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onsemi MC74VHCT125AMEL
- Part No.:
- MC74VHCT125AMEL
- Manufacturer:
- onsemi
- Package:
- 14-SOIC (0.209", 5.30mm Width)
- Datasheet:
-
MC74VHCT125AMEL.pdf
- Description:
- IC BUF NON-INVERT 5.5V SOEIAJ-14
- Quantity:
- Payment:
- Shipping:
Inventory:4,150
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Product details
Overview
MC74VHCT125AMEL from onsemi is a quad 3-state bus buffer IC with TTL-compatible inputs and 5.0 V CMOS output swing, designed for level translation between 3.3 V and 5.0 V systems. It features 3.8 ns typical propagation delay at VCC = 5.0 V, operates across 2.0–5.5 V supply range, and provides input tolerance up to 7.0 V - enabling robust interfacing in mixed-voltage digital buses.
For engineers reviewing the MC74VHCT125AMEL datasheet, pinout, applications, or equivalent options, key selection criteria include its 3-state control architecture, ±8 mA output drive capability, high-noise-immunity internal buffering, and automotive-grade AEC-Q100 qualification (via NLV variants) - all critical for industrial bus isolation and voltage-level bridging.
Technical Context
The MC74VHCT125AMEL implements four independent non-inverting buffers, each with an active-low 3-state enable (OE). Its three-stage internal circuit includes input protection diodes, a TTL-level compatible input stage, and a buffered CMOS output stage delivering full rail-to-rail swing.
Input structures tolerate 0–7.0 V regardless of VCC, and outputs remain protected even when VCC = 0 V - supporting hot-insertion, battery-backup scenarios, and supply sequencing mismatches without latch-up (exceeding 300 mA) or ESD damage (HBM > 2000 V).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Propagation Delay (tPD) | 3.8 ns (typ) at VCC = 5.0 V, CL = 15 pF - enables high-speed data transfer in 25 MHz+ bus applications. |
| Supply Voltage Range | 2.0 V to 5.5 V - supports operation across 3.3 V and 5.0 V logic domains with single-supply simplicity. |
| Input Voltage Tolerance | −0.5 V to +7.0 V - allows safe interfacing of 5.0 V signals into 3.3 V systems without external clamping. |
| Output Drive Strength | ±8.0 mA at VCC = 4.5 V - sufficient to drive standard TTL loads and 50 pF capacitive buses. |
| 3-State Leakage (IOZ) | 2.5 µA max at TA ≤ 125°C - ensures minimal signal coupling during bus contention or power-down states. |
| Power Dissipation (ICC) | 4.0 µA max quiescent current at TA = 25°C - delivers CMOS efficiency while matching bipolar TTL speed. |
| ESD Rating (HBM) | >2000 V - meets industrial handling requirements without additional board-level protection. |
Pinout & Package
TSSOP-14 package (Case 948G), 4.4 mm × 5.0 mm body, 0.65 mm pitch, lead-free (Pb-free) and RoHS compliant.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 4, 10, 13 | Input A1–A4 | Non-inverting data inputs; TTL-compatible (VIH = 2.0 V, VIL = 0.8 V) and 7.0 V tolerant. |
| 2, 5, 9, 12 | Enable OE1–OE4 | Active-low 3-state controls; high = high-impedance output, low = enabled buffer pass-through. |
| 3, 6, 8, 11 | Output Y1–Y4 | CMOS-compatible outputs with full 0–VCC swing; capable of sourcing/sinking 8 mA. |
| 7 | GND | Ground reference for all logic and I/O; required for ESD protection path and noise immunity. |
| 14 | VCC | Primary supply pin; powers internal logic and output drivers; supports 2.0–5.5 V operation. |
Key Features
| Feature | Design Value |
|---|---|
| High-speed / low-power balance | 3.8 ns tPD with only 4.0 µA ICC - achieves TTL-equivalent timing without bipolar power penalty. |
| Wide supply and input voltage range | Operates from 2.0–5.5 V supply while accepting −0.5–7.0 V inputs - eliminates level-shifters in mixed-voltage designs. |
| Hot-insertion and power-sequence resilience | VCC = 0 V output protection + input overvoltage tolerance - prevents damage during live backplane insertion or brownout recovery. |
