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NXP Semiconductors 74HCT125PW,112
- Part No.:
- 74HCT125PW,112
- Manufacturer:
- NXP Semiconductors
- Package:
- 14-TSSOP (0.173", 4.40mm Width)
- Datasheet:
-
74HCT125PW,112.pdf
- Description:
- IC BUFF NON-INVERT 5.5V 14TSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:5,887
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Product details
Overview
74HCT125PW,112 from Nexperia is a quad 3-state buffer/line driver IC with TTL-compatible inputs, operating from 4.5 V to 5.5 V, delivering propagation delay of 15–38 ns (VCC = 4.5 V), output drive capability of ±6 mA, and high-impedance OFF-state control via active-low enable inputs - used in bus interface isolation and data routing in industrial microcontroller peripheral expansion.
For engineers reviewing the 74HCT125PW,112 datasheet, 74HCT125PW,112 pinout, 74HCT125PW,112 application, or 74HCT125PW,112 equivalent, key selection criteria include TTL-level input compatibility, 3-state output timing (enable/disable times ≤ 42 ns), thermal derating behavior (7.3 mW/K above 81 °C), and TSSOP14 package footprint constraints for high-density PCB layouts.
Technical Context
This device implements four independent non-inverting buffers, each with dedicated active-low 3-state output enable (nOE) controlling high-impedance disconnection from the bus. Input clamping diodes allow safe interfacing to voltages exceeding VCC when current-limiting resistors are used.
It operates across -40 °C to +125 °C, supports CMOS-level output swing (VOH ≥ 3.7 V, VOL ≤ 0.4 V at IO = ±6 mA), and meets JEDEC JESD7A and JESD8C standards for supply voltage and noise immunity compliance.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage | 4.5 V to 5.5 V - ensures compatibility with 5 V TTL logic systems and stable operation under industrial rail tolerances. |
| Propagation Delay | 12–38 ns (VCC = 4.5 V, CL = 50 pF) - determines maximum data rate in bus buffering applications up to ~10 MHz. |
| Output Drive | ±6 mA - sufficient to drive standard TTL loads and moderate capacitive buses without external amplification. |
| Enable/Disable Time | 15–42 ns - defines minimum bus turnaround time when switching between multiple drivers on shared lines. |
| Input Thresholds | VIH = 2.0 V min, VIL = 0.8 V max - guarantees reliable recognition of standard TTL logic levels across temperature. |
| Operating Temperature | -40 °C to +125 °C - supports deployment in extended-temperature industrial and automotive-adjacent environments. |
| Power Dissipation Cap. | 24 pF - used to calculate dynamic power consumption (PD = CPD × VCC² × fi × N) for thermal budgeting. |
Pinout & Package
TSSOP14 plastic thin shrink small outline package (SOT402-1), 14-lead, body width 4.4 mm, 0.65 mm pitch - optimized for space-constrained PCBs while maintaining hand-solderability and reflow compatibility.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 4, 10, 13 | nOE (active-low enable) | Independent control per buffer; LOW enables output, HIGH forces high-impedance state for bus sharing. |
| 2, 5, 9, 12 | nA (data input) | Non-inverting TTL-compatible input; clamped to support overvoltage-safe interfacing. |
| 3, 6, 8, 11 | nY (data output) | CMOS-level buffered output with ±6 mA drive; transitions cleanly between logic states and high-Z. |
| 7 | GND | Reference ground for all I/O and internal circuitry; must be low-impedance for noise immunity. |
| 14 | VCC | Primary supply rail; decoupling capacitor required within 1 cm for stable switching performance. |
Key Features
| Feature | Design Value |
|---|---|
| TTL-compatible inputs | Enables direct connection to legacy 5 V microcontrollers and logic families without level-shifting. |
| 3-state outputs with independent enables | Allows four separate data paths to share one bus line without contention or signal collision. |
| Input clamping diodes | Permits safe interface to signals up to VCC + 0.5 V using series current-limiting resistors. |
| High noise immunity | Guaranteed 400 mV noise margin at VCC = 4.5 V, reducing susceptibility to EMI in industrial settings. |
| Extended temperature range | Rated from -40 °C to +125 °C - suitable for under-hood, factory automation, and power supply control modules. |
Applications
| Industrial Bus Isolation | Microcontroller Peripheral Expansion |
|---|---|
|
Use Scenario: Isolating multiple sensor modules from a shared RS-485 or parallel data bus in PLC backplanes. IC Role / Device Role / Timing Role: Quad buffer acts as directional gate, enabling only one module's data onto the bus at a time via coordinated OE control. Use Value: Prevents bus contention during hot-swap events and reduces signal reflections by isolating unterminated stubs. |
Use Scenario: Expanding GPIO count of an ARM Cortex-M4 MCU to drive 16-bit LCD segment drivers and keypad scan lines. IC Role / Device Role / Timing Role: Buffers provide current gain and level translation between MCU I/O and higher-capacitance display interfaces. Use Value: Maintains signal integrity at 1–5 MHz update rates while offloading drive burden from core processor pins. |
| Legacy System Interfacing | Test Equipment Signal Routing |
|
Use Scenario: Bridging 5 V TTL logic in aging test fixtures to modern FPGA-based controllers with mixed-voltage I/O banks. IC Role / Device Role / Timing Role: Acts as bidirectional level-tolerant repeater with configurable directionality per channel via OE. Use Value: Eliminates need for discrete resistor networks or dedicated level shifters, cutting BOM cost and board area. |
