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Texas Instruments SN74LVTH125PWRG4
- Part No.:
- SN74LVTH125PWRG4
- Manufacturer:
- Texas Instruments
- Package:
- 14-TSSOP (0.173", 4.40mm Width)
- Datasheet:
-
SN74LVTH125PWRG4.pdf
- Description:
- IC BUF NON-INVERT 3.6V 14TSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:4,097
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Product details
Overview
SN74LVTH125PWRG4 from Texas Instruments is a quad 3-state noninverting buffer designed for mixed-voltage bus interfacing between 3.3-V logic and 5-V TTL systems. It supports VCC down to 2.7 V, delivers 64 mA sink current per output, features bus-hold on all data inputs, and enables hot insertion via Ioff and power-up 3-state. It is used in industrial backplane interface modules requiring level translation and bus contention control.
For engineers reviewing the SN74LVTH125PWRG4 datasheet, SN74LVTH125PWRG4 pinout, SN74LVTH125PWRG4 application, or SN74LVTH125PWRG4 equivalent, key selection criteria include 3.3-V supply compatibility with 5-V tolerant inputs, guaranteed 2.7–3.6 V operating range, bus-hold functionality eliminating external resistors, hot-swap support, and TSSOP-14 package thermal performance (θJA = 113°C/W).
Technical Context
The SN74LVTH125PWRG4 implements four independent noninverting buffers, each with dedicated 3-state output-enable (OE) control. Its TTL-compatible input thresholds (VIH = 2 V, VIL = 0.8 V) allow direct connection to legacy 5-V logic while operating from a 3.3-V supply.
Bus-hold circuitry actively maintains valid logic states on undriven inputs without external pull resistors, and Ioff protection blocks current flow when powered down-critical for live-insertion in modular systems. Power-up 3-state ensures outputs remain high-impedance during VCC ramp-up.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCC Range | 2.7 V to 3.6 V - Enables stable operation across unregulated battery supplies and noisy industrial rails. |
| IOL / IOH | 64 mA / −32 mA - Sustains robust drive strength into heavy capacitive loads or multiple TTL inputs. |
| Input Voltage Tolerance | Up to 5.5 V - Permits direct connection to 5-V buses without level-shifting components. |
| tPLH / tPHL | Typ. 2 ns at VCC = 3.3 V - Supports >200 MHz data rates in short-bus applications. |
| Bus-Hold Current | ±500 µA max - Actively holds floating inputs at valid logic levels, removing need for external biasing. |
| ESD Rating | 2000-V HBM, 200-V MM - Meets industrial handling requirements without additional protection circuitry. |
| Thermal Resistance | θJA = 113°C/W (TSSOP) - Defines maximum power dissipation limit under standard PCB layout conditions. |
Pinout & Package
TSSOP-14 (PW) package: 4.4 mm × 5.0 mm body, 0.65 mm lead pitch, 1.2 mm max height, exposed pad optional, JEDEC MO-153 compliant.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 4, 10, 13 | Output Enable (1OE, 2OE, 3OE, 4OE) | Active-low control: high = high-Z output; enables hot-swap isolation per channel. |
| 2, 5, 11, 14 | Data Input (1A, 2A, 3A, 4A) | 5-V tolerant inputs with bus-hold; no external pullup/pulldown required. |
| 3, 6, 12, 9 | Buffer Output (1Y, 2Y, 3Y, 4Y) | Noninverting 3-state outputs capable of driving 5-V TTL loads at 3.3-V VCC. |
| 7 | GND | Ground reference for all logic and output stages; decoupling capacitor placement critical. |
| 14 | VCC | 3.3-V supply input; requires local 0.1 µF ceramic decoupling adjacent to pin. |
Key Features
| Feature | Design Value |
|---|---|
| Mixed-mode signal operation | 3.3-V VCC with 5-V input/output voltage tolerance enables seamless 3.3/5-V system bridging. |
| Bus-hold on all data inputs | Eliminates external pull resistors, reduces BOM count, and prevents floating-input metastability. |
| Ioff and power-up 3-state | Prevents backdrive current during hot insertion and forces high-Z state during power transitions. |
| Low ground bounce (VOLP < 0.8 V) | Minimizes noise coupling into shared ground planes in dense multi-buffer layouts. |
| Latch-up immunity > 500 mA | Ensures robustness against transient overvoltage events in industrial environments. |
Applications
| Industrial Backplane Interface | Hot-Swappable Module Control |
|---|---|
Use Scenario: Interfacing FPGA I/O banks (3.3-V LVCMOS) to legacy 5-V TTL control buses in programmable logic controllers. IC Role / Device Role / Timing Role: Level-translating buffer with bus-hold and 3-state control to isolate modules during reconfiguration. Use Value: Eliminates discrete level shifters and pull resistors, reducing board area by ~12 mm² per channel. | Use Scenario: Enabling live insertion of I/O expansion cards into powered rack-mounted chassis. IC Role / Device Role / Timing Role: Hot-insertion guard IC providing Ioff isolation and power-up 3-state sequencing. Use Value: Prevents bus contention and backdrive damage during card mating, meeting IEC 61000-4-2 compliance without extra protection ICs. |
| Embedded Data Acquisition Bus | Test Equipment Signal Conditioning |
Use Scenario: Driving multiplexed analog-to-digital converter (ADC) control lines from a low-voltage microcontroller. IC Role / Device Role / Timing Role: Noninverting buffer with fast propagation delay (2 ns typ.) and low skew across channels. Use Value: Ensures synchronous sampling timing integrity across 4-channel ADC trigger paths. | Use Scenario: Isolating digital control signals (e.g., range select, calibration enable) in automated test equipment. IC Role / Device Role / Timing Role: 3-state buffer enabling shared control bus access among multiple instrument subsystems. Use Value: Allows dynamic bus arbitration without signal contention, supporting multi-instrument parallel test sequences. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar quad noninverting buffer applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SN74LVC125APWR | Lower drive (24 mA), no bus-hold, 1.65–3.6 V VCC range, no 5-V input tolerance. | Suitable only for pure 3.3-V systems without legacy TTL interfacing. | Select when cost sensitivity outweighs mixed-voltage capability and bus-hold is unnecessary. |
| SN74AHCT125PWR | 5-V VCC only, TTL-compatible inputs/outputs, higher propagation delay (7 ns typ.), no bus-hold. | Requires 5-V rail; incompatible with 3.3-V-only designs or battery-powered systems. | Choose only if existing 5-V infrastructure prohibits voltage translation and bus-hold is not required. |
Compared with SN74LVC125APWR and SN74AHCT125PWR, the SN74LVTH125PWRG4 uniquely combines 3.3-V operation, 5-V input tolerance, bus-hold, and hot-swap support-making it the sole option for robust mixed-voltage backplane interfaces where reliability and component count reduction are critical.
