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Texas Instruments SN74LVT125QPWREP
- Part No.:
- SN74LVT125QPWREP
- Manufacturer:
- Texas Instruments
- Package:
- 14-TSSOP (0.173", 4.40mm Width)
- Datasheet:
-
SN74LVT125QPWREP.pdf
- Description:
- IC BUF NON-INVERT 3.6V 14TSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:4,866
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Product details
Overview
SN74LVT125QPWREP from Texas Instruments is a 3.3-V ABT quadruple bus buffer with 3-state outputs in a 14-pin TSSOP package, supporting mixed-mode 5-V input tolerance, -40°C to 125°C operation, and Ioff-enabled partial-power-down mode. It serves as a level-translating bidirectional bus interface in industrial control backplanes and high-reliability data acquisition systems.
For engineers reviewing the SN74LVT125QPWREP datasheet, SN74LVT125QPWREP pinout, SN74LVT125QPWREP application, or SN74LVT125QPWREP equivalent, key selection criteria include its 32-mA output drive strength, bus-hold inputs eliminating external resistors, controlled ground bounce (<0.8 V), and extended temperature qualification for aerospace and defense subsystems.
Technical Context
This device implements four independent noninverting buffers, each with dedicated 3-state output-enable (OE) control and active bus-hold circuitry on all data inputs. Each channel operates with TTL-compatible thresholds (VIL = 0.8 V, VVIH = 2.0 V) while powered from 2.7–3.6 V.
The architecture supports unregulated battery operation down to 2.7 V and prevents backflow current during power sequencing via Ioff protection. Output enable timing is characterized with tPZH/tPZL ≤ 6.7 ns and propagation delay tPLH/tPHL ≤ 5.1 ns at 3.3 V with 50-pF load.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCC Range | 2.7 V to 3.6 V - enables direct connection to Li-ion battery rails without regulation |
| IOL / IOH | 32 mA / –32 mA - drives standard TTL loads and interfaces with legacy 5-V logic |
| tPLH / tPHL | ≤5.1 ns at 3.3 V - supports >100-MHz bus toggle rates in synchronous systems |
| Bus-Hold Current | ±75 µA at 3 V - maintains valid logic state on floating inputs without external pullups |
| Ioff | ±450 µA at VCC = 0 - blocks damaging current flow during hot-insertion or partial power-down |
| VOL / VOH | 0.5 V / 2.0 V at IOL = 32 mA / IOH = –32 mA - ensures noise margin >0.4 V in 3.3-V systems |
| Operating Temp | –40°C to +125°C - qualified per JEDEC HAST, temperature cycle, and bond intermetallic life tests |
Pinout & Package
TSSOP-14 (PW) package, 5.0 mm × 4.4 mm footprint, 1.2 mm max height, lead-free NIPDAU finish, MSL Level-1 (260°C reflow unlimited).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 4, 10, 13 | Output Enable (1OE, 2OE, 3OE, 4OE) | Active-low control: high = high-Z output; tie to VCC via pullup for power-up safety |
| 2, 5, 11, 14 | Data Input (1A, 2A, 3A, 4A) | Bus-hold enabled; accepts 0–5.5 V inputs regardless of VCC |
| 3, 6, 12, 9 | 3-State Output (1Y, 2Y, 3Y, 4Y) | Noninverting buffered output; high-Z when OE = high |
| 7 | GND | Ground reference for all logic and output stages |
| 8 | VCC | 3.3-V supply input; decoupling capacitor required within 10 mm |
Key Features
| Feature | Design Value |
|---|---|
| Mixed-mode voltage tolerance | 5-V-tolerant inputs with 3.3-V VCC - eliminates level shifters in 3.3/5-V hybrid buses |
| Bus-hold circuitry | Self-biasing on all A inputs - removes need for 10-kΩ pullup/pulldown resistors and saves PCB area |
| Ioff partial-power-down | Sub-µA leakage when VCC = 0 - enables safe insertion into live backplanes without system reset |
| Low ground bounce | VOLP < 0.8 V at VCC = 3.3 V - reduces simultaneous switching noise in dense memory/data bus layouts |
| Extended temperature qualification | JEDEC-qualified for –40°C to 125°C - meets MIL-STD-883 HAST and autoclave requirements for space-grade use |
Applications
| Industrial Backplane Interface | Aerospace Data Acquisition |
|---|---|
Use Scenario: Interfacing FPGA I/O banks to legacy 5-V sensor modules across a 12-slot Eurocard backplane. IC Role / Device Role / Timing Role: Voltage-level translating bus buffer isolating 3.3-V logic domains while maintaining signal integrity over 15-cm traces. Use Value: Eliminates discrete level shifters and reduces BOM count by 4 parts per slot; bus-hold prevents metastability during hot-swap events. | Use Scenario: Signal conditioning in radiation-hardened satellite telemetry units requiring uninterrupted operation at 125°C ambient. IC Role / Device Role / Timing Role: 3-state bus driver enabling time-division multiplexing of ADC outputs onto shared command/data bus. Use Value: Ioff protection prevents latch-up during solar flare-induced power droops; extended temp rating avoids derating penalties. |
| Ruggedized Test Equipment | Military Communication Subsystem |
Use Scenario: Embedded controller in portable field-test gear interfacing with both modern 3.3-V DUTs and legacy 5-V instrumentation. IC Role / Device Role / Timing Role: Bidirectional buffer managing direction control and voltage translation on shared JTAG/SPI debug bus. Use Value: Single-supply operation simplifies power design; 2.7-V minimum VCC supports brownout resilience during battery discharge. | Use Scenario: Secure radio front-end module where bus isolation prevents fault propagation between encryption processor and RF transceiver. IC Role / Device Role / Timing Role: Isolated 3-state gate controlling access to shared memory-mapped configuration registers. Use Value: Controlled VOLP ensures <100-ps jitter accumulation across 8-stage cascaded buffers in timing-critical crypto pipelines. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar bus buffer applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SN74LVC125APWRE4 | Lower drive (24 mA), no bus-hold, 1.65–3.6 V VCC range | Lacks 5-V input tolerance and extended temp support | Select when cost sensitivity outweighs mixed-voltage robustness and industrial temp range |
| SN74LVTH125PWRE4 | Higher drive (64 mA), no Ioff, 2.7–3.6 V VCC, same pinout | Unqualified for >85°C; lacks partial-power-down capability | Choose only for commercial-temp consumer designs needing higher fanout |
Compared with SN74LVT125QPWREP, the LVC125 variant trades off 5-V tolerance and bus-hold for lower static current, while the LVTH125 offers greater drive but forfeits military-grade thermal reliability and Ioff protection-making SN74LVT125QPWREP uniquely suited for harsh-environment 3.3-V/5-V coexistence.
