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Texas Instruments SN74LVC157APW
- Part No.:
- SN74LVC157APW
- Manufacturer:
- Texas Instruments
- Category:
- Signal Switches, Multiplexers, Decoders
- Package:
- 16-TSSOP (0.173", 4.40mm Width)
- Datasheet:
-
SN74LVC157APW.pdf
- Description:
- IC MULTIPLEXER 4 X 2:1 16TSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:901
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Product details
Overview
SN74LVC157APW from Texas Instruments is a quadruple 2-line to 1-line data selector/multiplexer in 16-pin TSSOP package, operating from 1.65V to 3.6V supply, with 5.2ns max propagation delay at 3.3V, 5.5V-tolerant inputs, and –40°C to 125°C temperature range. It serves as a logic-level multiplexing solution in digital signal routing applications such as bus arbitration and data path selection.
For engineers reviewing the SN74LVC157APW datasheet, SN74LVC157APW pinout, SN74LVC157APW application, or SN74LVC157APW equivalent, key selection criteria include its 16-pin TSSOP (PW) footprint, true-output logic architecture, output enable strobe (G), address-select control (A/B), and compatibility with mixed-voltage 3.3V/5V system interfaces.
Technical Context
The SN74LVC157APW implements four independent 2:1 multiplexers sharing a common active-low output strobe (G) and a shared address select (A/B) input. When G is high, all Y outputs are forced low regardless of A/B or data inputs; when G is low, each Y output reflects the selected input (A or B) per channel.
Its CMOS design supports 5.5V-tolerant inputs while operating on VCC as low as 1.65V, enabling level translation between 3.3V logic domains and legacy 5V peripherals. The device exhibits typical ground bounce (VOLP) <0.8V and undershoot (VOHV) >2V at 3.3V, confirming robust noise immunity in high-speed switching environments.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCC Range | 1.65V to 3.6V - Enables operation across low-voltage embedded systems and mixed-supply interface designs. |
| Max Propagation Delay | 5.2ns at 3.3V - Supports high-speed data routing up to ~190 MHz clock-equivalent timing. |
| Input Voltage Tolerance | Up to 5.5V - Allows direct connection to 5V logic without external level shifters. |
| Operating Temperature | –40°C to 125°C - Qualified for industrial and automotive under-hood applications. |
| Output Drive Strength | ±24mA at 3V - Sufficient to drive multiple LVC loads or moderate PCB trace capacitance. |
| ESD Rating | ±2000V HBM - Meets JEDEC JESD22-A114 standard for handling robustness. |
| Power Dissipation | 500mW (TA ≤ 60°C) - Supports continuous operation in compact TSSOP-16 packages with appropriate thermal layout. |
Pinout & Package
TSSOP-16 (PW) package: 5.00 mm × 6.4 mm body size, 16-pin surface-mount, lead-free (NIPDAU), moisture sensitivity level 1 (260°C reflow unlimited).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (G) | Active-low output strobe | Global enable: drives all Y outputs low when high; enables multiplexing when low. |
| 2 (1A), 3 (1B), 4 (1Y) | Channel 1 data inputs / output | First 2:1 mux pair: selects 1A or 1B to 1Y based on A/B state. |
| 5 (2A), 6 (2B), 7 (2Y) | Channel 2 data inputs / output | Second independent 2:1 mux with identical control behavior. |
| 8 (GND) | Ground reference | Primary return path for logic and switching currents; must be low-impedance. |
| 9 (3Y), 10 (3B), 11 (3A) | Channel 3 data output / inputs | Third 2:1 mux; pin order follows consistent Y-B-A sequence per channel. |
| 12 (4Y), 13 (4B), 14 (4A) | Channel 4 data output / inputs | Fourth 2:1 mux; completes full quad-mux functionality. |
| 15 (A/B) | Address select control | Single-bit bus selecting source A (low) or B (high) across all four channels. |
| 16 (VCC) | Positive supply | Must be bypassed with 0.1µF capacitor near pin to suppress switching noise. |
Key Features
| Feature | Design Value |
|---|---|
| True-output logic architecture | Delivers non-inverted data selection-no polarity inversion required in signal path. |
| 5.5V-tolerant inputs on 1.65V–3.6V supply | Eliminates need for external level translators when interfacing with 5V microcontrollers or sensors. |
| Low propagation delay (5.2ns @ 3.3V) | Enables use in timing-critical paths such as FPGA I/O expansion or real-time control loops. |
| High ESD immunity (2000V HBM) | Reduces risk of field failure during board assembly or end-user handling. |
| Industrial temperature range (–40°C to 125°C) | Validated for deployment in motor control, power conversion, and factory automation systems. |
Applications
| Bus Arbitration Logic | Data Path Selection |
|---|---|
Use Scenario: Selecting between two parallel data sources (e.g., primary sensor vs. backup sensor) feeding a single ADC input channel. IC Role / Device Role / Timing Role: Quad 2:1 multiplexer providing synchronized, glitch-free source switching under microcontroller control via A/B and G pins. Use Value: Reduces PCB component count by consolidating four independent 2:1 switches into one TSSOP-16 IC with shared control lines. | Use Scenario: Routing signals from dual microcontroller banks (e.g., main CPU and safety monitor) to shared communication peripherals (UART, SPI). IC Role / Device Role / Timing Role: Level-translating multiplexer enabling 5V-capable peripherals to interface safely with 3.3V MCU I/Os. Use Value: Input tolerance up to 5.5V allows direct connection to legacy 5V UART transceivers without additional voltage-shifting circuitry. |
| Test Mode Switching | Configuration Signal Multiplexing |
