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Texas Instruments SN74LVC157AWBQBRQ1
- Part No.:
- SN74LVC157AWBQBRQ1
- Manufacturer:
- Texas Instruments
- Category:
- Signal Switches, Multiplexers, Decoders
- Package:
- 16-WFQFN Exposed Pad
- Datasheet:
-
SN74LVC157AWBQBRQ1.pdf
- Description:
- AUTOMOTIVE QUADRUPLE 2-LINE-TO-1
- Quantity:
- Payment:
- Shipping:
Inventory:1,426
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Product details
Overview
SN74LVC157AWBQBRQ1 from Texas Instruments is an automotive-qualified quadruple 2-line to 1-line data selector/multiplexer in a 16-pin WQFN (BQB) package, operating from 2 V to 3.6 V with 5.4 ns max propagation delay at 3.3 V and 5.5 V-tolerant inputs. It functions as a high-speed digital signal routing IC in vehicle body control modules, ADAS sensor interfaces, and infotainment data switching.
For engineers reviewing the SN74LVC157AWBQBRQ1 datasheet, SN74LVC157AWBQBRQ1 pinout, SN74LVC157AWBQBRQ1 application, or SN74LVC157AWBQBRQ1 equivalent, key selection criteria include its AEC-Q100 Grade 1 qualification (-40°C to +125°C), output strobe (G) control logic, true-data routing behavior, and compatibility with mixed 3.3 V/5 V logic systems.
Technical Context
The SN74LVC157AWBQBRQ1 implements four independent 2:1 multiplexers sharing a common active-low output strobe (G) and address select (A/B) input. When G is high, all four Y outputs are forced low regardless of A/B or data inputs; when G is low, each Y output selects either its corresponding A or B input based on the A/B state.
Its CMOS LVC process enables 5.5 V-tolerant inputs while powered from 2–3.6 V, supporting level translation between legacy 5 V subsystems and modern 3.3 V microcontrollers. The device features ground bounce (VOLP) < 0.8 V and output undershoot (VOHV) > 2 V at VCC = 3.3 V, ensuring signal integrity in noisy automotive environments.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage Range | 2 V to 3.6 V - Enables direct integration into 3.3 V automotive power domains without level-shifting circuitry. |
| Input Voltage Tolerance | Up to 5.5 V - Allows safe interfacing with 5 V sensors or legacy controllers without external clamping. |
| Max Propagation Delay | 5.4 ns at 3.3 V - Supports high-speed data routing in real-time vehicle networks (e.g., LIN gateway arbitration). |
| Operating Temperature | –40°C to +125°C - Meets AEC-Q100 Grade 1 requirements for under-hood and cabin-mounted ECUs. |
| ESD Rating (HBM) | ±2000 V - Exceeds MIL-STD-883 Method 3015 for robustness against assembly and field electrostatic events. |
| Output Drive Strength | ±24 mA at 3 V - Sufficient to drive multiple CMOS loads or short PCB traces without buffering. |
| Power Dissipation Cap | 16 pF typical - Low dynamic power consumption supports energy-efficient designs in always-on modules. |
Pinout & Package
SN74LVC157AWBQBRQ1 uses a 3.5 mm × 2.5 mm, 0.5 mm pitch, 16-pin WQFN (BQB) package with exposed thermal pad. The pad must be soldered to PCB ground for optimal thermal performance and mechanical reliability per TI SLUA271 guidelines.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| G | Active-low output strobe | Global enable: forces all Y outputs low when high; required for synchronized channel disable in safety-critical paths. |
| A/B | Address select | Single control line determining whether all four Y outputs route from A-inputs (A/B = low) or B-inputs (A/B = high). |
| 1A–4A, 1B–4B | Data inputs | Eight independent CMOS-compatible inputs accepting 0–5.5 V; no external pull-ups needed for 3.3 V logic levels. |
| 1Y–4Y | Data outputs | Four true (non-inverted) outputs with rail-to-rail swing; capable of driving 24 mA loads directly. |
| VCC | Positive supply | Single 2–3.6 V supply pin; requires local 0.1 µF bypass capacitor placed adjacent to pin 16. |
| GND | Ground reference | Common return for all signals and power; connects to thermal pad for enhanced heat dissipation. |
