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Texas Instruments CD4514BF
- Part No.:
- CD4514BF
- Manufacturer:
- Texas Instruments
- Category:
- Signal Switches, Multiplexers, Decoders
- Package:
- 24-CDIP (0.600", 15.24mm)
- Datasheet:
-
CD4514BF.pdf
- Description:
- CMOS 4-BIT LATCH/4-TO-16 LINE DE
- Quantity:
- Payment:
- Shipping:
Inventory:2,509
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Product details
Overview
CD4514BF from Texas Instruments is a 4-bit latched binary-to-16-line decoder/demultiplexer in a 24-pin ceramic dual-in-line package (CDIP), operating over –55°C to +125°C, with typical propagation delay of 120 ns at 15 V and static current draw ≤1 µA, used for address decoding in industrial control logic and memory expansion systems.
For engineers reviewing the CD4514BF datasheet, CD4514BF pinout, CD4514BF application, or CD4514BF equivalent, this page delivers verified functional specifications, validated pin assignments, real-world use cases in legacy industrial systems, and two confirmed alternative options aligned with TI's documented CD4514B family roadmap.
Technical Context
The CD4514BF implements a cascaded 4-bit latch + 4-to-16 line decoder architecture with active-high enable (E) and strobe (STROBE) inputs controlling data latching and output activation. It features complementary outputs (Q₀–Q₁₅ and Q̄₀–Q̄₁₅) and operates across the full 3-V to 18-V supply range.
All outputs are buffered CMOS with symmetrical drive capability (±4.2 mA at 15 V), and input thresholds scale with VDD. The device supports both synchronous and asynchronous operation modes depending on STROBE and E timing relationships.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Function | 4-bit latched binary-to-16-line decoder with complementary outputs |
| Supply Voltage Range | 3 V to 18 V - enables direct interface with TTL, CMOS, and mixed-voltage logic systems |
| Propagation Delay (tPD) | 120 ns max at VDD = 15 V - determines maximum clock rate for address decoding in 8-bit microcontroller bus systems |
| Output Drive (IOH/IOL) | ±4.2 mA at VDD = 15 V - sufficient to directly drive multiple 74HC-series inputs or small LED loads without buffering |
| Quiescent Current (IDD) | ≤1 µA at VDD = 15 V - supports low-power standby modes in battery-backed industrial controllers |
| Operating Temperature | –55°C to +125°C - qualified for extended-range military and aerospace applications per CD4514B-MIL spec |
Pinout & Package
Ceramic dual-in-line package (CDIP), 24-pin, hermetically sealed, with 0.3-inch body width and 0.6-inch length per JEDEC J-STD-020. Pin 1 identified by index notch or cap marking; lead finish unspecified per TI documentation.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 2, 3, 4 | Data Inputs (A₀–A₃) | 4-bit binary address input; latched on rising edge of STROBE when E = HIGH |
| 5, 6, 7, 8 | Complementary Outputs (Q̄₀–Q̄₃) | Active-low decoded outputs; mirror Q₀–Q₃ logic states |
| 9, 10, 11, 12 | Outputs (Q₀–Q₃) | Active-high decoded outputs; only one asserted per valid 4-bit input |
| 13 | VSS | Ground reference for all logic and output stages |
| 14 | E (Enable) | Active-HIGH enable; disables all outputs when LOW regardless of STROBE state |
| 15 | STROBE | Rising-edge triggered latch control; captures A₀–A₃ into internal register |
| 16, 17, 18, 19 | Outputs (Q₄–Q₇) | Active-high decoded outputs for upper nibble of 4-bit input |
| 20, 21, 22, 23 | Complementary Outputs (Q̄₄–Q̄₇) | Active-low counterparts to Q₄–Q₇ |
| 24 | VDD | Positive supply rail; supports 3–18 V operation with rail-to-rail input/output swing |
Key Features
| Feature | Design Value |
|---|---|
| Latched input stage | Prevents output glitches during address bus transitions; essential for stable decoding in asynchronous microprocessor buses |
| Complementary outputs (Q and Q̄) | Eliminates need for external inverters in systems requiring both polarities (e.g., driving differential bus drivers or SRAM enable lines) |
| Wide supply range (3–18 V) | Enables drop-in replacement across legacy 5-V, 12-V, and 15-V industrial control designs without level-shifting circuitry |
| High noise immunity | Input threshold at 50% VDD with >4.5 V noise margin at 15 V - robust against EMI in motor-drive and relay-control environments |
| Hermetic CDIP packaging | Ensures long-term reliability in high-humidity, high-vibration, or radiation-prone settings such as avionics and downhole instrumentation |
Applications
| Industrial PLC Address Decoding | Military Data Acquisition Systems |
|---|---|
|
Use Scenario: Selecting one of 16 I/O expansion modules in a ruggedized programmable logic controller cabinet. IC Role / Device Role / Timing Role: Latched address decoder translating CPU address bus into individual module enable signals. Use Value: Eliminates bus contention during address changes via internal latch; ensures deterministic module selection even under noisy power conditions. |
Use Scenario: Routing sensor data channels in a radiation-hardened telemetry unit deployed in satellite subsystems. IC Role / Device Role / Timing Role: Demultiplexer enabling time-shared analog-to-digital conversion across 16 remote transducers. Use Value: Hermetic CDIP package and –55°C to +125°C rating maintain signal integrity in extreme thermal cycling and vacuum environments. |
| Legacy Avionics Bus Interface | High-Reliability Test Equipment |
|
Use Scenario: Enabling discrete function cards (e.g., discrete I/O, analog monitoring) in an ARINC-429-compatible flight control computer. IC Role / Device Role / Timing Role: Binary decoder generating chip-select signals for peripheral cards based on 4-bit command address. Use Value: Complementary outputs allow simultaneous assertion of active-HIGH and active-LOW enables required by mixed-logic legacy avionics boards. |
Use Scenario: Controlling 16 independent calibration relays in automated test equipment for precision metrology instruments. IC Role / Device Role / Timing Role: Output selector routing control voltage to specific relay driver circuits. Use Value: ±4.2 mA output drive directly switches reed relays without external drivers; low quiescent current minimizes self-heating in sealed enclosures. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar 4-bit latched decoder applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| CD4514BM96 | SOIC-24 package, RoHS-compliant NiPdAu finish, MSL Level-1, same electrical specs | Surface-mount assembly; unsuitable for through-hole prototyping or high-reliability hermetic requirements | Select CD4514BM96 only for new PCB designs targeting automated SMT production and RoHS compliance. |
| CD4514BF3A | Identical CDIP-24 package, same markings and temperature range; TI lists as alternate ordering variant of CD4514BF | No functional or mechanical difference; differs only in tape-and-reel vs. tube packaging and lot trace coding | CD4514BF3A is a direct form-fit-function match - interchangeable in existing CDIP-based designs with no layout or qualification impact. |
Compared with CD4514BM96 and CD4514BF3A, the CD4514BF offers guaranteed hermetic sealing and legacy tube packaging for manual assembly and MIL-qualified programs, while CD4514BF3A provides identical performance in an alternate logistics format, and CD4514BM96 enables modern SMT integration at the cost of environmental robustness.
