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onsemi MC74VHC1GT126MU2TCG
- Part No.:
- MC74VHC1GT126MU2TCG
- Manufacturer:
- onsemi
- Package:
- 6-UFDFN
- Datasheet:
-
MC74VHC1GT126MU2TCG.pdf
- Description:
- IC BUFFER NON-INVERT 5.5V 6UDFN
- Quantity:
- Payment:
- Shipping:
Inventory:4,117
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Product details
Overview
MC74VHC1GT126MU2TCG from onsemi is a single-channel noninverting 3-state buffer with TTL-level input thresholds, designed for level-shifting and bus isolation in mixed-voltage systems. It operates from 2.0 V to 5.5 V, delivers 3.5 ns propagation delay at 5 V (typ), supports ±8 mA output drive at 3.0 V, and features overvoltage-tolerant I/O up to 5.5 V - enabling reliable interfacing between 3 V and 5 V logic domains in portable instrumentation and industrial control modules.
For engineers reviewing the MC74VHC1GT126MU2TCG datasheet, pinout, applications, or equivalent options, key selection criteria include its TTL-compatible VIH/VIL thresholds (1.4 V/0.45 V at 3.0 V), IOFF partial power-down protection, UDFN6 1.2 × 1.0 mm package with 0.4 mm pitch, and guaranteed operation across −55 °C to +125 °C.
Technical Context
The MC74VHC1GT126MU2TCG implements a three-stage CMOS architecture with buffered 3-state output, delivering high noise immunity and stable switching. Its input structure tolerates voltages up to 5.5 V independent of VCC, allowing safe 5 V-to-3 V translation even when VCC = 3.0 V.
Output structures support VCC = 0 V operation and tolerate output voltages exceeding VCC, preventing latch-up or damage during hot insertion, battery backup transitions, or supply sequencing mismatches. The device includes IOFF circuitry that disables I/O leakage when VCC = 0 V, satisfying partial power-down requirements in multi-rail 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 shifters. |
| tPD (typ) | 3.5 ns at VCC = 5 V, CL = 15 pF - supports high-speed data routing in timing-critical digital interfaces. |
| VIH / VIL | 1.4 V / 0.45 V at VCC = 3.0 V - TTL-compatible thresholds ensure reliable recognition of legacy 5 V logic outputs driving 3 V inputs. |
| IOUT | ±8 mA at VCC = 3.0 V - sufficient drive strength for fan-out to multiple CMOS loads or resistive pull-ups. |
| IOFF Leakage | ≤10 µA at VCC = 0 V - prevents back-powering of powered-down rails during system sleep or reset states. |
| Operating Temp | −55 °C to +125 °C - qualified for under-hood automotive, industrial PLC, and aerospace-adjacent applications. |
| ESD Rating | HBM: 2000 V - provides robust handling margin during board assembly and field service. |
Pinout & Package
MC74VHC1GT126MU2TCG uses the UDFN6 (1.2 mm × 1.0 mm, 0.4 mm pitch) package with exposed pad. Pin 1 is marked by a dot or notch orientation per case 517AA; pin numbering follows standard UDFN convention with OE, A, GND, Y, NC, VCC.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (OE) | Output Enable | Active-high control: drives Y to high-impedance when low; enables noninverting pass-through when high. |
| 2 (A) | Data Input | TTL-threshold input accepting 0–5.5 V signals regardless of VCC; immune to supply voltage mismatch. |
| 3 (GND) | Ground Reference | Return path for all internal logic and output current; must be low-impedance for noise immunity. |
| 4 (Y) | Buffered Output | Noninverting 3-state output with overvoltage tolerance; sinks or sources up to 8 mA at 3 V. |
| 5 (NC) | No Connect | Internally unconnected terminal; must remain floating - no external connection permitted. |
| 6 (VCC) | Power Supply | Primary supply rail (2.0–5.5 V); powers internal logic and output stage; decoupling required within 2 mm. |
Key Features
| Feature | Design Value |
|---|---|
| TTL-Level Input Thresholds | VIH = 1.4 V, VIL = 0.45 V at 3.0 V - ensures compatibility with standard 5 V TTL outputs driving 3 V logic domains. |
