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onsemi MC74VHCT125AMELG
- Part No.:
- MC74VHCT125AMELG
- Manufacturer:
- onsemi
- Package:
- 14-SOIC (0.209", 5.30mm Width)
- Datasheet:
-
MC74VHCT125AMELG.pdf
- Description:
- IC BUF NON-INVERT 5.5V SOEIAJ-14
- Quantity:
- Payment:
- Shipping:
Inventory:1,245
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Product details
Overview
MC74VHCT125AMELG from onsemi is a high-speed CMOS quad bus buffer with 3-state control inputs, fabricated using silicon gate CMOS technology. It delivers TTL-compatible input thresholds (VIL = 0.8 V, VIH = 2.0 V), 5.0 V CMOS-level output swings, and operates across 2.0–5.5 V supply range-enabling reliable 3.3 V to 5.0 V level translation in digital interface circuits.
For engineers reviewing the MC74VHCT125AMELG datasheet, pinout, applications, or equivalent options, key selection criteria include propagation delay (3.8 ns typ at VCC = 5.0 V), 3-state enable timing (tPZL = 3.6 ns typ), input overvoltage tolerance (up to 7.0 V), and guaranteed 5.5 V absolute maximum ratings for robust hot-insertion and mixed-voltage system design.
Technical Context
The MC74VHCT125AMELG implements four independent non-inverting buffers, each with active-low 3-state control (OE). Its three-stage internal architecture includes input protection diodes, TTL-compatible input structures, and a buffered output stage delivering high noise immunity and stable switching behavior.
Input voltage tolerance extends to 7.0 V regardless of VCC, and outputs remain protected even when VCC = 0 V-supporting battery backup, hot-swap, and supply sequencing scenarios. The device achieves balanced tPLH/tPHL propagation delays and low output ground bounce (VOLP ≤ 0.8 V).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage Range | 2.0 V to 5.5 V - supports dual-rail systems and brown-out tolerant operation |
| Propagation Delay (tPD) | 3.8 ns (typ) at VCC = 5.0 V, CL = 15 pF - enables high-speed bus buffering up to ~100 MHz clock domains |
| Input Thresholds | VIL = 0.8 V, VIH = 2.0 V - ensures reliable interfacing with legacy TTL and 3.3 V logic families |
| Output Drive | ±8 mA at VCC = 4.5 V - sufficient for driving standard CMOS loads and short PCB traces |
| Input Overvoltage Tolerance | Up to 7.0 V - allows safe connection to 5 V signals even when powered from 3.3 V or lower |
| 3-State Leakage (IOZ) | ≤ 2.5 µA max at TA ≤ 125°C - minimizes bus contention current in high-impedance state |
| ESD Rating | HBM > 2000 V, MM > 200 V - meets industrial handling requirements without additional protection circuitry |
Pinout & Package
TSSOP-14 package (Case 948G), lead-free, RoHS compliant, 4.4 mm × 5.0 mm footprint with 0.65 mm pitch.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 4, 10, 13 | Input A1–A4 | Non-inverting data inputs; tolerate up to 7.0 V independent of VCC |
| 2, 5, 9, 12 | 3-State Control OE1–OE4 | Active-low enables; OE = HIGH forces output into high-impedance state |
| 3, 6, 8, 11 | Output Y1–Y4 | CMOS-compatible buffered outputs with full 5.0 V swing and 0.52 V VOL at 8 mA |
| 7 | GND | Ground reference for all I/O and internal circuitry |
| 14 | VCC | Primary power supply (2.0–5.5 V); powers internal logic and output drivers |
Key Features
| Feature | Design Value |
|---|---|
| High-speed bus buffering | 3.8 ns typical propagation delay at 5.0 V enables use in 100+ MHz synchronous data paths |
| TTL-compatible inputs | VIL = 0.8 V / VIH = 2.0 V allows direct connection to 5 V TTL, LVTTL, and mixed-voltage microcontrollers |
| Level-shifting capability | Accepts 3.3 V inputs while delivering full 5.0 V CMOS outputs - eliminates need for external translators |
| Supply-independent input protection | Inputs withstand 0–7.0 V regardless of VCC value - prevents latch-up during power sequencing or hot insertion |
