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NXP Semiconductors 74HC125D/AUJ
- Part No.:
- 74HC125D/AUJ
- Manufacturer:
- NXP Semiconductors
- Package:
- 14-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
74HC125D/AUJ.pdf
- Description:
- IC BUFFER NON-INVERT 6V 14SO
- Quantity:
- Payment:
- Shipping:
Inventory:1,578
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Product details
Overview
74HC125D/AUJ from Nexperia is a quad CMOS buffer/line driver with independent 3-state outputs, designed for bus interface and signal isolation in digital systems. It operates from 2.0 V to 6.0 V, delivers propagation delay as low as 9 ns at VCC = 6.0 V (CL = 50 pF), supports -40 °C to +125 °C ambient range, and features input clamp diodes enabling overvoltage-tolerant interfacing - used in industrial control backplanes and microcontroller I/O expansion.
For engineers reviewing the 74HC125D/AUJ datasheet, 74HC125D/AUJ pinout, 74HC125D/AUJ application, or 74HC125D/AUJ equivalent, key selection criteria include supply voltage compatibility (2.0–6.0 V), 3-state output timing (enable/disable times ≤32 ns), SO14 package thermal derating (10.1 mW/K above 100 °C), and CMOS-level input thresholds (VIH ≥3.15 V at VCC = 4.5 V).
Technical Context
This device implements four independent non-inverting buffers, each with an active-low output enable (nOE) controlling high-impedance state. Its CMOS architecture ensures rail-to-rail output swing, low static current (ICC ≤160 μA at +125 °C), and robust ESD protection (HBM >2000 V, CDM >1000 V). Input clamping diodes allow safe interfacing to signals exceeding VCC when used with current-limiting resistors.
Functional behavior follows strict truth table logic: nOE = LOW enables output (nY = nA); nOE = HIGH forces nY to high-impedance (Z). Timing parameters are fully characterized across -40 °C to +125 °C and multiple VCC levels (2.0 V, 4.5 V, 6.0 V), with propagation delay (tpd), enable time (ten), and disable time (tdis) all specified under CL = 50 pF load conditions.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage Range | 2.0 V to 6.0 V - supports mixed-voltage system interfacing and battery-powered operation down to 2 V. |
| Propagation Delay (tpd) | 9 ns (typ) at VCC = 6.0 V, CL = 50 pF - enables reliable 30+ MHz bus operation with margin. |
| Enable/Disable Time (ten/tdis) | 12 ns (typ) at VCC = 6.0 V - ensures fast bus arbitration and dynamic output control. |
| Output Drive Strength | ±7.8 mA (HIGH/LOW) at VCC = 6.0 V - sufficient to drive 50-pF loads and standard TTL inputs. |
| Input Thresholds (VIH/VIL) | VIH = 3.15 V min, VIL = 1.35 V max at VCC = 4.5 V - guarantees noise-immune CMOS-level switching. |
| Operating Temperature | -40 °C to +125 °C - qualified for extended industrial and under-hood automotive-adjacent environments. |
| ESD Protection | HBM >2000 V, CDM >1000 V - meets JEDEC JS-001/JS-002 Class 2/C3 for robust board-level handling. |
Pinout & Package
74HC125D/AUJ is housed in a plastic small outline package (SO14), SOT108-1, with 14 leads and 3.9 mm body width. The package supports surface-mount reflow and is rated for operation up to +125 °C ambient.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 4, 10, 13 (1OE–4OE) | Active-low output enable | Individually disables corresponding buffer output to high-impedance state; allows per-channel bus control. |
| 2, 5, 9, 12 (1A–4A) | Data input | CMOS-compatible input accepting 0–VCC logic levels; includes internal clamp diodes for overvoltage tolerance. |
| 3, 6, 8, 11 (1Y–4Y) | Buffered output | Non-inverting, 3-state output capable of sourcing/sinking ±7.8 mA at VCC = 6.0 V. |
| 7 | GND | Ground reference (0 V) for all internal circuitry and I/O; must be low-impedance connection. |
| 14 | VCC | Primary power supply (2.0–6.0 V); decoupling capacitor required near pin for stable switching. |
Key Features
| Feature | Design Value |
|---|---|
| Wide supply voltage range | 2.0 V to 6.0 V operation enables direct interface with 3.3 V and 5 V logic families without level shifters. |
