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Texas Instruments CD54HCT154F3A
- Part No.:
- CD54HCT154F3A
- Manufacturer:
- Texas Instruments
- Category:
- Signal Switches, Multiplexers, Decoders
- Package:
- 24-CDIP (0.600", 15.24mm)
- Datasheet:
-
CD54HCT154F3A.pdf
- Description:
- HIGH SPEED CMOS LOGIC 4-TO-16 LI
- Quantity:
- Payment:
- Shipping:
Inventory:1,625
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Product details
Overview
CD54HCT154F3A from Texas Instruments is a military-grade 4-to-16-line decoder/demultiplexer with dual enable inputs (E1, E2), operating over -55°C to +125°C, compatible with LSTTL logic levels (VIL ≤ 0.8 V, VIH ≥ 2.0 V), and specified for 4.5 V–5.5 V supply. It drives up to 15 LSTTL loads and supports cascading and demux functions in high-reliability timing and address selection circuits.
For engineers reviewing the CD54HCT154F3A datasheet, CD54HCT154F3A pinout, CD54HCT154F3A application, or CD54HCT154F3A equivalent, this page delivers verified electrical specs, CERDIP-24 package details, truth-table-driven decoding behavior, thermal limits, and qualified alternatives for aerospace, defense, and industrial control systems requiring extended temperature operation.
Technical Context
The CD54HCT154F3A implements active-low 4-bit binary decoding with two independent enable inputs: a High on either E1 or E2 forces all 16 outputs (Y0–Y15) High; only when both enables are Low does address decoding occur via A0–A3. Its HCT logic family ensures direct interface with legacy LSTTL drivers while maintaining CMOS input leakage (≤1 µA) and noise immunity (NIL/NIH = 30% of VCC).
Propagation delay is tightly controlled across temperature: 34–53 ns (E1/E2 to output, CL = 50 pF, VCC = 4.5 V), with balanced tPLH/tPHL and transition times ≤22 ns. The device uses standard TTL-compatible input thresholds and delivers VOH ≥ 3.7 V / VOL ≤ 0.4 V into 4-mA TTL loads at VCC = 4.5 V, enabling robust signal integrity in mixed-logic systems.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Function | 4-to-16 line decoder/demultiplexer with dual enable inputs |
| Supply Voltage Range | 4.5 V to 5.5 V - ensures compatibility with 5 V LSTTL and industrial power rails |
| Operating Temperature | -55°C to +125°C - qualified for military/aerospace environments per QML-38535 |
| Propagation Delay (E1→Y) | 34 ns (typ), 53 ns (max) at VCC = 4.5 V, CL = 50 pF - enables sub-20-MHz synchronous address decoding |
| Output Drive Capability | 15 LSTTL loads - sufficient to drive multiple downstream logic gates without buffering |
| Input Thresholds | VIL ≤ 0.8 V (max), VIH ≥ 2.0 V (min) - guarantees reliable recognition of standard TTL logic levels |
| Quiescent Current | ICC ≤ 160 µA at -55°C to +125°C - supports low-power standby in battery-backed or thermally constrained systems |
Pinout & Package
CD54HCT154F3A is housed in a hermetically sealed 24-lead CERDIP (Ceramic Dual-In-Line Package), designated J package per TI mechanical drawing MCDI004A. Dimensions: 0.624" × 0.245" × 0.220" (15.85 mm × 6.22 mm × 5.59 mm), with 0.100" lead pitch and glass-sealed ceramic body rated for harsh-environment reliability.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 13, 14, 15, 16, 17, 18, 19, 22, 23 | Y0–Y15, A0–A3, E1, E2 | Active-low decoded outputs (Y0–Y15); 4-bit address inputs (A0–A3); dual enable controls (E1, E2) |
| 12 | GND | Ground reference for all logic and power domains - must be low-impedance connection |
| 24 | VCC | Positive supply input - requires local 0.1 µF ceramic decoupling adjacent to pin |
Key Features
| Feature | Design Value |
|---|---|
| Dual enable architecture | Enables hierarchical decoding and cascading of multiple CD54HCT154F3A devices without external gating logic |
| LSTTL input compatibility | Eliminates level-shifting circuitry when interfacing with legacy 5 V TTL microcontrollers or FPGAs |
| Extended temperature operation | Validated performance from -55°C to +125°C supports deployment in engine bays, avionics bays, and space-qualified payloads |
| Low dynamic power dissipation | CPD = 84 pF at VCC = 5 V - reduces switching current and thermal load in dense logic arrays |
| High noise immunity | NIL = NIH = 30% of VCC at VCC = 5 V - suppresses false triggering in electrically noisy military platforms |
Applications
| Avionics Data Bus Decoding | Military Microcontroller Address Expansion |
|---|---|
Use Scenario: Selecting one of 16 peripheral registers in a MIL-STD-1553B remote terminal controller. IC Role / Device Role / Timing Role: Decoder mapping 4-bit command field to discrete register enable lines, synchronized to system clock edge. Use Value: Enables deterministic, glitch-free register access under EMI stress with guaranteed setup/hold margins across full temperature range. |
Use Scenario: Expanding 8-bit microcontroller I/O to manage 16 discrete sensors in an unmanned ground vehicle (UGV) control unit. IC Role / Device Role / Timing Role: Address demultiplexer routing parallel sensor data lines to dedicated ADC channels. Use Value: Reduces MCU GPIO count requirement by 12 pins while maintaining real-time response (<53 ns propagation delay). |
| Secure Communication Module Selection | Ruggedized Industrial PLC I/O Multiplexing |
Use Scenario: Enabling one of 16 encrypted comms modules in a tactical radio transceiver based on secure key state. IC Role / Device Role / Timing Role: Enable-controlled demultiplexer selecting active crypto channel; E1 used as data input, E2 held Low. Use Value: Supports fail-safe channel isolation with no cross-talk between modules due to guaranteed High-Z output state when either enable is asserted. |
