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Texas Instruments CD54HCT151F3A
- Part No.:
- CD54HCT151F3A
- Manufacturer:
- Texas Instruments
- Category:
- Signal Switches, Multiplexers, Decoders
- Package:
- 16-CDIP (0.300", 7.62mm)
- Datasheet:
-
CD54HCT151F3A.pdf
- Description:
- HIGH SPEED CMOS LOGIC 8-INPUT MU
- Quantity:
- Payment:
- Shipping:
Inventory:2,990
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Product details
Overview
CD54HCT151F3A from Texas Instruments is a military-grade 8-input digital multiplexer with complementary non-inverting (Y) and inverting (W) outputs, three binary select inputs (A/B/C), and active-low enable (G). It operates from 4.5 V to 5.5 V, delivers propagation delays as low as 12 ns (enable-to-Y, 25°C, CL = 15 pF), and supports full military temperature range (–55°C to +125°C). It is used in high-reliability data routing within avionics control logic and hardened test instrumentation.
For engineers reviewing the CD54HCT151F3A datasheet, CD54HCT151F3A pinout, CD54HCT151F3A application, or CD54HCT151F3A equivalent, key selection criteria include its TTL-compatible input thresholds (VIL ≤ 0.8 V, VIH ≥ 2.0 V), dual-output polarity support, guaranteed operation across extreme temperatures, and CDIP-16 hermetic packaging for radiation-tolerant systems.
Technical Context
The CD54HCT151F3A implements a single-pole, 8-throw analog-style switching function using CMOS logic gates - not transmission gates - enabling deterministic digital signal routing without analog leakage or charge injection concerns. Its internal architecture buffers all inputs and outputs, ensuring consistent drive strength and noise immunity across the full operating range.
It features fully decoded 3-bit binary selection (CBA) that routes exactly one of eight data inputs (D0–D7) to both Y (non-inverted) and W (inverted) outputs simultaneously when G is low; all outputs go high-impedance when G is high. No internal latching or memory is present - it is purely combinational.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage | 4.5 V to 5.5 V - ensures direct compatibility with standard 5 V LSTTL logic rails and eliminates need for level-shifting circuitry. |
| Propagation Delay (G → Y) | 12 ns min / 44 ns max (–55°C to +125°C, CL = 50 pF) - enables synchronization in sub-25 MHz digital control loops. |
| Input Thresholds | VIL ≤ 0.8 V, VIH ≥ 2.0 V - guarantees robust interfacing with legacy 5 V TTL outputs without external pull-ups or translators. |
| Output Drive | ±4 mA at VCC = 4.5 V - sufficient to drive 10 LSTTL loads directly, reducing fanout buffer count in dense logic arrays. |
| Operating Temperature | –55°C to +125°C - qualified per MIL-PRF-38535 for use in aerospace, defense, and downhole industrial systems. |
| Package | CDIP-16 (J package), 24.38 mm × 6.92 mm - hermetically sealed ceramic dual in-line package with through-hole leads for high-reliability PCB mounting. |
| Power Dissipation Cap. | CPD = 58 pF - allows accurate dynamic power estimation (PD = VCC² × f × (CPD + CL)) for thermal design in sealed enclosures. |
Pinout & Package
CD54HCT151F3A is housed in a 16-pin Ceramic Dual In-line Package (CDIP, J package), with 0.300-inch row spacing and hermetic glass-seal construction. Pin 1 is located at the left end of the top row, identified by a notch or dot marking on the package body.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| G | Active-low enable | When high, forces Y and W into high-impedance state - essential for bus sharing and multi-mux cascading. |
| A, B, C | Binary select inputs | Decode 3-bit address (CBA) to select D0–D7; internally buffered to reject noise and ensure monotonic switching. |
| D0–D7 | Data inputs | Eight independent digital inputs; no internal termination - require external biasing if unused to prevent floating states. |
| Y | Non-inverting output | Passes selected input signal without inversion; driven actively high/low - not open-drain or open-collector. |
| W | Inverting output | Provides logical complement of Y output simultaneously - eliminates need for external inverters in differential routing. |
| VCC | Positive supply | Must be decoupled with 0.1 µF ceramic capacitor placed ≤2 mm from pin to suppress switching transients. |
| GND | Ground reference | Common return for all inputs, outputs, and supply - requires low-inductance connection to minimize ground bounce. |
Key Features
| Feature | Design Value |
|---|---|
| Complementary outputs (Y and W) | Enables single-device generation of true/complement signals for clock gating, parity generation, or differential bus driving. |
