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Texas Instruments SN74LV157ADG4
- Part No.:
- SN74LV157ADG4
- Manufacturer:
- Texas Instruments
- Category:
- Signal Switches, Multiplexers, Decoders
- Package:
- 16-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
SN74LV157ADG4.pdf
- Description:
- IC DATASELCT/MUX 2-1 QUAD 16SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:1,040
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Product details
Overview
SN74LV157ADG4 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 latch-up immunity >100 mA per JESD78 Class II. It routes four independent 2:1 data paths under shared address (A/B) and active-low strobe (G) control in telecom infrastructure and LED display systems.
For engineers reviewing the SN74LV157ADG4 datasheet, SN74LV157ADG4 pinout, SN74LV157ADG4 application, or SN74LV157ADG4 equivalent, key selection criteria include its 16-pin TSSOP package (PW), 2–5.5 V supply flexibility, 5.5 V input tolerance, sub-8 ns tpd at 5 V, and compatibility with mixed-voltage logic interfacing in space-constrained industrial control and network switch designs.
Technical Context
The SN74LV157ADG4 implements four independent 2:1 multiplexers with true (non-inverted) output logic and a common active-low output enable (G). Each channel selects between two inputs (A or B) based on the A/B select line, with all outputs disabled when G is high.
Its design supports mixed-voltage operation: inputs tolerate up to 5.5 V regardless of VCC (2–5.5 V), enabling seamless interfacing with legacy 5 V logic while powered from modern 3.3 V or 2.5 V rails. Output drive strength scales with VCC, delivering ±12 mA at 5 V and ±2 mA at 2.3 V.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCC Range | 2 V to 5.5 V - enables single-supply operation across 2.5 V, 3.3 V, and 5 V logic domains |
| Max Propagation Delay | 7.5 ns at VCC = 5 V, CL = 15 pF - ensures timing-critical data routing in high-speed digital control paths |
| Input Voltage Tolerance | Up to 5.5 V - allows direct connection to 5 V signals without level shifters when VCC ≥ 2 V |
| Output Drive Current | ±12 mA at VCC = 4.5–5.5 V - sufficient to drive multiple CMOS loads or small LED segments directly |
| Latch-up Immunity | >100 mA per JESD78 Class II - guarantees robustness against transient current faults in noisy industrial environments |
| Operating Temperature | –40°C to +85°C - qualified for extended temperature operation in telecom and motor control applications |
Pinout & Package
TSSOP-16 (PW) package, 5.0 mm × 4.4 mm body size, 1.2 mm max height, lead pitch 0.65 mm, RoHS-compliant NIPDAU finish, MSL Level-1.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 A/B | Global select input | Controls all four channels simultaneously: selects input A (low) or B (high) for each Y output |
| 2–3, 5–6, 10–11, 13–14 | Data inputs (1A/1B, 2A/2B, 3A/3B, 4A/4B) | Eight dedicated data lines - two per channel, accepting 5.5 V-tolerant logic levels |
| 4, 7, 9, 12 | Data outputs (1Y, 2Y, 3Y, 4Y) | Four true (non-inverted) outputs - driven only when G = low; high-impedance otherwise |
| 8 GND | Ground reference | Primary return path for all I/O and internal circuitry; requires low-inductance PCB connection |
| 15 G | Active-low output enable | Strobes all outputs: Y = high-Z when G = high; Y = selected data when G = low |
| 16 VCC | Positive supply | Single power rail (2–5.5 V); requires local 0.1 µF bypass capacitor per TI layout guidelines |
Key Features
| Feature | Design Value |
|---|---|
| Wide supply range | 2 V to 5.5 V operation - eliminates need for separate voltage rails in mixed-signal systems |
| 5.5 V-tolerant inputs | Accepts 5 V logic signals even at VCC = 2.5 V - removes external level translators in legacy interface designs |
| Low propagation delay | 7.5 ns max at 5 V - meets timing budgets in 100+ MHz data path control logic |
| High noise immunity | Typical VOLP < 0.8 V and VOHV > 2 V at VCC = 5 V - suppresses ground bounce and undershoot in dense PCB layouts |
| JESD78 Class II latch-up | >100 mA immunity - prevents destructive failure during ESD events or power sequencing glitches |
Applications
| Telecom Infrastructure | LED Display Drivers |
|---|---|
Use Scenario: Signal routing in packet-switched backplanes where multiple data sources feed a shared processing unit. IC Role / Device Role / Timing Role: Quad 2:1 multiplexer selecting between redundant or alternate signal paths under FPGA or microcontroller control. Use Value: Enables dynamic reconfiguration of signal flow without hardware changes, leveraging 7.5 ns tpd to maintain system-level timing integrity. | Use Scenario: Column driver selection in segmented LED signage requiring fast switching between character sets or brightness profiles. IC Role / Device Role / Timing Role: Data selector routing precomputed segment patterns from dual memory banks to LED column drivers. Use Value: Supports flicker-free animation by minimizing inter-frame delay; 5.5 V input tolerance allows direct interface with legacy 5 V display controllers. |
| Network Switches | Motor Driver Control Logic |
Use Scenario: Port status arbitration in managed Ethernet switches where PHY register reads are multiplexed across multiple ports. IC Role / Device Role / Timing Role: Quad data selector consolidating MDIO bus responses from four PHYs onto a single controller interface. Use Value: Reduces MCU GPIO count and simplifies firmware polling logic while maintaining sub-10 ns timing margins for MDIO compliance. | Use Scenario: Direction and enable signal routing in multi-axis stepper motor driver boards with configurable step modes. IC Role / Device Role / Timing Role: Multiplexing between microcontroller-generated and hardware-fault override signals for H-bridge gate control. Use Value: Ensures fail-safe operation by allowing hardware-level takeover during software lockup; latch-up immunity protects against motor back-EMF transients. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar 2:1 multiplexer applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SN74LVCH157A | Includes bus-hold circuitry on all inputs; identical pinout and electrical specs otherwise | Better suited for systems with unterminated or long trace inputs where floating states must be avoided | Select SN74LVCH157A if input traces exceed 5 cm or lack pull resistors; otherwise SN74LV157ADG4 offers lower quiescent current |
| 74LVC157PW | Same function and pinout but specified only for 1.65–3.6 V VCC; no 5.5 V input tolerance | Restricted to 3.3 V-only systems; cannot interface with 5 V logic without external translation | Choose 74LVC157PW only in fully 3.3 V domains where cost sensitivity outweighs voltage flexibility needs |
Compared with SN74LVCH157A and 74LVC157PW, SN74LV157ADG4 uniquely combines 2–5.5 V operation, 5.5 V-tolerant inputs, and zero-bus-hold leakage-making it optimal for mixed-voltage industrial control where reliability and interface simplicity are prioritized over ultra-low static power.
