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Texas Instruments SN74AHC125QPWRG4Q1
- Part No.:
- SN74AHC125QPWRG4Q1
- Manufacturer:
- Texas Instruments
- Package:
- 14-TSSOP (0.173", 4.40mm Width)
- Datasheet:
-
SN74AHC125QPWRG4Q1.pdf
- Description:
- IC BUF NON-INVERT 5.5V 14TSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:4,200
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Product details
Overview
SN74AHC125QPWRG4Q1 from Texas Instruments is an automotive-qualified quadruple bus buffer gate with independent 3-state outputs, operating from 2 V to 5.5 V, delivering ±8 mA output drive at 5 V, 5.5 ns typical propagation delay (VCC = 5 V, CL = 15 pF), and rated for −40°C to +125°C ambient operation - used in motor control signal routing and industrial PLC I/O expansion.
For engineers reviewing the SN74AHC125QPWRG4Q1 datasheet, SN74AHC125QPWRG4Q1 pinout, SN74AHC125QPWRG4Q1 application, or SN74AHC125QPWRG4Q1 equivalent, key selection criteria include automotive AEC-Q100 Grade 1 qualification, TSSOP-14 package thermal performance (RθJA = 147.7°C/W), 3-state enable timing (tPZH/tPLZ ≤ 8 ns), and logic-level compatibility across 2–5.5 V supply rails.
Technical Context
The SN74AHC125QPWRG4Q1 implements four independent non-inverting buffers, each with active-low 3-state output control (OE). Each channel operates as a voltage-level-transparent path when OE is low, and presents high-impedance output when OE is high - enabling bidirectional bus isolation without direction control logic.
Its EPIC™ CMOS process ensures latch-up immunity (>250 mA per JESD 17), robust ESD protection (±2000 V HBM, ±1000 V CDM), and stable operation across full automotive temperature range with guaranteed switching performance at both 3.3 V and 5 V supplies.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCC Range | 2 V to 5.5 V - supports mixed-voltage system interfacing (e.g., 3.3 V MCU to 5 V peripheral) |
| IOH/IOL | −8 mA / +8 mA at 5 V - sufficient to drive standard TTL loads or multiple CMOS inputs |
| tPLH/tPHL | 3.8 ns min / 6.5 ns max (5 V, CL = 15 pF) - enables high-speed data gating in real-time control loops |
| tPZH/tPLZ | 3.6 ns min / 6 ns max (5 V, CL = 15 pF) - fast output enable/disable critical for dynamic bus arbitration |
| Operating Temp | −40°C to +125°C - qualified for under-hood and powertrain electronics per AEC-Q100 Grade 1 |
| ESD Rating | ±2000 V HBM - meets automotive assembly and handling requirements without additional protection |
| ICC (Quiescent) | 4 μA typical at 5.5 V - negligible standby current for always-on vehicle subsystems |
Pinout & Package
TSSOP-14 (PW) package: 5 mm × 6.4 mm body, 1.2 mm max height, 0.65 mm lead pitch, gull-wing leads, no exposed thermal pad.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 OE, 4 OE, 8 OE, 13 OE | Active-low output enable | Assert low to enable respective buffer; tie high via pullup for power-up high-Z safety |
| 2 A1, 5 A2, 9 A3, 12 A4 | Buffer input | Non-inverting data input per channel; must be driven to VCC or GND to prevent floating CMOS inputs |
| 3 Y1, 6 Y2, 10 Y3, 11 Y4 | Buffer output | 3-state output - high-Z when OE high, passes A input when OE low |
| 7 GND | Ground reference | Primary return path for all I/O and supply currents; requires low-impedance PCB connection |
| 14 VCC | Supply voltage | Power rail for logic core and output drivers; decoupling capacitor required within 1 cm of pin |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q100 Grade 1 qualification | Validated for automotive use from −40°C to +125°C ambient, including temperature cycling and HTOL stress |
| Independent 3-state control per channel | Enables selective bus segment isolation without shared enable logic or external gating |
| EPIC™ CMOS process | Delivers low power consumption, high noise immunity, and latch-up resistance exceeding 250 mA |
