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Nexperia USA Inc. 74HCT125D,652
- Part No.:
- 74HCT125D,652
- Manufacturer:
- Nexperia USA Inc.
- Package:
- 14-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
74HCT125D,652.pdf
- Description:
- IC BUFFER NON-INVERT 5.5V 14SO
- Quantity:
- Payment:
- Shipping:
Inventory:3,743
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Product details
Overview
74HCT125D,652 from Nexperia is a quad 3-state buffer/line driver with TTL-compatible inputs, operating from 4.5 V to 5.5 V, featuring 15 ns typical propagation delay at 5 V, ±6 mA output drive, and SO14 (SOT108-1) package. It enables bidirectional bus isolation in microcontroller peripheral interfaces, data multiplexing, and level translation between legacy TTL and CMOS logic domains.
For engineers reviewing the 74HCT125D,652 datasheet, 74HCT125D,652 pinout, 74HCT125D,652 application, or 74HCT125D,652 equivalent, key selection criteria include TTL-level input compatibility, 3-state enable timing (15 ns enable/disable), SO14 thermal derating (10.1 mW/K above 100 °C), and guaranteed operation from –40 °C to +125 °C.
Technical Context
This device implements four independent non-inverting buffers, each with an active-low 3-state output enable (nOE). Each channel accepts TTL-level inputs (VIH ≥ 2.0 V, VIL ≤ 0.8 V at VCC = 5 V) and drives CMOS-compatible loads up to ±6 mA.
Propagation delay (nA→nY) is 15 ns typ / 38 ns max at VCC = 4.5 V and CL = 50 pF; enable/disable times (nOE→nY) match propagation delay specs, ensuring synchronous bus control. Input clamp 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 standard 5 V TTL and mixed-voltage systems without level shifters. |
| Input Logic Levels | TTL-compatible (VIH ≥ 2.0 V, VIL ≤ 0.8 V @ 5 V) - Directly interfaces with legacy 74LS/74F outputs without pull-ups or translators. |
| Output Drive | ±6 mA @ VOH/VOL - Sufficient to drive 10 LSTTL loads or 20 CMOS inputs while maintaining rail-to-rail swing. |
| Propagation Delay | 15 ns typ @ VCC = 4.5 V, CL = 50 pF - Enables reliable operation in 30 MHz bus environments with margin. |
| Operating Temperature | –40 °C to +125 °C - Qualified for under-hood automotive modules, industrial PLC I/O, and extended-range embedded controllers. |
| Power Dissipation | 160 μA ICC max @ 5.5 V, –40 °C to +125 °C - Supports low-quiescent-power standby modes in battery-backed systems. |
| ESD Protection | HBM > 2000 V, CDM > 1000 V - Reduces handling sensitivity and improves board-level robustness during assembly and field service. |
Pinout & Package
74HCT125D,652 uses the SO14 (SOT108-1) plastic small outline package: 14-pin, 3.9 mm body width, 1.27 mm lead pitch, gull-wing leads, JEDEC MS-012 compliant. Thermal resistance θJA = 99 K/W; Ptot derates linearly at 10.1 mW/K above 100 °C.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 4, 10, 13 (1OE–4OE) | Active-low output enable | Independent per-channel control; HIGH forces high-impedance state, enabling bus sharing without contention. |
| 2, 5, 9, 12 (1A–4A) | Data input | TTL-compatible inputs with clamp diodes; tolerate VI > VCC when series current limiting is applied. |
| 3, 6, 8, 11 (1Y–4Y) | Buffered output | Non-inverting, 3-state outputs capable of sourcing/sinking ±6 mA while maintaining VOH ≥ 3.7 V and VOL ≤ 0.4 V. |
| 7 (GND) | Ground reference | Primary return path for all I/O and supply currents; must be low-inductance connection to minimize ground bounce. |
| 14 (VCC) | Supply voltage | 5 V nominal supply; decoupling capacitor (100 nF ceramic) required within 5 mm of this pin for stable switching. |
Key Features
| Feature | Design Value |
|---|---|
| Wide temperature range | –40 °C to +125 °C operation - Eliminates need for external thermal derating in engine control units and motor drives. |
| Input clamp diodes | Integrated protection on all inputs - Allows safe interface to 12 V sensor signals using simple series resistors (e.g., 10 kΩ). |
| Latch-up immunity | Exceeds 100 mA per JESD78 Class II Level B - Prevents destructive latch-up during transient overvoltage events on PCB traces. |
| Low dynamic power | CPD = 24 pF - Limits switching power to < 600 μW per channel at 1 MHz, critical for low-power IoT node designs. |
| JEDEC compliance | JESD7A (2.0–6.0 V) and JESD8C (2.7–3.6 V) - Guarantees interoperability across legacy and modern logic families in mixed-supply systems. |
Applications
| Microcontroller Bus Expansion | Industrial I/O Module |
|---|---|
|
Use Scenario: Expanding GPIO count on an ARM Cortex-M4 MCU by connecting parallel peripherals (ADCs, DACs, GPIO expanders) via shared 8-bit data bus. IC Role / Device Role / Timing Role: Quad buffer isolates MCU data lines from peripheral loading; 3-state control synchronizes with address decode to prevent bus contention. Use Value: Enables deterministic 30 MHz bus timing with 15 ns propagation delay and matched enable/disable latency, reducing firmware overhead for bus arbitration. |
Use Scenario: Isolating programmable logic controller (PLC) backplane signals from field-side analog/digital I/O cards subject to EMI and ground potential differences. IC Role / Device Role / Timing Role: Acts as unidirectional level translator and noise-filtering buffer; clamped inputs reject ±1 kV fast transients per IEC 61000-4-4. Use Value: Maintains signal integrity across 2 m backplane runs with < 0.4 V VOL and > 3.7 V VOH at full load, eliminating need for discrete protection networks. |
| Legacy System Interface | Test Equipment Signal Routing |
|
