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Texas Instruments SN74LVC157AQDRG4Q1
- Part No.:
- SN74LVC157AQDRG4Q1
- Manufacturer:
- Texas Instruments
- Category:
- Signal Switches, Multiplexers, Decoders
- Package:
- 16-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
SN74LVC157AQDRG4Q1.pdf
- Description:
- IC MULTIPLEXER 4 X 2:1 16SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:2,350
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Product details
Overview
SN74LVC157AQDRG4Q1 from Texas Instruments is an automotive-qualified quadruple 2-line to 1-line data selector/multiplexer 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 active-low output strobe (G) enabling channel gating - used in vehicle body control modules for signal routing between dual-sensor sources and MCU inputs.
For engineers reviewing the SN74LVC157AQDRG4Q1 datasheet, SN74LVC157AQDRG4Q1 pinout, SN74LVC157AQDRG4Q1 application, or SN74LVC157AQDRG4Q1 equivalent, key selection criteria include automotive AEC-Q100 Grade 1 qualification (-40°C to +125°C), SOIC-16 package compatibility, 3.3 V logic-level translation capability, and guaranteed ground-bounce performance (<0.8 V VOLP).
Technical Context
This device implements four independent 2:1 multiplexers sharing a common address select (A/B) and active-low strobe (G) input. When G is high, all outputs (1Y–4Y) are forced low regardless of A/B or data inputs; when G is low, each Y output reflects the selected A or B input per the A/B state.
It supports mixed-voltage interfacing: inputs tolerate up to 5.5 V while operating from 2 V–3.6 V VCC, enabling direct connection to legacy 5 V sensors or controllers without level-shifting. The logic diagram confirms true (non-inverting) data path behavior with no internal inversion on any channel.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCC Range | 2 V to 3.6 V - supports standard 3.3 V automotive domains and low-power operation down to 2 V. |
| Input Voltage Tolerance | Up to 5.5 V - allows direct interface with 5 V microcontrollers or sensors without external level shifters. |
| Max Propagation Delay | 5.4 ns at 3.3 V - ensures sub-6 ns timing margin for high-speed digital control loops in ADAS subsystems. |
| Output Drive Strength | ±24 mA at 3 V - sufficient to drive multiple CMOS loads or short PCB traces without buffering. |
| Operating Temperature | –40°C to +125°C - meets AEC-Q100 Grade 1 requirements for under-hood and cabin electronics. |
| ESD Rating | ±2000 V HBM - exceeds automotive ESD robustness standards for assembly and field reliability. |
| Power Dissipation Cap | 16 pF typical Cpd at 3.3 V - enables low dynamic power in battery-sensitive applications like door modules. |
Pinout & Package
SN74LVC157AQDRG4Q1 is packaged in a 16-pin SOIC (D package), 9.90 mm × 6.00 mm body size, with gull-wing leads and RoHS-compliant NiPdAu finish. Thermal pad is not present - thermal management relies on PCB copper area under the package body.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (G) | Active-low output strobe | Global enable: drives all outputs low when high; required for safe power-up/reset sequencing. |
| 2 (1A), 3 (1B), 4 (1Y) | Channel 1 data inputs/outputs | Independent 2:1 mux path - selects 1A or 1B to 1Y based on A/B pin state. |
| 5 (2A), 6 (2B), 7 (2Y) | Channel 2 data inputs/outputs | Second identical 2:1 path - supports parallel routing of dual-signal pairs (e.g., CAN TX/RX alternatives). |
| 8 (GND) | Ground reference | Primary return path for all logic and switching currents; must be low-impedance to suppress ground bounce. |
| 9 (3Y), 10 (3B), 11 (3A) | Channel 3 data outputs/inputs | Third mux channel - pin order follows mirrored layout (output first) to match physical SOIC pinout symmetry. |
| 12 (4Y), 13 (4B), 14 (4A) | Channel 4 data outputs/inputs | Final channel - enables full 4-channel signal consolidation from two 4-bit buses (e.g., sensor fusion inputs). |