Use Scenario: Enabling production test access by routing internal diagnostic signals to a debug header only during test mode. IC Role / Device Role / Timing Role: Strobe-gated multiplexer where G pin is asserted high during normal operation (disabling outputs) and pulled low during test. Use Value: Prevents unintended signal injection during functional operation while allowing full visibility during validation. | Use Scenario: Selecting between factory-default and field-updated configuration bits stored in separate EEPROM locations. IC Role / Device Role / Timing Role: Low-latency, rail-to-rail digital switch routing configuration data to an FPGA configuration controller. Use Value: 5.2ns propagation delay ensures minimal impact on configuration boot timing in time-sensitive embedded boot sequences. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar 2:1 multiplexer applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SN74LVC157AD | SOIC-16 package (9.90 mm × 6.00 mm); higher RθJA (118.1°C/W) than PW package (141.8°C/W). | Better suited for through-hole prototyping or legacy board designs requiring SOIC footprint. | Select SN74LVC157AD if board layout uses SOIC pads or requires manual soldering compatibility. |
| SN74LVC157APWR | Same TSSOP-16 package but supplied in 2000-unit tape-and-reel; identical electrical specs and marking (LC157A). | Optimized for automated SMT production with reel-fed pick-and-place equipment. | Choose SN74LVC157APWR for high-volume manufacturing where reel packaging reduces line changeover time. |
Compared with SN74LVC157AD and SN74LVC157APWR, the SN74LVC157APW offers identical logic functionality and electrical performance in a 90-unit tube format ideal for engineering evaluation, small-batch builds, and lab verification prior to volume ramp.
Availability
SN74LVC157APW is available at Aetrix Electronics and suitable for industrial control, automotive diagnostics, and test equipment applications requiring stable component supply and long-term manufacturability.
Supply support for SN74LVC157APW 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 logic solutions with over 90 years of innovation in high-reliability electronics.
The SN74LVC157A product line delivers advanced low-voltage CMOS multiplexers optimized for mixed-signal system integration, supporting seamless interoperability between 3.3V and 5V logic domains in space-constrained industrial and automotive platforms.
FAQ
What is the maximum input voltage rating for SN74LVC157APW?
The SN74LVC157APW supports input voltages up to 5.5V regardless of VCC level, enabling safe interfacing with 5V logic families while operating from as low as 1.65V. This specification is confirmed in Section 4.1 (Absolute Maximum Ratings) and Section 4.4 (Recommended Operating Conditions) of the TI datasheet SCAS292S.
Does SN74LVC157APW require external pull-up or pull-down resistors on unused inputs?
Yes - all unused inputs of the SN74LVC157APW must be held at VCC or GND to prevent floating states that cause increased ICC, undefined outputs, or excessive power consumption. This requirement is explicitly stated in Sections 4.3 and 4.4 of the datasheet and reinforced in Layout Guideline 7.2.1.
What is the thermal resistance (RθJA) of SN74LVC157APW in its TSSOP-16 package?
The junction-to-ambient thermal resistance (RθJA) for SN74LVC157APW in the PW (TSSOP-16) package is 141.8°C/W, as specified in Table 4-5 (Thermal Information) of the datasheet. This value applies under standard JEDEC high-K board conditions and must be considered when estimating die temperature rise under load.
Can SN74LVC157APW operate reliably at 1.65V supply voltage?
Yes - the SN74LVC157APW is fully specified down to 1.65V VCC across its entire operating temperature range (–40°C to 125°C), with verified VOH, VOL, tpd, and II performance per Section 4.7 (Electrical Characteristics, SN74LVC157A). At 1.65V, it delivers ±4mA output drive and 13.5ns max tpd.
Is SN74LVC157APW pin-compatible with older 74LS157 or 74HC157 devices?
No - SN74LVC157APW is not pin-compatible with 74LS157 (16-pin PDIP) or 74HC157 (16-pin SOIC/DIP), due to differing pin assignments: the LVC157A places G (strobe) on Pin 1 and A/B on Pin 15, whereas LS/HC variants locate G on Pin 15 and A/B on Pin 1. Always verify pin mapping using Figure 3-1 in the datasheet before substitution.
SN74LVC157APW Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- 74LVC
- Package/Case:
- 16-TSSOP (0.173", 4.40mm Width)
- Packaging:
- Bulk
- 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 ~ 85°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 16-TSSOP
SN74LVC157APW FAQ
1.How can I place an order for SN74LVC157APW through Aetrix?
Please submit a Request for Quotation (RFQ) for SN74LVC157APW 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 SN74LVC157APW reliable?
The price and inventory of SN74LVC157APW are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SN74LVC157APW is usually 5 days.
3.What payment methods are accepted for SN74LVC157APW?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SN74LVC157APW transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SN74LVC157APW?
SN74LVC157APW orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SN74LVC157APW 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 SN74LVC157APW?
For technical support, including SN74LVC157APW datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SN74LVC157APW requirements.
6.How does Aetrix verify that SN74LVC157APW is sourced from the original manufacturer or authorized distributors?
All SN74LVC157APW 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 SN74LVC157APW meets industry standards.
7.What is the process for return or replacement of SN74LVC157APW?
All SN74LVC157APW units undergo pre-shipment inspection (PSI). If there is an issue with SN74LVC157APW, 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 SN74LVC157APW part is unused and in its original packaging.
Return procedure for SN74LVC157APW:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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