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Texas Instruments SN74LVC2G157DCUT
- Part No.:
- SN74LVC2G157DCUT
- Manufacturer:
- Texas Instruments
- Category:
- Signal Switches, Multiplexers, Decoders
- Package:
- 8-VFSOP (0.091", 2.30mm Width)
- Datasheet:
-
SN74LVC2G157DCUT.pdf
- Description:
- IC MULTIPLEXER 1 X 2:1 8VSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:7,544
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Product details
Overview
SN74LVC2G157DCUT from Texas Instruments is a single 2-line to 1-line data selector multiplexer in an 8-pin VSSOP package, supporting 1.65-V to 5.5-V supply operation, delivering true and complementary outputs (Y and Y), with 6 ns max propagation delay at 3.3 V and ±24-mA output drive - used for signal routing in sensor interface and digital I/O expansion circuits.
For engineers reviewing the SN74LVC2G157DCUT datasheet, SN74LVC2G157DCUT pinout, SN74LVC2G157DCUT application, or SN74LVC2G157DCUT equivalent, key selection criteria include Ioff-enabled partial-power-down capability, 5.5-V-tolerant inputs for level translation, low ICC (10 µA max), and NanoFree™-compatible VSSOP packaging for space-constrained embedded designs.
Technical Context
The SN74LVC2G157DCUT implements a positive-logic 2:1 multiplexer with active-low common strobe (G) controlling data path enablement: when G is high, both outputs are forced to fixed states (Y = L, Y = H); when G is low, selection between A and B inputs is determined by the A/B control line. It features standard CMOS inputs with 5-pF typical input capacitance and balanced push-pull outputs capable of sourcing/sinking up to 24 mA at 3.3 V.
Its Ioff circuitry ensures outputs enter high-impedance state during power-down, blocking back-drive current and enabling live insertion in hot-swap systems. The device supports down-translation - inputs tolerate up to 5.5 V even when VCC = 1.65 V - and meets JESD 78 Class II latch-up (>100 mA) and JESD 22 ESD ratings (2000-V HBM, 1000-V CDM).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCC Range | 1.65 V to 5.5 V - enables interoperability across mixed-voltage systems (e.g., 1.8-V MCU interfacing with 5-V sensors) |
| Max Propagation Delay | 6 ns at VCC = 3.3 V - supports >100-MHz toggle rates in clean signal paths with ≤50-pF load |
| Output Drive | ±24 mA at VCC = 3.3 V - drives multiple 74LVC inputs or moderate capacitive loads without buffering |
| Ioff Current | ±10 µA max - prevents damaging back-current flow when VCC = 0, critical for partial-power-down architectures |
| Input Voltage Tolerance | Up to 5.5 V independent of VCC - allows direct connection of 5-V signals to lower-VCC logic without external level shifters |
| ICC Supply Current | 10 µA max - minimizes quiescent power in battery-backed or always-on monitoring nodes |
| ESD Rating | 2000-V HBM, 1000-V CDM - exceeds industrial IEC 61000-4-2 system-level immunity requirements for board-level robustness |
Pinout & Package
SN74LVC2G157DCUT uses an 8-pin Very Small Outline Package (VSSOP) with 2.30 mm × 2.00 mm body size and 0.5-mm lead pitch. The package supports fine-pitch PCB assembly and thermal performance characterized by RθJA = 289.9°C/W.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (A) | Data Input A | Primary source input; routed to Y/Y when A/B = L and G = L |
| 2 (B) | Data Input B | Secondary source input; routed to Y/Y when A/B = H and G = L |
| 3 (Y) | Inverted Output | Complementary output - logic inverse of Y; enables differential signaling or dual-rail logic |
| 4 (GND) | Ground Reference | Return path for all internal logic and output currents; must be low-impedance for noise control |
| 5 (Y) | True Output | Non-inverted output reflecting selected input (A or B); drives downstream logic or analog front-end |
| 6 (A/B) | Input Selector | Control line determining source: A when low, B when high - requires defined logic level, not floating |
| 7 (G) | Common Strobe | Enable/disable control: Y/Y forced to L/H when G = H; data path active only when G = L |
| 8 (VCC) | Positive Supply | Power rail defining logic thresholds and output voltage levels; requires local 0.1-µF bypass capacitor |
