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Texas Instruments SN74LVC157AQPWREP
- Part No.:
- SN74LVC157AQPWREP
- Manufacturer:
- Texas Instruments
- Category:
- Signal Switches, Multiplexers, Decoders
- Package:
- 16-TSSOP (0.173", 4.40mm Width)
- Datasheet:
-
SN74LVC157AQPWREP.pdf
- Description:
- IC MULTIPLEXER 4 X 2:1 16TSSOP
- Quantity:
- Payment:
- Shipping:
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Product details
Overview
SN74LVC157AQPWREP from Texas Instruments is a radiation-hardened, extended-temperature quadruple 2-line to 1-line data selector/multiplexer IC operating from 2 V to 3.6 V, with 5.4 ns max propagation delay at 3.3 V, 5.5 V-tolerant inputs, and −40°C to 125°C operation-used in avionics data routing and FPGA I/O expansion.
For engineers reviewing the SN74LVC157AQPWREP datasheet, SN74LVC157AQPWREP pinout, SN74LVC157AQPWREP application, or SN74LVC157AQPWREP equivalent, key selection considerations include voltage translation capability (3.3 V/5 V mixed-system compatibility), guaranteed low ground bounce (<0.8 V) and undershoot (>2 V) at 3.3 V, and TSSOP-16 packaging for high-density board layouts.
Technical Context
This device implements four independent 2:1 multiplexers sharing a common active-low strobe (G) and select (A/B) control. When G is high, all Y outputs are forced low regardless of A/B or data inputs; when G is low, the A/B signal selects between two parallel 4-bit input buses (1A–4A vs. 1B–4B) to drive corresponding true outputs (1Y–4Y).
It uses LVC-series CMOS logic with TTL-compatible input thresholds, supports hot-swap capable inputs (VI up to 5.5 V while VCC = 2–3.6 V), and meets enhanced product qualification per JEDEC standards including HAST, temperature cycling, and bond intermetallic life testing for space-grade reliability.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCC Range | 2 V to 3.6 V - Enables direct interface with 2.5 V and 3.3 V logic domains without level shifters. |
| Input Voltage Tolerance | Up to 5.5 V - Allows safe connection to legacy 5 V drivers in mixed-voltage systems. |
| Max Propagation Delay | 5.4 ns at VCC = 3.3 V - Supports >100 MHz data switching in timing-critical routing paths. |
| Output Drive Strength | ±24 mA at VCC = 3 V - Sufficient to drive multiple LVC/LVT inputs or short PCB traces without buffering. |
| Operating Temperature | −40°C to 125°C - Qualified for engine-control units, satellite payload interfaces, and downhole instrumentation. |
| ESD Protection | >2000 V HBM, >200 V MM - Reduces risk of handling damage during assembly and field maintenance. |
| Power Dissipation Cap | 16 pF typical Cpd at 3.3 V - Predictable dynamic power consumption for thermal modeling in sealed enclosures. |
Pinout & Package
TSSOP-16 package (PW), 4.4 mm × 5.0 mm body, 0.65 mm pitch, exposed pad not present, RoHS-compliant NiPdAu lead finish, MSL Level-1.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (A/B) | Common select control | Determines whether A-inputs (low) or B-inputs (high) are routed to outputs; shared across all four channels. |
| 2–5 (1A–4A) | Data input group A | First 4-bit source bus; each connects to corresponding Y output when A/B = low. |
| 6–9 (1B–4B) | Data input group B | Second 4-bit source bus; each connects to corresponding Y output when A/B = high. |
| 10 (G) | Active-low enable/strobe | Overrides A/B; forces all Y outputs low when high - enables global disable for bus arbitration. |
| 11–14 (1Y–4Y) | True multiplexer outputs | 4-bit routed output bus; no inversion; driven only when G = low and A/B selects valid source. |
| 15 (GND) | Ground reference | Primary return path for all I/O and internal logic; must be low-impedance for noise immunity. |
| 16 (VCC) | Supply rail | Single 2–3.6 V supply powers entire logic array and I/O buffers; decoupling required within 10 mm. |
Key Features
| Feature | Design Value |
|---|---|
| Voltage translation capability | Accepts 5 V inputs while powered from 2.7–3.6 V - eliminates external level shifters in mixed-supply backplanes. |
| Controlled output switching | Guaranteed <0.8 V ground bounce and >2 V VOH undershoot at 3.3 V - prevents false triggering in adjacent high-speed logic. |