Use Scenario: Interfacing modern FPGA-based test instrumentation with vintage 74LS-based logic analyzers and pattern generators. IC Role / Device Role / Timing Role: Bridges TTL output levels (0.8 V/2.0 V thresholds) to CMOS input requirements; 3-state allows bidirectional bus direction control. Use Value: Achieves drop-in compatibility without external pull-ups or level shifters, preserving original timing margins with 15 ns delay matching LS-family specs. |
Use Scenario: Multiplexing multiple DUT signals into a single high-speed oscilloscope channel using software-controlled routing. IC Role / Device Role / Timing Role: Provides four independent gated paths; enable pins driven by FPGA GPIO to select active signal source with sub-20 ns switching. Use Value: Delivers glitch-free signal routing with < 38 ns max disable time, preventing cross-talk between channels during reconfiguration. |
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 |
|---|---|---|---|
| SN74HCT125DR (TI) | Same logic function, SO14 package, but specified only to +85 °C (not +125 °C); ICC max = 200 μA vs. 160 μA. | Not suitable for under-hood automotive or high-temp industrial enclosures requiring full –40 °C to +125 °C operation. | Select if ambient temperature stays below 85 °C and TI supply chain preference applies. |
| 74VHC125M (ON Semiconductor) | CMOS-input variant (not TTL-compatible); VIH = 70% VCC; wider supply range (2–5.5 V); 10 ns typ propagation delay. | Requires external level translation when driving from 74LS sources; better for ultra-low-power 3.3 V systems. | Select only when interfacing exclusively with CMOS outputs and supply flexibility outweighs TTL compatibility needs. |
Compared with SN74HCT125DR and 74VHC125M, the 74HCT125D,652 uniquely combines guaranteed +125 °C operation, true TTL input thresholds, and industry-leading ESD robustness-making it the preferred choice for thermally demanding, mixed-logic industrial control designs.
Availability
74HCT125D,652 is available at Aetrix Electronics and suitable for microcontroller bus expansion, industrial I/O modules, legacy system interface, and test equipment signal routing requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for 74HCT125D,652 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 optimized for reliability and energy efficiency in industrial, automotive, and consumer applications.
The 74HCT125 belongs to Nexperia's high-reliability 74HCT logic family, engineered specifically for robust operation in harsh environments where wide temperature range, ESD resilience, and precise TTL-CMOS interfacing are mandatory.
FAQ
Can 74HCT125D,652 operate at 3.3 V?
No. The 74HCT125D,652 is TTL-input compatible and specified only for 4.5 V to 5.5 V operation. At 3.3 V, VIH minimum (2.0 V) falls outside recommended conditions, risking unreliable recognition of HIGH inputs. For 3.3 V systems, use 74LVC125 or 74AHC125 instead.
What is the maximum capacitive load per output?
The datasheet specifies dynamic characteristics up to 50 pF, and output drive capability remains within VOL/VOH limits up to 70 pF with CL = 50 pF test condition. For reliable 15 ns timing, keep total load (trace + IC input + probe) ≤ 40 pF; beyond that, propagation delay increases linearly with capacitance.
How does the input clamp diode affect design?
Each input has integrated clamp diodes to VCC and GND. When interfacing to voltages > VCC (e.g., 12 V sensors), a series current-limiting resistor must be used to restrict IIK to ≤ ±20 mA. For 12 V signals, a 390 Ω resistor limits current to ~14 mA at VCC = 5 V, satisfying absolute maximum ratings.
Is thermal pad required for SO14 package?
No. The SO14 (SOT108-1) package has no exposed thermal pad. Thermal performance relies on copper pour under the package and adequate trace width to GND/VCC planes. For continuous operation above 85 °C ambient, use ≥ 250 mm² of 2-oz copper connected to Pin 7 (GND) and Pin 14 (VCC) to maintain junction temperature below 125 °C.
74HCT125D,652 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Nexperia USA Inc.
- Series:
- 74HCT
- Package/Case:
- 14-SOIC (0.154", 3.90mm Width)
- Packaging:
- Tube
- Product Status:
- Obsolete
- 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,652 FAQ
1.How can I place an order for 74HCT125D,652 through Aetrix?
Please submit a Request for Quotation (RFQ) for 74HCT125D,652 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,652 reliable?
The price and inventory of 74HCT125D,652 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 74HCT125D,652 is usually 5 days.
3.What payment methods are accepted for 74HCT125D,652?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 74HCT125D,652 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 74HCT125D,652?
74HCT125D,652 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 74HCT125D,652 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,652?
For technical support, including 74HCT125D,652 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 74HCT125D,652 requirements.
6.How does Aetrix verify that 74HCT125D,652 is sourced from the original manufacturer or authorized distributors?
All 74HCT125D,652 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,652 meets industry standards.
7.What is the process for return or replacement of 74HCT125D,652?
All 74HCT125D,652 units undergo pre-shipment inspection (PSI). If there is an issue with 74HCT125D,652, 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,652 part is unused and in its original packaging.
Return procedure for 74HCT125D,652:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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