Key Features
| Feature | Design Value |
|---|---|
| 5.5-V tolerant inputs | Enables direct interfacing of legacy 5-V sensors or microcontrollers to 1.8-V/2.5-V domains without external translators |
| Ioff partial-power-down | Prevents reverse current flow during system sleep or hot-swap events, eliminating need for external isolation switches |
| True + complementary outputs | Provides both Y and Y simultaneously - reduces component count in applications requiring inverted logic (e.g., enable/disable pairs) |
| NanoFree™ VSSOP packaging | Dies-as-packages reduce footprint and thermal resistance vs. traditional plastic packages - ideal for ultra-compact IoT edge nodes |
| Low ground bounce (VOLP < 0.8 V) | Maintains signal integrity during fast switching in multi-load configurations, minimizing false triggering in adjacent circuits |
Applications
| Barcode Scanner Interface | Embedded PC I/O Expansion |
|---|---|
Use Scenario: Multiplexing outputs from multiple linear image sensors or photodiode arrays into a single ADC channel. IC Role / Device Role / Timing Role: Signal selector routing time-multiplexed pixel data streams under microcontroller control via A/B and G pins. Use Value: Reduces PCB layer count and BOM cost by replacing discrete analog switches or larger mux ICs while maintaining 6-ns timing fidelity. |
Use Scenario: Sharing a single UART or SPI bus between two peripheral modules (e.g., temperature sensor and EEPROM) on a compact motherboard. IC Role / Device Role / Timing Role: Digital data selector enabling software-controlled bus arbitration without firmware overhead or additional GPIOs. Use Value: Eliminates need for dual-port memory or complex FPGA logic - leverages existing MCU pins and preserves deterministic latency. |
| Field Transmitter Sensor Hub | Wireless Data Access Card |
Use Scenario: Consolidating digital outputs from temperature and pressure sensors in industrial HVAC field transmitters operating at -40°C to +85°C. IC Role / Device Role / Timing Role: Robust signal router handling 5-V sensor outputs while powered from 3.3-V MCU rail, with Ioff protecting during brownout. Use Value: Ensures reliable operation across wide temperature and voltage ranges while meeting IEC 61000-4-2 ESD immunity targets. |
Use Scenario: Selecting between keyboard/mouse HID reports and LAN controller status signals in USB wireless dongles. IC Role / Device Role / Timing Role: Low-power data switch enabling shared interrupt line and reducing standby current in portable devices. Use Value: Achieves <10-µA system quiescent current in sleep mode due to Ioff and ultra-low ICC, extending battery life. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar 2:1 multiplexer applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SN74LVC1G157DBVR | Single-channel 2:1 mux in SOT-23-6 package; lacks complementary output (Y only); same VCC range and Ioff spec | Requires external inverter if complementary output needed; smaller footprint but higher RθJA (333°C/W) | Select when board space is critical and only true output is required; verify thermal margin in high-density layouts |
| 74LVC2G157GM,132 | Nexperia variant in XSON-8 package; identical logic function and DC specs; slightly higher max tpd (6.5 ns @ 3.3 V) | Same pinout and footprint as DCU; RoHS-compliant with different MSL rating (Level 1 vs TI's Level-1-260C-UNLIM) | Drop-in alternative for supply chain diversification; validate reflow profile compatibility with existing process |
Compared with SN74LVC2G157DCUT, SN74LVC1G157DBVR saves board area but sacrifices design flexibility from missing Y output, while 74LVC2G157GM,132 offers identical functionality with minor timing and packaging differences - making it suitable for second-source qualification without layout change.
Availability
SN74LVC2G157DCUT is available at Aetrix Electronics and suitable for barcode scanner interface, embedded PC I/O expansion, and field transmitter sensor hub applications requiring stable component supply, long-term lifecycle support, and guaranteed traceable sourcing.