Use Scenario: Routing analog sensor inputs to shared signal conditioning circuitry in a Class I Div 2 hazardous location PLC. IC Role / Device Role / Timing Role: Precision timing-critical decoder synchronizing multiplexer control signals with isolated ADC sampling clock. Use Value: Delivers <100 ps skew between Y outputs, ensuring simultaneous sampling of 16 channels within ±1 LSB error budget. |
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 |
|---|---|---|---|
| CD54HC154F3A | Wider VCC range (2–6 V), CMOS-input thresholds (VIH ≥ 1.5 V @ 2 V), higher ICC (160 µA max), no LSTTL compatibility | Suitable for mixed-voltage systems but incompatible with legacy TTL drivers | Select when interfacing with 3.3 V or variable-supply logic; avoid if driving 5 V TTL loads directly |
| SN54LS154J | Bipolar TTL technology, VCC = 5 V only, higher ICC (60 mA typ), slower propagation (35 ns min), no extended temp rating | Legacy drop-in for non-military designs; lacks -55°C to +125°C qualification and hermetic packaging | Use only in commercial-temp, cost-sensitive retrofits where radiation tolerance and thermal margin are not required |
Compared with CD54HC154F3A, the CD54HCT154F3A provides guaranteed LSTTL interoperability at the cost of narrower supply range; versus SN54LS154J, it delivers superior thermal resilience and lower static power but requires attention to CMOS input drive strength.
Availability
CD54HCT154F3A is available at Aetrix Electronics and suitable for avionics subsystems, military communications hardware, and ruggedized industrial control systems requiring stable component supply across extended temperature ranges and long product lifecycles.
Supply support for CD54HCT154F3A 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, with decades of heritage in military-qualified components.
The CD54HCT154F3A belongs to TI's CD54HCT logic family - engineered specifically for defense, aerospace, and critical infrastructure applications demanding QML-38535 certification, hermetic packaging, and guaranteed operation across extreme environmental conditions.
FAQ
What is the maximum operating frequency supported by CD54HCT154F3A?
The CD54HCT154F3A does not specify a maximum clock frequency, as it is a combinational logic device. Its usable switching rate is determined by propagation delay: with tPHL/tPLH ≤ 53 ns (max) at VCC = 4.5 V and CL = 50 pF, the CD54HCT154F3A supports reliable operation up to approximately 10–12 MHz in synchronous address decode applications, assuming adequate setup/hold timing margins.
Is CD54HCT154F3A pin-compatible with CD74HCT154M96?
No, CD54HCT154F3A is not pin-compatible with CD74HCT154M96. The CD54HCT154F3A uses a 24-lead CERDIP (J) package with 0.100" lead pitch, while CD74HCT154M96 uses a 24-lead SOIC (DW) package with 0.025" pitch and different pin 1 orientation. Physical mounting, soldering profile, and PCB layout are incompatible between these packages.
Does CD54HCT154F3A require external pull-up resistors on its outputs?
No, CD54HCT154F3A does not require external pull-up resistors. Its outputs are active-pull to VCC or GND (totem-pole), capable of sourcing/sinking ±25 mA per pin. Pull-ups are unnecessary unless open-drain emulation or wired-OR logic is explicitly implemented - which is not supported by the CD54HCT154F3A's output structure.
What is the meaning of "F3A" in CD54HCT154F3A?
The "F3A" suffix in CD54HCT154F3A denotes Texas Instruments' internal package and processing variant: "F" indicates CERDIP (J) package, "3" specifies tube packaging (15 units per tube), and "A" identifies the revision level per TI's military product coding system. This suffix confirms QML-38535 Class V qualification and hermetic seal verification.
Can CD54HCT154F3A be used in place of CD54HC154F3A in an existing design?
CD54HCT154F3A can replace CD54HC154F3A only if the system uses 5 V LSTTL-compatible inputs and does not require operation below 4.5 V. The CD54HCT154F3A has stricter input thresholds (VIH ≥ 2.0 V, VIL ≤ 0.8 V) and narrower supply range (4.5–5.5 V), whereas CD54HC154F3A operates from 2–6 V with CMOS thresholds. Swapping requires validation of input drive strength and supply stability.
CD54HCT154F3A Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- 54HCT
- 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:
- 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-CDIP
CD54HCT154F3A FAQ
1.How can I place an order for CD54HCT154F3A through Aetrix?
Please submit a Request for Quotation (RFQ) for CD54HCT154F3A 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 CD54HCT154F3A reliable?
The price and inventory of CD54HCT154F3A are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for CD54HCT154F3A is usually 5 days.
3.What payment methods are accepted for CD54HCT154F3A?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for CD54HCT154F3A transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for CD54HCT154F3A?
CD54HCT154F3A orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your CD54HCT154F3A 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 CD54HCT154F3A?
For technical support, including CD54HCT154F3A datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your CD54HCT154F3A requirements.
6.How does Aetrix verify that CD54HCT154F3A is sourced from the original manufacturer or authorized distributors?
All CD54HCT154F3A 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 CD54HCT154F3A meets industry standards.
7.What is the process for return or replacement of CD54HCT154F3A?
All CD54HCT154F3A units undergo pre-shipment inspection (PSI). If there is an issue with CD54HCT154F3A, 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 CD54HCT154F3A part is unused and in its original packaging.
Return procedure for CD54HCT154F3A:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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