤ 0.8 V (maximum), matching standard LSTTL thresholds. This compatibility is a defining feature of the HCT family and is explicitly stated in the CD74HCT4514EG4 datasheet's "HCT Types" section and electrical characteristics tables.
What package type is used for the CD74HCT4514EG4, and is it RoHS-compliant?
The CD74HCT4514EG4 uses a 24-pin plastic dual-in-line package (PDIP) per JEDEC MS-010, with G4 suffix indicating green (halogen-free) and RoHS-compliant construction. TI's packaging documentation confirms the G4 suffix denotes lead-free terminations and compliance with EU RoHS Directive 2011/65/EU - a verified specification for the CD74HCT4514EG4 orderable part number.
CD74HCT4514EG4 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- 74HCT
- Package/Case:
- 24-DIP (0.600", 15.24mm)
- 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:
- -55°C ~ 125°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- 24-PDIP
CD74HCT4514EG4 FAQ
1.How can I place an order for CD74HCT4514EG4 through Aetrix?
Please submit a Request for Quotation (RFQ) for CD74HCT4514EG4 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 CD74HCT4514EG4 reliable?
The price and inventory of CD74HCT4514EG4 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for CD74HCT4514EG4 is usually 5 days.
3.What payment methods are accepted for CD74HCT4514EG4?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for CD74HCT4514EG4 transactions.
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4.How is shipping managed for CD74HCT4514EG4?
CD74HCT4514EG4 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your CD74HCT4514EG4 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 CD74HCT4514EG4?
For technical support, including CD74HCT4514EG4 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your CD74HCT4514EG4 requirements.
6.How does Aetrix verify that CD74HCT4514EG4 is sourced from the original manufacturer or authorized distributors?
All CD74HCT4514EG4 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 CD74HCT4514EG4 meets industry standards.
7.What is the process for return or replacement of CD74HCT4514EG4?
All CD74HCT4514EG4 units undergo pre-shipment inspection (PSI). If there is an issue with CD74HCT4514EG4, 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 CD74HCT4514EG4 part is unused and in its original packaging.
Return procedure for CD74HCT4514EG4:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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