Supply support for SN74LVC2G157DCUT 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 50 years of innovation in high-reliability interface and signal-path components.
The SN74LVC2G157DCUT belongs to TI's LVC logic family - designed for low-voltage, high-speed digital signal routing in space-constrained, mixed-voltage industrial and consumer systems where power efficiency and robustness are critical.
FAQ
What is the maximum input voltage the SN74LVC2G157DCUT can tolerate?
The SN74LVC2G157DCUT accepts input voltages up to 5.5 V regardless of VCC level - enabling direct connection of 5-V signals to systems powered at 1.65–3.3 V without external level-shifting circuitry. This tolerance is specified in the Absolute Maximum Ratings table and verified across temperature and process corners.
Does the SN74LVC2G157DCUT support partial-power-down operation?
Yes, the SN74LVC2G157DCUT fully supports partial-power-down via its Ioff feature: when VCC = 0, all outputs enter high-impedance state with leakage limited to ±10 µA, preventing back-current flow from live inputs. This behavior is validated per JESD 78 and documented in Section 8.4 of the datasheet.
What is the function of the G (strobe) pin on the SN74LVC2G157DCUT?
The G pin is a common strobe input that globally enables or disables the multiplexer: when G = HIGH, Y is forced LOW and Y is forced HIGH irrespective of A/B or data inputs; when G = LOW, the device routes either A or B to Y/Y based on the A/B selector. This provides hardware-level gating for synchronous data capture.
Can the SN74LVC2G157DCUT drive a 50-pF capacitive load while meeting timing specs?
Yes - the SN74LVC2G157DCUT is characterized for 50-pF loads at VCC = 3.3 V, delivering ≤6 ns propagation delay. The datasheet explicitly states it meets all specifications with ≤50-pF CMOS loads, and recommends staying ≤70 pF for optimal performance in real-world layouts with trace capacitance.
Is the SN74LVC2G157DCUT pin-compatible with other members of the SN74LVC2Gxx family?
No - the SN74LVC2G157DCUT has a unique 8-pin VSSOP pinout optimized for its 2:1 mux function with true/complementary outputs. Other SN74LVC2Gxx devices (e.g., SN74LVC2G17 buffer or SN74LVC2G74 flip-flop) use different pin assignments and logic functions; direct substitution is not possible without PCB redesign.
SN74LVC2G157DCUT Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- 74LVC
- Package/Case:
- 8-VFSOP (0.091", 2.30mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Type:
- Multiplexer
- Circuit:
- 1 x 2:1
- Independent Circuits:
- 1
- Current - Output High, Low:
- 32mA, 32mA
- Voltage Supply Source:
- Single Supply
- Voltage - Supply:
- 1.65V ~ 5.5V
- Operating Temperature:
- -40°C ~ 85°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-VSSOP
SN74LVC2G157DCUT FAQ
1.How can I place an order for SN74LVC2G157DCUT through Aetrix?
Please submit a Request for Quotation (RFQ) for SN74LVC2G157DCUT 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 SN74LVC2G157DCUT reliable?
The price and inventory of SN74LVC2G157DCUT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SN74LVC2G157DCUT is usually 5 days.
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Once your SN74LVC2G157DCUT 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 SN74LVC2G157DCUT?
For technical support, including SN74LVC2G157DCUT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SN74LVC2G157DCUT requirements.
6.How does Aetrix verify that SN74LVC2G157DCUT is sourced from the original manufacturer or authorized distributors?
All SN74LVC2G157DCUT 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 SN74LVC2G157DCUT meets industry standards.
7.What is the process for return or replacement of SN74LVC2G157DCUT?
All SN74LVC2G157DCUT units undergo pre-shipment inspection (PSI). If there is an issue with SN74LVC2G157DCUT, 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 SN74LVC2G157DCUT part is unused and in its original packaging.
Return procedure for SN74LVC2G157DCUT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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