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onsemi MC74VHCT125ADTRG
- Part No.:
- MC74VHCT125ADTRG
- Manufacturer:
- onsemi
- Package:
- 14-TSSOP (0.173", 4.40mm Width)
- Datasheet:
-
MC74VHCT125ADTRG.pdf
- Description:
- IC BUF NON-INVERT 5.5V 14TSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:4,048
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Product details
Overview
MC74VHCT125ADTRG 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, ±8 mA output drive capability, and operates across 2.0 V to 5.5 V supply range. Used in bidirectional data bus isolation and voltage-level interfacing in industrial control and embedded communication subsystems.
For engineers reviewing the MC74VHCT125ADTRG datasheet, pinout, applications, or equivalent options, key selection criteria include 3-state timing (tPZL/tPLZ), input tolerance up to 7.0 V, 3.3/5.0 V interoperability, and TSSOP-14 package compatibility with board space-constrained designs.
Technical Context
The MC74VHCT125ADTRG implements four independent non-inverting buffers, each with active-low 3-state enable (OE) control. Its silicon gate CMOS architecture delivers TTL-speed performance while maintaining CMOS power efficiency - ICC ≤ 4.0 µA max at TA = 25°C under static conditions.
Input structures tolerate voltages from −0.5 V to +7.0 V regardless of VCC, enabling hot-insertion and battery-backup resilience. Output stages remain protected even when VCC = 0 V, and internal three-stage buffering ensures high noise immunity and balanced tPLH/tPHL propagation delays.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Propagation Delay | 3.8 ns typical (VCC = 5.0 V, CL = 15 pF), enabling high-speed bus handshaking up to ~100 MHz system clock domains. |
| Supply Voltage Range | 2.0 V to 5.5 V - supports mixed-voltage system integration including 3.3 V logic interfacing to legacy 5 V buses. |
| Output Drive | ±8.0 mA (IOL/IOH) at VCC = 4.5 V - sufficient to drive standard TTL loads and 50 pF transmission lines without external buffering. |
| Input Voltage Tolerance | −0.5 V to +7.0 V - allows safe interface to 5 V systems while powered from 3.3 V, eliminating need for external clamping diodes. |
| 3-State Leakage | ≤ 2.5 µA (IOZ) at TA ≤ 125°C - ensures minimal bus contention current during high-impedance state in multi-driver configurations. |
| Power Dissipation | ICC ≤ 40 µA max at TA ≤ 125°C - enables low-quiescent-power operation in always-on industrial monitoring nodes. |
| ESD Robustness | HBM > 2000 V, MM > 200 V - meets industrial IEC 61000-4-2 Level 2 requirements without additional protection circuitry. |
Pinout & Package
TSSOP-14 (DT suffix, Case 948G), 4.4 mm × 5.0 mm body, 0.65 mm pitch, lead-free and RoHS compliant.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 4, 10, 13 | Input A1–A4 | Non-inverting data inputs; accept TTL-logic thresholds (VIH = 2.0 V min) and tolerate up to 7.0 V. |
| 2, 5, 9, 12 | Enable OE1–OE4 | Active-low 3-state controls; must be HIGH to disable output (Z-state); compatible with 3.3 V or 5 V logic drivers. |
| 3, 6, 8, 11 | Output Y1–Y4 | Buffered non-inverting outputs; full rail-to-rail swing (VOL ≤ 0.52 V, VOH ≥ 2.34 V at 8 mA load). |
| 7 | GND | Ground reference for all inputs, outputs, and internal circuitry; requires low-impedance PCB connection. |
| 14 | VCC | Positive supply pin; supports 2.0–5.5 V operation; decoupling capacitor (0.1 µF) required within 5 mm. |
Key Features
| Feature | Design Value |
|---|---|
| 3.3 V ↔ 5.0 V level translation | Enables direct interconnection between modern low-voltage microcontrollers and legacy 5 V peripherals without external translators. |
| Hot-insertion tolerant I/O | Input/output structures remain protected when VCC = 0 V or when input exceeds VCC by up to 2.0 V - critical for modular backplane systems. |