| Robust noise immunity | VOLP ≤ 0.8 V (max) and balanced tPLH/tPHL - reduces false triggering in noisy industrial environments. |
| AEC-Q100 qualified variant available | NLVVHCT125ADTRG offers PPAP-capable automotive qualification - suitable for under-hood communication interfaces. |
Applications
| Industrial PLC Backplane Interface | Automotive Body Control Module Bus Isolation |
|---|---|
Use Scenario: Isolating legacy 5 V sensor data lines from a modern 3.3 V microcontroller-based PLC CPU module. IC Role / Device Role / Timing Role: Quad buffer provides direction-controlled, 3-state-enabled signal routing between voltage domains with precise timing alignment. Use Value: Eliminates need for discrete level shifters while maintaining <10 ns inter-channel skew and surviving 125°C ambient operation. |
Use Scenario: Enabling/disabling CAN transceiver power domains and diagnostic lines in a multi-node body control unit. IC Role / Device Role / Timing Role: Acts as programmable bus gate for diagnostic communication lines, synchronized to MCU GPIOs via OE pins. Use Value: Supports fail-safe bus shutdown during fault conditions and meets AEC-Q100 thermal and ESD requirements. |
| Medical Equipment Data Acquisition Front-End | Test & Measurement Instrument Digital I/O Expansion |
Use Scenario: Buffering analog-to-digital converter parallel output lines before transmission to a FPGA-based processing engine. IC Role / Device Role / Timing Role: Provides clean, low-skew, 3-state-controllable interface between ADC and FPGA, minimizing metastability risk. Use Value: Delivers sub-4 ns propagation delay and <2 ns output-to-output skew - critical for synchronous sampling integrity. |
Use Scenario: Expanding digital I/O count on a benchtop oscilloscope's front-panel control bus with minimal layout impact. IC Role / Device Role / Timing Role: Serves as bidirectional bus repeater with per-channel enable, allowing dynamic reconfiguration of test signal paths. Use Value: Enables hot-swappable module detection via controlled 3-state release and supports 50 pF load drive without signal degradation. |
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 |
|---|---|---|---|
| SN74LVC125APWR | Lower VCC range (1.65–3.6 V); 3.3 V only; no 5 V tolerance on inputs/outputs. | Suitable only for pure 3.3 V systems; cannot replace MC74VHCT125AMEL in 5 V-tolerant or mixed-voltage roles. | Select when cost and footprint are prioritized over voltage flexibility and industrial ruggedness. |
| 74AHCT125PW,118 | Same 2.0–5.5 V range and 5 V-tolerant inputs; slightly higher tPD (4.2 ns typ) and lower ESD rating (HBM = 2000 V same, but MM = 200 V vs 200 V). | Functionally interchangeable in most 5 V bus applications; lacks AEC-Q100 automotive variant. | Choose for pin-compatible drop-in replacement where onsemi-specific qualification is not required. |
Compared with SN74LVC125APWR and 74AHCT125PW,118, the MC74VHCT125AMEL uniquely combines 7.0 V input tolerance, AEC-Q100-qualified automotive variants, and superior hot-insertion resilience - making it the preferred choice for industrial backplanes and automotive body electronics requiring long-term reliability under voltage mismatch stress.
Availability
MC74VHCT125AMEL is available at Aetrix Electronics and suitable for industrial PLC backplanes, automotive body control modules, medical data acquisition systems, and test equipment I/O expansion requiring stable component supply and long-lifecycle support.
Supply support for MC74VHCT125AMEL 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
onsemi (formerly ON Semiconductor) is a global semiconductor supplier specializing in energy-efficient silicon solutions for automotive, industrial, cloud, and medical applications.
