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Texas Instruments SN74LVC257AMPWREP
- Part No.:
- SN74LVC257AMPWREP
- Manufacturer:
- Texas Instruments
- Category:
- Signal Switches, Multiplexers, Decoders
- Package:
- 16-TSSOP (0.173", 4.40mm Width)
- Datasheet:
-
SN74LVC257AMPWREP.pdf
- Description:
- IC MULTIPLEXER 4 X 2:1 16TSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:1,960
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Product details
Overview
SN74LVC257AMPWREP from Texas Instruments is a radiation-hardened, extended-temperature quadruple 2-line to 1-line data selector/multiplexer with 3-state outputs, operating from 2 V to 3.6 V, supporting 5.5-V-tolerant inputs and delivering 4.6 ns max propagation delay at 3.3 V - used in high-reliability bus multiplexing for aerospace telemetry interfaces.
For engineers reviewing the SN74LVC257AMPWREP datasheet, SN74LVC257AMPWREP pinout, SN74LVC257AMPWREP application, or SN74LVC257AMPWREP equivalent, key selection criteria include its –55°C to 125°C operation, TSSOP-16 package, 3-state output control via OE, and mixed-voltage translation capability between 3.3-V and 5-V logic domains.
Technical Context
The SN74LVC257AMPWREP implements four independent 2:1 multiplexers sharing a common output-enable (OE) input, each selecting between A or B inputs based on the A/B select line. All outputs enter high-impedance state when OE is high, decoupling them from the bus.
It uses LVC-series CMOS technology with 5.5-V-tolerant inputs, enabling direct interfacing with legacy 5-V logic while powered from 2.7–3.6 V. Its output drive strength is ±24 mA at 3 V, with guaranteed VOH ≥ 2.2 V and VOL ≤ 0.55 V under full load.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCC Range | 2 V to 3.6 V - enables compatibility with low-voltage embedded systems and avoids overvoltage stress in 3.3-V rails. |
| Input Voltage Tolerance | Up to 5.5 V - allows safe connection to 5-V drivers without level-shifting circuitry in mixed-voltage systems. |
| Max Propagation Delay | 4.6 ns at 3.3 V - supports >200 MHz bus switching in time-critical data routing applications. |
| Output Drive | ±24 mA at 3 V - sufficient to drive standard TTL loads or multiple CMOS inputs without external buffers. |
| Operating Temperature | –55°C to 125°C - qualified for space-grade and military-grade environments per QML-V requirements. |
| 3-State Enable Logic | Active-low OE - simplifies system-level bus arbitration by allowing synchronous tri-state control across all four channels. |
| Power Dissipation Cap | 15.5 pF typical Cpd at 10 MHz - enables accurate dynamic power estimation in low-power portable or satellite subsystems. |
Pinout & Package
TSSOP-16 (PW) package, 4.4 mm × 5.0 mm body, 0.65 mm pitch, 1.2 mm max height, RoHS-compliant NIPDAU finish, MSL Level-1.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1A, 2A, 3A, 4A | Data Input A | First input of each 2:1 mux channel; tied to source A of corresponding data pair. |
| 1B, 2B, 3B, 4B | Data Input B | Second input of each 2:1 mux channel; tied to source B of corresponding data pair. |
| 1Y, 2Y, 3Y, 4Y | 3-State Output | Multiplexed output per channel; high-impedance when OE = high, otherwise passes selected A/B signal. |
| A/B | Channel Select | Global select line determining whether A or B inputs are routed to Y outputs across all four channels. |
| OE | Output Enable | Active-low enable controlling 3-state behavior of all four Y outputs simultaneously. |
| VCC | Supply | Positive supply rail (2–3.6 V); powers internal logic and output drivers. |
| GND | Ground | Reference return path for all signals and supply current. |
Key Features
| Feature | Design Value |
|---|---|
| Extended Temp Operation | –55°C to 125°C with full electrical performance validated - eliminates derating concerns in orbital thermal cycling. |
| 5.5-V-Tolerant Inputs | Accepts 5-V logic levels while powered from 2.7–3.6 V - enables seamless integration into legacy 5-V subsystems without translators. |
| Low Propagation Delay | 4.6 ns max tpd at 3.3 V - ensures deterministic timing in high-speed data acquisition backplanes. |
| Controlled Ground Bounce | Typical VOLP < 0.8 V at VCC = 3.3 V - reduces noise coupling into adjacent analog or RF sections on shared PCBs. |
| QML-V Qualified | Qualified per MIL-PRF-38535 Class V - meets radiation hardness, reliability, and traceability requirements for spaceflight electronics. |
Applications
| Avionics Data Bus Multiplexing | Satellite Telemetry Interface |
|---|---|
|
Use Scenario: Routing sensor data from redundant analog-to-digital converters onto a shared MIL-STD-1553 or SpaceWire bus. IC Role / Device Role / Timing Role: Quad 2:1 selector isolates primary/backup ADC streams and enables failover switching under command control. Use Value: Single SN74LVC257AMPWREP replaces discrete logic or FPGA resources, reducing gate count and radiation-sensitive logic area. |
Use Scenario: Consolidating housekeeping telemetry (voltage, temperature, status) from multiple subsystems onto downlink payload interface. IC Role / Device Role / Timing Role: 3-state outputs allow time-multiplexed sharing of serial telemetry lines without contention. Use Value: Guaranteed –55°C to 125°C operation ensures uninterrupted telemetry during orbital eclipse and solar exposure phases. |
| Launch Vehicle Control Logic | Radiation-Hardened Test Equipment |
|
Use Scenario: Selecting between flight computer and ground test mode signals during pre-launch checkout and ascent phase. IC Role / Device Role / Timing Role: A/B select + OE enable provides dual-layer control for deterministic signal routing and isolation. Use Value: 5.5-V-tolerant inputs accept test equipment's 5-V control signals while operating from vehicle's 3.3-V supply. |
Use Scenario: Building reconfigurable signal injection paths in radiation-effects test benches for IC qualification. IC Role / Device Role / Timing Role: Four independent muxes route calibrated stimulus signals to DUT pins under software-defined sequencing. Use Value: QML-V pedigree ensures SN74LVC257AMPWREP itself does not become a failure point during high-dose irradiation testing. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar data selector/multiplexer applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SN74LVC257AQPWREP | Same functionality and pinout, but rated for –40°C to 125°C (not –55°C). | Approved for commercial/aerospace non-flight applications; lacks QML-V qualification. | Select when full space-grade temp range and radiation pedigree are not required. |
| SN54LVC257A | Military-spec version with identical electrical specs; packaged in CDIP or CERDIP. | Used in legacy defense platforms requiring through-hole mounting and MIL-STD-883 screening. | Choose only if board layout mandates through-hole packaging or specific military test documentation. |
Compared with SN74LVC257AQPWREP and SN54LVC257A, the SN74LVC257AMPWREP uniquely combines TSSOP-16 surface-mount form factor, –55°C start-up capability, and QML-V qualification - making it the sole option for new radiation-tolerant, miniaturized space payloads requiring extended cold-start operation.