| Low-noise output switching | VOLP ≤ 0.8 V (max) suppresses ground bounce and crosstalk in dense PCB layouts with multiple parallel buffers. |
| Pin- and function-compatible | Direct drop-in replacement for MC74HC125, 74VHC125, and 74ACT125 in TSSOP-14 footprint - simplifies second-source qualification. |
| Automotive-grade variant available | NLVVHCT125ADTRG version qualified to AEC-Q100 Grade 1 (−40°C to +125°C) with PPAP support for automotive body electronics. |
Applications
| Industrial PLC Backplane Interface | Embedded MCU Bus Isolation |
|---|---|
|
Use Scenario: Isolating 3.3 V ARM Cortex-M4 microcontroller address/data bus from 5 V legacy I/O modules in programmable logic controllers. IC Role / Device Role / Timing Role: Quad non-inverting buffer with per-channel 3-state control enables time-multiplexed access to shared 5 V peripheral bus without contention. Use Value: Eliminates need for discrete level-shifting transistors; 3.8 ns tPD ensures setup/hold timing compliance with 25 MHz bus clocks. |
Use Scenario: Segregating debug port signals (SWD/JTAG) from main application bus in safety-critical medical device controllers. IC Role / Device Role / Timing Role: Provides hardware-gated signal path where OE pins are controlled by system security monitor to disable debug access during runtime. Use Value: Prevents unauthorized firmware extraction via physical debug interface; 2.5 µA IOZ ensures zero leakage current in disabled state. |
| Automotive Body Control Module | Test Equipment Signal Conditioning |
|
Use Scenario: Driving 5 V CAN transceiver enable lines and LIN bus pull-ups from 3.3 V automotive microcontroller GPIOs. IC Role / Device Role / Timing Role: Level-translating buffer with 7.0 V input tolerance withstands load-dump transients (ISO 7637-2 Pulse 5a) without latch-up. Use Value: Replaces dual-supply translators; AEC-Q100 qualified NLV variant supports full automotive temperature range without derating. |
Use Scenario: Conditioning digital stimulus signals from FPGA-based pattern generators before injection into DUTs with mixed-voltage interfaces. IC Role / Device Role / Timing Role: Provides precise edge-controlled waveform shaping with matched tPLH/tPHL (≤1.0 ns skew) across all four channels. Use Value: Enables sub-nanosecond timing correlation between stimulus and response measurements; VOLP ≤ 0.8 V reduces false triggering in high-sensitivity receivers. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar quad bus buffer applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SN74LVC125APW | Lower VCC range (1.65–3.6 V), 3.3 V only; 3.7 ns tPD at 3.3 V; no 5 V tolerant inputs. | Restricted to pure 3.3 V systems; cannot replace MC74VHCT125ADTRG in 5 V bus interfacing roles. | Select when cost and 3.3 V-only operation are primary; avoid if 5 V interface or mixed-voltage robustness is required. |
| 74VHC125FT | Same pinout and function but rated only to 125°C (not −55°C); lacks 7.0 V input tolerance; no automotive qualification. | Suitable for commercial-grade industrial use but not for extended temperature or automotive environments. | Choose for cost-sensitive non-automotive applications where full military-grade input tolerance is unnecessary. |
Compared with SN74LVC125APW and 74VHC125FT, the MC74VHCT125ADTRG uniquely supports 2.0–5.5 V operation with 7.0 V input tolerance and −55°C to +125°C temperature range - making it the only option qualified for harsh-environment 3.3 V/5 V bridging in industrial and automotive control.
Availability
MC74VHCT125ADTRG is available at Aetrix Electronics and suitable for industrial PLC backplanes, embedded MCU bus isolation, automotive body control modules, and test equipment signal conditioning requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for MC74VHCT125ADTRG 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 focused on energy-efficient innovation for automotive, industrial, cloud, medical, and IoT applications.
