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Texas Instruments SN74LVC125AQPWRQ1
- Part No.:
- SN74LVC125AQPWRQ1
- Manufacturer:
- Texas Instruments
- Package:
- 14-TSSOP (0.173", 4.40mm Width)
- Datasheet:
-
SN74LVC125AQPWRQ1.pdf
- Description:
- IC BUF NON-INVERT 3.6V 14TSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:7,312
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Product details
Overview
SN74LVC125AQPWRQ1 from Texas Instruments is an AEC-Q100 qualified automotive quadruple bus buffer gate with 3-state outputs, operating from 1.65V to 3.6V over –40°C to 125°C. It features 5.5V-tolerant inputs, 4.8ns max propagation delay at 3.3V, and independent OE control per channel-used in automotive infotainment data routing, ADAS sensor interface buffering, and ECU-level level translation.
For engineers reviewing the SN74LVC125AQPWRQ1 datasheet, SN74LVC125AQPWRQ1 pinout, SN74LVC125AQPWRQ1 application, or SN74LVC125AQPWRQ1 equivalent, key selection criteria include 3.3V/5V mixed-voltage compatibility, automotive-grade thermal robustness (–40°C to 125°C), 3-state output timing (ten/tdis ≤ 7ns), and WQFN/TSSOP package options for space-constrained PCB layouts.
Technical Context
This device implements four independent noninverting buffers, each with dedicated active-low output-enable (OE) control enabling high-impedance state management per channel. Its CMOS LVC logic family ensures rail-to-rail output swing, low dynamic power consumption (Cpd = 15pF at 3.3V), and input thresholds compatible with both 3.3V and 5V logic sources.
Each buffer supports bidirectional voltage translation: inputs tolerate up to 5.5V regardless of VCC (1.65V–3.6V), while outputs swing between GND and VCC. The design incorporates latch-up immunity (>250mA per JESD17), ground-bounce (VOLP < 0.8V) and undershoot (VOHV > 2V) suppression, and robust ESD protection (±2000V HBM).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCC Range | 1.65V to 3.6V - Enables direct integration into 3.3V automotive domains without level shifters |
| Operating Temp | –40°C to 125°C - Qualified for engine bay, transmission control, and ADAS module placement |
| Input Voltage | Up to 5.5V - Allows interfacing with legacy 5V microcontrollers or sensors without external clamping |
| tpd Max | 4.8ns at 3.3V - Supports high-speed data bus isolation in CAN FD or Ethernet AVB auxiliary paths |
| IOL/IOH | ±24mA at 3V - Drives standard 50Ω transmission lines or multiple 74LVC inputs without fanout limitation |
| ESD Rating | ±2000V HBM - Meets AEC-Q100-002 for robustness in vehicle assembly and service environments |
| Power Dissipation | 500mW at TA ≤ 125°C - Sustains continuous operation in sealed enclosures with minimal heatsinking |
Pinout & Package
TSSOP-14 (PW) package: 5.00mm × 6.4mm body, 1.2mm max height, exposed pad optional; RoHS-compliant, NIPDAU lead finish, MSL Level-1.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1OE, 4OE, 3OE, 2OE | Active-low output enable | Independent per-channel disable control; tie high via pullup for power-up high-Z safety |
| 1A–4A | Buffer input | 5.5V-tolerant CMOS inputs accepting 3.3V or 5V logic levels |
| 1Y–4Y | Noninverting buffered output | 3-state outputs with rail-to-rail swing; VOL ≤ 0.45V @ 4mA, VOH ≥ VCC–0.2V |
| VCC | Positive supply | Single 1.65–3.6V rail powers all four buffers; requires local 0.1μF bypass |
| GND | Ground reference | Common return for logic and output current; connects to PCB ground plane |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q100 Grade 1 qualification | Validated for automotive use across –40°C to 125°C ambient, including HTOL and temperature cycling |
| 5.5V-tolerant inputs | Eliminates external voltage translators when connecting 5V sensors to 3.3V MCUs in body control modules |
| Low ground bounce (VOLP < 0.8V) | Reduces noise coupling into adjacent analog circuits like audio amplifiers or ADC references |
| Independent 3-state control | Enables dynamic bus arbitration in multi-master systems such as diagnostic communication gateways |
| High noise immunity | VIH/VIL thresholds scale with VCC (e.g., 0.65×VCC), maintaining margin across supply variation |
Applications
| Automotive Infotainment Data Routing | ADAS Sensor Interface Buffering |
|---|---|
Use Scenario: Isolating LVDS or parallel video data paths between head unit SoC and display module during sleep/wake transitions. IC Role / Device Role / Timing Role: Quad buffer provides per-lane 3-state control to prevent signal contention during power-state changes. Use Value: Enables clean hot-plug detection and display reinitialization without bus lockup or EMI spikes. | Use Scenario: Conditioning radar sensor SPI clock/data lines before routing to domain controller MCU. IC Role / Device Role / Timing Role: Buffers and isolates SPI signals while translating 5V sensor logic to 3.3V MCU I/O voltage domain. Use Value: Prevents voltage mismatch damage and ensures setup/hold timing compliance at 20MHz SPI rates. |
| ECU-Level Level Translation | Body Control Module Bus Isolation |
Use Scenario: Interfacing legacy 5V LIN transceivers with modern 3.3V microcontrollers in door module ECUs. IC Role / Device Role / Timing Role: Acts as unidirectional level shifter on TX/RX lines with independent OE for fault recovery. Use Value: Eliminates discrete resistor-divider networks, reducing BOM count and improving signal integrity at 20kbps. | Use Scenario: Segregating interior lighting PWM outputs from HVAC control logic to prevent cross-talk. IC Role / Device Role / Timing Role: Provides galvanic isolation between noisy PWM drivers and sensitive analog sensor inputs. Use Value: Reduces conducted emissions by >15dB in 150kHz–30MHz CISPR 25 Class 5 testing. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar bus buffer applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SN74LVC125AQDRQ1 | SOIC-14 package (8.65mm × 6mm); higher RθJA (127.8°C/W) than TSSOP | Better suited for manual assembly or legacy PCB footprints requiring wider pitch | Select when board rework accessibility or thermal mass tolerance outweighs size constraints |
| SN74LVC125AWBQARQ1 | WQFN-14 (3mm × 2.5mm); thermal pad required; lower RθJA (102.3°C/W) | Optimized for high-density ADAS camera modules needing superior thermal performance | Prefer for automated SMT lines with thermal pad soldering capability and <100°C junction temp targets |
Compared with SN74LVC125AQDRQ1 and SN74LVC125AWBQARQ1, the SN74LVC125AQPWRQ1 balances compact TSSOP footprint (5.00mm × 6.4mm), moderate thermal resistance (150.8°C/W), and ease of inspection-making it ideal for mid-volume instrument cluster PCBs where layout density and testability are both critical.
