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Texas Instruments SN74AHC125QPWRG4
- Part No.:
- SN74AHC125QPWRG4
- Manufacturer:
- Texas Instruments
- Package:
- 14-TSSOP (0.173", 4.40mm Width)
- Datasheet:
-
SN74AHC125QPWRG4.pdf
- Description:
- IC BUF NON-INVERT 5.5V 14TSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:1,505
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Product details
Overview
SN74AHC125QPWRG4 from Texas Instruments is an automotive-grade quadruple bus buffer gate with independent 3-state outputs, operating from 2 V to 5.5 V supply, delivering <5.5 ns propagation delay at 5 V, ±8 mA output drive, and latch-up immunity >250 mA per JESD17 - used for bidirectional data isolation and bus contention control in vehicle infotainment and body control modules.
For engineers reviewing the SN74AHC125QPWRG4 datasheet, SN74AHC125QPWRG4 pinout, SN74AHC125QPWRG4 application, or SN74AHC125QPWRG4 equivalent, key selection criteria include its AEC-Q100 qualification, TSSOP-14 package footprint, 3-state enable timing (tPZH/tPLZ), input voltage thresholds across VCC range, and compatibility with 3.3 V/5 V mixed-signal buses.
Technical Context
The SN74AHC125QPWRG4 implements four independent non-inverting buffers, each with dedicated active-low output-enable (OE) control. Each channel operates as a digital switch: when OE is low, A→Y passes with logic-level translation; when OE is high, Y enters high-impedance state - enabling shared-bus arbitration without external pull-ups.
It uses TI's EPIC™ (Enhanced-Performance Implanted CMOS) process for robust noise immunity and rail-to-rail switching. Input thresholds scale with VCC (VIH = 0.7×VCC min, VIL = 0.3×VCC max), and output drive strength is specified at both 3.3 V and 5 V, supporting legacy and modern automotive voltage domains.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCC Range | 2 V to 5.5 V - supports dual-rail systems and brown-out tolerant operation in automotive power domains. |
| Propagation Delay (tPLH/tPHL) | 3.8 ns min / 6.5 ns max at 5 V, CL = 15 pF - enables sub-100 MHz bus clocking with timing margin. |
| Output Drive (IOL/IOH) | ±8 mA at 5 V - sufficient to drive 50 Ω transmission lines or fan-out to ≥10 LVTTL loads. |
| Input Thresholds | VIH = 3.5 V, VIL = 1.5 V at 5 V - ensures noise margins >1.5 V under worst-case VCC and temperature. |
| Latch-up Immunity | >250 mA per JESD17 - meets automotive transient robustness requirements for under-hood ECU environments. |
| Operating Temperature | −40 °C to +125 °C - qualified for engine bay, ADAS sensor hubs, and powertrain control units. |
| Power Dissipation Cap. | 14 pF - predicts dynamic power consumption for thermal modeling at 1 MHz toggle rate. |
Pinout & Package
TSSOP-14 (PW) package: 5 mm × 6.4 mm body, 1.2 mm max height, 0.65 mm lead pitch, RoHS-compliant NiPdAu finish, MSL Level-1.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 4, 8, 13 | OE (active-low) | Independent 3-state control per buffer - tie high to disable channel; low to enable A→Y pass-through. |
| 2, 5, 9, 12 | A (input) | Buffer input - accepts 2 V–5.5 V logic; no internal pull-up/down; must be driven or tied. |
| 3, 6, 10, 11 | Y (output) | Non-inverting buffered output - high-Z when corresponding OE = high; drives bus or downstream logic. |
| 7 | GND | Ground reference - requires low-inductance connection to minimize ground bounce during switching. |
| 14 | VCC | Supply rail - bypass with 0.1 μF ceramic capacitor placed within 3 mm of pin for stable operation. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q100 Qualified | Meets Grade 1 automotive reliability standards - validated for 1000+ temperature cycles and 1000+ hours HTOL. |
| EPIC™ CMOS Process | Delivers lower dynamic power and higher noise immunity vs. standard CMOS - critical for noisy vehicle electrical systems. |
