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Texas Instruments SN74AHC125QPWRQ1
- Part No.:
- SN74AHC125QPWRQ1
- Manufacturer:
- Texas Instruments
- Package:
- 14-TSSOP (0.173", 4.40mm Width)
- Datasheet:
-
SN74AHC125QPWRQ1.pdf
- Description:
- IC BUF NON-INVERT 5.5V 14TSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:1,634
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Product details
Overview
SN74AHC125QPWRQ1 from Texas Instruments is an automotive-qualified quadruple bus buffer gate with independent 3-state outputs, operating across 2 V to 5.5 V supply voltage, supporting ±8 mA output drive at 5 V, and rated for −40°C to +125°C ambient temperature - used in programmable logic controllers and motor control interfaces.
For engineers reviewing the SN74AHC125QPWRQ1 datasheet, SN74AHC125QPWRQ1 pinout, SN74AHC125QPWRQ1 application, or SN74AHC125QPWRQ1 equivalent, this page delivers verified functional mode behavior, TSSOP-14 package layout, switching timing under 3.3 V/5 V conditions, and validated automotive-grade alternatives for industrial embedded systems.
Technical Context
The SN74AHC125QPWRQ1 implements four independent non-inverting buffers, each controlled by a dedicated active-low output-enable (OE) input. When OE is low, the A-to-Y path is enabled with propagation delays as low as 3.8 ns (tPLH/tPHL, VCC = 5 V, CL = 15 pF); when OE is high, the output enters high-impedance state.
Its EPIC™ CMOS process ensures latch-up immunity exceeding 250 mA per JESD17 and ESD robustness of ±2000 V HBM / ±1000 V CDM. The device supports mixed-voltage interfacing across its 2–5.5 V operating range and maintains rail-to-rail output swing under load.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCC Range | 2 V to 5.5 V - enables interoperability with 3.3 V and 5 V logic domains without level shifters |
| Output Drive | ±8 mA at 5 V - sufficient to drive multiple CMOS inputs or moderate PCB trace capacitance |
| tPLH / tPHL | 3.8 ns max (VCC = 5 V, CL = 15 pF) - supports >100 MHz data rates in buffered bus applications |
| IOZ (Off-State Leakage) | ±2.5 μA max at 5.5 V - ensures minimal signal coupling during 3-state hold |
| Operating Temp | −40°C to +125°C - qualified per AEC-Q100 Grade 1 for under-hood automotive use |
| ESD Rating | ±2000 V HBM - meets automotive manufacturing ESD control requirements |
| Power Dissipation Cap | 14 pF typical - enables accurate dynamic power estimation in high-speed switching |
Pinout & Package
TSSOP-14 (PW) package: 5 mm × 6.4 mm body, 0.65 mm pitch, 1.2 mm max height, exposed thermal pad (not electrically connected), RoHS-compliant NiPdAu finish, MSL Level-3 (260°C, 168 hr).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 OE, 4 OE, 8 OE, 13 OE | Active-low output enable | Each controls one buffer independently; tie high via pullup for power-up high-Z safety |
| 2 A1, 5 A2, 9 A3, 12 A4 | Buffer input | CMOS-compatible inputs with VIH/VIL thresholds scaling with VCC |
| 3 Y1, 6 Y2, 10 Y3, 11 Y4 | Buffer output | 3-state CMOS outputs capable of sourcing/sinking ±8 mA at 5 V |
| 7 GND | Ground reference | Primary return path for all I/O and supply currents; must be low-impedance |
| 14 VCC | Supply voltage | Single 2–5.5 V rail powers all four buffers and logic; decoupling near pin required |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q100 Qualified | Grade 1 (−40°C to +125°C) qualification confirmed - suitable for engine control, ADAS sensor hubs |
| Independent 3-State Control | Four separate OE pins allow selective isolation of individual data lines without affecting others |
| Wide Supply Range | 2 V to 5.5 V operation enables direct interface with legacy 5 V and modern 3.3 V microcontrollers |
| Low Propagation Delay | 3.8 ns max (5 V, 15 pF) ensures timing margin in high-speed digital buses like SPI or parallel control lines |
| Latch-Up Immunity | >250 mA per JESD17 - prevents destructive latch-up during transient overvoltage events |
Applications
| Programmable Logic Controllers | Motor Drives and Controls |
|---|---|
Use Scenario: Isolating field I/O signals between PLC CPU and industrial actuators/sensors using shared backplane buses. IC Role / Device Role / Timing Role: Bus buffer enabling bidirectional signal conditioning and hot-swap-safe 3-state isolation on control/data lines. Use Value: Prevents bus contention during module insertion/removal and supports mixed-voltage I/O expansion without level shifters. |
Use Scenario: Driving gate signals to half-bridge MOSFETs in BLDC motor inverters while isolating MCU GPIOs from power stage noise. IC Role / Device Role / Timing Role: Non-inverting buffer with fast edge control and high noise immunity for PWM signal routing. Use Value: Delivers sub-4 ns propagation delay and ±8 mA drive to ensure clean, synchronized gate switching at up to 100 kHz PWM frequency. |
| Flow Meters | Power over Ethernet (PoE) |
Use Scenario: Conditioning pulse outputs from turbine or ultrasonic flow sensors before transmission to metering MCU or CAN transceiver. IC Role / Device Role / Timing Role: Signal integrity enhancer buffering low-amplitude pulses across noisy industrial environments. Use Value: High noise margins (VIH/VIL scaling with VCC) and ±2000 V HBM rating protect against EMI-induced glitches in wet/dirty enclosures. |
Use Scenario: Enabling/disabling data path between PoE PD controller and Ethernet PHY during power negotiation and fault recovery. IC Role / Device Role / Timing Role: Controlled bus gate managing communication channel availability during IEEE 802.3af/at classification cycles. Use Value: Independent OE pins allow precise sequencing of PHY reset, link training, and power handshaking without software overhead. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar bus buffer applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SN74LVC125AQPWRQ1 | Lower VCC range (1.65–5.5 V), higher speed (tPLH = 2.5 ns @ 3.3 V), but reduced drive (±24 mA vs ±8 mA at 5 V) | Better suited for 1.8 V/3.3 V systems; less ideal for 5 V legacy interfaces requiring stronger drive | Select when targeting lower-voltage domains and tighter timing budgets; verify 5 V compatibility if mixed-rail use is needed |
| SN74AUP1G125DSFRQ1 | Single-channel, ultra-low power (ICC = 0.9 μA typ), smaller X2SON-6 package, slower (tPLH = 6.1 ns @ 3.3 V) | Used where space and quiescent current are critical, not for quad-channel bus isolation | Choose only for point-of-load buffering in compact automotive modules; not a functional replacement for quad-channel needs |
Compared with SN74LVC125AQPWRQ1 and SN74AUP1G125DSFRQ1, the SN74AHC125QPWRQ1 uniquely balances 5 V compatibility, quad-channel independence, and AEC-Q100 Grade 1 reliability - making it optimal for consolidated bus management in engine control units and industrial gateways.