| Thermal Pad | Exposed metal pad | Must be soldered to PCB ground plane; improves thermal resistance (RθJA = 98.8°C/W) and mechanical mounting stability. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q100 qualified | Grade 1 certified for automotive use - eliminates need for additional qualification testing in Tier 1 ECU designs. |
| 5.5 V-tolerant inputs | Enables direct connection to 5 V analog front-ends or legacy microcontrollers without level shifters or resistive dividers. |
| Low propagation delay | 5.4 ns max at 3.3 V - meets timing budgets for fast-switching applications like camera sensor data aggregation. |
| Output ground bounce control | VOLP < 0.8 V at 3.3 V - reduces noise coupling into adjacent analog circuits (e.g., ADC references or CAN transceivers). |
| Common strobe architecture | Single G input synchronizes disable across all four channels - critical for deterministic fault response in ASIL-B systems. |
Applications
| Body Control Module (BCM) | ADAS Camera Interface |
|---|---|
Use Scenario: Routing sensor status signals (door open/close, seatbelt latch, trunk release) to MCU GPIOs under varying voltage domains. IC Role / Device Role / Timing Role: Data selector enabling one MCU port to monitor up to eight discrete inputs via time-multiplexed sampling. Use Value: Reduces MCU pin count by 50% while maintaining deterministic 5.4 ns latency for safety-critical door lock feedback loops. | Use Scenario: Switching between dual camera streams (front/rear) before feeding into image signal processor (ISP) input buffer. IC Role / Device Role / Timing Role: High-speed analog-adjacent digital mux providing glitch-free video path selection during vehicle reversing. Use Value: Eliminates need for separate level translators due to 5.5 V-tolerant inputs, simplifying layout near 5 V camera sensors. |
| Infotainment System Audio Switching | Electric Power Steering (EPS) Diagnostic Bus |
Use Scenario: Selecting between Bluetooth audio stream and auxiliary line-in source before DAC conversion in head unit. IC Role / Device Role / Timing Role: Quad 2:1 mux routing four stereo channels (L/R × 2 sources) with simultaneous A/B control. Use Value: Enables seamless audio source handover with sub-10 ns skew between left/right channels - preserving stereo imaging fidelity. | Use Scenario: Isolating diagnostic communication lines between EPS ECU and service tool during firmware update sequences. IC Role / Device Role / Timing Role: Strobe-gated multiplexer preventing unintended bus contention during flash programming mode transitions. Use Value: Guarantees zero-output-drive state (via G pin) during critical update windows - meeting ISO 14229 UDS security requirements. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar multiplexer applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SN74LVC157ADRQ1 | SOIC-16 package (9.9 mm × 6 mm); RθJA = 118.1°C/W; same electrical specs. | Preferred for prototyping or through-hole rework; less suitable for space-constrained ADAS modules. | Select when board-level testability or manual assembly is prioritized over footprint density. |
| SN74LVC157AQPWRQ1 | TSSOP-16 package (5.0 mm × 6.4 mm); RθJA = 150.8°C/W; identical logic function and voltage ratings. | Better suited for mid-density layouts where WQFN reflow capability is unavailable. | Choose when existing SMT lines lack WQFN placement accuracy or thermal profiling for fine-pitch QFNs. |
Compared with SN74LVC157ADRQ1 and SN74LVC157AQPWRQ1, SN74LVC157AWBQBRQ1 delivers the smallest footprint (3.5 × 2.5 mm) and lowest thermal resistance (98.8°C/W), making it optimal for thermally constrained automotive modules requiring AEC-Q100 compliance without sacrificing speed or voltage flexibility.
Availability
SN74LVC157AWBQBRQ1 is available at Aetrix Electronics and suitable for automotive body control, ADAS sensor aggregation, infotainment audio routing, and EPS diagnostic bus isolation requiring stable component supply across extended product lifecycles.
Supply support for SN74LVC157AWBQBRQ1 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 automotive-grade ICs with over 50 years of automotive qualification experience.
