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onsemi MC74VHC1GT126MU3TCG
- Part No.:
- MC74VHC1GT126MU3TCG
- Manufacturer:
- onsemi
- Package:
- 6-UFDFN
- Datasheet:
-
MC74VHC1GT126MU3TCG.pdf
- Description:
- IC BUFFER NON-INVERT 5.5V 6UDFN
- Quantity:
- Payment:
- Shipping:
Inventory:3,304
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Product details
Overview
MC74VHC1GT126MU3TCG from onsemi is a single noninverting 3-state buffer with TTL-level input thresholds, designed for level-shifting between 2.0 V and 5.5 V logic domains. It delivers 3.5 ns typical propagation delay at 5 V, supports ±8 mA drive at 3.0 V, and features overvoltage-tolerant I/O up to 5.5 V - enabling safe interfacing of 5 V peripherals to 3 V microcontrollers in portable instrumentation.
For engineers reviewing the MC74VHC1GT126MU3TCG datasheet, pinout, applications, or equivalent options, key selection criteria include its UDFN6 (1.0 × 1.0 mm, 0.35 mm pitch) package, IOFF partial power-down protection, and guaranteed operation across −55 °C to +125 °C industrial temperature range.
Technical Context
The MC74VHC1GT126MU3TCG implements a three-stage CMOS architecture with buffered 3-state output, delivering high noise immunity and stable switching behavior. Its TTL-compatible input thresholds (VIH = 1.0 V min at 2.0 V VCC; VIL = 0.28 V max) ensure reliable recognition of legacy 5 V TTL signals even when powered from 3.3 V supplies.
Input and output structures are independently rated for overvoltage tolerance up to 5.5 V regardless of VCC, supporting hot-insertion and mixed-voltage system integration. The IOFF feature actively disables I/O leakage when VCC = 0 V, preventing back-powering of powered-down rails in partial-power-down systems.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCC Range | 2.0 V to 5.5 V - enables direct use in both 3.3 V and 5 V systems without level translators. |
| tPD (typ) | 3.5 ns at 5 V, CL = 15 pF - ensures minimal signal delay in high-speed control paths like SPI bus buffering. |
| IOH/IOL | ±8 mA at 3.0 V - sufficient to drive multiple CMOS inputs or small LED indicators without external buffers. |
| VIH/VIL | TTL thresholds: VIH ≥ 1.0 V (2.0 V VCC), VIL ≤ 0.28 V (2.0 V VCC) - guarantees compatibility with standard 5 V TTL outputs. |
| Overvoltage Tolerance | Inputs/outputs withstand up to 5.5 V independent of VCC - eliminates need for external clamping diodes in mixed-supply interfaces. |
| IOFF Leakage | ≤10 µA at VCC = 0 V - prevents unintended current flow during system sleep or rail sequencing. |
| Operating Temp | −55 °C to +125 °C - qualified for under-hood automotive, industrial PLC, and outdoor embedded applications. |
Pinout & Package
MC74VHC1GT126MU3TCG uses the UDFN6 (1.0 × 1.0 mm, 0.35 mm pitch) package with exposed thermal pad and no lead finish restrictions per JEDEC J-STD-020. Pin 1 is marked by a corner chamfer and located at top-left when the marking side faces up and the chamfer is oriented top-right (rotated 180° CW per ordering info).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (OE) | Output Enable input | Active-high control: drives Y to high-impedance when low; enables buffer pass-through when high. |
| 2 (A) | Data input | Noninverting logic input with TTL thresholds - accepts 5 V signals while powered from 3.3 V. |
| 3 (GND) | Ground reference | Primary return path for all internal logic and I/O current; must be low-impedance for noise immunity. |
| 4 (Y) | Buffered output | 3-state noninverting output with overvoltage-tolerant structure; sinks or sources up to 8 mA. |
| 5 (NC) | No-connect terminal | Internally unconnected; must remain floating - not to be tied to GND, VCC, or other signals. |
| 6 (VCC) | Power supply | Single positive supply input (2.0–5.5 V); powers all logic stages and output drivers. |
Key Features
| Feature | Design Value |
|---|---|
| TTL-level input compatibility | VIH = 1.0 V min at 2.0 V VCC enables direct connection to legacy 5 V TTL outputs without pull-ups or translators. |