| Scalable Input Thresholds | VIH/VIL track VCC - eliminates level-shifter need when interfacing 3.3 V controllers to 5 V peripherals. |
| High-Drive 3-State Outputs | ±8 mA at 5 V - supports direct connection to unterminated stubs or multiple loads without external buffers. |
| Low Power Consumption | ICC = 40 μA max at 5.5 V - reduces quiescent current in always-on vehicle modules like gateway ECUs. |
Applications
| Infotainment Head Unit Bus Isolation | ADAS Camera Interface Multiplexing |
|---|---|
Use Scenario: Isolating MCU GPIOs from shared I²C/SPI debug bus while enabling firmware updates via external programmer without disrupting running subsystems. IC Role / Device Role / Timing Role: Quad 3-state buffer acts as directional bus switch - OE pins controlled by MCU to selectively route signals between processor and peripheral ICs. Use Value: Prevents bus contention during hot-plug programming; eliminates need for discrete MOSFET switches or complex CPLD logic. | Use Scenario: Sharing a single MIPI CSI-2 host interface among multiple camera sensors in rear-view, surround-view, and driver-monitoring systems. IC Role / Device Role / Timing Role: SN74AHC125QPWRG4 buffers and gates parallel clock/data lanes - OE synchronized to sensor frame sync to avoid signal overlap. Use Value: Enables time-multiplexed sensor access using standard logic instead of costly serializer/deserializer ICs. |
| Body Control Module Signal Conditioning | Electric Power Steering (EPS) Diagnostic Port |
Use Scenario: Driving multiple LIN transceiver enable lines from a single microcontroller port while maintaining electrical isolation between subsystems. IC Role / Device Role / Timing Role: Acts as level-translating driver - accepts 3.3 V MCU outputs and delivers 5 V-compatible drive to LIN PHYs with precise enable timing. Use Value: Reduces BOM count by replacing four discrete level shifters; supports simultaneous or staggered activation per LIN node requirements. | Use Scenario: Providing isolated, glitch-free access to EPS motor controller debug UART signals for service tools without affecting real-time torque control loop. IC Role / Device Role / Timing Role: 3-state buffer isolates diagnostic TX line - OE asserted only during technician-initiated session, preventing backdrive into safety-critical UART. Use Value: Meets ISO 26262 ASIL-B functional safety requirement for diagnostic port independence from control path. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar bus buffer applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SN74LV125AQPWR | Lower VCC range (1.65–5.5 V); 12 ns max tPD at 3.3 V; ±6 mA drive; LV logic family. | Better suited for ultra-low-voltage domains (e.g., 1.8 V I/O), but slower and less drive-capable than SN74AHC125QPWRG4. | Select when system operates below 2 V or requires lower static power; not drop-in for 2–5.5 V AHC timing-critical paths. |
| MC74VHC125DT | Pin-compatible; identical function; −40 °C to +105 °C rating (not AEC-Q100); different thermal resistance (RθJA = 120 °C/W). | Valid for industrial/commercial use only - lacks automotive qualification, traceability, and extended temp validation. | Acceptable for non-automotive prototypes or cost-sensitive non-safety designs; not approved for production vehicle ECUs. |
Compared with SN74LV125AQPWR and MC74VHC125DT, the SN74AHC125QPWRG4 uniquely combines AEC-Q100 Grade 1 qualification, 5.5 ns speed at 5 V, and ±8 mA drive in a TSSOP-14 package - making it the only option qualified for timing-critical, safety-relevant automotive bus isolation.
Availability
SN74AHC125QPWRG4 is available at Aetrix Electronics and suitable for automotive infotainment, ADAS sensor interfaces, and body control module designs requiring stable component supply, long-term lifecycle support, and AEC-Q100-compliant logistics traceability.
Supply support for SN74AHC125QPWRG4 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 over 50 years of innovation in high-reliability silicon design.