| Buffered inputs and outputs | Eliminates timing skew between select lines and data paths; maintains consistent VIH/VIL margins across temperature and voltage extremes. |
| LSTTL input compatibility | Accepts standard TTL output levels directly - no external resistors or level shifters required in mixed-logic systems. |
| Wide temperature operation | Validated performance from –55°C to +125°C supports deployment in unheated avionics bays and engine-mounted controllers. |
| Low quiescent current | ICC ≤ 160 µA over full temperature range - critical for battery-backed or low-power standby modes in mission-critical systems. |
Applications
| Avionics Data Bus Multiplexing | Hardened Test Equipment Signal Routing |
|---|---|
Use Scenario: Selecting among eight discrete sensor inputs (e.g., pressure, temperature, acceleration) in a flight control computer for sequential ADC sampling. IC Role / Device Role / Timing Role: Digital signal router that synchronizes input selection with system clock edges; provides simultaneous true/complement outputs for fault-detection logic. Use Value: Reduces component count vs. discrete gate-based mux solutions; eliminates timing uncertainty from cascaded logic stages in safety-critical sampling paths. | Use Scenario: Configuring stimulus/sense paths in automated test equipment for semiconductor wafer probing under thermal stress conditions. IC Role / Device Role / Timing Role: High-reliability channel selector enabling programmable test pattern injection and response capture across multiple DUT pins. Use Value: Hermetic CDIP package withstands thermal cycling; guaranteed operation at –55°C ensures stable timing during cryogenic device characterization. |
| Redundant Control Logic Voting | Military Communications Baseband Switching |
Use Scenario: Implementing triple-modular redundancy (TMR) voter logic where three independent processor outputs feed D0–D2, with majority decision routed to downstream logic. IC Role / Device Role / Timing Role: Combinational selector that forwards the dominant logic state without storage - avoids metastability risks of clocked voting circuits. Use Value: Enables fail-operational behavior in radiation-prone environments; dual Y/W outputs support concurrent monitoring and error flagging. | Use Scenario: Dynamically reconfiguring baseband signal paths (e.g., I/Q channel swapping, filter bypass) in SDR radios deployed in tactical field units. IC Role / Device Role / Timing Role: Low-latency digital switch controlling RF front-end configuration registers and analog path enables via GPIO-controlled logic trees. Use Value: Sub-50 ns worst-case propagation delay ensures real-time reconfiguration within TDMA frame boundaries; military temp rating supports desert/high-altitude operations. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar 8-input multiplexer applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| CD74HCT151E | Same logic function and pinout, but in plastic PDIP-16 package; rated only for –55°C to +125°C with commercial reliability screening (not QML-qualified). | Suitable for non-mission-critical industrial controls where hermeticity and radiation tolerance are not required. | Select CD74HCT151E only when cost and RoHS compliance are prioritized over military qualification and long-term reliability under thermal stress. |
| SN54HCT151J | Functionally identical, also CDIP-16, but manufactured by TI under older SMD-5962-90652 revision; identical electrical specs and military temp range. | Legacy part with identical form, fit, and function - used interchangeably in legacy designs with approved pedigree documentation. | Choose SN54HCT151J only when maintaining strict pedigree traceability for existing hardware revisions certified under prior MIL-STD-883 versions. |
Compared with CD74HCT151E, CD54HCT151F3A adds hermetic sealing and QML-38535 Class V qualification for radiation-hardened use; compared with SN54HCT151J, it reflects updated process controls and enhanced screening while preserving full backward compatibility in layout and firmware.
Availability
CD54HCT151F3A is available at Aetrix Electronics and suitable for avionics subsystem integration, hardened test instrumentation, redundant flight control logic, and military communications baseband design requiring stable component supply across extended product lifecycles.
Supply support for CD54HCT151F3A 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 high-reliability logic solutions for industrial, automotive, aerospace, and defense markets.
The CD54HCT151F3A belongs to TI's military-grade HCT logic family, designed specifically for high-integrity digital routing in systems where extended temperature operation, radiation tolerance, and long-term supply assurance are mandatory.
