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Texas Instruments CD54ACT257F3A
- Part No.:
- CD54ACT257F3A
- Manufacturer:
- Texas Instruments
- Category:
- Signal Switches, Multiplexers, Decoders
- Package:
- -
- Datasheet:
-
CD54ACT257F3A.pdf
- Description:
- CD54ACT257 QUAD NON-INVERTING 2-
- Quantity:
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Inventory:1,074
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Product details
Overview
CD54ACT257F3A from Texas Instruments is a quad 2-input multiplexer with non-inverting three-state outputs, designed for high-reliability military and aerospace applications. It operates over -55°C to +125°C, delivers ±24mA output drive, exhibits 4.4ns typical propagation delay at 5V/25°C/50pF, and features SCR-latchup-resistant CMOS technology. It is commonly used in data routing between dual register banks in hardened digital control systems.
For engineers reviewing the CD54ACT257F3A datasheet, CD54ACT257F3A pinout, CD54ACT257F3A application, or CD54ACT257F3A equivalent, key selection criteria include its CERDIP-16 package, 5V-only ACT logic compatibility, three-state enable timing (tPLZ/tPHZ), ESD immunity (>2kV), and operation across extended temperature extremes.
Technical Context
The CD54ACT257F3A implements four independent 2:1 multiplexers sharing one common select (S) and active-low output enable (OE) control. Each channel routes either I0 or I1 to Y based on S, with all outputs entering high-impedance state when OE is HIGH - enabling bus-sharing without external gating.
It uses Advanced CMOS Logic with TTL-compatible input thresholds (VIH = 2.0V min, VIL = 0.8V max at VCC = 4.5–5.5V) and supports 50Ω transmission line driving. Its propagation delays are characterized across -55°C to +125°C, with worst-case tPLH/tPHL ≤ 10.7ns and tPLZ/tPHZ ≤ 16.1ns at 5V.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Logic Family | ACT (Advanced CMOS, 5V-only, TTL-compatible inputs) |
| Supply Voltage Range | 4.5V to 5.5V - ensures stable operation under rail droop in avionics power domains |
| Propagation Delay (In→Y) | ≤10.7ns max at -55°C to +125°C - enables sub-100MHz data switching in real-time control loops |
| Output Drive | ±24mA - directly drives 15 FAST™ ICs or 50Ω transmission lines without buffers |
| ESD Protection | >2kV per MIL-STD-883 Method 3015 - meets ruggedized handling requirements for field-deployable systems |
| Operating Temperature | -55°C to +125°C - qualified for military-grade environmental stress screening (MIL-PRF-38535) |
| Three-State Leakage | ±10µA max at -55°C to +125°C - prevents bus contention during hot-swap or partial-power-down states |
Pinout & Package
CD54ACT257F3A is housed in a 16-lead Ceramic Dual In-line Package (CERDIP, package drawing J), hermetically sealed for moisture resistance and long-term reliability in harsh environments. The package measures 24.2mm × 7.62mm × 4.45mm (L×W×H) and features tin-lead (SnPb) leads per legacy military specification.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | S (Select) | Common control input determining source (I0 or I1) for all four multiplexers |
| 2–3, 5–6, 10–11, 13–14 | I0/I1 (Data Inputs) | Eight total inputs: two per channel (1I0/1I1 through 4I0/4I1) |
| 4, 7, 12, 15 | Y (Outputs) | Four non-inverting three-state outputs (1Y–4Y), disabled when OE = HIGH |
| 8 | GND | Ground reference for logic and power return |
| 16 | VCC | Positive supply terminal (4.5V–5.5V) |
| 9 | OE (Output Enable) | Active-low global enable controlling high-impedance state of all Y outputs |
Key Features
| Feature | Design Value |
|---|---|
| SCR-latchup-resistant process | Prevents destructive latchup under transient overvoltage or ionizing radiation exposure |
| Balanced propagation delays | Ensures deterministic timing skew <1ns between channels - critical for synchronized data capture |
| Buffered inputs | Reduces capacitive loading on upstream drivers and improves noise margin at high fanout |