| Extended-temperature qualification | JEDEC-qualified for −40°C to 125°C with HAST, temperature cycle, and electromigration testing - suitable for uncooled aerospace modules. |
| Low static current | 10 µA max ICC at VCC = 3.6 V - reduces quiescent power in always-on telemetry subsystems. |
| Hot-swap tolerant inputs | No damage or latch-up when VI = 0 V to 5.5 V under any VCC condition - supports live insertion in modular avionics racks. |
Applications
| Avionics Data Bus Multiplexing | FPGA I/O Expansion Interface |
|---|---|
Use Scenario: Routing sensor telemetry (pressure, temp, IMU) from dual-redundant ADC banks to a single flight computer interface under DO-254 constraints. IC Role / Device Role / Timing Role: Quad 2:1 mux provides fail-operational data path selection with G-strobe enabling synchronized switchover. Use Value: Eliminates discrete analog switches and associated timing skew; 5.4 ns tpd ensures sub-cycle alignment with 100 MHz FPGA clock domains. | Use Scenario: Expanding limited FPGA GPIO count to manage 8-channel SPI peripherals (ADCs, DACs, EEPROMs) in a compact UAV controller. IC Role / Device Role / Timing Role: Acts as programmable I/O concentrator - A/B selects between two peripheral groups; G enables/disables entire bank. Use Value: Reduces FPGA pin usage by 50% versus direct connection; 5.5 V-tolerant inputs allow interfacing with industrial SPI slaves lacking 3.3 V compliance. |
| Satellite Onboard Computer Interfacing | Automotive Engine Control Unit (ECU) Signal Conditioning |
Use Scenario: Isolating and selecting between primary and backup CAN transceiver status signals before feeding into radiation-hardened microcontroller GPIOs. IC Role / Device Role / Timing Role: Signal routing element in fault-tolerant monitoring chain; operates in full radiation-hardened environment (−40°C to 125°C). Use Value: Meets ESA ECSS-Q-ST-60-13C Class 1 reliability requirements; no derating needed up to 125°C ambient. | Use Scenario: Consolidating throttle position, camshaft, and crankshaft sensor signals from legacy 5 V analog front-ends into a modern 3.3 V MCU ADC subsystem. IC Role / Device Role / Timing Role: Voltage-level translating multiplexer enabling drop-in replacement of aging discrete solutions in ECU redesigns. Use Value: Maintains existing 5 V sensor harnesses while meeting ASIL-B functional safety timing budgets via guaranteed 5.4 ns propagation. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar multiplexer applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SN74LVC157APWRE | Commercial-grade version (−40°C to 85°C), same pinout and electrical specs except temperature range and qualification pedigree. | Lacks extended-temperature qualification and DMS support; unsuitable for space or military deployments. | Select SN74LVC157APWRE only for cost-sensitive terrestrial industrial designs where 125°C operation is unnecessary. |
| SN74LVCH157AQPWREP | Includes bus-hold circuitry on all inputs; otherwise identical pinout, voltage range, and timing. | Eliminates need for external pull-up/down resistors on floating inputs - reduces BOM count in low-pin-count MCU interfaces. | Choose SN74LVCH157AQPWREP when system-level input stability cannot be guaranteed and board space is constrained. |
Compared with SN74LVC157APWRE and SN74LVCH157AQPWREP, the SN74LVC157AQPWREP uniquely delivers full QML-qualified extended-temperature operation with zero bus-hold overhead - making it the sole choice for radiation-tolerant, high-reliability multiplexing where thermal margin and long-term supply continuity are mandatory.
Availability
SN74LVC157AQPWREP is available at Aetrix Electronics and suitable for avionics data routing, FPGA I/O expansion, and automotive ECU signal conditioning requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for SN74LVC157AQPWREP 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 U.S.-based semiconductor company specializing in analog, embedded processing, and high-reliability logic solutions for aerospace, automotive, and industrial markets.
