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Texas Instruments SN74LV157APWG4
- Part No.:
- SN74LV157APWG4
- Manufacturer:
- Texas Instruments
- Category:
- Signal Switches, Multiplexers, Decoders
- Package:
- 16-TSSOP (0.173", 4.40mm Width)
- Datasheet:
-
SN74LV157APWG4.pdf
- Description:
- IC MULTIPLEXER 4 X 2:1 16TSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:4,734
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Product details
Overview
SN74LV157APWG4 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 common address (A/B) and active-low strobe (G) control, used in LED display column drivers and I/O expansion logic.
For engineers reviewing the SN74LV157APWG4 datasheet, SN74LV157APWG4 pinout, SN74LV157APWG4 application, or SN74LV157APWG4 equivalent, key selection criteria include its 16-pin TSSOP package, 5.5 V input tolerance, sub-8 ns tpd at 5 V, latch-up immunity (>100 mA), and compatibility with mixed-voltage 2.5 V/3.3 V/5 V system buses.
Technical Context
The SN74LV157APWG4 implements true-output (non-inverting) 2:1 multiplexing across four independent channels, each with dedicated A/B data inputs, shared select (A/B), shared active-low output enable (G), and individual Y outputs. Its logic diagram confirms positive-logic operation with no internal inversion between inputs and outputs.
All four channels operate synchronously under identical control signals: A/B selects source (A or B), while G enables/disables all outputs simultaneously. The device exhibits rail-to-rail output swing (VOL ≤ 0.55 V, VOH ≥ 3.8 V at 4.5 V), low dynamic ground bounce (<0.8 V), and undershoot immunity (>2 V VOHV), enabling clean signal routing in noise-sensitive digital interfaces.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCC Range | 2 V to 5.5 V - supports direct interface with 2.5 V, 3.3 V, and 5 V logic families without level shifters. |
| Max tpd @ 5 V | 7.5 ns - ensures sub-10 ns channel switching for high-speed bus arbitration and display refresh timing. |
| Input Voltage Tolerance | Up to 5.5 V - allows safe connection of 5 V signals into 3.3 V or 2.5 V systems without external clamping. |
| Output Drive | ±12 mA @ 4.5 V - sufficient to drive 50 pF loads directly and fan out to multiple CMOS inputs. |
| Latch-up Immunity | >100 mA per JESD 78 Class II - guarantees robustness against transient current faults in industrial environments. |
| Operating Temperature | –40°C to +85°C - qualified for extended industrial use in telecom infrastructure and motor control enclosures. |
Pinout & Package
TSSOP-16 (PW) package: 5.0 mm × 4.4 mm body, 0.65 mm lead pitch, 1.2 mm max height, RoHS-compliant NIPDAU finish, MSL Level-1.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | A/B | Global address select: controls source (A or B) for all four channels simultaneously. |
| 2, 3, 11, 14 | 1A / 1B / 3A / 4A / 4B | Data inputs: two per channel (A and B); pins 2/3 = Ch1, 11/14 = Ch3/Ch4, 5/6 = Ch2 (per top-view pinout). |
| 4, 7, 9, 12 | 1Y / 2Y / 3Y / 4Y | True-output data outputs: one per channel, active when G = low. |
| 15 | G | Active-low output enable: disables all Y outputs (high-impedance) when high. |
| 8 | GND | Ground reference for logic and power return path. |
| 16 | VCC | Positive supply: powers internal logic and output drivers; decoupling required per layout guidelines. |
Key Features
| Feature | Design Value |
|---|---|
| Wide Supply Range | 2 V to 5.5 V operation enables single-supply compatibility across legacy 5 V and modern low-voltage systems. |
| 5.5 V-Tolerant Inputs | Accepts 5 V signals regardless of VCC level - eliminates need for external voltage translators in mixed-VCC designs. |
| Low Propagation Delay | 7.5 ns max at 5 V ensures tight timing margins in high-frequency data routing and real-time control loops. |
| High Noise Immunity | Typical VOLP < 0.8 V and VOHV > 2 V reduce false triggering in electrically noisy industrial environments. |
| Robust ESD Protection | ±2000 V HBM rating meets industrial handling requirements and reduces board-level ESD mitigation cost. |
Applications
| LED Display Drivers | Network Switch Control Logic |
|---|---|
|
Use Scenario: Driving column segments in 16-segment or dot-matrix LED displays with dynamic scanning. IC Role / Device Role / Timing Role: Routes digit-specific data from two parallel sources (e.g., primary vs. backup register) to column drivers under microcontroller address control. Use Value: Enables flicker-free multiplexed display updates using precise 7.5 ns channel switching and 5.5 V-tolerant inputs for legacy display IC interfacing. |
Use Scenario: Selecting between redundant data paths or configuration registers in enterprise network switch ASIC support logic. IC Role / Device Role / Timing Role: Provides failover-ready 2:1 data selection for critical control bus lines, synchronized via shared A/B and G signals. Use Value: Delivers deterministic sub-10 ns path switching and latch-up immunity (>100 mA) for reliable operation in thermally stressed rack-mounted equipment. |
| I/O Expansion Interfaces | Motor Driver Signal Routing |
|
Use Scenario: Expanding GPIO count on microcontrollers by time-multiplexing sensor inputs or actuator outputs. IC Role / Device Role / Timing Role: Acts as a hardware-based demultiplexer, routing four independent bidirectional I/O lines through shared address/control lines. Use Value: Reduces MCU pin count pressure while maintaining full-speed operation via 2 V–5.5 V flexible supply and ±12 mA drive capability. |
Use Scenario: Selecting between position feedback sources (e.g., encoder vs. Hall sensor) or PWM command paths in closed-loop motor drives. IC Role / Device Role / Timing Role: Synchronizes real-time signal selection across four motor phases using common strobe (G) for glitch-free transitions. Use Value: Ensures deterministic 7.5 ns propagation and rail-to-rail output swing (VOL ≤ 0.55 V) for accurate timing-critical commutation decisions. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar quad 2:1 multiplexer applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SN74LV157ADR | SOIC-16 package (10.3 mm × 7.5 mm), higher thermal resistance (RθJA = 73°C/W), same electrical specs. | Better suited for prototyping or through-hole assembly; less space-constrained than TSSOP. | Select when board area permits larger footprint and hand-soldering is preferred over fine-pitch reflow. |
| 74LVC157AD | Lower VCC min (1.65 V), slightly faster tpd (6.7 ns @ 3.3 V), but only 3.6 V input tolerant - not 5.5 V compatible. | Optimized for ultra-low-voltage 1.8 V/3.3 V systems; unsuitable for 5 V signal domains. | Choose only if system operates exclusively below 3.6 V and 5 V signal interfacing is unnecessary. |
Compared with SN74LV157APWG4, SN74LV157ADR offers identical logic functionality in a larger SOIC package for easier handling, while 74LVC157AD trades 5.5 V input tolerance for lower-voltage operation and marginal speed gain - making SN74LV157APWG4 the optimal choice for mixed-voltage industrial I/O routing.
