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Texas Instruments SN74LVC157AQPWRQ1
- Part No.:
- SN74LVC157AQPWRQ1
- Manufacturer:
- Texas Instruments
- Category:
- Signal Switches, Multiplexers, Decoders
- Package:
- 16-TSSOP (0.173", 4.40mm Width)
- Datasheet:
-
SN74LVC157AQPWRQ1.pdf
- Description:
- IC MULTIPLEXER 4 X 2:1 16TSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:1,718
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Product details
Overview
SN74LVC157AQPWRQ1 from Texas Instruments is an automotive-qualified quadruple 2-line to 1-line data selector/multiplexer operating from 2V to 3.6V, with 5.4ns max propagation delay at 3.3V, 5.5V-tolerant inputs, and active-low output strobe (G). It routes four independent 2:1 data paths in vehicle body control modules requiring deterministic signal routing under temperature extremes.
For engineers reviewing the SN74LVC157AQPWRQ1 datasheet, SN74LVC157AQPWRQ1 pinout, SN74LVC157AQPWRQ1 application, or SN74LVC157AQPWRQ1 equivalent, key selection criteria include its AEC-Q100 Grade 1 qualification (–40°C to +125°C), 5.5V input tolerance enabling mixed-voltage interfacing, low ground bounce (<0.8V), and WQFN/TSSOP/SOIC package options for space-constrained PCB layouts.
Technical Context
This device implements positive-logic 2:1 multiplexing per channel using a shared address select (A/B) and active-low strobe (G) to enable/disable all outputs simultaneously. Each of the four channels accepts 5.5V-tolerant inputs while powered from 2.7–3.6V, supporting level translation between 3.3V logic and legacy 5V subsystems.
Functional operation is defined by a three-input control matrix: G high forces all Y outputs low regardless of A/B or data inputs; G low enables selection where A/B = L routes A inputs to Y outputs, and A/B = H routes B inputs. No internal latching or clocking is present-operation is purely combinational.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply voltage | 2V to 3.6V - supports direct integration into 3.3V automotive domains without level-shifting circuitry |
| Input voltage tolerance | Up to 5.5V - allows connection to 5V microcontrollers or sensors without external clamping |
| Max propagation delay | 5.4ns at VCC = 3.3V - ensures sub-6ns timing margin for 100MHz+ data switching in ADAS sensor interfaces |
| Output drive strength | ±24mA at VCC = 3V - sufficient to drive multiple LVC loads or short PCB traces without buffering |
| Operating temperature | –40°C to +125°C - meets AEC-Q100 Grade 1 requirements for engine bay and powertrain applications |
| ESD rating | ±2000V HBM - exceeds automotive ESD immunity standards for assembly and field reliability |
| Power dissipation capacitance | 16pF at 3.3V - enables accurate dynamic power estimation in battery-sensitive modules |
Pinout & Package
SN74LVC157AQPWRQ1 is supplied in a 16-pin TSSOP (PW) package measuring 5.00 mm × 6.4 mm with 0.65 mm pitch. The thermal pad is not present in this variant (only in BQB/WQFN).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| G | Active-low output enable | Strobes all four Y outputs low when high; required for safe power-up sequencing and fault isolation |
| A/B | Channel select | Single control line determining whether A or B inputs are routed to Y outputs across all four channels |
| 1A–4A, 1B–4B | Data inputs | Eight total 5.5V-tolerant inputs grouped as four A/B pairs - each pair feeds one multiplexer channel |
| 1Y–4Y | Data outputs | Four CMOS-compatible outputs with rail-to-rail swing and ±24mA drive capability |
| VCC | Positive supply | Primary 2–3.6V power rail; requires local 0.1μF bypass capacitor per TI layout guidelines |
| GND | Ground reference | Common return path for all signals and supply current; must be low-impedance for noise control |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q100 qualified | Grade 1 (–40°C to +125°C) certification verified per automotive reliability test plan |
| 5.5V-tolerant inputs | Enables direct interface to 5V legacy ECUs or sensors without external voltage translators |
| Low ground bounce | Typical VOLP < 0.8V at 3.3V - reduces noise coupling into adjacent analog or RF circuits |
| Fast propagation delay | 5.4ns max at 3.3V - supports high-speed data routing in real-time vehicle networks |
| Output undershoot control | Typical VOHV > 2V - minimizes false triggering of downstream receivers during signal transitions |
Applications
| Body Control Module (BCM) | Instrument Cluster Interface |
|---|---|
Use Scenario: Routing sensor data (door lock status, seat position, ambient light) from multiple 5V sensors to a 3.3V microcontroller via shared bus lines. IC Role / Device Role / Timing Role: Quad 2:1 multiplexer selecting between primary and redundant sensor inputs per channel under microcontroller control. Use Value: Eliminates need for four discrete logic gates or a larger programmable logic device, reducing BOM count and PCB area by 30%. | Use Scenario: Consolidating display backlight dimming signals and gauge driver enable lines from dual-source MCUs in digital instrument clusters. IC Role / Device Role / Timing Role: Data selector routing PWM or enable signals from main or backup MCU based on system health status. Use Value: Provides fail-safe signal path selection with sub-6ns latency, meeting ASIL-B timing constraints for driver information systems. |
| ADAS Camera Interface | Power Distribution Unit (PDU) |
Use Scenario: Switching between primary and diagnostic video data streams from rear-view cameras before feeding to image processor. IC Role / Device Role / Timing Role: High-speed 2:1 data selector synchronizing with pixel clock domain while maintaining signal integrity. Use Value: Delivers 5.4ns propagation delay and low ground bounce to preserve video timing margins and reduce jitter-induced artifacts. | Use Scenario: Selecting between main and auxiliary power monitoring signals (voltage/current) for battery management in 48V mild-hybrid systems. IC Role / Device Role / Timing Role: Analog-signal multiplexer front-end (with external conditioning) routing sensor outputs to ADC inputs. Use Value: 5.5V input tolerance accommodates wide-range shunt monitor outputs; AEC-Q100 qualification ensures reliability in high-temperature under-hood environments. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar multiplexer applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SN74LVC157APWRE4 | Industrial-grade (non-automotive), same pinout and electrical specs but lacks AEC-Q100 qualification and extended temperature range | Suitable only for non-safety-critical cabin electronics or prototyping; not approved for powertrain or chassis systems | Select when cost sensitivity outweighs automotive qualification requirements and operating temperature stays within –40°C to +85°C |
| SN74LVCH157AQPWRQ1 | Includes bus-hold circuitry on all inputs, higher ICC (15μA vs. 10μA), identical AEC-Q100 Grade 1 rating and timing | Eliminates need for external pull-up/down resistors on floating inputs - beneficial in low-power always-on modules | Choose when input stability during sleep modes or partial power-down is critical, accepting minor power trade-off |
Compared with SN74LVC157APWRE4, SN74LVC157AQPWRQ1 adds automotive qualification and extended temperature support without sacrificing speed or drive strength; versus SN74LVCH157AQPWRQ1, it offers lower static current and no bus-hold, simplifying biasing in actively driven systems.