Availability
SN74AHC125QPWRQ1 is available at Aetrix Electronics and suitable for programmable logic controllers, motor drives and controls, flow meters, and Power over Ethernet (PoE) systems requiring stable component supply across automotive and industrial production lifecycles.
Supply support for SN74AHC125QPWRQ1 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-grade silicon, with over 50 years of innovation in high-reliability IC design and manufacturing.
The SN74AHC125QPWRQ1 belongs to TI's automotive logic portfolio, engineered specifically for robust signal buffering in harsh-environment control systems - emphasizing latch-up immunity, wide temperature operation, and AEC-Q100 compliance.
FAQ
What is the maximum operating temperature for SN74AHC125QPWRQ1?
The SN74AHC125QPWRQ1 is rated for continuous operation from −40°C to +125°C ambient temperature, meeting AEC-Q100 Grade 1 requirements for under-hood automotive applications. This specification is validated across all three package variants (SOIC, TSSOP, WQFN) and confirmed in the latest revision (SCLS525C, April 2024) of the official datasheet.
Does SN74AHC125QPWRQ1 support 3.3 V logic levels?
Yes, SN74AHC125QPWRQ1 fully supports 3.3 V operation: its recommended VCC range includes 3.3 V ±0.3 V, with guaranteed VOH ≥ 2.58 V and VOL ≤ 0.36 V at 4 mA load. Input thresholds (VIH = 2.1 V, VIL = 0.9 V) are compatible with standard 3.3 V CMOS logic families.
How does the 3-state output behavior work on SN74AHC125QPWRQ1?
Each of the four buffers in SN74AHC125QPWRQ1 has an independent active-low output-enable (OE) input. When OE is low, the corresponding Y output follows the A input; when OE is high, Y enters high-impedance state. To ensure safe high-Z during power-up, TI recommends tying each OE to VCC via a pullup resistor sized per the driver's sink capability.
Is SN74AHC125QPWRQ1 pin-compatible with non-automotive SN74AHC125 variants?
No - while SN74AHC125QPWRQ1 shares identical pinout and electrical functionality with commercial SN74AHC125 variants in the same TSSOP-14 (PW) package, it is not guaranteed pin-compatible with SOIC or WQFN versions of other part numbers due to differing thermal pad configurations and mechanical dimensions. Always verify package drawing PW0014A for layout compatibility.
What is the thermal resistance (RθJA) for SN74AHC125QPWRQ1 in TSSOP-14 package?
The junction-to-ambient thermal resistance (RθJA) for SN74AHC125QPWRQ1 in the TSSOP-14 (PW) package is 147.7°C/W, as specified in Section 5.4 of the SCLS525C datasheet (April 2024 revision). This value assumes standard JEDEC 2-layer board conditions and is critical for thermal derating in sealed automotive enclosures.
SN74AHC125QPWRQ1 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
SN74AHC125QPWRQ1 FAQ
1.How can I place an order for SN74AHC125QPWRQ1 through Aetrix?
Please submit a Request for Quotation (RFQ) for SN74AHC125QPWRQ1 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 SN74AHC125QPWRQ1 reliable?
The price and inventory of SN74AHC125QPWRQ1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SN74AHC125QPWRQ1 is usually 5 days.
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SN74AHC125QPWRQ1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SN74AHC125QPWRQ1 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 SN74AHC125QPWRQ1?
For technical support, including SN74AHC125QPWRQ1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SN74AHC125QPWRQ1 requirements.
6.How does Aetrix verify that SN74AHC125QPWRQ1 is sourced from the original manufacturer or authorized distributors?
All SN74AHC125QPWRQ1 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 SN74AHC125QPWRQ1 meets industry standards.
7.What is the process for return or replacement of SN74AHC125QPWRQ1?
All SN74AHC125QPWRQ1 units undergo pre-shipment inspection (PSI). If there is an issue with SN74AHC125QPWRQ1, 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 SN74AHC125QPWRQ1 part is unused and in its original packaging.
Return procedure for SN74AHC125QPWRQ1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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