| IOFF partial power-down protection | Blocks >99% of I/O leakage when VCC = 0 V - critical for battery-backed subsystems and hot-swap interfaces. |
| Overvoltage-tolerant I/O | Withstands 5.5 V on A, Y, OE pins regardless of VCC value - eliminates external protection components in mixed-rail designs. |
| Ultra-small UDFN6 footprint | 1.0 × 1.0 mm body with 0.35 mm pitch - saves PCB area in space-constrained IoT sensors and wearables. |
| Wide temperature operation | Specified from −55 °C to +125 °C - supports deployment in automotive engine control units and industrial motor drives. |
Applications
| Industrial Sensor Interface | Automotive Body Control Module |
|---|---|
|
Use Scenario: Isolating 5 V analog sensor outputs from a 3.3 V ADC controller in a factory-floor vibration monitor. IC Role / Device Role / Timing Role: Noninverting 3-state buffer providing voltage-level translation and output enable control for multiplexed sensor readout. Use Value: Eliminates need for discrete level-shifters; IOFF prevents sensor bias leakage when ADC is powered down between samples. |
Use Scenario: Enabling/disabling CAN transceiver standby mode via microcontroller GPIO in a door module ECU. IC Role / Device Role / Timing Role: Logic buffer isolating MCU I/O from transceiver EN pin, with fast 3.5 ns tPD ensuring precise timing alignment. Use Value: Overvoltage tolerance protects against 12 V battery transients; −55 °C to +125 °C rating matches under-dash environmental requirements. |
| Portable Medical Device | Smart Energy Meter |
|
Use Scenario: Driving an LCD segment driver IC from a low-power 3 V ARM Cortex-M0+ MCU while retaining compatibility with legacy 5 V firmware. IC Role / Device Role / Timing Role: Voltage-translating buffer with active-high OE, allowing dynamic display segment enable/disable without software changes. Use Value: TTL input thresholds accept existing 5 V test patterns; UDFN6 package minimizes board space in handheld diagnostic tools. |
Use Scenario: Buffering pulse outputs from a 5 V metrology IC to a 3.3 V microcontroller in a DIN-rail mounted electricity meter. IC Role / Device Role / Timing Role: 3-state interface isolating metering SoC from host MCU, with OE synchronized to communication windows. Use Value: 5.5 V I/O tolerance withstands ESD events on long PCB traces; IOFF prevents backfeeding during MCU reset sequences. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar noninverting 3-state buffer applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SN74LVC1G126DBVR | CMOS-input thresholds (VIH = 1.7 V min at 3.3 V), slightly higher ICC (max 10 µA vs. 40 µA), same UDFN6-6 package. | Better suited for pure 3.3 V systems; lacks native 5 V TTL input compatibility. | Select when interfacing only to modern CMOS logic and lower quiescent current is prioritized over legacy signal support. |
| 74AUP1G126GW,125 | Lower VCC range (0.8–3.6 V), ultra-low ICC (max 0.5 µA), smaller XSON6 (0.8 × 0.8 mm) package. | Not rated for 5 V I/O or −55 °C operation; unsuitable for mixed-voltage or extended-temperature use. | Choose for battery-powered wearable devices where size and standby current dominate, and 5 V signal compatibility is unnecessary. |
Compared with SN74LVC1G126DBVR and 74AUP1G126GW,125, the MC74VHC1GT126MU3TCG uniquely combines TTL input compatibility, 5.5 V overvoltage tolerance, and industrial temperature range - making it the only option among the three qualified for robust 5 V-to-3.3 V bridging in harsh environments.
Availability
MC74VHC1GT126MU3TCG is available at Aetrix Electronics and suitable for industrial sensor interfaces, automotive body control modules, portable medical devices, and smart energy meters requiring stable component supply across extended temperature ranges and mixed-voltage operation.
Supply support for MC74VHC1GT126MU3TCG 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 is a global semiconductor supplier delivering energy-efficient, intelligent power and sensing solutions for automotive, industrial, cloud, medical, and IoT applications.
