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Texas Instruments SN74LVC157APWR
- Part No.:
- SN74LVC157APWR
- Manufacturer:
- Texas Instruments
- Category:
- Signal Switches, Multiplexers, Decoders
- Package:
- 16-TSSOP (0.173", 4.40mm Width)
- Datasheet:
-
SN74LVC157APWR.pdf
- Description:
- IC MULTIPLEXER 4 X 2:1 16TSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:3,038
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Product details
Overview
SN74LVC157APWR 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 switch in digital signal routing applications such as bus arbitration and data path selection in microcontroller peripheral interfaces.
For engineers reviewing the SN74LVC157APWR datasheet, SN74LVC157APWR pinout, SN74LVC157APWR application, or SN74LVC157APWR equivalent, key selection criteria include its 16-pin TSSOP (PW) package, 3.3V-compatible operation with 5V input tolerance, low propagation delay, output enable strobe (G), and quadruple independent 2:1 channel structure.
Technical Context
The SN74LVC157APWR implements four independent 2:1 multiplexer channels sharing a common active-low output strobe (G) and address select (A/B) control line. 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 input (A or B) per channel.
Its CMOS LVC process enables 5.5V-tolerant inputs while operating from 1.65V–3.6V VCC, supporting mixed-voltage system interfacing between 3.3V logic and legacy 5V peripherals. Input transition rate is specified at 10 ns/V, and output drive capability reaches ±24mA at 3V.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage Range | 1.65V to 3.6V - Enables direct integration into 3.3V systems and compatibility with battery-powered or low-power embedded designs. |
| Max Propagation Delay | 5.2ns at 3.3V - Supports high-speed data routing in real-time control loops and fast peripheral switching. |
| Input Voltage Tolerance | Up to 5.5V - Allows safe connection to 5V TTL or CMOS outputs without level-shifting circuitry. |
| Operating Temperature | –40°C to 125°C - Qualified for industrial and automotive under-hood applications requiring extended thermal robustness. |
| Output Drive Strength | ±24mA at VCC = 3V - Sufficient to drive multiple standard CMOS loads or small capacitive buses directly. |
| ESD Protection | ±2000V HBM, ±1000V CDM - Meets JEDEC JESD22 standards for reliable handling in automated assembly and field environments. |
| Power Dissipation | 500mW at TA ≤ 125°C - Enables stable operation in compact PCB layouts without forced cooling. |
Pinout & Package
Packaged in a 16-pin Thin Shrink Small Outline Package (TSSOP, PW), SN74LVC157APWR measures 5.00 mm × 6.4 mm with 0.65 mm lead pitch and exposed thermal pad (not electrically connected).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (G) | Active-low output strobe | When high, forces all outputs (1Y–4Y) low; enables/disables entire multiplexer function synchronously. |
| 2 (1A), 3 (1B), 4 (1Y) | Channel 1 data inputs and output | 1A/1B feed two data sources; 1Y delivers selected source based on A/B state - fully independent of other channels. |
| 5 (2A), 6 (2B), 7 (2Y) | Channel 2 data inputs and output | Same functional behavior as Channel 1; supports parallel 2:1 selection across four independent data paths. |
| 8 (GND) | Ground reference | Primary return path for all internal logic and output currents; must be low-impedance for noise immunity. |
| 9 (3Y), 10 (3B), 11 (3A) | Channel 3 output and inputs | 3A/3B accept differential or redundant signals; 3Y routes selected input - critical for fault-tolerant I/O design. |
| 12 (4Y), 13 (4B), 14 (4A) | Channel 4 output and inputs | Final channel completes quad-mux set; enables simultaneous selection of four independent 2:1 data pairs. |
| 15 (A/B) | Address select control | Single global control line determining whether all outputs reflect A-inputs (A/B = high) or B-inputs (A/B = low). |
| 16 (VCC) | Positive supply | Supplies core logic and output drivers; requires local 0.1µF bypass capacitor placed adjacent to pin for stable switching. |
Key Features
| Feature | Design Value |