Use Scenario: Dynamic reconfiguration of analog/digital signal paths in automated test equipment (ATE) switch matrices. IC Role / Device Role / Timing Role: Provides fast, low-leakage signal gating (tEN/tDIS ≤ 42 ns) synchronized to test pattern generators. Use Value: Enables sub-microsecond path switching accuracy and <10 nA OFF-state leakage for precision measurement integrity. |
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 |
|---|---|---|---|
| 74HCT125D,653 | SO14 package (SOT108-1); 10.1 mW/K thermal derating above 100 °C vs. 7.3 mW/K for TSSOP14 | Better suited for through-hole prototyping or legacy SOIC footprints; lower thermal resistance but larger footprint | Select when board layout requires SOIC compatibility or higher power dissipation margin at elevated ambient temperatures |
| SN74HCT125PW | TI-manufactured TSSOP14 variant; identical logic function but different VIL/VIH thresholds (1.2 V/2.0 V vs. Nexperia's 0.8 V/2.0 V) | Slightly tighter input noise margin; may require validation in marginal signal integrity conditions | Choose for TI-design ecosystems or where second-source assurance is mandated, with verification of input threshold margins |
Compared with 74HCT125D,653, the 74HCT125PW,112 offers 30 % smaller PCB area and faster thermal response but requires stricter layout decoupling; versus SN74HCT125PW, it provides wider input voltage hysteresis and broader qualification history in industrial temperature cycling.
Availability
74HCT125PW,112 is available at Aetrix Electronics and suitable for industrial bus isolation, microcontroller peripheral expansion, legacy system interfacing, and test equipment signal routing requiring stable component supply across extended temperature ranges.
Supply support for 74HCT125PW,112 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 logic, discrete, and MOSFET solutions for industrial, automotive, and computing markets.
The 74HCT125 belongs to Nexperia's industry-standard logic family designed for robust, pin-compatible replacement of legacy 74-series devices in high-reliability embedded systems.
FAQ
What is the maximum clock/data rate supported by the 74HCT125PW,112?
The device does not operate as a clocked element but as a combinatorial buffer. Its 12–38 ns propagation delay (at VCC = 4.5 V, CL = 50 pF) supports reliable data transmission up to approximately 10 MHz on moderately loaded buses. For higher-speed applications, transition time (5–18 ns) and load capacitance must be tightly controlled to avoid signal distortion.
Can the 74HCT125PW,112 drive a 50 pF bus capacitance at 5 V?
Yes - the datasheet specifies dynamic characteristics at CL = 50 pF and VCC = 4.5 V, with tPD = 15–25 ns (typ/max). Output drive strength (±6 mA) and VOL/VOH specifications remain valid under these conditions, confirming full functionality with standard PCB trace and connector capacitance typical in industrial backplanes.
Is the 74HCT125PW,112 qualified for automotive applications?
No - this part is not AEC-Q100 qualified and lacks automotive-specific screening, burn-in, or failure rate reporting. While rated for -40 °C to +125 °C, it is intended for industrial and commercial use only; Nexperia explicitly states non-automotive qualification in its legal disclaimers.
How does the input clamping diode affect interfacing with 12 V sensors?
The integrated input clamp diodes allow safe connection to voltages up to VCC + 0.5 V (i.e., ≤5.5 V at VCC = 5 V). To interface with 12 V sensors, an external current-limiting resistor must be used to restrict IIK to ≤±20 mA, calculated as R ≥ (12 V − 5.5 V) / 20 mA = 325 Ω - verified in Section 7 limiting values.
74HCT125PW,112 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- NXP Semiconductors
- Series:
- 74HCT
- Package/Case:
- 14-TSSOP (0.173", 4.40mm Width)
- Packaging:
- Bulk
- 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:
- 6mA, 6mA
- Voltage - Supply:
- 4.5V ~ 5.5V
- Operating Temperature:
- -40°C ~ 125°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 14-TSSOP
74HCT125PW,112 FAQ
1.How can I place an order for 74HCT125PW,112 through Aetrix?
Please submit a Request for Quotation (RFQ) for 74HCT125PW,112 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 74HCT125PW,112 reliable?
The price and inventory of 74HCT125PW,112 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 74HCT125PW,112 is usually 5 days.
3.What payment methods are accepted for 74HCT125PW,112?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 74HCT125PW,112 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 74HCT125PW,112?
74HCT125PW,112 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 74HCT125PW,112 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 74HCT125PW,112?
For technical support, including 74HCT125PW,112 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 74HCT125PW,112 requirements.
6.How does Aetrix verify that 74HCT125PW,112 is sourced from the original manufacturer or authorized distributors?
All 74HCT125PW,112 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 74HCT125PW,112 meets industry standards.
7.What is the process for return or replacement of 74HCT125PW,112?
All 74HCT125PW,112 units undergo pre-shipment inspection (PSI). If there is an issue with 74HCT125PW,112, 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 74HCT125PW,112 part is unused and in its original packaging.
Return procedure for 74HCT125PW,112:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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