Availability
SN74LVC125AQPWRQ1 is available at Aetrix Electronics and suitable for automotive infotainment systems, ADAS sensor interfaces, and body control modules requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for SN74LVC125AQPWRQ1 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 automotive, industrial, and personal electronics markets.
The SN74LVC125A-Q1 belongs to TI's automotive-qualified LVC logic family, engineered specifically for robust signal integrity, mixed-voltage interoperability, and AEC-Q100 reliability in vehicle subsystems.
FAQ
What is the maximum operating voltage for SN74LVC125AQPWRQ1 inputs?
The SN74LVC125AQPWRQ1 inputs accept voltages up to 5.5V regardless of VCC level, enabling direct connection to 5V logic sources without external clamping diodes or level shifters. This specification is validated across the full –40°C to 125°C temperature range and is explicitly stated in Section 4.3 of the datasheet under "VI Input voltage".
Does SN74LVC125AQPWRQ1 support hot insertion in live backplanes?
Yes, SN74LVC125AQPWRQ1 supports hot insertion due to its 5.5V-tolerant inputs and high-impedance 3-state outputs. When OE is held high during insertion, all outputs remain in high-Z state, preventing bus contention. The device's ±2000V HBM ESD rating and latch-up immunity (>250mA) further ensure survivability during plug-in events in automotive gateway applications.
How does the SN74LVC125AQPWRQ1 handle power sequencing during system startup?
The SN74LVC125AQPWRQ1 requires OE pins to be tied to VCC through a pullup resistor to ensure outputs default to high-impedance during power-up. This prevents unintended signal assertion on shared buses. The minimum pullup value depends on the driver's sink capability-TI recommends ≥10kΩ for typical MCU GPIOs, as detailed in Section 6.1 "Overview" of the datasheet.
Can SN74LVC125AQPWRQ1 drive standard 50Ω transmission lines?
Yes, SN74LVC125AQPWRQ1 can directly drive 50Ω loads: at VCC = 3V, it delivers ±24mA output current (IOL/IOH), sufficient for 50Ω termination to VCC/ground. Measured VOL ≤ 0.55V and VOH ≥ 2.3V under these conditions ensure adequate noise margins for high-speed digital links in automotive domain controllers.
What is the thermal resistance (RθJA) of the SN74LVC125AQPWRQ1 in its TSSOP package?
The SN74LVC125AQPWRQ1 in the PW (TSSOP-14) package has a junction-to-ambient thermal resistance (RθJA) of 150.8°C/W, as specified in Section 4.4 "Thermal Information" of the datasheet. This value assumes standard JEDEC 2-layer board conditions and must be derated by 5.5mW/K above 60°C ambient for sustained operation.
SN74LVC125AQPWRQ1 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- 74LVC
- 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:
- 24mA, 24mA
- Voltage - Supply:
- 1.65V ~ 3.6V
- Operating Temperature:
- -40°C ~ 125°C (TA)
- Grade:
- Automotive
- Qualification:
- AEC-Q100
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 14-TSSOP
SN74LVC125AQPWRQ1 FAQ
1.How can I place an order for SN74LVC125AQPWRQ1 through Aetrix?
Please submit a Request for Quotation (RFQ) for SN74LVC125AQPWRQ1 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 SN74LVC125AQPWRQ1 reliable?
The price and inventory of SN74LVC125AQPWRQ1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SN74LVC125AQPWRQ1 is usually 5 days.
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SN74LVC125AQPWRQ1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SN74LVC125AQPWRQ1 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 SN74LVC125AQPWRQ1?
For technical support, including SN74LVC125AQPWRQ1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SN74LVC125AQPWRQ1 requirements.
6.How does Aetrix verify that SN74LVC125AQPWRQ1 is sourced from the original manufacturer or authorized distributors?
All SN74LVC125AQPWRQ1 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 SN74LVC125AQPWRQ1 meets industry standards.
7.What is the process for return or replacement of SN74LVC125AQPWRQ1?
All SN74LVC125AQPWRQ1 units undergo pre-shipment inspection (PSI). If there is an issue with SN74LVC125AQPWRQ1, 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 SN74LVC125AQPWRQ1 part is unused and in its original packaging.
Return procedure for SN74LVC125AQPWRQ1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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