Availability
SN74LVC257AMPWREP is available at Aetrix Electronics and suitable for avionics data routing, satellite telemetry consolidation, and launch vehicle control logic requiring stable component supply across long-duration programs.
Supply support for SN74LVC257AMPWREP 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 space-qualified components.
The SN74LVC257AMPWREP belongs to TI's enhanced-product (EP) logic family, designed specifically for high-reliability applications demanding extended temperature operation, radiation tolerance, and long-term supply assurance.
FAQ
What is the operating temperature range of the SN74LVC257AMPWREP?
The SN74LVC257AMPWREP is specified for continuous operation from –55°C to 125°C, with full electrical performance validated across this range per QML-V requirements. This makes SN74LVC257AMPWREP suitable for deep-space missions, high-altitude UAVs, and cryogenic launch environments where standard industrial parts would fail to initialize or maintain timing margins.
Does the SN74LVC257AMPWREP support 5-V input signals while powered from 3.3 V?
Yes, the SN74LVC257AMPWREP accepts input voltages up to 5.5 V regardless of VCC level (2–3.6 V), enabling direct interfacing with 5-V microcontrollers or legacy peripherals without external level shifters. This feature is intrinsic to the device's input structure and is fully characterized in the datasheet - a key advantage of SN74LVC257AMPWREP in mixed-voltage system design.
Is the SN74LVC257AMPWREP pin-compatible with standard SN74LVC257A variants?
Yes, SN74LVC257AMPWREP uses the same TSSOP-16 (PW) package and identical pinout as SN74LVC257AQPWREP and commercial SN74LVC257APW, including matching A/B, OE, VCC, GND, and I/O assignments. However, SN74LVC257AMPWREP adds QML-V qualification and extended temperature validation not present in those versions.
What is the maximum output drive capability of the SN74LVC257AMPWREP?
The SN74LVC257AMPWREP delivers ±24 mA output drive at VCC = 3 V, with VOL ≤ 0.55 V and VOH ≥ 2.2 V under that load. This allows direct driving of multiple 74LVC inputs or standard TTL loads, reducing need for buffer stages - a verified specification for SN74LVC257AMPWREP under worst-case temperature and voltage conditions.
How does the OE pin function on the SN74LVC257AMPWREP?
The OE (output enable) pin on SN74LVC257AMPWREP is active-low: when high, all four Y outputs enter high-impedance state; when low, outputs reflect the selected A/B input per channel. To ensure defined state during power-up, TI recommends tying OE to VCC via a pullup resistor - a critical design detail confirmed in the SN74LVC257AMPWREP datasheet application guidance.
SN74LVC257AMPWREP Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- 74LVC
- Package/Case:
- 16-TSSOP (0.173", 4.40mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Type:
- Multiplexer
- Circuit:
- 4 x 2:1
- Independent Circuits:
- 1
- Current - Output High, Low:
- 24mA, 24mA
- Voltage Supply Source:
- Single Supply
- Voltage - Supply:
- 2V ~ 3.6V
- Operating Temperature:
- -55°C ~ 125°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 16-TSSOP
SN74LVC257AMPWREP FAQ
1.How can I place an order for SN74LVC257AMPWREP through Aetrix?
Please submit a Request for Quotation (RFQ) for SN74LVC257AMPWREP 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 SN74LVC257AMPWREP reliable?
The price and inventory of SN74LVC257AMPWREP are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SN74LVC257AMPWREP is usually 5 days.
3.What payment methods are accepted for SN74LVC257AMPWREP?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SN74LVC257AMPWREP transactions.
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4.How is shipping managed for SN74LVC257AMPWREP?
SN74LVC257AMPWREP orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SN74LVC257AMPWREP 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 SN74LVC257AMPWREP?
For technical support, including SN74LVC257AMPWREP datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SN74LVC257AMPWREP requirements.
6.How does Aetrix verify that SN74LVC257AMPWREP is sourced from the original manufacturer or authorized distributors?
All SN74LVC257AMPWREP 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 SN74LVC257AMPWREP meets industry standards.
7.What is the process for return or replacement of SN74LVC257AMPWREP?
All SN74LVC257AMPWREP units undergo pre-shipment inspection (PSI). If there is an issue with SN74LVC257AMPWREP, 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 SN74LVC257AMPWREP part is unused and in its original packaging.
Return procedure for SN74LVC257AMPWREP:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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