| Wide VCC tolerance (2–5.5 V) | Allows direct interface between 2.5 V, 3.3 V, and 5 V domains without level shifters |
| Guaranteed AC timing at 3.3 V and 5 V | Ensures predictable setup/hold and propagation delays across dual-supply industrial systems |
Applications
| Motor Drives and Controls | Programmable Logic Controllers |
|---|---|
Use Scenario: Isolating encoder feedback signals and PWM command lines between MCU and gate driver ICs in BLDC motor inverters. IC Role / Device Role / Timing Role: Signal buffer with 3-state control to prevent contention during fault shutdown or reset sequences. Use Value: Enables safe, glitch-free bus release during power transitions - critical for functional safety compliance (ISO 26262 ASIL-B). | Use Scenario: Routing digital I/O signals between fieldbus interface ASICs and local sensor/actuator modules in modular PLC backplanes. IC Role / Device Role / Timing Role: Bidirectional bus buffer allowing time-multiplexed data exchange on shared parallel control buses. Use Value: Reduces component count by eliminating discrete enable logic while maintaining deterministic timing (tPZH ≤ 6 ns @ 5 V). |
| Flow Meters | Power over Ethernet (PoE) |
Use Scenario: Conditioning pulse outputs from turbine or ultrasonic flow sensors before transmission to microcontroller ADC or timer capture inputs. IC Role / Device Role / Timing Role: Level-shifting and noise-filtering buffer with Schmitt-trigger–like input hysteresis inherent in AHC logic. Use Value: Improves signal integrity in electrically noisy fluid-handling environments without external RC filtering. | Use Scenario: Managing data and control lines between PoE PD controller and isolated DC-DC converter monitoring circuitry in powered devices. IC Role / Device Role / Timing Role: Voltage-level translation and bus isolation between 3.3 V management MCU and 5 V auxiliary power monitoring circuits. Use Value: Eliminates need for dedicated level translators while supporting hot-swap sequencing via controlled 3-state enable timing. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar bus buffer applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SN74LVC125AQDRQ1 | Lower VCC range (1.65–5.5 V); higher speed (tPD = 3.2 ns @ 3.3 V); lower drive (±24 mA) | Better suited for 1.8 V/3.3 V-only systems; less margin for 5 V legacy interfaces | Select when optimizing for lowest power and 3.3 V-centric designs; verify 5 V tolerance not required |
| SN74AHC244QPWRQ1 | Octal configuration (2×4), identical VCC range and timing; larger TSSOP-20 package | Used where higher channel density reduces board space vs. two SN74AHC125QPWRG4Q1 units | Choose for compact 8-signal buffering; avoid if only four channels needed due to pin count overhead |
Compared with SN74LVC125AQDRQ1 and SN74AHC244QPWRQ1, the SN74AHC125QPWRG4Q1 offers optimal balance of 2–5.5 V interoperability, proven automotive reliability, and minimal footprint for quad-channel isolation - making it preferred for mixed-voltage automotive subsystems requiring precise enable timing and wide supply flexibility.
Availability
SN74AHC125QPWRG4Q1 is available at Aetrix Electronics and suitable for motor drives and controls, programmable logic controllers, and flow meter electronics requiring stable component supply across extended temperature ranges and automotive-grade traceability.
Supply support for SN74AHC125QPWRG4Q1 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 automotive ICs, with decades of automotive qualification expertise and broad manufacturing scale.
The SN74AHC125QPWRG4Q1 belongs to TI's AHC logic family designed specifically for high-reliability automotive signal routing - emphasizing wide voltage operation, AEC-Q100 compliance, and robust noise immunity in electrically harsh environments.
FAQ
What is the maximum operating temperature for the SN74AHC125QPWRG4Q1?
