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Texas Instruments SN74LVT125PWR
- Part No.:
- SN74LVT125PWR
- Manufacturer:
- Texas Instruments
- Package:
- 14-TSSOP (0.173", 4.40mm Width)
- Datasheet:
-
SN74LVT125PWR.pdf
- Description:
- IC BUF NON-INVERT 3.6V 14TSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:3,599
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Product details
Overview
SN74LVT125PWR from Texas Instruments is a quad 3-state noninverting buffer designed for mixed-voltage system interfacing, supporting 5-V TTL inputs/outputs with 3.3-V VCC, operating down to 2.7 V, and featuring bus-hold inputs and Ioff for partial-power-down protection - used in FPGA-to-ASIC voltage translation and industrial control backplanes.
For engineers reviewing the SN74LVT125PWR datasheet, SN74LVT125PWR pinout, SN74LVT125PWR application, or SN74LVT125PWR equivalent, key selection considerations include its 3.3-V supply compatibility with 5-V signal tolerance, 2.7–3.6-V operating range, bus-hold input retention, Ioff current limiting, and TSSOP-14 package thermal performance (θJA = 113°C/W).
Technical Context
The SN74LVT125PWR implements four independent noninverting buffers, each with active-low 3-state output enable (OE), enabling selective bus isolation. Its bus-hold circuitry actively maintains logic state on undriven inputs without external resistors, reducing BOM count and layout complexity.
Designed for mixed-mode operation, it accepts 5-V-tolerant inputs while powered from 3.3-V VCC, and features Ioff protection that disables outputs and limits reverse current during power-down - critical for hot-swap and multi-rail systems where sequencing is uncontrolled.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCC Range | 2.7 V to 3.6 V - supports unregulated battery operation and accommodates 10% supply tolerance in portable and industrial systems. |
| Input Voltage Tolerance | −0.5 V to 7 V - enables direct connection to 5-V TTL logic without level-shifting components. |
| tPLH/tPHL | 1 ns (min) to 4.9 ns (max) at VCC = 3.3 V - ensures sub-5-ns propagation delay for high-speed data path buffering in clock domains up to ~100 MHz. |
| Ioff | ±100 µA max at VCC = 0 - prevents damaging backflow current when powered down, satisfying JEDEC JESD-78 requirements for partial-power-down safety. |
| Bus-Hold Current | ±75 µA at VCC = 3 V - actively retains input logic state without pullup/pulldown resistors, eliminating floating-input risk in unterminated buses. |
| Output Drive | IOL = 64 mA, IOH = −32 mA - drives standard TTL loads and multiple CMOS inputs while maintaining VOL ≤ 0.55 V and VOH ≥ 2.0 V. |
| Thermal Resistance | θJA = 113°C/W (TSSOP-PW) - defines maximum junction temperature rise under typical PCB copper area, guiding thermal derating in compact layouts. |
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 not present, RoHS-compliant NiPdAu finish, MSL Level-1.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 4, 10, 13 | OE (Output Enable) | Active-low control per buffer; high = high-impedance output; tied to VCC via pullup for power-up safety. |
| 2, 5, 11, 14 | A (Data Input) | Noninverting input with bus-hold; retains last valid logic state when floating - eliminates need for external biasing. |
| 3, 6, 12, 9 | Y (Output) | 3-state buffered output; driven high/low when OE low; high-Z when OE high - enables shared-bus contention avoidance. |
| 7 | GND | Ground reference for all internal circuitry and output drivers; must be low-impedance connection to minimize ground bounce (VOLP < 0.8 V). |
| 14 | VCC | 3.3-V supply input; decoupling capacitor (0.1 µF ceramic) required within 1 cm to suppress switching noise and ensure stable operation. |
Key Features
| Feature | Design Value |
|---|---|
| Mixed-mode voltage interface | Accepts 5-V TTL inputs while powered from 3.3-V VCC, enabling seamless interconnection between legacy and low-voltage logic families. |
| Bus-hold inputs | Eliminates external pullup/pulldown resistors on A inputs, reducing component count and board space in high-density digital backplanes. |
| Ioff partial-power-down protection | Disables outputs and limits reverse current to ±100 µA when VCC = 0, preventing damage during hot-insertion or asymmetric power sequencing. |
| Low ground bounce | VOLP < 0.8 V at VCC = 3.3 V, TA = 25°C - minimizes noise coupling into adjacent signals and improves signal integrity in fast-switching applications. |
| Latch-up immunity | Exceeds 500 mA per JEDEC JESD-17 - ensures robustness against transient overvoltage events in industrial environments. |
Applications
| Industrial PLC Backplane Interface | FPGA I/O Voltage Translation |
|---|---|
Use Scenario: Interfacing 5-V field I/O modules to a 3.3-V FPGA-based controller in programmable logic controllers. IC Role / Device Role / Timing Role: Quad noninverting buffer providing level-shifted, isolated data paths between voltage domains with bus-hold retention during configuration gaps. Use Value: Eliminates discrete level shifters and pull resistors, reduces PCB layer count, and ensures deterministic input state during FPGA reconfiguration. |
Use Scenario: Driving 5-V TTL-compatible peripherals (e.g., legacy ADCs, displays) from a 3.3-V FPGA bank with limited drive strength. IC Role / Device Role / Timing Role: Output buffer with 3-state control synchronized to FPGA output enable, delivering 64-mA sink capability and 5-V-tolerant inputs for status feedback. Use Value: Enables direct peripheral connectivity without external translators, preserving timing margins with sub-5-ns propagation delay and controlled edge rates. |
| Automotive Body Control Module Bus Isolation | Test Equipment Signal Conditioning |
Use Scenario: Isolating diagnostic communication lines (e.g., UART, LIN) between 3.3-V microcontroller and 5-V sensor clusters in body control units. IC Role / Device Role / Timing Role: Directionally agnostic buffer with Ioff protection, allowing safe power cycling of one subsystem without affecting the other. Use Value: Prevents backfeed current during module sleep/wake transitions, meeting ISO 16750-2 load-dump and battery-disconnect robustness requirements. |