| Independent 3-state control | Four separate nOE inputs permit selective bus loading and multi-drop line driving without external gating logic. |
| High noise immunity | CMOS input structure with >40 % VCC noise margin at VCC = 4.5 V ensures reliable operation in electrically noisy industrial settings. |
| Latch-up immunity | Exceeds 100 mA per JESD78 Class II Level B - prevents destructive latch-up during transient overvoltage events. |
| Input clamp diodes | Integrated diodes allow safe connection to voltages up to VCC + 0.5 V using series current-limiting resistors. |
Applications
| Industrial PLC Backplane | Microcontroller I/O Expansion |
|---|---|
Use Scenario: Isolating and buffering address/data lines between CPU module and modular I/O cards in programmable logic controllers. IC Role / Device Role / Timing Role: Quad buffer provides direction-controlled, high-impedance isolation on shared bus segments during card hot-swap or fault conditions. Use Value: Enables deterministic bus arbitration via independent OE control, reducing signal contention and ensuring clean transitions at up to 30 MHz. | Use Scenario: Expanding GPIO count of ARM Cortex-M or RISC-V MCU by driving external peripherals (ADCs, DACs, displays) via parallel interface. IC Role / Device Role / Timing Role: Acts as level-shifting, fan-out buffer with 3-state outputs to prevent bus conflicts during peripheral initialization or sleep mode. Use Value: Delivers <12 ns enable/disable timing and ±7.8 mA drive strength - sufficient to meet setup/hold timing of 16-bit parallel ADCs at 1 MSPS. |
| Test Equipment Signal Routing | Digital Audio Data Bus Interface |
Use Scenario: Multiplexing and routing digital test patterns between FPGA-based pattern generator and DUT pins in ATE systems. IC Role / Device Role / Timing Role: Provides glitch-free, low-skew signal distribution with per-channel enable for dynamic path selection. Use Value: Propagation delay matching <5 ns between channels and 9 ns tpd ensure sub-30 ns timing accuracy across 14-pin bus. | Use Scenario: Interfacing I²S or TDM audio data streams between codec and DSP in professional audio mixers. IC Role / Device Role / Timing Role: Buffers serial clock (BCLK), word select (WS), and data lines while isolating source impedance and minimizing jitter accumulation. Use Value: Low input capacitance (CI = 3.5 pF) and fast transition time (tt = 4 ns typ) preserve signal integrity on 3.072 MHz BCLK lines. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar quad 3-state buffer applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 74HC125PW | TSSOP14 package (SOT402-1), 4.4 mm body width, 7.3 mW/K thermal derating above 81 °C | Better PCB space efficiency but lower thermal mass; requires tighter reflow profile control | Select when board area is constrained and thermal load is moderate (<200 mW). |
| SN74HC125DR | Texas Instruments part in SOIC-14; identical logic function but different VIL/VIH thresholds at VCC = 2.0 V (TI: VIH = 1.5 V min vs Nexperia: 1.5 V min - same spec) | Pin-compatible but not identical AC characteristics; tpd = 19 ns (max) at VCC = 2.0 V vs Nexperia's 100 ns (max) | Use only after verifying timing margins in low-voltage (2.0 V) operation; not drop-in for high-speed designs. |
Compared with 74HC125PW and SN74HC125DR, the 74HC125D/AUJ offers superior high-speed performance at 6.0 V (9 ns tpd), optimized thermal derating for sustained industrial operation, and guaranteed clamp diode functionality for overvoltage-safe interfacing - making it preferred for bus-critical, thermally demanding, or mixed-voltage applications.
Availability
74HC125D/AUJ is available at Aetrix Electronics and suitable for industrial automation, test equipment, and embedded computing applications requiring stable component supply, long-term lifecycle support, and guaranteed traceability.
Supply support for 74HC125D/AUJ 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
Nexperia is a global semiconductor expert focused on essential efficiency technologies, delivering high-performance, reliable discrete, logic, and MOSFET solutions for automotive, industrial, and consumer markets.
