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Texas Instruments SN74LV157APW
- Part No.:
- SN74LV157APW
- Manufacturer:
- Texas Instruments
- Category:
- Signal Switches, Multiplexers, Decoders
- Package:
- 16-TSSOP (0.173", 4.40mm Width)
- Datasheet:
-
SN74LV157APW.pdf
- Description:
- IC MULTIPLEXER 4 X 2:1 16TSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:400
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Product details
Overview
SN74LV157APW from Texas Instruments is a quadruple 2-line to 1-line data selector/multiplexer operating from 2 V to 5.5 V, delivering 7.5 ns max propagation delay at 5 V, supporting 5.5 V-tolerant inputs, and rated for –40°C to +85°C industrial temperature range. It routes four independent 2:1 data paths under a common address select (A/B) and active-low strobe (G), used in I/O expansion and signal routing within LED displays and telecom infrastructure.
For engineers reviewing the SN74LV157APW datasheet, SN74LV157APW pinout, SN74LV157APW application, or SN74LV157APW equivalent, key selection criteria include its TSSOP-16 package (5 mm × 4.4 mm), 16-pin logic-level multiplexing capability, 2.5–5 V switching performance, and compatibility with mixed-voltage system interfaces requiring level-shifting input tolerance.
Technical Context
The SN74LV157APW implements four independent positive-logic 2:1 multiplexers with true (non-inverted) outputs and a shared active-low output enable (G). Each channel selects between two inputs (A and B) using a single address line (A/B), enabling compact 4-bit word routing without inversion.
Its design supports mixed-voltage operation: inputs tolerate up to 5.5 V regardless of VCC (2–5.5 V), allowing interfacing with higher-voltage logic while powered from lower supplies. Output drive strength is specified at ±12 mA (VCC = 4.5–5.5 V), with ground bounce (VOLP) < 0.8 V and undershoot (VOHV) > 2 V at 25°C.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCC Range | 2 V to 5.5 V - Enables direct interface with 2.5 V, 3.3 V, and 5 V logic domains without level shifters. |
| Max tpd @ 5 V | 7.5 ns - Supports high-speed data routing in real-time control and display update paths. |
| Input Voltage Tolerance | Up to 5.5 V - Allows safe connection to legacy 5 V buses while operating from 3.3 V supply. |
| Output Drive | ±12 mA @ 5 V - Sufficient to drive multiple CMOS loads or moderate capacitive traces (≤50 pF). |
| Operating Temp | –40°C to +85°C - Qualified for industrial-grade embedded systems including network switches and motor drivers. |
| ESD Rating | HBM ±2000 V - Meets standard handling requirements for automated assembly and field service. |
Pinout & Package
TSSOP-16 package (PW), body size 5.0 mm × 4.4 mm, 1.2 mm max height, JEDEC MO-153 compliant, lead finish NIPDAU/SN, MSL Level-1.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (A/B) | Address select input | Common control for all four 2:1 channels - determines whether A or B input is routed to Y output. |
| 2 (1A), 3 (1B), 4 (1Y) | Channel 1 data inputs / output | First independent 2:1 path - used for bit-0 data routing in parallel bus applications. |
| 5 (2A), 6 (2B), 7 (2Y) | Channel 2 data inputs / output | Second independent 2:1 path - enables simultaneous routing of bit-1 signals. |
| 8 (GND) | Ground reference | Primary return path for all internal logic and output drivers - must be low-impedance. |
| 9 (3Y), 10 (3B), 11 (3A) | Channel 3 data output / inputs | Third 2:1 path - supports full 4-bit word selection when combined with other channels. |
| 12 (4Y), 13 (4B), 14 (4A) | Channel 4 data output / inputs | Fourth 2:1 path - completes quad-mux functionality for byte-wide data switching. |
| 15 (G) | Active-low output enable | Global strobe - disables all Y outputs (high-impedance) when asserted low; overrides A/B selection. |
| 16 (VCC) | Positive supply | Single power rail for entire device - bypass capacitor (0.1 µF) required near pin for noise suppression. |
Key Features
| Feature | Design Value |
|---|---|
