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Home > Products > Integrated Circuits (ICs) > Logic > Buffers, Drivers, Receivers, Transceivers

onsemi MC74VHC1GT50DFT1G

Name: MC74VHC1GT50DFT1G
Brand: onsemi
SKU: MC74VHC1GT50DFT1G
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: MC74VHC1GT50DFT1G

Manufacturer:: onsemi

Category:: Buffers, Drivers, Receivers, Transceivers

Package:: 5-TSSOP, SC-70-5, SOT-353

Datasheet:: MC74VHC1GT50DFT1G.pdf

Description:: IC BUFFER NON-INVERT 5.5V SC88A

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Product details

Overview

MC74VHC1GT50DFT1G from onsemi is a single-channel TTL-input CMOS buffer in SC-88A (SOT-353) package, operating from 2.0 V to 5.5 V, with 3.5 ns typical propagation delay at 5 V, ±8 mA output drive at 3.0 V, and input/output over-voltage tolerance up to 5.5 V - used for level-shifting between 3 V and 5 V logic domains in portable instrumentation and industrial control I/O interfaces.

For engineers reviewing the MC74VHC1GT50DFT1G datasheet, pinout, applications, or equivalent options, key selection criteria include TTL-compatible input thresholds (VIH = 1.4 V min at 3 V), IOFF partial power-down support, 5-pin SC-88A footprint compatibility, and guaranteed operation across −55 °C to +125 °C.

Technical Context

The MC74VHC1GT50DFT1G implements a non-inverting buffer with TTL-level input thresholds (VIH = 1.4 V min at VCC = 3.0 V; VIL = 0.45 V max), enabling direct interfacing with legacy 5 V TTL outputs while powered from 3 V supplies. Its input structure tolerates up to 5.5 V regardless of VCC, supporting mixed-voltage domain translation without external clamping.

It features IOFF circuitry that disables output leakage when VCC = 0 V, preventing back-driving of powered-down rails during hot insertion or partial power-down sequences. The device uses advanced CMOS process technology with chip complexity under 100 FETs and supports tri-state–free operation with rail-to-rail output swing.

Key Specifications

Parameter	Value and Actual Design Meaning
VCC Range	2.0 V to 5.5 V - enables single-supply operation across 3 V and 5 V systems without level shifters.
tPD (typ)	3.5 ns at VCC = 5 V, CL = 15 pF - supports >100 MHz signal buffering in high-speed digital control paths.
IOH/IOL	±8 mA at VCC = 3.0 V - drives standard CMOS loads and small capacitive buses without external buffers.
Input Thresholds	VIH = 1.4 V min, VIL = 0.45 V max at VCC = 3.0 V - ensures reliable recognition of TTL logic levels from 5 V sources.
Over-Voltage Tolerance	Inputs/outputs withstand 5.5 V independent of VCC - eliminates need for external protection diodes in mixed-voltage interconnects.
IOFF Support	Active when VCC = 0 V - prevents current backflow into unpowered subsystems during power sequencing or hot-swap events.
Operating Temp	−55 °C to +125 °C - qualified for under-hood automotive, industrial PLC, and aerospace avionics environments.

Pinout & Package

MC74VHC1GT50DFT1G is packaged in SC-88A (Case 419A), a 5-pin, 2.0 mm × 2.1 mm surface-mount package with 0.65 mm pitch and exposed pad optional per variant. Pin 1 is marked by a dot or beveled edge; orientation follows Q2 tape-and-reel standard.

Pin/Terminal	Circuit Role	Design Meaning
1	NC	No-connect terminal - electrically isolated; must remain unconnected per datasheet to avoid parametric deviation.
2	A	True-buffer input - accepts TTL- or CMOS-level signals; VIH/VIL thresholds optimized for 5 V source compatibility.
3	GND	Ground reference - serves as return path for all internal logic and output current; requires low-impedance PCB connection.
4	Y	Non-inverting buffered output - delivers rail-to-rail CMOS swing with ±8 mA drive strength at 3 V supply.
5	VCC	Positive supply - powers internal logic and output stage; supports 2.0–5.5 V range with no external regulation required.

Key Features

Feature	Design Value
TTL-input compatibility	VIH ≤ 1.4 V and VIL ≥ 0.45 V at 3 V supply - enables direct interface with legacy 5 V TTL outputs without pull-ups or resistors.
Over-voltage tolerant I/O	Withstands 5.5 V on A or Y pins at any VCC (including 0 V) - removes need for external clamping diodes in mixed-rail designs.
IOFF partial power-down	Output leakage < 10 µA when VCC = 0 V - prevents bus contention and back-powering during system sleep or hot-plug sequences.
Wide temperature operation	Specified from −55 °C to +125 °C - supports deployment in engine control units, motor drives, and outdoor industrial gateways.
Pb-free & RoHS compliant	Meets JESD22-A114 MSL Level 1 - allows standard reflow assembly without moisture sensitivity concerns or special bake requirements.