The SN74LVC157A-Q1 product line delivers AEC-Q100-compliant logic devices optimized for signal routing, level translation, and deterministic control in harsh-temperature automotive subsystems.
FAQ
What is the maximum operating temperature range for SN74LVC157AWBQBRQ1?
SN74LVC157AWBQBRQ1 is rated for –40°C to +125°C ambient operation, satisfying AEC-Q100 Grade 1 requirements for under-hood and cabin-mounted automotive electronics. This range is validated across all electrical parameters including propagation delay, output drive, and input thresholds - no derating is required within this span.
Does SN74LVC157AWBQBRQ1 require external pull-up or pull-down resistors on unused inputs?
Yes - all unused inputs of SN74LVC157AWBQBRQ1 must be tied to VCC or GND to prevent floating states that cause increased ICC, undefined outputs, or EMI. TI's application report SCBA004 specifies this requirement; leaving inputs unconnected risks erratic behavior in automotive environments with wide voltage transients.
Can SN74LVC157AWBQBRQ1 interface directly with 5 V logic outputs?
Yes - SN74LVC157AWBQBRQ1 accepts input voltages up to 5.5 V while powered from 2–3.6 V, enabling direct connection to 5 V microcontrollers or sensors without external level-shifting components. This is confirmed in Section 4.3 of the datasheet under "VI Input voltage" with a 0–5.5 V rating.
What is the purpose of the thermal pad on SN74LVC157AWBQBRQ1?
The exposed thermal pad on SN74LVC157AWBQBRQ1 must be soldered to a PCB ground plane to achieve its specified 98.8°C/W junction-to-ambient thermal resistance. Leaving it unconnected degrades thermal performance by >30% and compromises long-term reliability in sustained 125°C operation - per TI SLUA271 layout guidance.
How does the G (strobe) pin affect output behavior in SN74LVC157AWBQBRQ1?
When G is high, SN74LVC157AWBQBRQ1 forces all four Y outputs low regardless of A/B or data inputs - a hard disable function used for fail-safe channel isolation. When G is low, outputs follow the A/B-select logic. This behavior is defined in the Function Table (Section 6.3) and enables deterministic fault containment in ASIL-B systems.
SN74LVC157AWBQBRQ1 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- 74LVC
- Package/Case:
- 16-WFQFN Exposed Pad
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Type:
- Data Selector/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:
- Automotive
- Qualification:
- AEC-Q100
- Mounting Type:
- Surface Mount, Wettable Flank
- Supplier Device Package:
- 16-WQFN (2.5x3.5)
SN74LVC157AWBQBRQ1 FAQ
1.How can I place an order for SN74LVC157AWBQBRQ1 through Aetrix?
Please submit a Request for Quotation (RFQ) for SN74LVC157AWBQBRQ1 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 SN74LVC157AWBQBRQ1 reliable?
The price and inventory of SN74LVC157AWBQBRQ1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SN74LVC157AWBQBRQ1 is usually 5 days.
3.What payment methods are accepted for SN74LVC157AWBQBRQ1?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SN74LVC157AWBQBRQ1 transactions.
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4.How is shipping managed for SN74LVC157AWBQBRQ1?
SN74LVC157AWBQBRQ1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SN74LVC157AWBQBRQ1 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 SN74LVC157AWBQBRQ1?
For technical support, including SN74LVC157AWBQBRQ1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SN74LVC157AWBQBRQ1 requirements.
6.How does Aetrix verify that SN74LVC157AWBQBRQ1 is sourced from the original manufacturer or authorized distributors?
All SN74LVC157AWBQBRQ1 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 SN74LVC157AWBQBRQ1 meets industry standards.
7.What is the process for return or replacement of SN74LVC157AWBQBRQ1?
All SN74LVC157AWBQBRQ1 units undergo pre-shipment inspection (PSI). If there is an issue with SN74LVC157AWBQBRQ1, 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 SN74LVC157AWBQBRQ1 part is unused and in its original packaging.
Return procedure for SN74LVC157AWBQBRQ1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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