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Texas Instruments SN74HC125APW
- Part No.:
- SN74HC125APW
- Manufacturer:
- Texas Instruments
- Package:
- 14-TSSOP (0.173", 4.40mm Width)
- Datasheet:
-
SN74HC125APW.pdf
- Description:
- IC BUFFER NON-INVERT 6V 14TSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:2,614
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Product details
Overview
SN74HC125APW from NXP Semiconductors is a quad 3-state buffer/line driver with independent active-low output enable inputs (1OE–4OE), CMOS-level compatible inputs, and rail-to-rail output swing. It operates from 2.0 V to 6.0 V, supports −40 °C to +125 °C ambient range, and delivers 7.8 mA sink/source drive at 6.0 V-used in bidirectional bus interfacing and logic level translation in industrial control systems.
For engineers reviewing the SN74HC125APW datasheet, SN74HC125APW pinout, SN74HC125APW application, or SN74HC125APW equivalent, key selection criteria include its 3-state output control timing (enable/disable <32 ns at 6.0 V), input clamp diode support for overvoltage-tolerant interfacing, low static current (<160 μA at 125 °C), and TSSOP-14 package compatibility with high-density PCB layouts.
Technical Context
This device implements four independent non-inverting buffers, each with dedicated active-low 3-state control. Output disable is synchronous with OE transition, and propagation delay from input to output is 9–26 ns depending on supply voltage and load. The internal structure includes input clamp diodes enabling safe interface to signals exceeding VCC when used with current-limiting resistors.
Static characteristics are specified across three temperature ranges (−40 °C to +125 °C), with VIH = 4.2 V and VIL = 1.8 V at VCC = 6.0 V, VOH ≥ 5.48 V and VOL ≤ 0.4 V at IO = ±7.8 mA, and input leakage ≤ ±1.0 μA. Dynamic power dissipation is characterized by CPD = 22 pF.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage | 2.0 V to 6.0 V - enables direct interface with 3.3 V and 5 V logic domains without level shifters. |
| Output Drive | ±7.8 mA at VCC = 6.0 V - sufficient to drive 50 pF loads with <18 ns transition time and minimal signal distortion. |
| Propagation Delay | 9 ns (typ) at VCC = 6.0 V, CL = 50 pF - supports >30 MHz data rates in buffered bus applications. |
| Enable/Disable Time | 12 ns (typ) at VCC = 6.0 V - ensures fast bus arbitration and clean output isolation during state transitions. |
| Input Clamp Diodes | Integrated - allows safe connection of inputs to voltages up to VCC + 0.5 V using external current-limiting resistors. |
| Operating Temperature | −40 °C to +125 °C - qualified for under-hood automotive modules and industrial motor drives. |
| ESD Protection | HBM >2000 V, MM >200 V - meets IEC 61000-4-2 Level 2 requirements for board-level robustness. |
Pinout & Package
TSSOP-14 package (SOT402-1), 4.4 mm body width, 0.65 mm lead pitch, surface-mount, RoHS-compliant.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 4, 10, 13 | 1OE, 2OE, 3OE, 4OE | Active-low output enable - each controls one buffer independently; pulled HIGH disables output to high-impedance state. |
| 2, 5, 9, 12 | 1A, 2A, 3A, 4A | Data inputs - CMOS-compatible; accept 0 V to VCC with hysteresis-free switching thresholds. |
| 3, 6, 8, 11 | 1Y, 2Y, 3Y, 4Y | Buffered outputs - 3-state capable; present inverted or non-inverted logic (non-inverting here) when enabled. |
| 7 | GND | Ground reference - must be low-impedance return path for all output currents and supply decoupling. |
| 14 | VCC | Positive supply - requires local 100 nF ceramic decoupling capacitor placed within 3 mm of pin. |
Key Features
| Feature | Design Value |
|---|---|
| Quad independent 3-state buffers | Enables selective routing of four signal lines onto shared buses without contention or loading penalties. |
| CMOS input levels | VIH/VIL thresholds scale with VCC - simplifies mixed-voltage system design and eliminates need for external bias networks. |
| Input clamp diodes | Permits safe interface to overvoltage sources (e.g., 12 V sensors) using series resistors - reduces BOM count and layout area. |
| High noise immunity | Typical VIH − VIL = 2.4 V at VCC = 6.0 V - rejects >1.2 V of common-mode noise on data lines in electrically noisy environments. |
| Low quiescent current | ICC ≤ 160 μA at +125 °C - minimizes standby power in battery-backed or thermally constrained applications. |
Applications
| Industrial PLC I/O Expansion | Microcontroller GPIO Multiplexing |
|---|---|
|
Use Scenario: Expanding digital I/O count on a programmable logic controller mainboard using shared parallel data buses. IC Role / Device Role / Timing Role: SN74HC125APW acts as a direction-controlled bus buffer, isolating microcontroller pins from field-side transceivers during configuration writes. Use Value: Enables hot-swappable module detection via controlled bus enable sequencing, reducing firmware complexity and eliminating bus contention faults. |
Use Scenario: Sharing limited MCU GPIOs between multiple peripherals (e.g., display, keypad, sensor array) using time-multiplexed addressing. IC Role / Device Role / Timing Role: SN74HC125APW provides isolated, glitch-free signal routing under software-controlled OE signals synchronized to peripheral access windows. Use Value: Eliminates need for discrete MOSFET switches or complex CPLD glue logic, cutting PCB layer count and validation effort. |
| Legacy Bus Interface Translation | Test Equipment Signal Conditioning |
|
Use Scenario: Interfacing modern 3.3 V FPGA I/O banks to legacy 5 V TTL data buses in automated test fixtures. IC Role / Device Role / Timing Role: SN74HC125APW serves as a unidirectional level translator with 3-state isolation, preventing back-drive during bus arbitration. Use Value: Achieves reliable 5 V-tolerant input operation without external pull-ups or voltage dividers, maintaining <20 ns timing margins. |