Availability
SN74LVTH125PWRG4 is available at Aetrix Electronics and suitable for industrial automation, test equipment, and embedded data acquisition systems requiring stable component supply, long-term lifecycle assurance, and RoHS-compliant packaging.
Supply support for SN74LVTH125PWRG4 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 solutions for industrial, automotive, and communications markets.
The SN74LVTH125PWRG4 belongs to TI's LVTH logic family, engineered for mixed-voltage bus interfacing in harsh environments where reliability, hot-swap capability, and reduced external component count are essential design goals.
FAQ
What is the minimum VCC voltage required for reliable operation of the SN74LVTH125PWRG4?
The SN74LVTH125PWRG4 is fully specified from 2.7 V to 3.6 V. At VCC = 2.7 V, it guarantees VIH = 2.0 V, VIL = 0.8 V, and IOL = 48 mA - making it suitable for brownout-prone battery-powered systems. Operation below 2.7 V places outputs in high-impedance but does not ensure functional logic behavior.
Does the SN74LVTH125PWRG4 require external pullup resistors on its inputs?
No. The SN74LVTH125PWRG4 integrates active bus-hold circuitry on all data inputs (1A–4A), maintaining valid logic states without external resistors. Using pullup/pulldown resistors with enabled bus-hold is explicitly discouraged in the datasheet due to potential current conflict and increased power draw.
Can the SN74LVTH125PWRG4 safely interface with 5-V logic while powered from 3.3 V?
Yes. The SN74LVTH125PWRG4 accepts input voltages up to 5.5 V regardless of VCC level, and its outputs swing rail-to-rail (VOH ≈ VCC, VOL ≈ 0 V) while sourcing/sinking TTL-compatible currents. This allows direct connection to 5-V buses without level shifters or clamping diodes.
What thermal considerations apply to the SN74LVTH125PWRG4 in TSSOP-14 package?
The SN74LVTH125PWRG4 in TSSOP-14 has θJA = 113°C/W under JEDEC JESD 51-7 conditions. With typical ICC = 4.5–7 mA and worst-case IOL = 64 mA, power dissipation remains under 250 mW. Adequate copper pour and thermal vias beneath the exposed pad (if present) are recommended for sustained high-drive operation.
How does the SN74LVTH125PWRG4 support hot insertion in modular systems?
The SN74LVTH125PWRG4 supports hot insertion through two integrated features: Ioff circuitry disables outputs when VCC = 0 V, preventing backflow current into powered subsystems; and power-up 3-state holds outputs high-impedance until VCC exceeds 1.5 V, avoiding bus conflicts during power ramp-up.
SN74LVTH125PWRG4 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- 74LVTH
- Package/Case:
- 14-TSSOP (0.173", 4.40mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Discontinued at Digi-Key
- Logic Type:
- Buffer, Non-Inverting
- Number of Elements:
- 4
- Number of Bits per Element:
- 1
- Input Type:
- -
- Output Type:
- 3-State
- Current - Output High, Low:
- 32mA, 64mA
- Voltage - Supply:
- 2.7V ~ 3.6V
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 14-TSSOP
SN74LVTH125PWRG4 FAQ
1.How can I place an order for SN74LVTH125PWRG4 through Aetrix?
Please submit a Request for Quotation (RFQ) for SN74LVTH125PWRG4 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 SN74LVTH125PWRG4 reliable?
The price and inventory of SN74LVTH125PWRG4 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SN74LVTH125PWRG4 is usually 5 days.
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Once your SN74LVTH125PWRG4 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 SN74LVTH125PWRG4?
For technical support, including SN74LVTH125PWRG4 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SN74LVTH125PWRG4 requirements.
6.How does Aetrix verify that SN74LVTH125PWRG4 is sourced from the original manufacturer or authorized distributors?
All SN74LVTH125PWRG4 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 SN74LVTH125PWRG4 meets industry standards.
7.What is the process for return or replacement of SN74LVTH125PWRG4?
All SN74LVTH125PWRG4 units undergo pre-shipment inspection (PSI). If there is an issue with SN74LVTH125PWRG4, 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 SN74LVTH125PWRG4 part is unused and in its original packaging.
Return procedure for SN74LVTH125PWRG4:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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