| Wide VCC range (2–5.5 V) | Eliminates need for separate voltage translators in mixed-supply systems such as FPGA I/O banks interfacing with microcontrollers. |
| 5.5 V-tolerant inputs | Permits direct connection to 5 V legacy peripherals (e.g., older ADCs or DACs) while operating from 3.3 V or 2.5 V rails. |
| Low propagation delay (7.5 ns @ 5 V) | Enables sub-100 MHz data switching in timing-critical paths like LED column drivers or sensor multiplexing. |
| High noise immunity (VOLP < 0.8 V, VOHV > 2 V) | Reduces risk of false triggering in electrically noisy environments such as motor drive PCBs or telecom backplanes. |
| Latch-up immunity (>100 mA) | Ensures robustness against transient overvoltage events during hot-plug or ESD exposure in industrial equipment. |
Applications
| LED Display Multiplexing | Network Switch Data Routing |
|---|---|
Use Scenario: Driving column/row lines in 16-segment or dot-matrix LED displays where multiple digit banks share common anode/cathode drivers. IC Role / Device Role / Timing Role: Quad 2:1 mux selects between two sets of display data (e.g., static vs. scrolling content) under microcontroller control. Use Value: Reduces GPIO count by 4× versus discrete gate solutions while maintaining deterministic 7.5 ns switching for flicker-free updates. | Use Scenario: Selecting between primary and backup packet buffers or PHY interfaces in managed Ethernet switches. IC Role / Device Role / Timing Role: Routes 4-bit status or configuration words between redundant control paths with glitch-free switching via G strobe. Use Value: Provides hardware-level failover arbitration without software intervention, meeting sub-microsecond switchover requirements. |
| I/O Expansion for Microcontrollers | Motor Driver Interface Logic |
Use Scenario: Expanding limited GPIO resources on ARM Cortex-M0+ or RISC-V SoCs to manage multiple sensors or actuators. IC Role / Device Role / Timing Role: Acts as a programmable signal router - e.g., directing UART TX/RX lines to different peripheral modules based on mode register. Use Value: Enables dynamic reconfiguration of communication interfaces without PCB redesign or additional MCU pins. | Use Scenario: Conditioning direction and enable signals for dual H-bridge motor drivers in robotics or HVAC actuators. IC Role / Device Role / Timing Role: Selects between manual (potentiometer) and automatic (MCU PWM) speed control inputs for each motor channel. Use Value: Supports both local analog override and closed-loop digital control in same hardware, improving field serviceability. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar 2:1 multiplexer applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SN74LVCH157APW | Includes bus-hold circuitry on all inputs; otherwise identical pinout, timing, and voltage specs. | Better suited for systems with floating inputs or long trace runs where signal integrity is marginal. | Choose SN74LVCH157APW if input pull-ups are omitted and board layout lacks controlled impedance. |
| 74LVC157AD | SOIC-16 package only; slightly higher ICC (max 10 µA vs. 20 µA); identical logic function and AC specs. | Preferred for through-hole prototyping or legacy SOIC-based designs requiring drop-in replacement. | Select 74LVC157AD only when TSSOP assembly is unavailable and thermal budget allows SOIC's higher RθJA (73°C/W vs. 108°C/W). |
Compared with SN74LV157APW, SN74LVCH157APW adds input bus-hold for robustness in unterminated systems, while 74LVC157AD trades TSSOP miniaturization for SOIC manufacturability - both require no PCB changes but differ in layout-driven reliability and thermal management trade-offs.
Availability
SN74LV157APW is available at Aetrix Electronics and suitable for LED displays, network switches, and motor drivers requiring stable component supply across industrial temperature ranges and mixed-voltage interface designs.
Supply support for SN74LV157APW 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 ICs, with decades of experience in industrial, automotive, and communications markets.