Use Scenario: Driving calibrated reference signals into high-capacitance probe fixtures or cable assemblies in benchtop ATE systems. IC Role / Device Role / Timing Role: SN74HC125APW functions as a low-skew, high-drive buffer stage to maintain signal integrity across 2 m coaxial cables. Use Value: Delivers <15 ns transition time into 100 pF loads, preserving edge fidelity required for jitter-sensitive parametric measurements. |
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 |
|---|---|---|---|
| SN74HCT125PW | TTL-compatible inputs (VIH = 2.0 V min); identical pinout, timing, and package. | Better suited for direct interface with legacy 5 V TTL outputs without pull-up resistors. | Select SN74HCT125PW when driving from standard 5 V TTL sources; otherwise SN74HC125APW offers wider VCC range and lower ICC. |
| MC74HC125ADTR2G | Identical logic function and DC specs; different manufacturer (onsemi), SOT-23-14 variant with same footprint but tighter thermal resistance. | Preferred where enhanced thermal performance is needed in compact enclosures with limited airflow. | Choose MC74HC125ADTR2G only if validated thermal margin is insufficient with NXP's TSSOP-14; otherwise SN74HC125APW ensures full NXP qualification traceability. |
Compared with SN74HCT125PW, SN74HC125APW provides broader supply flexibility (2.0–6.0 V vs. 4.5–5.5 V) and lower leakage at temperature extremes; compared with MC74HC125ADTR2G, it offers NXP's extended industrial temperature validation and documented ESD robustness per JESD22-A114F/A115-A.
Availability
SN74HC125APW is available at Aetrix Electronics and suitable for industrial automation, test equipment, and embedded control applications requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for SN74HC125APW 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
NXP Semiconductors is a global semiconductor company headquartered in Eindhoven, Netherlands, specializing in secure connectivity solutions for automotive, industrial, and IoT markets.
The SN74HC125APW belongs to NXP's 74HC logic family, designed for high-noise-immunity, low-power digital interfacing in space-constrained industrial and automotive control units.
FAQ
What is the maximum operating voltage for SN74HC125APW?
The absolute maximum supply voltage for SN74HC125APW is +7.0 V, but the recommended operating range is 2.0 V to 6.0 V per NXP's datasheet Rev. 6. Operation above 6.0 V risks exceeding limiting values for ICC and Ptot, potentially degrading long-term reliability. For sustained use, SN74HC125APW should be powered within 2.0–6.0 V with appropriate decoupling.
Does SN74HC125APW support 3.3 V logic levels?
Yes, SN74HC125APW fully supports 3.3 V operation: VIH = 2.31 V (min) and VIL = 1.05 V (max) at VCC = 3.3 V, with VOH ≥ 3.2 V and VOL ≤ 0.33 V at 6 mA load. Its CMOS input thresholds scale with VCC, ensuring robust noise margins and compatibility with standard 3.3 V microcontrollers and FPGAs.
Can SN74HC125APW drive a 50 pF capacitive load reliably?
Yes, SN74HC125APW is characterized for CL = 50 pF in its dynamic specifications: propagation delay is 11 ns (typ) and transition time is 5 ns (typ) at VCC = 4.5 V. At 6.0 V, rise/fall times remain ≤15 ns, confirming reliable signal integrity for standard PCB traces and moderate-length interconnects.
Is SN74HC125APW pin-compatible with SN74HCT125PW?
Yes, SN74HC125APW and SN74HCT125PW share identical TSSOP-14 pinout, package dimensions, and functional block diagram. The only electrical difference is input threshold compatibility: SN74HC125APW uses CMOS-level inputs (VIH ≈ 0.7×VCC), while SN74HCT125PW uses TTL-level inputs (VIH = 2.0 V fixed). No PCB changes are required for substitution.
What is the thermal performance of SN74HC125APW in TSSOP-14?
For the TSSOP-14 package (SOT402-1), SN74HC125APW has a thermal resistance θJA of 130 K/W (typ) and derates linearly at 5.5 mW/K above +60 °C. At 125 °C ambient and 500 mW total power dissipation, junction temperature remains within safe limits when mounted on 2-layer FR-4 with standard copper pour.
SN74HC125APW Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- 74HC
- 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:
- 7.8mA, 7.8mA
- Voltage - Supply:
- 2V ~ 6V
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 14-TSSOP
SN74HC125APW FAQ
1.How can I place an order for SN74HC125APW through Aetrix?
Please submit a Request for Quotation (RFQ) for SN74HC125APW 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 SN74HC125APW reliable?
The price and inventory of SN74HC125APW are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SN74HC125APW is usually 5 days.
3.What payment methods are accepted for SN74HC125APW?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SN74HC125APW transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SN74HC125APW?
SN74HC125APW orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SN74HC125APW 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 SN74HC125APW?
For technical support, including SN74HC125APW datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SN74HC125APW requirements.
6.How does Aetrix verify that SN74HC125APW is sourced from the original manufacturer or authorized distributors?
All SN74HC125APW 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 SN74HC125APW meets industry standards.
7.What is the process for return or replacement of SN74HC125APW?
All SN74HC125APW units undergo pre-shipment inspection (PSI). If there is an issue with SN74HC125APW, 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 SN74HC125APW part is unused and in its original packaging.
Return procedure for SN74HC125APW:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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