FAQ
What is the maximum clock frequency supported by CD54HCT151F3A for reliable data routing?
The CD54HCT151F3A is a combinational logic device with no internal clock - it does not operate at a "clock frequency." Its usable data rate is determined by propagation delay and system setup/hold timing. With a worst-case enable-to-Y delay of 44 ns (–55°C to +125°C), it supports reliable routing of signals with transitions up to approximately 10–12 MHz in synchronous systems, assuming adequate board-level timing margin and load capacitance ≤50 pF. The CD54HCT151F3A must be used with externally generated control signals meeting its specified input transition times (≤500 ns for 4.5 V).
Does CD54HCT151F3A require external pull-up or pull-down resistors on unused inputs?
Yes - all unused inputs (A, B, C, D0–D7, G) on the CD54HCT151F3A must be terminated to a defined logic level (VCC or GND) to prevent floating states that cause excessive supply current, erratic output behavior, or increased EMI. TI explicitly mandates this in Section 9.1 of the datasheet. Leaving any input unconnected violates absolute maximum ratings and may degrade CD54HCT151F3A reliability in high-temperature operation. Use 1–10 kΩ resistors for robust biasing.
Can CD54HCT151F3A be used with 3.3 V logic systems?
No - the CD54HCT151F3A is strictly a 4.5 V to 5.5 V device. Its TTL-compatible input thresholds (VIH ≥ 2.0 V, VIL ≤ 0.8 V) and output drive specifications are characterized only within that supply range. Operating the CD54HCT151F3A at 3.3 V violates recommended conditions and results in undefined logic levels, excessive propagation delay, and potential failure to recognize valid inputs. For 3.3 V systems, use CD74HC151M or similar HC-series parts with 2–6 V operation.
What is the meaning of "F3A" in the CD54HCT151F3A part number?
The "F3A" suffix in CD54HCT151F3A denotes Texas Instruments' standardized military packaging and screening code: "F" indicates ceramic dual in-line package (CDIP), "3" specifies lead finish as solderable tin-lead (SnPb), and "A" identifies the revision level per TI's internal manufacturing documentation. This suffix confirms the device meets MIL-PRF-38535 Class V requirements and is distinct from commercial variants like CD74HCT151E (plastic DIP) or CD74HCT151M (SOIC). The CD54HCT151F3A is traceable to QML-certified production lots.
Is CD54HCT151F3A pin-compatible with CD54HC151F3A?
Yes - CD54HCT151F3A and CD54HC151F3A share identical pinout, package (CDIP-16), and functional block diagram. However, they differ electrically: CD54HC151F3A operates from 2 V to 6 V with CMOS input thresholds, while CD54HCT151F3A requires 4.5–5.5 V and accepts TTL-level inputs. Interchanging them without adjusting supply voltage and driving logic will cause functional failure. Both devices are drop-in replacements only when their respective voltage and interface requirements are met in the target system.
CD54HCT151F3A Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- 54HCT
- Package/Case:
- 16-CDIP (0.300", 7.62mm)
- Packaging:
- Tube
- Product Status:
- Active
- Type:
- Data Selector/Multiplexer
- Circuit:
- 1 x 8:1
- 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:
- 16-CDIP
CD54HCT151F3A FAQ
1.How can I place an order for CD54HCT151F3A through Aetrix?
Please submit a Request for Quotation (RFQ) for CD54HCT151F3A 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 CD54HCT151F3A reliable?
The price and inventory of CD54HCT151F3A are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for CD54HCT151F3A is usually 5 days.
3.What payment methods are accepted for CD54HCT151F3A?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for CD54HCT151F3A transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for CD54HCT151F3A?
CD54HCT151F3A orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your CD54HCT151F3A 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 CD54HCT151F3A?
For technical support, including CD54HCT151F3A datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your CD54HCT151F3A requirements.
6.How does Aetrix verify that CD54HCT151F3A is sourced from the original manufacturer or authorized distributors?
All CD54HCT151F3A 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 CD54HCT151F3A meets industry standards.
7.What is the process for return or replacement of CD54HCT151F3A?
All CD54HCT151F3A units undergo pre-shipment inspection (PSI). If there is an issue with CD54HCT151F3A, 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 CD54HCT151F3A part is unused and in its original packaging.
Return procedure for CD54HCT151F3A:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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