Availability
SN74LV157APWG4 is available at Aetrix Electronics and suitable for LED display drivers, network switch control logic, and motor driver signal routing requiring stable component supply across industrial temperature ranges and long production lifecycles.
Supply support for SN74LV157APWG4 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 decades of experience in industrial-grade interface and signal-path components.
The SN74LV157A family was designed for robust, wide-supply-voltage data routing in industrial and telecom infrastructure - prioritizing voltage flexibility, noise resilience, and latch-up immunity over ultra-low power or ultra-high speed.
FAQ
What is the maximum supply voltage for SN74LV157APWG4?
The SN74LV157APWG4 supports a maximum supply voltage (VCC) of 5.5 V, with absolute maximum ratings extending to 7 V - however, continuous operation above 5.5 V is not recommended. Its 5.5 V input tolerance allows safe interfacing with 5 V signals even when powered from 3.3 V or 2.5 V rails, a key advantage in mixed-voltage system design.
Does SN74LV157APWG4 support 5 V logic inputs when powered from 3.3 V?
Yes, SN74LV157APWG4 accepts input voltages up to 5.5 V regardless of VCC level - meaning it can reliably interface with 5 V TTL or CMOS outputs while operating from a 3.3 V supply. This eliminates external level-shifting circuitry in many industrial and telecom applications where legacy 5 V subsystems connect to modern low-voltage controllers.
What is the propagation delay of SN74LV157APWG4 at 3.3 V operation?
At VCC = 3.3 V ± 0.3 V and CL = 15 pF, the SN74LV157APWG4 exhibits a typical propagation delay (tpd) of 5.21 ns (A/B → Y) and 5.81 ns (A/B → Y with strobe), with a maximum of 9.5 ns. These values are confirmed in Section 6.7 of the official datasheet and ensure timing compliance in high-speed 3.3 V bus architectures.
Is SN74LV157APWG4 pin-compatible with older SN74LS157 variants?
No, SN74LV157APWG4 is not pin-compatible with SN74LS157. While both are quad 2:1 multiplexers, SN74LS157 uses a different pinout (e.g., strobe on pin 5, separate enables per channel) and TTL-level thresholds. SN74LV157APWG4 follows the LV-A logic family pin mapping shown in Figure 5-1, with G on pin 15 and unified A/B on pin 1 - requiring PCB layout revision for migration.
What package type does SN74LV157APWG4 use, and what are its key mechanical dimensions?
SN74LV157APWG4 uses the TSSOP-16 (PW) package: 5.0 mm × 4.4 mm body size, 0.65 mm lead pitch, and 1.2 mm maximum height. Its JEDEC MO-153 compliant outline supports automated SMT assembly, and the RoHS-compliant NIPDAU lead finish ensures reliable solderability under standard reflow profiles (MSL Level-1).
SN74LV157APWG4 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
SN74LV157APWG4 FAQ
1.How can I place an order for SN74LV157APWG4 through Aetrix?
Please submit a Request for Quotation (RFQ) for SN74LV157APWG4 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 SN74LV157APWG4 reliable?
The price and inventory of SN74LV157APWG4 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SN74LV157APWG4 is usually 5 days.
3.What payment methods are accepted for SN74LV157APWG4?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SN74LV157APWG4 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SN74LV157APWG4?
SN74LV157APWG4 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SN74LV157APWG4 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 SN74LV157APWG4?
For technical support, including SN74LV157APWG4 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SN74LV157APWG4 requirements.
6.How does Aetrix verify that SN74LV157APWG4 is sourced from the original manufacturer or authorized distributors?
All SN74LV157APWG4 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 SN74LV157APWG4 meets industry standards.
7.What is the process for return or replacement of SN74LV157APWG4?
All SN74LV157APWG4 units undergo pre-shipment inspection (PSI). If there is an issue with SN74LV157APWG4, 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 SN74LV157APWG4 part is unused and in its original packaging.
Return procedure for SN74LV157APWG4:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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