The SN74AHC125QPWRG4Q1 is rated for continuous operation from −40°C to +125°C ambient temperature, meeting AEC-Q100 Grade 1 requirements for automotive under-hood and powertrain applications. This rating is validated across all electrical parameters in the datasheet, including propagation delay, output drive, and quiescent current, with no derating required within this range.
Does the SN74AHC125QPWRG4Q1 support 2.5 V logic levels?
Yes, the SN74AHC125QPWRG4Q1 supports 2.5 V logic levels. Its VCC range spans 2 V to 5.5 V, and its input thresholds scale with VCC - for example, VIH is 1.5 V minimum at VCC = 2 V, ensuring reliable recognition of 2.5 V signals when powered at 2.5 V or higher. Output VOH/VOL also meet 2.5 V interface requirements per AHC specifications.
How should unused inputs be handled on the SN74AHC125QPWRG4Q1?
All unused inputs on the SN74AHC125QPWRG4Q1 - including A and OE pins - must be tied to either VCC or GND. Floating CMOS inputs can cause increased ICC, erratic output behavior, or localized heating. TI recommends using pullup or pulldown resistors (typically 10 kΩ) to ensure defined logic states and maintain device reliability per application report SCBA004.
Is the SN74AHC125QPWRG4Q1 pin-compatible with the commercial-grade SN74AHC125?
Yes, the SN74AHC125QPWRG4Q1 is pin-compatible with the commercial SN74AHC125 in the same TSSOP-14 (PW) package. Both share identical pinout, electrical characteristics, and functional behavior. The Q1 suffix denotes automotive qualification (AEC-Q100 Grade 1), enhanced test coverage, and extended temperature support - with no physical or logical differences in pin assignment or operation.
What is the thermal resistance (RθJA) of the SN74AHC125QPWRG4Q1 in its TSSOP package?
For the SN74AHC125QPWRG4Q1 in the TSSOP-14 (PW) package, the junction-to-ambient thermal resistance RθJA is 147.7°C/W under standard JEDEC test conditions (1-layer board, 1 in² copper). This value assumes no internal thermal pad - unlike WQFN variants - and informs thermal design margins for continuous operation at maximum load and temperature.
SN74AHC125QPWRG4Q1 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- 74AHC
- 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:
- 8mA, 8mA
- Voltage - Supply:
- 2V ~ 5.5V
- Operating Temperature:
- -40°C ~ 125°C (TA)
- Grade:
- Automotive
- Qualification:
- AEC-Q100
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 14-TSSOP
SN74AHC125QPWRG4Q1 FAQ
1.How can I place an order for SN74AHC125QPWRG4Q1 through Aetrix?
Please submit a Request for Quotation (RFQ) for SN74AHC125QPWRG4Q1 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 SN74AHC125QPWRG4Q1 reliable?
The price and inventory of SN74AHC125QPWRG4Q1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SN74AHC125QPWRG4Q1 is usually 5 days.
3.What payment methods are accepted for SN74AHC125QPWRG4Q1?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SN74AHC125QPWRG4Q1 transactions.
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4.How is shipping managed for SN74AHC125QPWRG4Q1?
SN74AHC125QPWRG4Q1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SN74AHC125QPWRG4Q1 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 SN74AHC125QPWRG4Q1?
For technical support, including SN74AHC125QPWRG4Q1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SN74AHC125QPWRG4Q1 requirements.
6.How does Aetrix verify that SN74AHC125QPWRG4Q1 is sourced from the original manufacturer or authorized distributors?
All SN74AHC125QPWRG4Q1 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 SN74AHC125QPWRG4Q1 meets industry standards.
7.What is the process for return or replacement of SN74AHC125QPWRG4Q1?
All SN74AHC125QPWRG4Q1 units undergo pre-shipment inspection (PSI). If there is an issue with SN74AHC125QPWRG4Q1, 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 SN74AHC125QPWRG4Q1 part is unused and in its original packaging.
Return procedure for SN74AHC125QPWRG4Q1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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