The MC74VHC1GT126MU3TCG belongs to onsemi's VHC logic family - engineered for low-power, high-speed interfacing in space-constrained and thermally demanding embedded systems.
FAQ
What is the input threshold type of MC74VHC1GT126MU3TCG?
The MC74VHC1GT126MU3TCG features TTL-level input thresholds: VIH is guaranteed ≥1.0 V at 2.0 V VCC and ≥2.0 V at 5.5 V VCC; VIL is guaranteed ≤0.28 V at 2.0 V VCC and ≤0.8 V at 5.5 V VCC. This allows reliable recognition of standard 5 V TTL signals even when the device is powered from a 3.3 V supply - a key differentiator from CMOS-threshold variants like MC74VHC1G126.
Does MC74VHC1GT126MU3TCG support partial power-down operation?
Yes, MC74VHC1GT126MU3TCG includes IOFF circuitry that actively disables input and output leakage paths when VCC = 0 V. Per datasheet testing, IOFF leakage is limited to ≤10 µA under this condition - preventing back-powering of powered-down system rails and enabling safe use in hot-swap or battery-backup configurations.
What is the maximum operating temperature for MC74VHC1GT126MU3TCG?
The MC74VHC1GT126MU3TCG is fully specified for operation from −55 °C to +125 °C ambient temperature. This extended industrial temperature range is validated per onsemi's qualification standards and makes the device suitable for under-hood automotive applications, industrial motor controls, and outdoor infrastructure equipment.
Which package does MC74VHC1GT126MU3TCG use, and what are its key mechanical dimensions?
MC74VHC1GT126MU3TCG uses the UDFN6 package (case 517BX) measuring 1.0 mm × 1.0 mm × 0.5 mm with 0.35 mm pin pitch. Pin 1 is identified by a top-left chamfer when the marking side faces up and the chamfer is rotated 180° clockwise - matching the orientation specified in the ordering information table on page 8 of the datasheet.
Can MC74VHC1GT126MU3TCG safely interface 5 V signals to a 3.3 V microcontroller?
Yes, MC74VHC1GT126MU3TCG is explicitly designed for this use case. Its inputs and outputs tolerate up to 5.5 V regardless of VCC value, and its TTL input thresholds ensure correct logic interpretation of 5 V signals when powered from 3.3 V. No external resistors or level translators are required - simplifying design and improving reliability in mixed-voltage systems.
MC74VHC1GT126MU3TCG Specifications
- Product attributes
- Attribute value
- Manufacturer:
- onsemi
- Series:
- 74VHC
- Package/Case:
- 6-UFDFN
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Logic Type:
- Buffer, Non-Inverting
- Number of Elements:
- 1
- 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:
- 6-UDFN (1x1)
MC74VHC1GT126MU3TCG FAQ
1.How can I place an order for MC74VHC1GT126MU3TCG through Aetrix?
Please submit a Request for Quotation (RFQ) for MC74VHC1GT126MU3TCG 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 MC74VHC1GT126MU3TCG reliable?
The price and inventory of MC74VHC1GT126MU3TCG are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MC74VHC1GT126MU3TCG is usually 5 days.
3.What payment methods are accepted for MC74VHC1GT126MU3TCG?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MC74VHC1GT126MU3TCG transactions.
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4.How is shipping managed for MC74VHC1GT126MU3TCG?
MC74VHC1GT126MU3TCG orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MC74VHC1GT126MU3TCG 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 MC74VHC1GT126MU3TCG?
For technical support, including MC74VHC1GT126MU3TCG datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MC74VHC1GT126MU3TCG requirements.
6.How does Aetrix verify that MC74VHC1GT126MU3TCG is sourced from the original manufacturer or authorized distributors?
All MC74VHC1GT126MU3TCG 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 MC74VHC1GT126MU3TCG meets industry standards.
7.What is the process for return or replacement of MC74VHC1GT126MU3TCG?
All MC74VHC1GT126MU3TCG units undergo pre-shipment inspection (PSI). If there is an issue with MC74VHC1GT126MU3TCG, 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 MC74VHC1GT126MU3TCG part is unused and in its original packaging.
Return procedure for MC74VHC1GT126MU3TCG:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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