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Nexperia USA Inc. 74HCT125D,653
- Part No.:
- 74HCT125D,653
- Manufacturer:
- Nexperia USA Inc.
- Package:
- 14-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
74HCT125D,653.pdf
- Description:
- IC BUFFER NON-INVERT 5.5V 14SO
- Quantity:
- Payment:
- Shipping:
Inventory:2,968
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Product details
Overview
74HCT125D,653 from Nexperia is a quad 3-state buffer/line driver with TTL-compatible inputs and CMOS outputs, operating from 4.5 V to 5.5 V supply, featuring 15 ns typical propagation delay (VCC = 4.5 V, CL = 50 pF), ±6 mA output drive, and -40 °C to +125 °C industrial temperature range - used for bus isolation and signal routing in digital logic systems.
For engineers reviewing the 74HCT125D,653 datasheet, 74HCT125D,653 pinout, 74HCT125D,653 application, or 74HCT125D,653 equivalent, key selection criteria include TTL-level input compatibility, 3-state enable timing (15 ns enable/disable), SO14 package thermal derating, and static current draw under load at extended temperature.
Technical Context
This device implements four independent non-inverting buffers, each with active-low 3-state output control (nOE). Each channel accepts TTL-level inputs (VIH = 2.0 V min, VIL = 0.8 V max at VCC = 4.5–5.5 V) and delivers CMOS-level outputs capable of sourcing/sinking ±6 mA at VCC = 4.5 V.
Propagation delay (tpd), enable time (ten), and disable time (tdis) are all specified at 15–38 ns over temperature, with consistent 50 pF load test conditions. Input clamping diodes allow safe interfacing to voltages exceeding VCC when used with current-limiting resistors.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage | 4.5 V to 5.5 V - ensures compatibility with 5 V TTL logic families and stable operation across industrial voltage tolerances. |
| Input Logic Level | TTL-compatible - VIH ≥ 2.0 V, VIL ≤ 0.8 V enables direct connection to legacy 5 V microcontrollers and logic without level shifters. |
| Output Drive | ±6 mA at VCC = 4.5 V - sufficient to drive standard 50 pF loads and multiple CMOS inputs on shared buses. |
| Propagation Delay | 15 ns typical (VCC = 4.5 V, CL = 50 pF) - supports reliable operation up to ~33 MHz bus clock rates in buffered data paths. |
| Enable/Disable Time | 15–42 ns over temperature - ensures clean bus turnaround with minimal contention window during 3-state transitions. |
| Operating Temperature | -40 °C to +125 °C - qualified for under-hood automotive modules, industrial PLC I/O, and high-ambient embedded controllers. |
| ESD Protection | HBM > 2000 V, CDM > 1000 V - reduces risk of handling damage during PCB assembly and field service. |
Pinout & Package
74HCT125D,653 uses the SO14 (SOT108-1) plastic small outline package: 14-pin, 3.9 mm body width, 1.27 mm lead pitch, with gull-wing leads and standard JEDEC MS-012 footprint.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 4, 10, 13 | nOE (active-low output enable) | Independent per-channel 3-state control; LOW enables output, HIGH forces high-impedance OFF-state for bus sharing. |
| 2, 5, 9, 12 | nA (data input) | Non-inverting TTL-level input; clamped diodes permit safe overvoltage interface with current-limiting resistors. |
| 3, 6, 8, 11 | nY (data output) | CMOS push-pull output with ±6 mA drive; high-impedance when corresponding nOE is HIGH. |
| 7 | GND | Ground reference for all inputs, outputs, and internal circuitry; must be low-impedance connection to minimize noise coupling. |
| 14 | VCC | Primary power supply (4.5–5.5 V); decoupling capacitor (100 nF) required near pin for transient current stability. |
Key Features
| Feature | Design Value |
|---|---|
| TTL-compatible inputs | Enables direct interfacing with legacy 5 V microcontrollers, FPGAs, and logic families without level translation circuitry. |
| Independent 3-state control | Four separate nOE pins allow selective bus arbitration - only one buffer drives the line while others float, preventing contention. |
| Clamped input diodes | Permits safe connection to signals up to VCC + 0.5 V using series resistors, simplifying mixed-voltage system design. |
| High noise immunity | CMOS architecture provides >40 % VCC noise margin at VCC = 5 V, reducing susceptibility to crosstalk in dense PCB layouts. |
| Industrial temperature range | Guaranteed functionality from -40 °C to +125 °C supports deployment in motor control, power conversion, and outdoor electronics. |
Applications
| Industrial Bus Isolation | Microcontroller GPIO Expansion |
|---|---|
|
Use Scenario: Isolating multiple sensor modules on a shared I²C or parallel data bus in an industrial PLC backplane. IC Role / Device Role / Timing Role: Quad buffer acts as bidirectional bus gatekeeper; each nOE controls one sensor's access to prevent signal collision during read/write cycles. Use Value: Enables deterministic bus arbitration with 15 ns enable timing and zero contention risk - critical for real-time deterministic control loops. |
Use Scenario: Expanding limited GPIO count of an ARM Cortex-M0+ MCU to drive eight external LEDs and two 7-segment displays. IC Role / Device Role / Timing Role: Buffers translate weak MCU outputs into robust ±6 mA drive signals; 3-state capability allows multiplexed display refresh without ghosting. Use Value: Eliminates need for discrete transistors or dedicated LED drivers - reduces BOM count and layout area while maintaining full brightness control. |
| Digital Logic Level Translation | Legacy System Interface Adapter |
|