| Zero-VCC output protection | Outputs remain undamaged even when VCC = 0 V - critical for battery-backed or partial-power-down systems |
Applications
| Industrial PLC Backplane Interface | Automotive Body Control Module |
|---|---|
Use Scenario: Isolating and buffering address/data lines between 3.3 V MCU and 5 V peripheral ASIC on a modular I/O rack backplane. IC Role / Device Role / Timing Role: Quad non-inverting buffer with independent 3-state controls manages bidirectional bus arbitration and signal integrity across voltage domains. Use Value: Eliminates external level shifters; 3.8 ns tPD ensures timing compliance with 25 MHz backplane clocks; 7.0 V input tolerance prevents damage during hot-plug events. | Use Scenario: Interfacing a 3.3 V automotive microcontroller to legacy 5 V sensor clusters and actuator drivers in body electronics. IC Role / Device Role / Timing Role: Voltage-tolerant bus buffer translates logic levels while maintaining ESD robustness and AEC-Q100-compliant reliability. Use Value: Supports extended temperature operation (−55°C to +125°C); HBM > 2000 V rating reduces field failure risk; Pb-free TSSOP-14 fits compact under-hood layouts. |
| Medical Diagnostic Equipment Data Bus | Test & Measurement Instrumentation |
Use Scenario: Buffering high-speed configuration and status signals between FPGA-based control logic and analog front-end modules operating at different supply rails. IC Role / Device Role / Timing Role: Low-noise, low-skew quad buffer isolates sensitive analog sections from digital switching noise while enabling precise timing alignment. Use Value: VOLP ≤ 0.8 V and tOSLH ≤ 1.0 ns minimize ground bounce and inter-channel skew - preserving signal fidelity in sub-ns timing-critical paths. | Use Scenario: Driving multiple DUT (device-under-test) inputs simultaneously from a single pattern generator channel in automated test equipment. IC Role / Device Role / Timing Role: Parallel 3-state buffer provides synchronized fanout with independent enable control per channel for flexible signal routing. Use Value: 8 mA drive strength supports 10+ CMOS loads; 2.0–5.5 V operation accommodates diverse DUT supply requirements; TSSOP-14 simplifies automated PCB assembly. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar quad bus buffer applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SN74LVC125APWR | Lower VCC range (1.65–3.6 V); no 5 V tolerance; 3.5 ns tPD at 3.3 V | Optimized for 3.3 V-only systems; unsuitable for 5 V interfacing or mixed-supply designs | Select when only 3.3 V operation is required and cost/size optimization is prioritized over voltage flexibility |
| 74AHCT125PW,118 | Same 2.0–5.5 V range and TTL-compatible inputs; slightly higher ICC (8 µA vs 4 µA max); identical pinout | Drop-in replacement with identical function and package; minor quiescent current difference | Choose for second-source availability where identical electrical behavior and layout compatibility are mandatory |
Compared with SN74LVC125APWR and 74AHCT125PW,118, the MC74VHCT125AMELG uniquely combines 7.0 V input overvoltage tolerance, zero-VCC output protection, and AEC-Q100 qualification-making it the preferred choice for automotive, industrial, and mixed-voltage systems requiring robustness beyond basic logic translation.
Availability
MC74VHCT125AMELG is available at Aetrix Electronics and suitable for industrial PLC backplanes, automotive body control modules, medical diagnostic data buses, and test instrumentation requiring stable component supply across extended temperature and mixed-voltage environments.
Supply support for MC74VHCT125AMELG 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 manufacturer specializing in energy-efficient power management, analog, logic, and sensing solutions for automotive, industrial, and cloud infrastructure markets.