| 15 (A/B) | Address select control | Single-bit bus selector: determines whether all Y outputs reflect A-inputs (A/B = low) or B-inputs (A/B = high). |
| 16 (VCC) | Positive supply | Must be bypassed with ≥0.1 µF ceramic capacitor placed within 3 mm of pin to stabilize switching transients. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q100 qualified | Grade 1 certified for automotive use - validated across temperature, lifetime, and stress test profiles per JESD47. |
| 5.5 V-tolerant inputs | Eliminates need for external voltage translators when interfacing with 5 V legacy ECUs or sensors. |
| Low ground bounce (VOLP) | Typical <0.8 V at VCC = 3.3 V - reduces noise coupling into adjacent analog or RF circuits on shared PCBs. |
| Fast propagation (tpd) | 5.4 ns max at 3.3 V - supports real-time signal selection in time-critical diagnostics and safety monitoring paths. |
| Strobe-controlled outputs | G input forces all Y outputs low synchronously - enables glitch-free bus arbitration and safe power-down states. |
Applications
| Body Control Module (BCM) | Advanced Driver Assistance Systems (ADAS) |
|---|---|
|
Use Scenario: Routing signals from dual redundant door latch sensors to a single MCU input pin during sleep-mode wake-up detection. IC Role / Device Role / Timing Role: Quad 2:1 multiplexer selecting between primary and backup sensor outputs under A/B control, with G strobe disabling outputs during MCU reset. Use Value: Reduces MCU GPIO count by 4 pins while maintaining fault-tolerant sensing - critical for space-constrained door module PCBs. |
Use Scenario: Consolidating camera trigger and sync signals from two image processors onto one video processor interface. IC Role / Device Role / Timing Role: Signal selector enabling hot-swappable camera source switching without interrupting video stream timing. Use Value: Enables seamless camera failover in surround-view systems with <5.4 ns propagation delay preserving frame sync integrity. |
| Instrument Cluster Display | Electric Power Steering (EPS) |
|
Use Scenario: Selecting between speedometer calibration data from EEPROM and real-time CAN bus speed values for display rendering. IC Role / Device Role / Timing Role: Data selector routing calibrated or raw speed data to display driver IC based on diagnostic mode flag (A/B). Use Value: Supports in-field calibration updates without hardware modification - leverages 5.5 V-tolerant inputs for direct CAN transceiver interface. |
Use Scenario: Multiplexing torque sensor outputs from primary and secondary Hall-effect sensors before ADC sampling. IC Role / Device Role / Timing Role: Safety-redundant signal selector ensuring continuous torque feedback even if one sensor fails. Use Value: Meets ASIL-B functional safety requirements via hardware-level redundancy - G strobe enables diagnostic forcing of known-safe output state. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar multiplexer applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SN74LVC157ADRQ1 | No "G4" suffix; same SOIC-16 package and electrical specs but lacks TI's enhanced green marking and tape-and-reel packaging per automotive logistics standards. | Approved for industrial use only; not AEC-Q100 qualified - unsuitable for production automotive ECUs. | Select SN74LVC157AQDRG4Q1 for Tier 1 automotive programs requiring traceable, automotive-grade logistics and qualification. |
| MC74VHC157DTG | ON Semiconductor part; wider VCC range (2 V–5.5 V), slower tpd (11 ns at 5 V), different pinout (G active-high), and no AEC-Q100 Grade 1 rating. | Used in non-automotive industrial controls; requires board redesign due to pin mismatch and higher supply voltage dependency. | Only consider MC74VHC157DTG if migrating legacy 5 V designs where AEC-Q100 compliance is not required. |
Compared with SN74LVC157ADRQ1 and MC74VHC157DTG, SN74LVC157AQDRG4Q1 uniquely delivers AEC-Q100 Grade 1 qualification, 5.4 ns speed at 3.3 V, and automotive logistics compliance - making it the sole choice for production vehicle body and chassis control units.