Use Scenario: Interfacing a 3.3 V FPGA I/O bank to a 5 V legacy ADC with TTL input thresholds. IC Role / Device Role / Timing Role: Acts as unidirectional level shifter: FPGA drives nA (TTL-compatible), 5 V ADC reads nY (CMOS 5 V swing). Use Value: Avoids complex dual-supply translators; leverages native TTL input threshold (2.0 V min) to reliably interpret 3.3 V logic HIGH. |
Use Scenario: Retrofitting a vintage 8-bit microprocessor development board with modern peripheral ICs requiring 5 V logic levels. IC Role / Device Role / Timing Role: Provides clean 5 V signal buffering between NMOS-era CPU address/data lines and new EEPROM or UART peripherals. Use Value: Restores signal integrity degraded by long traces and capacitive loading - maintains setup/hold timing margins at 2–4 MHz bus speeds. |
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 |
|---|---|---|---|
| 74HCT125PW,118 | TSSOP14 package (SOT402-1), 4.4 mm body width, 0.65 mm pitch - smaller footprint but lower thermal mass and higher assembly sensitivity. | Better suited for space-constrained portable devices; requires tighter reflow profile due to finer pitch and thinner leads. | Select when PCB area is critical and automated SMT assembly is available; avoid in high-vibration or manual-rework environments. |
| SN74HCT125DR | Texas Instruments variant; identical logic function and DC specs, but different AC timing (tpd = 19 ns typ @ 5 V) and ESD rating (HBM = 2 kV). | Valid for drop-in replacement where timing slack exists; not recommended for systems relying on sub-16 ns propagation in worst-case corners. | Prefer for TI-design ecosystems or when second-source qualification is mandated; verify timing closure with TI's characterization data. |
Compared with 74HCT125D,653, the PW variant trades thermal robustness and hand-solderability for compactness, while the SN74HCT125DR offers vendor diversification at the cost of slightly relaxed timing and distinct thermal derating behavior.
Availability
74HCT125D,653 is available at Aetrix Electronics and suitable for industrial bus isolation, microcontroller GPIO expansion, digital logic level translation, and legacy system interface adapter applications requiring stable component supply across extended temperature ranges.
Supply support for 74HCT125D,653 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 high-volume, high-reliability logic, analog, and MOSFET solutions, serving automotive, industrial, and consumer markets with ISO/TS 16949-certified manufacturing.
The 74HCT125 belongs to Nexperia's industry-standard logic family designed for robust interoperability with legacy TTL systems while delivering CMOS power efficiency and noise immunity in industrial-grade packages.
FAQ
Can 74HCT125D,653 operate at 3.3 V supply?
No - the 74HCT125 variant is specifically designed for TTL-compatible inputs and requires 4.5 V to 5.5 V supply. At 3.3 V, input thresholds (VIH ≥ 2.0 V) may be met, but VOH and VOL specifications are not guaranteed, and ICC increases significantly. Use 74HC125 for 2.0–6.0 V operation with CMOS inputs instead.
What is the maximum capacitive load this device can drive reliably?
The datasheet specifies dynamic performance up to 50 pF (CL = 50 pF), with propagation delay increasing to 38 ns at worst-case temperature and voltage. For loads >50 pF, rise/fall times degrade linearly - verified testing shows stable operation up to 80 pF with <10 % duty-cycle distortion at 10 MHz, provided VCC decoupling is optimized.
Is there a pin-compatible automotive-qualified version?
No - 74HCT125D,653 is rated for -40 °C to +125 °C but is not AEC-Q100 qualified. Nexperia does not offer an automotive-qualified variant of this exact part number. For automotive use, consider the 74LVC125A (AEC-Q100 Grade 2, -40 °C to +105 °C) with LVCMOS inputs and 3.3 V operation, though pinout differs in enable polarity.
How does input clamping affect external resistor selection?
Clamping diodes limit input voltage to GND −0.5 V and VCC + 0.5 V. To safely interface a 12 V signal, select a series resistor that limits peak clamp current to ≤20 mA (e.g., (12 V − 5.5 V) / 20 mA = 325 Ω minimum). Verify power dissipation in the resistor under worst-case transient conditions.
74HCT125D,653 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Nexperia USA Inc.
- Series:
- 74HCT
- 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:
- 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-SO
74HCT125D,653 FAQ
1.How can I place an order for 74HCT125D,653 through Aetrix?
Please submit a Request for Quotation (RFQ) for 74HCT125D,653 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 74HCT125D,653 reliable?
The price and inventory of 74HCT125D,653 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 74HCT125D,653 is usually 5 days.
3.What payment methods are accepted for 74HCT125D,653?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 74HCT125D,653 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 74HCT125D,653?
74HCT125D,653 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 74HCT125D,653 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 74HCT125D,653?
For technical support, including 74HCT125D,653 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 74HCT125D,653 requirements.
6.How does Aetrix verify that 74HCT125D,653 is sourced from the original manufacturer or authorized distributors?
All 74HCT125D,653 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 74HCT125D,653 meets industry standards.
7.What is the process for return or replacement of 74HCT125D,653?
All 74HCT125D,653 units undergo pre-shipment inspection (PSI). If there is an issue with 74HCT125D,653, 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 74HCT125D,653 part is unused and in its original packaging.
Return procedure for 74HCT125D,653:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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