Applications

Industrial Sensor Interface	Automotive Body Control Module
Use Scenario: Interfacing 5 V analog sensor outputs (e.g., pressure transducers) to 3.3 V microcontroller ADC inputs via digital enable/control lines. IC Role / Device Role / Timing Role: Level-shifting buffer for digital control signals, isolating 5 V sensor logic from 3.3 V MCU domain while maintaining timing integrity. Use Value: Eliminates discrete resistor-divider networks and reduces BOM count; 3.5 ns tPD preserves setup/hold margins in fast-sampling control loops.	Use Scenario: Driving LED status indicators and relay drivers from a 3.3 V body controller MCU while receiving wake-up signals from 5 V CAN transceiver sideband lines. IC Role / Device Role / Timing Role: Bidirectional voltage-domain translator for control and status signaling between 3.3 V logic and 5 V peripheral subsystems. Use Value: IOFF prevents back-current into MCU during battery disconnect; over-voltage tolerance avoids damage during load-dump transients.
Portable Medical Instrumentation	Programmable Logic Controller I/O Expansion
Use Scenario: Isolating low-power 3 V FPGA configuration logic from higher-voltage 5 V display interface and keypad scan circuits in handheld diagnostics devices. IC Role / Device Role / Timing Role: Unidirectional signal conditioner for FPGA I/O expansion, providing noise-immune logic translation with minimal propagation skew. Use Value: SC-88A footprint saves board space; −55 °C to +125 °C rating ensures reliability during sterilization cycles and field use.	Use Scenario: Adding isolated digital input conditioning to modular PLC backplanes where field-side 24 V sensors connect through optocoupler inputs referenced to 5 V logic rails. IC Role / Device Role / Timing Role: Input buffer stage converting optocoupler collector outputs (5 V swing) to clean 3.3 V logic levels for ARM-based controller inputs. Use Value: TTL input thresholds guarantee robust recognition of degraded opto-output waveforms; 8 mA drive supports long trace routing on dense backplane PCBs.

Industrial Sensor Interface

Automotive Body Control Module

Use Scenario: Interfacing 5 V analog sensor outputs (e.g., pressure transducers) to 3.3 V microcontroller ADC inputs via digital enable/control lines.

IC Role / Device Role / Timing Role: Level-shifting buffer for digital control signals, isolating 5 V sensor logic from 3.3 V MCU domain while maintaining timing integrity.

Use Value: Eliminates discrete resistor-divider networks and reduces BOM count; 3.5 ns tPD preserves setup/hold margins in fast-sampling control loops.

Use Scenario: Driving LED status indicators and relay drivers from a 3.3 V body controller MCU while receiving wake-up signals from 5 V CAN transceiver sideband lines.

IC Role / Device Role / Timing Role: Bidirectional voltage-domain translator for control and status signaling between 3.3 V logic and 5 V peripheral subsystems.

Use Value: IOFF prevents back-current into MCU during battery disconnect; over-voltage tolerance avoids damage during load-dump transients.

Portable Medical Instrumentation

Programmable Logic Controller I/O Expansion

Use Scenario: Isolating low-power 3 V FPGA configuration logic from higher-voltage 5 V display interface and keypad scan circuits in handheld diagnostics devices.

IC Role / Device Role / Timing Role: Unidirectional signal conditioner for FPGA I/O expansion, providing noise-immune logic translation with minimal propagation skew.

Use Value: SC-88A footprint saves board space; −55 °C to +125 °C rating ensures reliability during sterilization cycles and field use.

Use Scenario: Adding isolated digital input conditioning to modular PLC backplanes where field-side 24 V sensors connect through optocoupler inputs referenced to 5 V logic rails.

IC Role / Device Role / Timing Role: Input buffer stage converting optocoupler collector outputs (5 V swing) to clean 3.3 V logic levels for ARM-based controller inputs.

Use Value: TTL input thresholds guarantee robust recognition of degraded opto-output waveforms; 8 mA drive supports long trace routing on dense backplane PCBs.

Equivalent & Alternatives

The following parts are listed as comparable options for similar buffer applications.

Alternative Part	Technical Difference	Application Difference	Selection Advice
SN74LVC1G17DBVR	CMOS-input (not TTL-input); VIH = 2.0 V min at 3.3 V - requires pull-up for 5 V TTL compatibility.	Lacks over-voltage tolerance beyond VCC + 0.5 V; not rated for 5.5 V input stress.	Select when only CMOS-source interfacing is needed and board layout allows pull-up resistors.
74AUP1G17GW,125	Lower ICC (0.9 µA typ), slower tPD (10.5 ns at 3.3 V), same TTL-input thresholds but no IOFF support.	No power-down isolation - unsuitable for hot-swap or partial-power-down architectures.	Prefer for ultra-low-power always-on monitoring nodes where timing slack permits longer delays.