The SN74AHC125QPWRG4 belongs to TI's automotive logic portfolio, engineered specifically for robust signal routing in harsh-temperature, high-noise vehicle environments - targeting ECU, gateway, and domain controller applications.
FAQ
What is the maximum operating frequency supported by the SN74AHC125QPWRG4?
The SN74AHC125QPWRG4 does not specify a maximum clock frequency directly, but its typical propagation delay of 3.8–6.5 ns at 5 V and 15 pF load implies reliable operation up to ~100 MHz for single-edge-triggered bus gating. System-level frequency limits depend on board layout, load capacitance, and setup/hold margins - verified via timing analysis using TI's published switching characteristics tables for VCC = 3.3 V and 5 V.
Does the SN74AHC125QPWRG4 require external pull-up resistors on its OE pins?
Yes - to ensure defined high-impedance state during power-up/power-down, each OE pin of the SN74AHC125QPWRG4 should be tied to VCC through a pull-up resistor. TI recommends minimum resistance based on driver sink capability; a 10 kΩ resistor is commonly used. Leaving OE floating risks undefined output states and potential bus contention in automotive systems.
Is the SN74AHC125QPWRG4 pin-compatible with non-automotive variants like SN74AHC125PWR?
Yes - the SN74AHC125QPWRG4 shares identical pinout, electrical behavior, and TSSOP-14 package dimensions with commercial-grade SN74AHC125PWR. However, the "Q" suffix denotes AEC-Q100 qualification, enhanced screening, and automotive-specific documentation - meaning hardware layout is interchangeable, but qualification status is not transferable for safety-critical applications.
Can the SN74AHC125QPWRG4 drive a 50 Ω transmission line directly?
Yes - the SN74AHC125QPWRG4 delivers ±8 mA output drive at 5 V, sufficient to source/sink into a 50 Ω line terminated at VCC/0 V (producing ~400 mV overshoot). For clean 50 Ω impedance matching, series termination near the driver output is recommended. TI's datasheet confirms performance with CL = 50 pF loads, validating suitability for short-run PCB traces in automotive modules.
What is the meaning of the "G4" suffix in SN74AHC125QPWRG4?
The "G4" suffix in SN74AHC125QPWRG4 indicates green packaging - meaning lead-free (Pb-free), RoHS-compliant construction with NiPdAu terminal finish and no brominated flame retardants. It reflects TI's standardized eco-labeling convention and does not affect electrical or thermal specifications; SN74AHC125QPWRG4 and SN74AHC125QPWR are functionally identical except for environmental compliance certification.
SN74AHC125QPWRG4 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:
- Discontinued at Digi-Key
- 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:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 14-TSSOP
SN74AHC125QPWRG4 FAQ
1.How can I place an order for SN74AHC125QPWRG4 through Aetrix?
Please submit a Request for Quotation (RFQ) for SN74AHC125QPWRG4 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 SN74AHC125QPWRG4 reliable?
The price and inventory of SN74AHC125QPWRG4 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SN74AHC125QPWRG4 is usually 5 days.
3.What payment methods are accepted for SN74AHC125QPWRG4?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SN74AHC125QPWRG4 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SN74AHC125QPWRG4?
SN74AHC125QPWRG4 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SN74AHC125QPWRG4 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 SN74AHC125QPWRG4?
For technical support, including SN74AHC125QPWRG4 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SN74AHC125QPWRG4 requirements.
6.How does Aetrix verify that SN74AHC125QPWRG4 is sourced from the original manufacturer or authorized distributors?
All SN74AHC125QPWRG4 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 SN74AHC125QPWRG4 meets industry standards.
7.What is the process for return or replacement of SN74AHC125QPWRG4?
All SN74AHC125QPWRG4 units undergo pre-shipment inspection (PSI). If there is an issue with SN74AHC125QPWRG4, 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 SN74AHC125QPWRG4 part is unused and in its original packaging.
Return procedure for SN74AHC125QPWRG4:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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