| Three-state outputs with fast disable | tPZH/tPZL ≤16.1ns max - minimizes bus turnaround time in time-multiplexed architectures |
| 50Ω transmission line drive | Validated at 75Ω load up to +125°C - supports impedance-controlled routing on PCBs without termination resistors |
Applications
| Avionics Flight Control Unit | Military Radar Signal Processor |
|---|---|
Use Scenario: Routing sensor data from redundant ADC channels to a single DSP core under fault-tolerant arbitration logic. IC Role / Device Role / Timing Role: Quad 2:1 mux selects primary or backup analog input path per channel; OE synchronized to health monitor signal. Use Value: Enables seamless failover with <11ns channel-to-channel skew and guaranteed operation at -55°C during cold-soak startup. |
Use Scenario: Time-division multiplexing of digitized IF samples from multiple receiver chains onto a shared high-speed serial link. IC Role / Device Role / Timing Role: Data selector controlled by FPGA-generated S/OE signals; provides glitch-free bus isolation during reconfiguration. Use Value: ±24mA drive sustains signal integrity across 15cm backplane traces; 2kV ESD rating protects against static discharge in maintenance environments. |
| Spacecraft Onboard Computer | Tactical Radio Transceiver |
Use Scenario: Configurable I/O mapping between processor GPIO banks and peripheral modules (e.g., memory, crypto engine, telemetry). IC Role / Device Role / Timing Role: Level-shifting and bus-isolation element interfacing 5V peripherals to mixed-voltage SoC domains. Use Value: CERDIP packaging ensures hermeticity and radiation tolerance; 150°C max junction temperature supports passive thermal design in vacuum. |
Use Scenario: Dynamic antenna port selection and RF front-end calibration path switching in software-defined radios. IC Role / Device Role / Timing Role: High-speed signal routing element controlled by baseband processor; OE used for RF mute sequencing. Use Value: Sub-11ns propagation delay enables precise timing alignment of calibration waveforms; low VOL (≤0.5V) ensures clean logic thresholds under battery droop. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar quad 2-input multiplexer applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| CD74ACT257M | SOIC-16 package, commercial/military temp range (-55°C to +125°C), RoHS-compliant NiPdAu finish | Not hermetically sealed; unsuitable for high-humidity or vacuum environments | Select when cost, volume production, or PCB assembly compatibility outweighs need for CERDIP ruggedness |
| CD54AC257F3A | AC-family variant: wider VCC range (1.5V–5.5V), lower drive (±24mA still supported), higher propagation delay (≤13.4ns) | Compatible with mixed-supply systems but lacks ACT's strict 5V TTL interface compatibility | Select when operating below 4.5V or requiring broader voltage flexibility in hybrid logic designs |
Compared with CD74ACT257M and CD54AC257F3A, the CD54ACT257F3A uniquely combines hermetic CERDIP packaging, guaranteed 5V ACT performance, and full MIL-PRF-38535 qualification - making it the only choice for flight-critical or space-qualified deployments where package integrity and extreme-temperature timing stability are non-negotiable.
Availability
CD54ACT257F3A is available at Aetrix Electronics and suitable for avionics, defense electronics, and space-systems applications requiring stable component supply across extended temperature ranges and long product lifecycles.
Supply support for CD54ACT257F3A 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, and defense markets.
The CD54ACT257F3A belongs to TI's military-grade Advanced CMOS Logic family, engineered specifically for mission-critical systems demanding radiation-hardened-by-process, extended-temperature operation, and long-term obsolescence mitigation.
FAQ
What is the maximum operating temperature range for CD54ACT257F3A?