The VHCT logic family - including MC74VHCT125AMEL - was engineered to deliver TTL-speed performance with CMOS power efficiency and enhanced ruggedness for mission-critical industrial and automotive interfaces.
FAQ
What is the maximum input voltage the MC74VHCT125AMEL can safely accept?
The MC74VHCT125AMEL accepts DC input voltages from −0.5 V to +7.0 V regardless of supply voltage - enabling direct connection of 5.0 V signals into 3.3 V systems without external clamping. This specification is guaranteed across the full operating temperature range (−55°C to +125°C) and is validated by onsemi's input protection structure design.
Does the MC74VHCT125AMEL support true 5 V operation with TTL-compatible inputs?
Yes, the MC74VHCT125AMEL fully supports 5.0 V operation with TTL-compatible input thresholds (VIH = 2.0 V, VIL = 0.8 V) and delivers full 5.0 V CMOS output swings. Its VHCT input structure ensures reliable recognition of standard TTL logic levels while maintaining compatibility with 3.3 V microcontrollers driving its inputs.
Can the MC74VHCT125AMEL be used in automotive applications?
While the MC74VHCT125AMEL itself is not AEC-Q100 qualified, its pin- and function-compatible variant NLVVHCT125ADTRG is AEC-Q100 qualified and PPAP capable. That automotive-grade part shares identical electrical specifications, TSSOP-14 packaging, and thermal performance - making it the designated solution for under-hood and body-control applications.
What is the 3-state enable logic polarity for the MC74VHCT125AMEL?
The MC74VHCT125AMEL uses active-low 3-state enable inputs (OE1–OE4). When OE is logic high, the corresponding Y output enters high-impedance state; when OE is logic low, the buffer passes the A input to Y. This matches standard industry convention for quad bus buffers and simplifies control logic design using common GPIO configurations.
How does the MC74VHCT125AMEL handle power-down scenarios where VCC = 0 V?
The MC74VHCT125AMEL features output structures that remain protected even when VCC = 0 V - preventing latch-up or damage during hot insertion or partial power-down. Inputs also retain protection across the full −0.5 V to +7.0 V range, ensuring safe operation during supply sequencing mismatches or battery-backup transitions without external circuitry.
MC74VHCT125AMEL Specifications
- Product attributes
- Attribute value
- Manufacturer:
- onsemi
- Series:
- 74VHCT
- Package/Case:
- 14-SOIC (0.209", 5.30mm Width)
- Packaging:
- Tape & Reel (TR)
- 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:
- 8mA, 8mA
- Voltage - Supply:
- 2V ~ 5.5V
- Operating Temperature:
- -55°C ~ 125°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOEIAJ-14
MC74VHCT125AMEL FAQ
1.How can I place an order for MC74VHCT125AMEL through Aetrix?
Please submit a Request for Quotation (RFQ) for MC74VHCT125AMEL 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 MC74VHCT125AMEL reliable?
The price and inventory of MC74VHCT125AMEL are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MC74VHCT125AMEL is usually 5 days.
3.What payment methods are accepted for MC74VHCT125AMEL?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MC74VHCT125AMEL transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MC74VHCT125AMEL?
MC74VHCT125AMEL orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MC74VHCT125AMEL 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 MC74VHCT125AMEL?
For technical support, including MC74VHCT125AMEL datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MC74VHCT125AMEL requirements.
6.How does Aetrix verify that MC74VHCT125AMEL is sourced from the original manufacturer or authorized distributors?
All MC74VHCT125AMEL 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 MC74VHCT125AMEL meets industry standards.
7.What is the process for return or replacement of MC74VHCT125AMEL?
All MC74VHCT125AMEL units undergo pre-shipment inspection (PSI). If there is an issue with MC74VHCT125AMEL, 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 MC74VHCT125AMEL part is unused and in its original packaging.
Return procedure for MC74VHCT125AMEL:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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