The VHCT logic family, including MC74VHCT125ADTRG, was engineered specifically for seamless voltage-level interoperability between legacy 5 V TTL systems and modern low-voltage microcontrollers - emphasizing robustness, timing precision, and extended temperature reliability.
FAQ
What is the maximum input voltage rating for MC74VHCT125ADTRG?
The MC74VHCT125ADTRG supports DC input voltages from −0.5 V to +7.0 V, independent of VCC level. This allows safe interfacing of 5 V signals to a 3.3 V-powered MC74VHCT125ADTRG without external clamping, and protects against transient overvoltage events such as hot insertion or supply sequencing mismatches.
Does MC74VHCT125ADTRG support true 5 V TTL input compatibility?
Yes, MC74VHCT125ADTRG guarantees TTL-compatible input thresholds: VIH = 2.0 V minimum and VIL = 0.8 V maximum at VCC = 5.0 V. Its input structure accepts standard TTL logic levels directly, eliminating the need for external level-shifting resistors or buffers when connecting to legacy 5 V sources.
Can MC74VHCT125ADTRG operate with a 2.5 V supply?
Yes, MC74VHCT125ADTRG is fully specified from 2.0 V to 5.5 V. At VCC = 2.5 V, it maintains guaranteed logic thresholds (VIH = 1.2 V min, VIL = 0.53 V max) and delivers 4 mA output drive - suitable for low-power portable instrumentation where supply headroom is constrained.
What is the 3-state disable timing for MC74VHCT125ADTRG?
At VCC = 5.0 V and CL = 50 pF, the MC74VHCT125ADTRG exhibits tPLZ = 6.1 ns (max) and tPHZ = 6.1 ns (max) - the time from OE transition HIGH to output entering high-impedance state. This fast disable supports dynamic bus arbitration in real-time control networks with tight timing budgets.
Is MC74VHCT125ADTRG pin-compatible with other logic families?
Yes, MC74VHCT125ADTRG is pin- and function-compatible with industry-standard quad bus buffers including MC74HC125, 74VHC125, and 74ACT125 in TSSOP-14 packages. This enables drop-in replacement without PCB layout changes, simplifying design reuse and second-source qualification across logic families.
MC74VHCT125ADTRG Specifications
- Product attributes
- Attribute value
- Manufacturer:
- onsemi
- Series:
- 74VHCT
- Package/Case:
- 14-TSSOP (0.173", 4.40mm 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:
- 8mA, 8mA
- Voltage - Supply:
- 2V ~ 5.5V
- Operating Temperature:
- -55°C ~ 125°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 14-TSSOP
MC74VHCT125ADTRG FAQ
1.How can I place an order for MC74VHCT125ADTRG through Aetrix?
Please submit a Request for Quotation (RFQ) for MC74VHCT125ADTRG 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 MC74VHCT125ADTRG reliable?
The price and inventory of MC74VHCT125ADTRG are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MC74VHCT125ADTRG is usually 5 days.
3.What payment methods are accepted for MC74VHCT125ADTRG?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MC74VHCT125ADTRG transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MC74VHCT125ADTRG?
MC74VHCT125ADTRG orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MC74VHCT125ADTRG 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 MC74VHCT125ADTRG?
For technical support, including MC74VHCT125ADTRG datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MC74VHCT125ADTRG requirements.
6.How does Aetrix verify that MC74VHCT125ADTRG is sourced from the original manufacturer or authorized distributors?
All MC74VHCT125ADTRG 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 MC74VHCT125ADTRG meets industry standards.
7.What is the process for return or replacement of MC74VHCT125ADTRG?
All MC74VHCT125ADTRG units undergo pre-shipment inspection (PSI). If there is an issue with MC74VHCT125ADTRG, 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 MC74VHCT125ADTRG part is unused and in its original packaging.
Return procedure for MC74VHCT125ADTRG:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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