| Overvoltage-Tolerant I/O | Inputs and outputs withstand up to 5.5 V regardless of VCC - eliminates need for external clamping diodes in mixed-supply systems. |
| IOFF Partial Power-Down Protection | Input/output leakage ≤10 µA when VCC = 0 V - prevents current backflow into powered-down sections during standby or fault conditions. |
| Wide Temperature Range | Specified from −55 °C to +125 °C - supports deployment in automotive engine compartments and industrial motor drives. |
| Ultra-Small UDFN6 Package | 1.2 mm × 1.0 mm footprint, 0.4 mm pitch - saves PCB area in space-constrained IoT sensors and wearable electronics. |
Applications
| Industrial Sensor Interface | Automotive Body Control Module |
|---|---|
Use Scenario: Interfacing 5 V analog sensor outputs (e.g., pressure transducers) to a 3.3 V microcontroller ADC input while maintaining signal integrity during supply transients. IC Role / Device Role / Timing Role: Level-shifting 3-state buffer isolating sensor domain from MCU domain; enables software-controlled signal gating via OE. Use Value: Eliminates external voltage translators and reduces BOM count; overvoltage tolerance prevents damage during 12 V battery load-dump events. | Use Scenario: Isolating LIN bus wake-up signals between 12 V-powered gateway and 5 V body controller ICs during deep-sleep mode. IC Role / Device Role / Timing Role: Bidirectional signal conditioner with IOFF - blocks leakage paths when VCC is removed from subsystem during sleep. Use Value: Reduces quiescent current below 10 µA during vehicle off-state, meeting ISO 16750-2 parasitic drain requirements. |
| Portable Medical Instrumentation | Programmable Logic Controller I/O Expansion |
Use Scenario: Buffering UART TX/RX lines between a 5 V USB-UART bridge and a 3.3 V ARM Cortex-M4 host in handheld diagnostic devices. IC Role / Device Role / Timing Role: Noninverting 3-state repeater with sub-4 ns tPD - preserves signal edge rates and timing margins across voltage domains. Use Value: Enables full-speed 3 Mbps UART communication without timing skew or signal degradation. | Use Scenario: Driving isolated digital outputs from a 3.3 V FPGA to 5 V relay driver stages in modular PLC backplanes. IC Role / Device Role / Timing Role: Bus interface buffer with ±8 mA drive capability - directly sources relay coil pre-driver inputs without external transistors. Use Value: Reduces component count per I/O channel and improves system MTBF by eliminating discrete driver stages. |
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 = 2.1 V at 3.3 V); slightly higher ICC (max 10 µA vs. 40 µA for MC74VHC1GT126). | Better suited for pure 3.3 V systems where TTL compatibility is unnecessary; lacks same overvoltage tolerance (max VIN = VCC + 0.5 V). | Select SN74LVC1G126DBVR only when interfacing exclusively within 3.3 V domains and lower static power is critical. |
| 74AUP1G126GW,125 | Lower VCC range (0.8–3.6 V); 3.7 ns tPD at 3.3 V; IOFF compliant but no 5.5 V overvoltage rating. | Optimized for ultra-low-power battery-operated devices; not suitable for 5 V interface or industrial temperature ranges. | Choose 74AUP1G126GW,125 only for sub-3.6 V portable designs requiring < 1 µA ICC and minimal active power. |
Compared with SN74LVC1G126DBVR and 74AUP1G126GW,125, the MC74VHC1GT126MU2TCG uniquely combines TTL-level input compatibility, 5.5 V overvoltage tolerance, and −55 °C to +125 °C operation - making it the only viable option for ruggedized 3 V/5 V mixed-signal bridging in harsh environments.
Availability
MC74VHC1GT126MU2TCG is available at Aetrix Electronics and suitable for industrial sensor interface, automotive body control, portable medical instrumentation, and programmable logic controller I/O expansion requiring stable component supply across extended temperature and mixed-voltage conditions.