The SN74LV157A product line delivers low-voltage, high-speed logic solutions optimized for interoperability across 2.5 V, 3.3 V, and 5 V systems - specifically targeting space-constrained, noise-sensitive applications in infrastructure and control electronics.
FAQ
What is the maximum operating voltage for SN74LV157APW inputs?
The SN74LV157APW inputs tolerate up to 5.5 V regardless of VCC level, enabling direct connection to 5 V logic even when powered from 2.5 V or 3.3 V. This specification is explicitly guaranteed in the Absolute Maximum Ratings table and confirmed across all recommended operating conditions - no external clamping is required for 5 V-tolerant operation.
Does SN74LV157APW support hot-swap or live-insertion?
SN74LV157APW is not characterized for hot-swap operation. While its Ioff specification (5 µA max) limits power-off leakage, the device lacks explicit hot-swap protection features such as slew-rate controlled outputs or undervoltage lockout. For live-insertion applications, external current-limiting and sequencing circuitry is required to ensure safe ramp-up of VCC and signal lines before enabling G.
Can SN74LV157APW replace SN74LS157 in existing designs?
SN74LV157APW can replace SN74LS157 in many cases due to identical pinout and logic function, but requires validation of VCC compatibility (LS uses 5 V only; LV157A supports 2–5.5 V), reduced drive strength (±12 mA vs. ±24 mA), and absence of TTL input thresholds. Input VIH/VIL levels differ significantly - LV157A uses CMOS-compatible thresholds scaled to VCC, not fixed TTL levels.
What is the thermal resistance (RθJA) of SN74LV157APW in its TSSOP-16 package?
The junction-to-ambient thermal resistance (RθJA) for SN74LV157APW in the PW (TSSOP-16) package is 108°C/W, as specified in Section 6.4 of the datasheet. This value assumes standard JEDEC high-K test board conditions (2S2P); actual board-level performance depends on copper area, layer count, and airflow - derating is recommended above 70°C ambient.
Is SN74LV157APW RoHS compliant and lead-free?
Yes, SN74LV157APW is RoHS compliant and lead-free. The orderable part SN74LV157APWRG4 (a functional equivalent with G4 suffix indicating green packaging) confirms NIPDAU lead finish and RoHS compliance per TI's Package Option Addendum. The base SN74LV157APW is marked obsolete but retains identical material specifications per TI's documentation archive.
SN74LV157APW Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- 74LV
- Package/Case:
- 16-TSSOP (0.173", 4.40mm Width)
- Packaging:
- Bulk
- Product Status:
- Obsolete
- Type:
- Multiplexer
- Circuit:
- 4 x 2:1
- Independent Circuits:
- 1
- Current - Output High, Low:
- 12mA, 12mA
- Voltage Supply Source:
- Single Supply
- Voltage - Supply:
- 2V ~ 5.5V
- Operating Temperature:
- -40°C ~ 85°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 16-TSSOP
SN74LV157APW FAQ
1.How can I place an order for SN74LV157APW through Aetrix?
Please submit a Request for Quotation (RFQ) for SN74LV157APW 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 SN74LV157APW reliable?
The price and inventory of SN74LV157APW are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SN74LV157APW is usually 5 days.
3.What payment methods are accepted for SN74LV157APW?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SN74LV157APW transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SN74LV157APW?
SN74LV157APW orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SN74LV157APW 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 SN74LV157APW?
For technical support, including SN74LV157APW datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SN74LV157APW requirements.
6.How does Aetrix verify that SN74LV157APW is sourced from the original manufacturer or authorized distributors?
All SN74LV157APW 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 SN74LV157APW meets industry standards.
7.What is the process for return or replacement of SN74LV157APW?
All SN74LV157APW units undergo pre-shipment inspection (PSI). If there is an issue with SN74LV157APW, 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 SN74LV157APW part is unused and in its original packaging.
Return procedure for SN74LV157APW:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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