|---|---|
| Quad 2:1 multiplexer architecture | Four independent channels reduce component count vs. discrete mux ICs and simplify PCB routing in multi-signal systems. |
| 5.5V-tolerant inputs on 1.65V–3.6V supply | Eliminates external level shifters when interfacing 5V sensors, legacy peripherals, or industrial I/O modules with 3.3V controllers. |
| Common active-low strobe (G) | Enables synchronized enable/disable of all outputs - essential for glitch-free bus arbitration and power-gated subsystem control. |
| Low ground bounce (VOLP < 0.8V) and undershoot (VOHV > 2V) | Minimizes signal integrity degradation during fast switching, preserving timing margins in high-density digital layouts. |
| Latch-up immunity > 250mA | Ensures robust operation under transient overvoltage or ESD events without destructive latch-up, meeting JESD17 requirements. |
Applications
| Industrial PLC I/O Expansion | Automotive Body Control Module |
|---|---|
Use Scenario: Routing sensor data from dual-redundant analog front-ends to a single ADC input in programmable logic controllers. IC Role / Device Role / Timing Role: Quad 2:1 selector provides fault-tolerant signal path selection with synchronized strobe control for deterministic sampling windows. Use Value: Reduces board space vs. four discrete SPDT switches and eliminates timing skew between channels due to matched propagation delays. | Use Scenario: Selecting between primary and backup CAN transceiver outputs in vehicle gateway ECUs during fail-safe mode transitions. IC Role / Device Role / Timing Role: Acts as a hardware-controlled signal router enabling seamless switchover without software intervention or CPU involvement. Use Value: Achieves sub-microsecond switchover latency and maintains signal integrity across 500kbps CAN FD links via 5.5V-tolerant inputs and low-output impedance. |
| Embedded Microcontroller Peripheral Multiplexing | Test Equipment Signal Path Switching |
Use Scenario: Sharing limited GPIO pins between UART, SPI, and I²C peripherals on resource-constrained ARM Cortex-M0+ MCUs. IC Role / Device Role / Timing Role: Provides hardware-based peripheral selection under firmware control via A/B and G lines, decoupling pin assignment from runtime software overhead. Use Value: Enables dynamic reconfiguration of debug interfaces without reset or reprogramming, improving development agility and field serviceability. | Use Scenario: Configuring automated test fixtures to route DUT signals through calibrated reference paths or attenuators before measurement. IC Role / Device Role / Timing Role: Functions as a precision signal path selector with guaranteed monotonic switching and no break-before-make artifacts. Use Value: Maintains measurement accuracy by eliminating contact resistance variation and ensuring consistent 50Ω impedance matching across all selected paths. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar 2:1 multiplexer applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SN74LVC257APWR | Same pinout and electrical specs but includes three-state outputs (OE control instead of G strobe); higher ICC (40µA max vs. 10µA). | Required where output bus isolation or shared-bus driving is needed; not drop-in for G-controlled disable. | Select SN74LVC257APWR only if three-state functionality is required; otherwise SN74LVC157APWR offers lower quiescent current and simpler control. |
| 74LVC157PW,118 (Nexperia) | Functionally identical 16-pin TSSOP device; same VCC range, propagation delay, and 5.5V-tolerant inputs; RoHS-compliant with NIPDAU finish. | No functional or packaging differences; validated for drop-in replacement in existing TI-designated layouts. | Use 74LVC157PW,118 for second-source assurance in long-lifecycle industrial programs where dual-sourcing is mandated. |
Compared with SN74LVC257APWR and 74LVC157PW,118, the SN74LVC157APWR uniquely combines active-low strobe control, lowest ICC (1µA typical), and TI's extended temperature qualification (–40°C to 125°C), making it optimal for always-on industrial monitoring and automotive body electronics where power and reliability are critical.