Availability
SN74LVC157AQDRG4Q1 is available at Aetrix Electronics and suitable for automotive body control modules, ADAS sensor fusion units, instrument cluster displays, and electric power steering systems requiring stable component supply across extended product lifecycles.
Supply support for SN74LVC157AQDRG4Q1 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 silicon solutions with over 50 years of automotive qualification experience.
SN74LVC157AQDRG4Q1 belongs to TI's LVC logic family - designed specifically for low-voltage, high-speed automotive signal routing with robust ESD protection and wide input voltage tolerance.
FAQ
What is the maximum operating temperature for SN74LVC157AQDRG4Q1?
The SN74LVC157AQDRG4Q1 is rated for operation from –40°C to +125°C ambient temperature, meeting AEC-Q100 Grade 1 requirements for under-hood and cabin-mounted automotive electronics. This specification is validated across all electrical parameters in the datasheet's recommended operating conditions table.
Does SN74LVC157AQDRG4Q1 support 5 V input signals?
Yes, SN74LVC157AQDRG4Q1 accepts input voltages up to 5.5 V regardless of VCC level (2 V–3.6 V), enabling direct interfacing with 5 V microcontrollers or sensors without external level shifters - a key feature confirmed in Section 4.3 of the datasheet.
What is the function of the G pin on SN74LVC157AQDRG4Q1?
The G pin on SN74LVC157AQDRG4Q1 is an active-low output strobe: when high, all four Y outputs (1Y–4Y) are forced low; when low, the multiplexer operates normally, routing selected A or B inputs to outputs based on the A/B control signal.
Is SN74LVC157AQDRG4Q1 pin-compatible with standard SN74LVC157A variants?
Yes, SN74LVC157AQDRG4Q1 uses the same SOIC-16 (D) package and identical pinout as non-automotive SN74LVC157A variants - including SN74LVC157ADRQ1 - allowing drop-in replacement in existing layouts where AEC-Q100 qualification is added post-design.
What is the typical power dissipation capacitance of SN74LVC157AQDRG4Q1?
The typical power dissipation capacitance (Cpd) of SN74LVC157AQDRG4Q1 is 16 pF at VCC = 3.3 V and f = 10 MHz, as specified in Section 4.7 of the datasheet - a value critical for estimating dynamic power consumption in battery-powered automotive modules.
SN74LVC157AQDRG4Q1 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- 74LVC
- Package/Case:
- 16-SOIC (0.154", 3.90mm 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-SOIC
SN74LVC157AQDRG4Q1 FAQ
1.How can I place an order for SN74LVC157AQDRG4Q1 through Aetrix?
Please submit a Request for Quotation (RFQ) for SN74LVC157AQDRG4Q1 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 SN74LVC157AQDRG4Q1 reliable?
The price and inventory of SN74LVC157AQDRG4Q1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SN74LVC157AQDRG4Q1 is usually 5 days.
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SN74LVC157AQDRG4Q1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SN74LVC157AQDRG4Q1 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 SN74LVC157AQDRG4Q1?
For technical support, including SN74LVC157AQDRG4Q1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SN74LVC157AQDRG4Q1 requirements.
6.How does Aetrix verify that SN74LVC157AQDRG4Q1 is sourced from the original manufacturer or authorized distributors?
All SN74LVC157AQDRG4Q1 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 SN74LVC157AQDRG4Q1 meets industry standards.
7.What is the process for return or replacement of SN74LVC157AQDRG4Q1?
All SN74LVC157AQDRG4Q1 units undergo pre-shipment inspection (PSI). If there is an issue with SN74LVC157AQDRG4Q1, 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 SN74LVC157AQDRG4Q1 part is unused and in its original packaging.
Return procedure for SN74LVC157AQDRG4Q1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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