The VHCT logic family-including MC74VHCT125AMELG-is engineered for high-speed, low-power, mixed-voltage digital interfacing with enhanced robustness for harsh environments and demanding power sequencing requirements.
FAQ
What is the maximum input voltage the MC74VHCT125AMELG can tolerate?
The MC74VHCT125AMELG supports DC input voltages from −0.5 V to +7.0 V, regardless of the VCC supply level. This overvoltage tolerance enables safe interfacing with 5 V signals even when the device is powered from 3.3 V or lower, and protects against damage during hot insertion or supply sequencing mismatches. The MC74VHCT125AMELG maintains this rating across its full operating temperature range (−55°C to +125°C).
Does the MC74VHCT125AMELG support 3.3 V to 5 V level translation?
Yes, the MC74VHCT125AMELG is explicitly designed for bidirectional level translation between 3.3 V and 5.0 V systems. Its TTL-compatible inputs accept 3.3 V logic levels as valid high/low signals, while its CMOS output stage delivers full 5.0 V rail-to-rail swings. This eliminates the need for external translators in mixed-voltage digital interfaces, and the MC74VHCT125AMELG maintains timing performance (3.8 ns tPD) and noise immunity (VOLP ≤ 0.8 V) throughout.
Is the MC74VHCT125AMELG pin-compatible with other logic families?
Yes, the MC74VHCT125AMELG is pin- and function-compatible with industry-standard quad bus buffers including the 74HC125, 74HCT125, and 74AHCT125 families in TSSOP-14 packaging. Its pinout matches the JEDEC MS-012 standard: inputs (A1–A4) and 3-state controls (OE1–OE4) occupy alternating positions, with outputs (Y1–Y4), VCC, and GND placed per standard layout. This allows drop-in replacement in existing designs without PCB modification.
What is the operating temperature range for the MC74VHCT125AMELG?
The MC74VHCT125AMELG is rated for operation from −55°C to +125°C, meeting industrial and automotive-grade environmental requirements. This extended range is validated across all electrical parameters-including propagation delay, output drive, and 3-state leakage-and supports deployment in under-hood automotive modules, factory-floor PLCs, and outdoor medical equipment. The MC74VHCT125AMELG's thermal derating (−6.1 mW/°C above 65°C for TSSOP) ensures reliable power dissipation management.
How does the MC74VHCT125AMELG handle power-down conditions?
The MC74VHCT125AMELG features built-in power-down protection: inputs remain functional and undamaged even when VCC = 0 V, and outputs are safeguarded against reverse current flow during partial power loss. Its input structures tolerate 0–7.0 V regardless of supply state, preventing latch-up during battery backup transitions or hot-swap events. This behavior is intrinsic to the MC74VHCT125AMELG's silicon gate CMOS process and requires no external circuitry.
MC74VHCT125AMELG 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
MC74VHCT125AMELG FAQ
1.How can I place an order for MC74VHCT125AMELG through Aetrix?
Please submit a Request for Quotation (RFQ) for MC74VHCT125AMELG 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 MC74VHCT125AMELG reliable?
The price and inventory of MC74VHCT125AMELG are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MC74VHCT125AMELG is usually 5 days.
3.What payment methods are accepted for MC74VHCT125AMELG?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MC74VHCT125AMELG transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MC74VHCT125AMELG?
MC74VHCT125AMELG orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MC74VHCT125AMELG 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 MC74VHCT125AMELG?
For technical support, including MC74VHCT125AMELG datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MC74VHCT125AMELG requirements.
6.How does Aetrix verify that MC74VHCT125AMELG is sourced from the original manufacturer or authorized distributors?
All MC74VHCT125AMELG 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 MC74VHCT125AMELG meets industry standards.
7.What is the process for return or replacement of MC74VHCT125AMELG?
All MC74VHCT125AMELG units undergo pre-shipment inspection (PSI). If there is an issue with MC74VHCT125AMELG, 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 MC74VHCT125AMELG part is unused and in its original packaging.
Return procedure for MC74VHCT125AMELG:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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