The SN74LVC157A-EP product line delivers enhanced-product (EP) logic ICs engineered for mission-critical systems demanding extended temperature operation, controlled baseline manufacturing, and diminishing manufacturing sources (DMS) mitigation.
FAQ
What is the maximum input voltage rating for SN74LVC157AQPWREP?
The SN74LVC157AQPWREP supports input voltages up to 5.5 V regardless of VCC level - a key feature enabling safe interfacing with 5 V legacy components in mixed-voltage systems. This tolerance is specified across the full operating temperature range (−40°C to 125°C) and does not require external clamping diodes. The absolute maximum rating is 6.5 V, but sustained operation above 5.5 V is not recommended per TI's recommended operating conditions.
Does SN74LVC157AQPWREP support hot-swap or live-insertion scenarios?
Yes, the SN74LVC157AQPWREP is designed for hot-swap compatibility: its inputs tolerate 0 V to 5.5 V under all VCC conditions (2 V to 3.6 V), and it exhibits no latch-up behavior per JEDEC JESD78 testing. This allows safe insertion into powered backplanes - critical for modular avionics and repairable vehicle ECUs. The device also features >200 V machine-model ESD protection, further enhancing robustness during handling and field replacement.
What is the function of the G (strobe) pin on SN74LVC157AQPWREP?
The G pin on SN74LVC157AQPWREP is an active-low enable/strobe that globally disables all four multiplexer outputs. When G is high, all Y outputs are forced low irrespective of A/B state or input values - providing deterministic bus isolation. When G is low, normal 2:1 selection resumes based on the A/B control signal. This feature enables synchronized data gating in fault-tolerant architectures and simplifies arbitration logic in multi-master systems.
How does SN74LVC157AQPWREP differ from the commercial SN74LVC157APWRE?
The SN74LVC157AQPWREP differs from SN74LVC157APWRE in three verified aspects: (1) extended temperature range (−40°C to 125°C vs. −40°C to 85°C), (2) enhanced product qualification including HAST, temperature cycling, and electromigration testing, and (3) controlled baseline manufacturing with single assembly/test site and DMS support. All electrical parameters, pinout, and package are identical - making SN74LVC157AQPWREP a drop-in upgrade for high-reliability deployments.
Is SN74LVC157AQPWREP pin-compatible with other TI multiplexers like SN74LS157 or SN74HC157?
No, SN74LVC157AQPWREP is not pin-compatible with SN74LS157 (TTL, 16-pin PDIP/SOIC) or SN74HC157 (high-speed CMOS, same pinout but different VCC range and drive strength). While all share the same logic function and 16-pin TSSOP footprint, SN74LVC157AQPWREP requires strict adherence to 2–3.6 V VCC and exhibits 5.5 V-tolerant inputs - unlike LS (4.75–5.25 V) or HC (2–6 V) variants. Direct substitution without voltage and timing validation will cause functional failure.
SN74LVC157AQPWREP 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:
- -40°C ~ 125°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 16-TSSOP
SN74LVC157AQPWREP FAQ
1.How can I place an order for SN74LVC157AQPWREP through Aetrix?
Please submit a Request for Quotation (RFQ) for SN74LVC157AQPWREP 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 SN74LVC157AQPWREP reliable?
The price and inventory of SN74LVC157AQPWREP are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SN74LVC157AQPWREP is usually 5 days.
3.What payment methods are accepted for SN74LVC157AQPWREP?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SN74LVC157AQPWREP transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SN74LVC157AQPWREP?
SN74LVC157AQPWREP orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SN74LVC157AQPWREP 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 SN74LVC157AQPWREP?
For technical support, including SN74LVC157AQPWREP datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SN74LVC157AQPWREP requirements.
6.How does Aetrix verify that SN74LVC157AQPWREP is sourced from the original manufacturer or authorized distributors?
All SN74LVC157AQPWREP 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 SN74LVC157AQPWREP meets industry standards.
7.What is the process for return or replacement of SN74LVC157AQPWREP?
All SN74LVC157AQPWREP units undergo pre-shipment inspection (PSI). If there is an issue with SN74LVC157AQPWREP, 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 SN74LVC157AQPWREP part is unused and in its original packaging.
Return procedure for SN74LVC157AQPWREP:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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