Availability
SN74LVC157APWR is available at Aetrix Electronics and suitable for industrial automation, automotive body electronics, and embedded test equipment requiring stable component supply, long-term lifecycle support, and guaranteed RoHS-compliant sourcing.
Supply support for SN74LVC157APWR 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 connectivity technologies, with decades of expertise in logic IC design and high-volume manufacturing.
The SN74LVC157A product line was engineered for low-voltage, high-speed digital signal routing in mixed-voltage systems - targeting industrial control, automotive electronics, and portable instrumentation where power efficiency, noise immunity, and interoperability are essential.
FAQ
What is the maximum input voltage rating for SN74LVC157APWR?
The SN74LVC157APWR supports input voltages up to 5.5V regardless of VCC level, enabling direct interface with 5V logic families without external level-shifting components. This specification is explicitly confirmed in Section 4.1 (Absolute Maximum Ratings) and Section 4.4 (Recommended Operating Conditions) of the official TI datasheet SCAS292S.
Does SN74LVC157APWR support operation at 1.8V supply?
Yes, SN74LVC157APWR is fully specified for 1.65V to 3.6V operation, including 1.8V. At 1.8V ± 0.15V, typical propagation delay is 5.5ns (max 13.5ns) and output drive is ±4mA, as verified in Table 4.9 (Switching Characteristics, SN74LVC157A) of the TI datasheet SCAS292S.
What is the function of the G pin on SN74LVC157APWR?
The G pin (Pin 1) is an active-low output strobe: when high, all four outputs (1Y–4Y) are forced low irrespective of A/B or data inputs; when low, outputs reflect the selected input per channel. This synchronous disable function is documented in Section 6.1 (Overview) and the Function Table in Section 6.3 of the TI datasheet SCAS292S.
Is SN74LVC157APWR pin-compatible with SN74LVC257APWR?
No - although both are 16-pin TSSOP multiplexers, SN74LVC157APWR uses Pin 1 as active-low strobe (G) while SN74LVC257APWR uses Pin 1 as active-low output enable (OE). Their pin functions differ per Table 3-1 (Pin Functions) in the TI datasheet SCAS292S, making them not pin-compatible despite identical package outlines.
What thermal resistance value applies to SN74LVC157APWR in TSSOP (PW) package?
For SN74LVC157APWR in the PW (TSSOP-16) package, the junction-to-ambient thermal resistance (RθJA) is 141.8°C/W, as specified in Table 4.5 (Thermal Information) of the TI datasheet SCAS292S. This value assumes standard JEDEC 2-layer board conditions and guides thermal design for continuous operation up to 125°C ambient.
SN74LVC157APWR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- 74LVC
- Package/Case:
- 16-TSSOP (0.173", 4.40mm 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 ~ 85°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 16-TSSOP
SN74LVC157APWR FAQ
1.How can I place an order for SN74LVC157APWR through Aetrix?
Please submit a Request for Quotation (RFQ) for SN74LVC157APWR 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 SN74LVC157APWR reliable?
The price and inventory of SN74LVC157APWR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SN74LVC157APWR is usually 5 days.
3.What payment methods are accepted for SN74LVC157APWR?
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4.How is shipping managed for SN74LVC157APWR?
SN74LVC157APWR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SN74LVC157APWR 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 SN74LVC157APWR?
For technical support, including SN74LVC157APWR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SN74LVC157APWR requirements.
6.How does Aetrix verify that SN74LVC157APWR is sourced from the original manufacturer or authorized distributors?
All SN74LVC157APWR 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 SN74LVC157APWR meets industry standards.
7.What is the process for return or replacement of SN74LVC157APWR?
All SN74LVC157APWR units undergo pre-shipment inspection (PSI). If there is an issue with SN74LVC157APWR, 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 SN74LVC157APWR part is unused and in its original packaging.
Return procedure for SN74LVC157APWR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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