Use Scenario: Conditioning high-speed digital test signals (e.g., pattern generator outputs) before routing to DUTs with mismatched voltage thresholds. IC Role / Device Role / Timing Role: Low-skew, low-capacitance (Ci = 4 pF, Co = 8 pF) buffer driving multiple parallel loads while maintaining signal fidelity. Use Value: Reduces signal degradation and timing jitter across fanout paths, improving test repeatability and pass/fail margin in ATE systems. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar quad noninverting buffer applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SN74LVTH125PWRE4 | Lower VCC min (2.7 V same), but LVTH family offers higher drive (IOL = 12 mA typ vs. 64 mA max) and no bus-hold - requires external biasing. | Best suited for cost-sensitive, low-power applications where bus-hold is unnecessary and drive demand is modest. | Select SN74LVTH125PWRE4 only if bus-hold is unused and lower ICC (0.1 mA typ) outweighs reduced drive and missing Ioff. |
| SN74ALVC125PW | Wider VCC range (1.65–3.6 V), no 5-V input tolerance, no bus-hold, and no Ioff; higher speed (tpd = 2.5 ns typ) but less robust in mixed-voltage contexts. | Targeted at pure 1.8-/2.5-/3.3-V systems with tight timing budgets and no legacy interface requirements. | Choose SN74ALVC125PW only in single-supply 3.3-V designs where 5-V tolerance and power-down safety are irrelevant. |
Compared with SN74LVTH125PWRE4 and SN74ALVC125PW, the SN74LVT125PWR uniquely combines 5-V input tolerance, bus-hold, and Ioff in a single TSSOP-14 package - making it the only option among the three for reliable mixed-voltage hot-swap interfaces without redesigning biasing or sequencing.
Availability
SN74LVT125PWR is available at Aetrix Electronics and suitable for industrial automation, test equipment, and automotive body electronics requiring stable component supply, long-term lifecycle support, and RoHS-compliant packaging.
Supply support for SN74LVT125PWR 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 expertise in high-reliability interface ICs and industrial-grade timing products.
The SN74LVT125PWR belongs to TI's LVT (Low-Voltage BiCMOS Technology) logic family, engineered specifically for mixed-signal system interfacing where 3.3-V core logic must communicate reliably with 5-V legacy peripherals.
FAQ
What is the maximum input voltage the SN74LVT125PWR can tolerate?
The SN74LVT125PWR supports input voltages from −0.5 V to 7 V, enabling direct connection to 5-V TTL logic without level-shifting circuitry. This 5-V tolerance is maintained across the full operating temperature range (−40°C to 85°C) and does not require external clamping diodes or series resistors.
Does the SN74LVT125PWR require external pullup resistors on its inputs?
No - the SN74LVT125PWR integrates bus-hold circuitry on all A inputs, actively retaining the last valid logic state when inputs are floating or undriven. Using external pullup or pulldown resistors with bus-hold enabled is explicitly discouraged in the datasheet, as it may cause contention and increased power consumption.
How does the Ioff feature protect the SN74LVT125PWR during partial power-down?
The Ioff circuitry in the SN74LVT125PWR disables all outputs and limits reverse current to ±100 µA when VCC = 0, preventing damaging backflow through the device when one side of a mixed-rail interface loses power. This satisfies JEDEC JESD-78 requirements for safe hot-swap operation.
What is the thermal performance of the SN74LVT125PWR in its TSSOP-14 package?
The SN74LVT125PWR in TSSOP-14 (PW) package has a junction-to-ambient thermal resistance θJA of 113°C/W under standard JEDEC test conditions. This value assumes a two-layer PCB with 1-in² copper pour; actual thermal performance improves with additional copper area, thermal vias, or airflow.
Can the SN74LVT125PWR be used in automotive applications?
The standard SN74LVT125PWR is rated for −40°C to 85°C operation and meets industrial reliability standards, but for automotive applications requiring AEC-Q100 qualification, TI offers the pin-compatible SN74LVT125-Q1 variant. The SN74LVT125PWR itself is not AEC-Q100 qualified and should not be deployed in safety-critical vehicle systems without additional validation.
SN74LVT125PWR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- 74LVT
- Package/Case:
- 14-TSSOP (0.173", 4.40mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- 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
SN74LVT125PWR FAQ
1.How can I place an order for SN74LVT125PWR through Aetrix?
Please submit a Request for Quotation (RFQ) for SN74LVT125PWR 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 SN74LVT125PWR reliable?
The price and inventory of SN74LVT125PWR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SN74LVT125PWR is usually 5 days.
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SN74LVT125PWR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SN74LVT125PWR 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 SN74LVT125PWR?
For technical support, including SN74LVT125PWR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SN74LVT125PWR requirements.
6.How does Aetrix verify that SN74LVT125PWR is sourced from the original manufacturer or authorized distributors?
All SN74LVT125PWR 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 SN74LVT125PWR meets industry standards.
7.What is the process for return or replacement of SN74LVT125PWR?
All SN74LVT125PWR units undergo pre-shipment inspection (PSI). If there is an issue with SN74LVT125PWR, 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 SN74LVT125PWR part is unused and in its original packaging.
Return procedure for SN74LVT125PWR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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