Availability
SN74LVT125QPWREP is available at Aetrix Electronics and suitable for industrial backplanes, aerospace data acquisition systems, ruggedized test equipment, and military communication subsystems requiring stable component supply across extended temperature and mixed-voltage conditions.
Supply support for SN74LVT125QPWREP 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 delivering analog, embedded processing, and connectivity solutions for industrial, automotive, and communications markets.
The SN74LVT125-EP product line delivers enhanced plastic packaged, extended-temperature bus interface ICs designed specifically for high-reliability applications in aerospace, defense, and critical infrastructure where long-term supply stability and JEDEC-qualified stress testing are mandatory.
FAQ
What is the maximum input voltage tolerance for SN74LVT125QPWREP?
The SN74LVT125QPWREP supports input voltages up to 5.5 V regardless of VCC level, enabling direct interfacing with 5-V logic families while operating from a 3.3-V supply. This mixed-mode capability is explicitly specified in the Absolute Maximum Ratings table and confirmed in the Functional Description section of the TI datasheet SCBS796A.
Does SN74LVT125QPWREP require external pullup resistors on its inputs?
No, SN74LVT125QPWREP does not require external pullup resistors because it integrates active bus-hold circuitry on all data inputs (1A–4A). This feature maintains a valid logic state on undriven or floating inputs, and TI explicitly warns against using external resistors with this function enabled.
How is SN74LVT125QPWREP protected during partial power-down sequences?
SN74LVT125QPWREP incorporates Ioff circuitry that limits current to ±450 µA when VCC = 0 V and any input or output is biased between 0–4.5 V. This prevents damaging backflow current during hot-swap or staggered power sequencing, a requirement verified under JEDEC JESD78 latch-up testing.
What is the guaranteed propagation delay for SN74LVT125QPWREP at 3.3 V?
At VCC = 3.3 V and CL = 50 pF, SN74LVT125QPWREP guarantees tPLH and tPHL ≤ 5.1 ns across the full –40°C to 125°C operating range. Typical values are 2.7–4.2 ns, and these delays are measured under standardized load conditions defined in Figure 1 of the datasheet.
Is SN74LVT125QPWREP pin-compatible with other members of the LVT125 family?
Yes, SN74LVT125QPWREP shares identical pinout and functionality with SN74LVT125QDREP (SOIC-14) and the catalog SN74LVT125, as confirmed by TI's Package Option Addendum and consistent logic diagrams across all variants. All use the same 14-pin assignment for OE/A/Y/GND/VCC terminals.
SN74LVT125QPWREP 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, 32mA
- Voltage - Supply:
- 2.7V ~ 3.6V
- Operating Temperature:
- -40°C ~ 125°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 14-TSSOP
SN74LVT125QPWREP FAQ
1.How can I place an order for SN74LVT125QPWREP through Aetrix?
Please submit a Request for Quotation (RFQ) for SN74LVT125QPWREP 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 SN74LVT125QPWREP reliable?
The price and inventory of SN74LVT125QPWREP are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SN74LVT125QPWREP is usually 5 days.
3.What payment methods are accepted for SN74LVT125QPWREP?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SN74LVT125QPWREP transactions.
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4.How is shipping managed for SN74LVT125QPWREP?
SN74LVT125QPWREP orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SN74LVT125QPWREP 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 SN74LVT125QPWREP?
For technical support, including SN74LVT125QPWREP datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SN74LVT125QPWREP requirements.
6.How does Aetrix verify that SN74LVT125QPWREP is sourced from the original manufacturer or authorized distributors?
All SN74LVT125QPWREP 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 SN74LVT125QPWREP meets industry standards.
7.What is the process for return or replacement of SN74LVT125QPWREP?
All SN74LVT125QPWREP units undergo pre-shipment inspection (PSI). If there is an issue with SN74LVT125QPWREP, 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 SN74LVT125QPWREP part is unused and in its original packaging.
Return procedure for SN74LVT125QPWREP:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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