Availability
SN74LVC157AQPWRQ1 is available at Aetrix Electronics and suitable for automotive body control, instrument cluster, ADAS camera interface, and power distribution unit applications requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for SN74LVC157AQPWRQ1 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 company specializing in analog, embedded processing, and automotive ICs, with over 90 years of innovation in power management and signal chain solutions.
The SN74LVC157A-Q1 belongs to TI's automotive logic portfolio, designed specifically for robust signal routing in harsh-temperature vehicle subsystems where reliability, ESD immunity, and mixed-voltage interoperability are mandatory.
FAQ
What is the maximum operating voltage for SN74LVC157AQPWRQ1 inputs?
The SN74LVC157AQPWRQ1 inputs tolerate up to 5.5V regardless of VCC level, enabling direct interfacing with 5V logic families while powered from 2–3.6V supplies. This specification is validated per absolute maximum ratings and confirmed in Section 4.1 of the official datasheet, making SN74LVC157AQPWRQ1 suitable for voltage-level translation without external components.
Does SN74LVC157AQPWRQ1 support hot insertion or live swapping?
SN74LVC157AQPWRQ1 does not support hot insertion due to lack of Ioff protection or power-up 3-state behavior. Its inputs are 5.5V-tolerant but not powered-off isolated; applying signals before VCC stabilization may cause latch-up or excessive ICC. TI recommends powering VCC before asserting inputs, as specified in Section 4.3 recommended operating conditions.
What is the function of the G pin on SN74LVC157AQPWRQ1?
The G pin on SN74LVC157AQPWRQ1 is an active-low output strobe that disables all four Y outputs when high, forcing them to logic low regardless of A/B or data inputs. When G is low, the device operates normally, routing selected inputs to outputs. This enables global output control for power sequencing, fault containment, or bus arbitration in automotive networks.
Can SN74LVC157AQPWRQ1 operate at 1.8V supply?
No, SN74LVC157AQPWRQ1 cannot operate at 1.8V. Its recommended operating supply range is 2.0V to 3.6V, with minimum VCC = 2V specified in Section 4.3. At 1.8V, the device fails to meet guaranteed VOH/VOL levels, propagation delay, and noise margin specifications - use SN74LVC1G157 or similar 1.65–5.5V logic for 1.8V compatibility.
Is thermal pad connection required for SN74LVC157AQPWRQ1 in TSSOP package?
No, the SN74LVC157AQPWRQ1 in TSSOP (PW) package does not include a thermal pad. Thermal pad functionality applies only to the WQFN (BQB) variant (e.g., SN74LVC157AWBQBRQ1). The PW package relies on standard lead-frame conduction; TI recommends standard 0.1μF bypass capacitor placement near VCC/GND pins per Section 7.1 layout guidance.
SN74LVC157AQPWRQ1 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:
- Automotive
- Qualification:
- AEC-Q100
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 16-TSSOP
SN74LVC157AQPWRQ1 FAQ
1.How can I place an order for SN74LVC157AQPWRQ1 through Aetrix?
Please submit a Request for Quotation (RFQ) for SN74LVC157AQPWRQ1 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 SN74LVC157AQPWRQ1 reliable?
The price and inventory of SN74LVC157AQPWRQ1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SN74LVC157AQPWRQ1 is usually 5 days.
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SN74LVC157AQPWRQ1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SN74LVC157AQPWRQ1 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 SN74LVC157AQPWRQ1?
For technical support, including SN74LVC157AQPWRQ1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SN74LVC157AQPWRQ1 requirements.
6.How does Aetrix verify that SN74LVC157AQPWRQ1 is sourced from the original manufacturer or authorized distributors?
All SN74LVC157AQPWRQ1 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 SN74LVC157AQPWRQ1 meets industry standards.
7.What is the process for return or replacement of SN74LVC157AQPWRQ1?
All SN74LVC157AQPWRQ1 units undergo pre-shipment inspection (PSI). If there is an issue with SN74LVC157AQPWRQ1, 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 SN74LVC157AQPWRQ1 part is unused and in its original packaging.
Return procedure for SN74LVC157AQPWRQ1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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