Supply support for MC74VHC1GT126MU2TCG 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 MC74VHC1GT126MU2TCG belongs to the VHC1G ultra-small logic family, engineered specifically for space-constrained, mixed-voltage digital interfacing where reliability across wide temperature and supply ranges is mandatory.
FAQ
What is the input threshold behavior of the MC74VHC1GT126MU2TCG?
The MC74VHC1GT126MU2TCG features TTL-level input thresholds: VIH = 1.4 V and VIL = 0.45 V at VCC = 3.0 V. This allows it to reliably recognize standard 5 V TTL logic levels when operating from a 3.3 V supply - a key distinction from CMOS-threshold variants like the MC74VHC1G126. These values are fully characterized across −55 °C to +125 °C per the official onsemi datasheet Rev. 27.
Does the MC74VHC1GT126MU2TCG support partial power-down operation?
Yes, the MC74VHC1GT126MU2TCG includes IOFF circuitry that limits input/output leakage current to ≤10 µA when VCC = 0 V. This feature prevents back-driving of powered-down rails and is explicitly verified in the DC Electrical Characteristics table for the MC74VHC1GT126 variant. It is essential for systems requiring controlled power sequencing or deep-sleep modes.
What is the maximum operating frequency supported by the MC74VHC1GT126MU2TCG?
The MC74VHC1GT126MU2TCG does not specify a maximum clock frequency; instead, its AC performance is defined by propagation delay (tPLH/tPHL = 3.5 ns typ at 5 V, CL = 15 pF) and output enable/disable times (tPZL/tPLZ = 4.8 ns typ at 5 V). These parameters support clean signal routing up to ~100 MHz in well-terminated, low-capacitance traces - validated by onsemi's switching waveform test setup in Figure 4 of the datasheet.
Is the MC74VHC1GT126MU2TCG RoHS compliant and lead-free?
Yes, the MC74VHC1GT126MU2TCG is Pb-free, halogen-free/BFR-free, and RoHS compliant as confirmed in the Features section of the onsemi datasheet (Rev. 27). The "G" suffix in the ordering code (e.g., MU2TCG) explicitly denotes lead-free packaging, and the device meets JEDEC J-STD-020 moisture sensitivity level 1 requirements.
Can the NC pin (Pin 5) on the MC74VHC1GT126MU2TCG be grounded or left floating?
Pin 5 of the MC74VHC1GT126MU2TCG is designated NC (No Connect) and must remain unconnected - neither grounded nor tied to any voltage. The datasheet's Pin Assignment table for UDFN packages confirms this terminal is internally unconnected. Connecting it may cause unpredictable behavior or violate internal ESD protection layout, compromising reliability.
MC74VHC1GT126MU2TCG 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)
MC74VHC1GT126MU2TCG FAQ
1.How can I place an order for MC74VHC1GT126MU2TCG through Aetrix?
Please submit a Request for Quotation (RFQ) for MC74VHC1GT126MU2TCG 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 MC74VHC1GT126MU2TCG reliable?
The price and inventory of MC74VHC1GT126MU2TCG are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MC74VHC1GT126MU2TCG is usually 5 days.
3.What payment methods are accepted for MC74VHC1GT126MU2TCG?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MC74VHC1GT126MU2TCG transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MC74VHC1GT126MU2TCG?
MC74VHC1GT126MU2TCG orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MC74VHC1GT126MU2TCG 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 MC74VHC1GT126MU2TCG?
For technical support, including MC74VHC1GT126MU2TCG datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MC74VHC1GT126MU2TCG requirements.
6.How does Aetrix verify that MC74VHC1GT126MU2TCG is sourced from the original manufacturer or authorized distributors?
All MC74VHC1GT126MU2TCG 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 MC74VHC1GT126MU2TCG meets industry standards.
7.What is the process for return or replacement of MC74VHC1GT126MU2TCG?
All MC74VHC1GT126MU2TCG units undergo pre-shipment inspection (PSI). If there is an issue with MC74VHC1GT126MU2TCG, 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 MC74VHC1GT126MU2TCG part is unused and in its original packaging.
Return procedure for MC74VHC1GT126MU2TCG:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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