Compared with SN74LVC1G17DBVR and 74AUP1G17GW,125, the MC74VHC1GT50DFT1G uniquely combines TTL-input compatibility, 5.5 V over-voltage tolerance, and IOFF - making it the only choice for robust 3 V/5 V boundary buffering in thermally demanding, hot-pluggable, or safety-critical systems.

Availability

MC74VHC1GT50DFT1G 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 MC74VHC1GT50DFT1G 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, medical, and IoT applications.

The MC74VHC1GT50DFT1G belongs to the VHC1G logic family, engineered for high-speed, low-power, mixed-voltage interfacing in space-constrained embedded systems where reliability across harsh thermal and electrical environments is mandatory.

FAQ

What is the input voltage threshold behavior of MC74VHC1GT50DFT1G at 3.3 V supply?

The MC74VHC1GT50DFT1G features TTL-compatible input thresholds: VIH is guaranteed ≥1.4 V and VIL ≤0.45 V at VCC = 3.0 V, ensuring reliable recognition of standard 5 V TTL logic levels without external biasing. This behavior is confirmed in the DC Electrical Characteristics table for MC74VHC1GT50 on page 5 of the datasheet and applies directly to MC74VHC1GT50DFT1G as a member of that variant group.

Does MC74VHC1GT50DFT1G support partial power-down operation?

Yes, MC74VHC1GT50DFT1G includes IOFF circuitry that actively disables output leakage when VCC = 0 V, limiting IOFF to ≤10 µA per datasheet (page 4). This feature prevents back-driving of powered-down rails and is validated for hot-insertion scenarios - a key differentiator versus standard CMOS buffers like SN74LVC1G17.

Which package type does MC74VHC1GT50DFT1G use, and what are its mechanical dimensions?

MC74VHC1GT50DFT1G uses the SC-88A package (Case 419A), measuring 2.0 mm × 2.1 mm × 1.0 mm with 0.65 mm lead pitch. Pin 1 orientation follows Q2 tape-and-reel standard, and the package is Pb-free, halogen-free, and RoHS-compliant per datasheet page 7 ordering table and mechanical drawings.

Can MC74VHC1GT50DFT1G safely interface a 5 V microcontroller GPIO to a 3.3 V FPGA input?

Yes - MC74VHC1GT50DFT1G's inputs tolerate up to 5.5 V regardless of VCC, allowing direct connection of a 5 V GPIO to pin A while powering the device at 3.3 V. Its output Y swings rail-to-rail (0 V to 3.3 V), delivering clean CMOS levels compatible with FPGA I/O standards, as verified in the Recommended Operating Conditions table (page 4).

What is the maximum propagation delay of MC74VHC1GT50DFT1G under worst-case conditions?

The maximum propagation delay for MC74VHC1GT50DFT1G is 10.0 ns at VCC = 3.0–3.6 V, CL = 15 pF, and TA = −55 °C to +125 °C, per the AC Electrical Characteristics table (page 5). At 5 V supply and same load, max tPD is 8.0 ns - both values are guaranteed across full temperature and voltage ranges, not just typical.

MC74VHC1GT50DFT1G Specifications

Product attributes: Attribute value

Manufacturer:: onsemi

Series:: 74VHC

Package/Case:: 5-TSSOP, SC-70-5, SOT-353

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:: CMOS

Current - Output High, Low:: 8mA, 8mA

Voltage - Supply:: 1.65V ~ 5.5V

Operating Temperature:: -55°C ~ 125°C (TA)

Grade:: -

Qualification:: -

Mounting Type:: Surface Mount

Supplier Device Package:: SC-88A (SC-70-5/SOT-353)

MC74VHC1GT50DFT1G FAQ

1.How can I place an order for MC74VHC1GT50DFT1G through Aetrix?

Please submit a Request for Quotation (RFQ) for MC74VHC1GT50DFT1G 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 MC74VHC1GT50DFT1G reliable?

The price and inventory of MC74VHC1GT50DFT1G are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MC74VHC1GT50DFT1G is usually 5 days.

3.What payment methods are accepted for MC74VHC1GT50DFT1G?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MC74VHC1GT50DFT1G transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for MC74VHC1GT50DFT1G?

MC74VHC1GT50DFT1G orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your MC74VHC1GT50DFT1G 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 MC74VHC1GT50DFT1G?

For technical support, including MC74VHC1GT50DFT1G datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MC74VHC1GT50DFT1G requirements.

6.How does Aetrix verify that MC74VHC1GT50DFT1G is sourced from the original manufacturer or authorized distributors?

All MC74VHC1GT50DFT1G 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 MC74VHC1GT50DFT1G meets industry standards.

7.What is the process for return or replacement of MC74VHC1GT50DFT1G?

All MC74VHC1GT50DFT1G units undergo pre-shipment inspection (PSI). If there is an issue with MC74VHC1GT50DFT1G, 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 MC74VHC1GT50DFT1G part is unused and in its original packaging.

Return procedure for MC74VHC1GT50DFT1G:

1.Submit a request within 90 days.

2.Obtain a Return Material Authorization (RMA) from Aetrix.

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