Availability
SN74LV157ADG4 is available at Aetrix Electronics and suitable for telecom infrastructure, LED display drivers, and network switch applications requiring stable component supply, long-term lifecycle support, and RoHS-compliant packaging.
Supply support for SN74LV157ADG4 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 broad industrial and automotive qualification.
The SN74LV157ADG4 belongs to the LV family of low-voltage logic devices designed for robust, wide-supply-range operation in industrial control, communications, and consumer electronics where mixed-voltage interoperability and latch-up immunity are critical.
FAQ
What is the maximum operating voltage for SN74LV157ADG4 inputs?
The SN74LV157ADG4 inputs accept voltages up to 5.5 V regardless of VCC level, enabling direct interfacing with 5 V logic signals even when powered from 2.5 V or 3.3 V supplies. This eliminates the need for external level-shifting circuitry in mixed-voltage systems and is explicitly specified in the Absolute Maximum Ratings table of the official datasheet.
Does SN74LV157ADG4 support hot insertion?
SN74LV157ADG4 supports hot insertion due to its 5.5 V-tolerant inputs and Ioff protection (≤5 µA at VCC = 0 V), which prevents back-driving powered circuits during live board insertion. The device maintains high-impedance outputs when VCC is unpowered, satisfying JEDEC JESD8-11 requirements for hot-plug capable logic.
What is the typical output ground bounce (VOLP) of SN74LV157ADG4?
The typical output ground bounce (VOLP) of SN74LV157ADG4 is less than 0.8 V at VCC = 5 V and TA = 25°C, as measured under standard switching conditions. This low VOLP value minimizes noise coupling into adjacent signal paths and improves signal integrity in high-density PCB layouts with shared ground planes.
Can SN74LV157ADG4 operate reliably at –40°C?
Yes, SN74LV157ADG4 is fully specified and tested for reliable operation across –40°C to +85°C, meeting industrial temperature grade requirements. Its electrical characteristics-including propagation delay, output drive, and input thresholds-are guaranteed over this full range, making it suitable for outdoor telecom equipment and factory automation systems.
Is SN74LV157ADG4 pin-compatible with older 74LS157 variants?
No, SN74LV157ADG4 is not pin-compatible with 74LS157 due to differences in pin assignment: the LS157 uses pin 1 as 1A and pin 2 as 1B, whereas SN74LV157ADG4 assigns pin 1 to A/B select and pins 2–3 to 1A/1B. Physical substitution would cause functional failure; redesign is required for migration from LS to LV families.
SN74LV157ADG4 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- 74LV
- Package/Case:
- 16-SOIC (0.154", 3.90mm Width)
- Packaging:
- Tube
- Product Status:
- Active
- 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-SOIC
SN74LV157ADG4 FAQ
1.How can I place an order for SN74LV157ADG4 through Aetrix?
Please submit a Request for Quotation (RFQ) for SN74LV157ADG4 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 SN74LV157ADG4 reliable?
The price and inventory of SN74LV157ADG4 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SN74LV157ADG4 is usually 5 days.
3.What payment methods are accepted for SN74LV157ADG4?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SN74LV157ADG4 transactions.
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4.How is shipping managed for SN74LV157ADG4?
SN74LV157ADG4 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SN74LV157ADG4 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 SN74LV157ADG4?
For technical support, including SN74LV157ADG4 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SN74LV157ADG4 requirements.
6.How does Aetrix verify that SN74LV157ADG4 is sourced from the original manufacturer or authorized distributors?
All SN74LV157ADG4 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 SN74LV157ADG4 meets industry standards.
7.What is the process for return or replacement of SN74LV157ADG4?
All SN74LV157ADG4 units undergo pre-shipment inspection (PSI). If there is an issue with SN74LV157ADG4, 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 SN74LV157ADG4 part is unused and in its original packaging.
Return procedure for SN74LV157ADG4:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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