The CD54ACT257F3A is rated for continuous operation from -55°C to +125°C ambient temperature, validated per MIL-PRF-38535 requirements. This range applies to both electrical performance and package integrity, with junction temperature limited to 150°C. The CERDIP package ensures thermal stability and hermetic sealing across this full span, making CD54ACT257F3A suitable for deployment in jet engines, satellite payloads, and ground-mobile military platforms.
Does CD54ACT257F3A support 3.3V logic interfaces?
No, CD54ACT257F3A does not support 3.3V operation. Its ACT-family specification mandates a minimum VCC of 4.5V and maximum of 5.5V. Input thresholds (VIH ≥ 2.0V, VIL ≤ 0.8V) and output drive characteristics are optimized for 5V TTL compatibility. Interfacing with 3.3V systems requires level translation; using CD54ACT257F3A at 3.3V violates datasheet limits and risks functional failure or accelerated wear-out.
How many output pins does CD54ACT257F3A have, and what is their function?
CD54ACT257F3A has four output pins: 1Y (pin 4), 2Y (pin 7), 3Y (pin 12), and 4Y (pin 15). Each is a non-inverting, three-state output corresponding to one of the four internal 2:1 multiplexers. All outputs enter high-impedance state simultaneously when OE (pin 9) is driven HIGH, enabling shared bus architectures. Each output sources or sinks up to ±24mA, supporting direct connection to transmission lines or downstream logic loads.
Is CD54ACT257F3A pin-compatible with CD74ACT257E?
Yes, CD54ACT257F3A is pin-compatible with CD74ACT257E - both use identical 16-pin dual-in-line footprints (CERDIP J vs. PDIP N) and share identical pin functions and ordering (S, I0/I1, Y, OE, VCC, GND). However, the packages differ mechanically: CD54ACT257F3A uses hermetic ceramic, while CD74ACT257E uses plastic. PCB layout must account for package outline and thermal pad requirements, but signal routing and netlist remain identical.
What is the purpose of the Output Enable (OE) pin on CD54ACT257F3A?
The OE (Output Enable) pin (pin 9) on CD54ACT257F3A is an active-low control that places all four Y outputs into high-impedance state when asserted HIGH. When OE is LOW, outputs respond normally to S and data inputs. This enables bus arbitration, power sequencing, and dynamic reconfiguration - for example, disabling outputs during system reset or isolating faulty subsystems. Propagation delay from OE to Y (tPLZ/tPHZ) is ≤16.1ns max across temperature, ensuring rapid bus release.
CD54ACT257F3A Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- *
- Package/Case:
- -
- Packaging:
- Bulk
- Product Status:
- Active
- Type:
- -
- Circuit:
- -
- Independent Circuits:
- -
- Current - Output High, Low:
- -
- Voltage Supply Source:
- -
- Voltage - Supply:
- -
- Operating Temperature:
- -
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- -
- Supplier Device Package:
- -
CD54ACT257F3A FAQ
1.How can I place an order for CD54ACT257F3A through Aetrix?
Please submit a Request for Quotation (RFQ) for CD54ACT257F3A 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 CD54ACT257F3A reliable?
The price and inventory of CD54ACT257F3A are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for CD54ACT257F3A is usually 5 days.
3.What payment methods are accepted for CD54ACT257F3A?
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4.How is shipping managed for CD54ACT257F3A?
CD54ACT257F3A orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your CD54ACT257F3A 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 CD54ACT257F3A?
For technical support, including CD54ACT257F3A datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your CD54ACT257F3A requirements.
6.How does Aetrix verify that CD54ACT257F3A is sourced from the original manufacturer or authorized distributors?
All CD54ACT257F3A 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 CD54ACT257F3A meets industry standards.
7.What is the process for return or replacement of CD54ACT257F3A?
All CD54ACT257F3A units undergo pre-shipment inspection (PSI). If there is an issue with CD54ACT257F3A, 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 CD54ACT257F3A part is unused and in its original packaging.
Return procedure for CD54ACT257F3A:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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