The 74HC125D/AUJ belongs to Nexperia's 74HC logic family, engineered for low-power, high-noise-immunity digital interfacing in space- and energy-constrained systems where reliability across extended temperature ranges is critical.
FAQ
What is the maximum operating supply voltage for the 74HC125D/AUJ?
The absolute maximum supply voltage (VCC) for the 74HC125D/AUJ is +7.0 V, but the recommended operating range is 2.0 V to 6.0 V. Operation beyond 6.0 V risks violating limiting values and may cause permanent damage. For reliable long-term use, maintain VCC within 2.0–6.0 V per the datasheet's Recommended Operating Conditions table.
Does the 74HC125D/AUJ support 3.3 V logic systems?
Yes, the 74HC125D/AUJ fully supports 3.3 V operation: VIH is guaranteed ≥2.1 V and VIL ≤1.35 V at VCC = 4.5 V, and its 2.0–6.0 V range includes 3.3 V nominal supplies. At VCC = 3.3 V, VOH exceeds 3.1 V and VOL remains below 0.26 V under 6 mA load - meeting standard 3.3 V LVTTL and LVCMOS interface requirements.
How does the 74HC125D/AUJ differ from the 74HCT125D variant?
The 74HC125D/AUJ uses CMOS input thresholds (VIH ≈ 0.7×VCC), while the 74HCT125D uses TTL-compatible thresholds (VIH = 2.0 V fixed). This makes the 74HC125D/AUJ ideal for pure CMOS systems, whereas 74HCT125D better interfaces with legacy 5 V TTL outputs. Both share identical pinout, package, and output drive capability.
Can the 74HC125D/AUJ drive a 50 pF load at 10 MHz without signal degradation?
Yes - the 74HC125D/AUJ is characterized with CL = 50 pF in its Dynamic Characteristics table. At VCC = 6.0 V, it achieves 9 ns typical propagation delay and 4 ns typical transition time, supporting clean 10 MHz square waves (100 ns period) with >40 ns rise/fall margin. Output drive strength (±7.8 mA) ensures adequate slew rate into 50 pF.
Is the 74HC125D/AUJ suitable for automotive applications?
No - the 74HC125D/AUJ is not automotive-qualified. While it operates from -40 °C to +125 °C, Nexperia explicitly states in its legal disclaimers that non-automotive-qualified products like the 74HC125D/AUJ are not tested or warranted for automotive use. For automotive applications, select AEC-Q100 qualified equivalents such as the 74HC125-Q100.
74HC125D/AUJ Specifications
- Product attributes
- Attribute value
- Manufacturer:
- NXP Semiconductors
- Series:
- 74HC
- Package/Case:
- 14-SOIC (0.154", 3.90mm 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:
- 7.8mA, 7.8mA
- Voltage - Supply:
- 2V ~ 6V
- Operating Temperature:
- -40°C ~ 125°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 14-SO
74HC125D/AUJ FAQ
1.How can I place an order for 74HC125D/AUJ through Aetrix?
Please submit a Request for Quotation (RFQ) for 74HC125D/AUJ 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 74HC125D/AUJ reliable?
The price and inventory of 74HC125D/AUJ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 74HC125D/AUJ is usually 5 days.
3.What payment methods are accepted for 74HC125D/AUJ?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 74HC125D/AUJ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 74HC125D/AUJ?
74HC125D/AUJ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 74HC125D/AUJ 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 74HC125D/AUJ?
For technical support, including 74HC125D/AUJ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 74HC125D/AUJ requirements.
6.How does Aetrix verify that 74HC125D/AUJ is sourced from the original manufacturer or authorized distributors?
All 74HC125D/AUJ 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 74HC125D/AUJ meets industry standards.
7.What is the process for return or replacement of 74HC125D/AUJ?
All 74HC125D/AUJ units undergo pre-shipment inspection (PSI). If there is an issue with 74HC125D/AUJ, 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 74HC125D/AUJ part is unused and in its original packaging.
Return procedure for 74HC125D/AUJ:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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