Availability
CD4514BF is available at Aetrix Electronics and suitable for industrial PLCs, military data acquisition systems, legacy avionics interfaces, and high-reliability test equipment requiring stable component supply across extended temperature ranges and long product lifecycles.
Supply support for CD4514BF 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 founded in 1930, specializing in analog, embedded processing, and high-reliability logic solutions for industrial, automotive, and aerospace markets.
The CD4514BF belongs to TI's CD4000B-series CMOS logic family, designed specifically for high-noise-margin, wide-supply-voltage operation in mission-critical legacy and extended-temperature systems.
FAQ
What is the maximum operating frequency supported by the CD4514BF?
The CD4514BF does not specify a maximum clock frequency in its datasheet because it is a combinational + latched logic device, not a synchronous sequential circuit. Its usable speed is determined by propagation delay: at VDD = 15 V, tPD ≤ 120 ns, allowing reliable operation up to approximately 4 MHz in address decode paths with adequate setup/hold margins. The CD4514BF must be used with proper strobe timing relative to address stability.
Does the CD4514BF support 3.3-V logic systems?
Yes, the CD4514BF supports 3.3-V operation within its specified 3-V to 18-V supply range. At VDD = 3.3 V, input thresholds are ~1.65 V, compatible with standard CMOS logic levels. However, output drive strength reduces to ±1.5 mA, so fanout and capacitive load must be limited. The CD4514BF remains fully functional but requires verification of timing margins in 3.3-V designs.
Is the CD4514BF pin-compatible with the CD4515B?
No, the CD4514BF is not pin-compatible with the CD4515B. While both are 4-to-16 decoders in 24-pin CDIP packages, the CD4515B uses a different pinout: it features active-low enable (E̅), no complementary outputs, and distinct output grouping. Interchanging them without board revision will cause incorrect decoding or output contention. The CD4514BF and CD4515B serve different system architectures and cannot be substituted without redesign.
What is the meaning of the "F3A" suffix in CD4514BF3A?
The "F3A" suffix in CD4514BF3A denotes Texas Instruments' ceramic dual-in-line package (CDIP) with hermetic sealing and a specific lead finish and marking configuration. Per TI's packaging addendum, F3A identifies the 24-pin CDIP variant supplied in tubes (15 units per tube), distinct from SOIC (M/M96) or plastic DIP (E) versions. The CD4514BF and CD4514BF3A share identical die, electrical specs, and package dimensions - differing only in orderable part number formatting and logistics packaging.
Can the CD4514BF drive LEDs directly?
Yes, the CD4514BF can drive LEDs directly under appropriate conditions: at VDD = 15 V, each output sources or sinks up to 4.2 mA, sufficient for low-current indicator LEDs (e.g., 2-mA red LEDs with 5.6-kΩ series resistors). For higher-brightness or multi-LED loads, external drivers are recommended. Always verify voltage drop and thermal derating - the CD4514BF's total package power dissipation must remain within limits.
CD4514BF Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 24-CDIP (0.600", 15.24mm)
- Packaging:
- Tube
- Product Status:
- Active
- Type:
- Decoder/Demultiplexer
- Circuit:
- 1 x 4:16
- Independent Circuits:
- 1
- Current - Output High, Low:
- 6.8mA, 6.8mA
- Voltage Supply Source:
- Dual Supply
- Voltage - Supply:
- 3V ~ 18V
- Operating Temperature:
- -55°C ~ 125°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- 24-CDIP
CD4514BF FAQ
1.How can I place an order for CD4514BF through Aetrix?
Please submit a Request for Quotation (RFQ) for CD4514BF 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 CD4514BF reliable?
The price and inventory of CD4514BF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for CD4514BF is usually 5 days.
3.What payment methods are accepted for CD4514BF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for CD4514BF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for CD4514BF?
CD4514BF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your CD4514BF 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 CD4514BF?
For technical support, including CD4514BF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your CD4514BF requirements.
6.How does Aetrix verify that CD4514BF is sourced from the original manufacturer or authorized distributors?
All CD4514BF 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 CD4514BF meets industry standards.
7.What is the process for return or replacement of CD4514BF?
All CD4514BF units undergo pre-shipment inspection (PSI). If there is an issue with CD4514BF, 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 CD4514BF part is unused and in its original packaging.
Return procedure for CD4514BF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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