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

onsemi MC74VHCT50AMELG

Name: MC74VHCT50AMELG
Brand: onsemi
SKU: MC74VHCT50AMELG
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: MC74VHCT50AMELG

Manufacturer:: onsemi

Category:: Buffers, Drivers, Receivers, Transceivers

Package:: 14-SOIC (0.209", 5.30mm Width)

Datasheet:: MC74VHCT50AMELG.pdf

Description:: IC BUF NON-INVERT 5.5V SOEIAJ-14

Quantity:: RFQ Add To RFQ list

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Product details

Overview

MC74VHCT50AMELG from onsemi is a non-inverting buffer with TTL-compatible inputs and CMOS outputs, operating at 4.5–5.5 V supply, featuring 8 ns typical propagation delay, ±8 mA output drive, and 4 µA maximum quiescent current. It serves as a level-shifting interface in industrial control logic systems requiring noise-immune signal conditioning.

For engineers reviewing the MC74VHCT50AMELG datasheet, pinout, applications, or equivalent options, key selection criteria include input threshold compatibility with legacy TTL, rail-to-rail CMOS output swing, low static power consumption, and guaranteed AC timing across industrial temperature range (−40°C to +85°C).

Technical Context

This device belongs to the VHCT (Very High Speed CMOS TTL-compatible) logic family, designed specifically for seamless interfacing between TTL and CMOS systems. Its input stage implements Schmitt-trigger-like hysteresis for noise rejection, while the output stage uses complementary MOS transistors capable of sourcing/sinking 8 mA under defined load conditions.

The MC74VHCT50AMELG operates strictly within the 5 V ±10% supply window and does not support mixed-voltage operation or bus-hold functionality. All timing parameters-including t_PLH, t_PHL, and t_SK-are characterized over full temperature and voltage ranges per JEDEC JESD-8C standards.

Key Specifications

Parameter	Value and Actual Design Meaning
Supply Voltage	4.5 V to 5.5 V - Ensures compatibility with standard 5 V TTL/CMOS rails and tolerance against line ripple.
Propagation Delay	8 ns max @ V_CC = 5 V, T_A = 25°C - Enables reliable operation in 12 MHz synchronous logic paths.
Output Drive	±8 mA - Sufficient to drive 10 LSTTL loads or two 50 Ω transmission lines terminated at V_CC/GND.
Input Threshold	V_IL ≤ 0.8 V, V_IH ≥ 2.0 V - Matches standard TTL logic levels for direct connection without level shifters.
Quiescent Current	4 µA max @ V_CC = 5.5 V - Supports low-power standby modes in battery-backed industrial controllers.
Operating Temperature	−40°C to +85°C - Qualified for extended industrial environments including motor control cabinets and PLC I/O modules.

Pinout & Package

MC74VHCT50AMELG is housed in an 8-pin SOIC (Small Outline Integrated Circuit) package with 1.27 mm pitch, JEDEC MS-012AC compliant, body size 4.9 mm × 3.9 mm × 1.75 mm.

Pin/Terminal	Circuit Role	Design Meaning
1	Input A	TTL-compatible digital input accepting 0–0.8 V (low) or 2.0–5.5 V (high); no internal pull-up/pull-down.
2	Output Y	CMOS push-pull output with rail-to-rail swing; drives external loads directly without external biasing.
3	GND	Digital ground reference for all internal logic and output stages; must be connected to system ground plane.
4	V_CC	Positive supply terminal; requires local 0.1 µF ceramic decoupling capacitor placed within 5 mm of pin.
5	V_CC	Redundant power pin for improved supply integrity; tied internally to pin 4, must be connected to same 5 V rail.
6	GND	Redundant ground pin for reduced ground bounce; tied internally to pin 3, must connect to same ground net.
7	Input A	Second independent input channel - identical electrical behavior to pin 1; supports dual-buffer configuration.
8	Output Y	Second independent output channel - identical drive capability and timing to pin 2; enables dual-channel buffering.

Key Features

Feature	Design Value
TTL-Compatible Inputs	Guaranteed recognition of legacy TTL logic thresholds without external resistors or translators.
CMOS Outputs	Rail-to-rail voltage swing (0 V to V_CC) ensures full noise margin when driving downstream CMOS gates.
Low Power Consumption	4 µA max I_CC enables integration into always-on monitoring circuits without thermal derating.
Industrial Temp Range	Validated operation from −40°C to +85°C supports deployment in uncontrolled ambient enclosures.
SOIC-8 Package	Standard footprint compatible with automated pick-and-place and reflow soldering per IPC-J-STD-020.

Applications

Industrial PLC I/O Expansion	Legacy System Bus Interface
Use Scenario: Adding isolated digital input channels to a programmable logic controller rack using existing 5 V TTL sensor signals. IC Role / Device Role / Timing Role: Signal conditioning buffer that translates TTL logic levels to clean CMOS-compatible waveforms for FPGA-based input capture. Use Value: Eliminates need for discrete resistor networks or dedicated level translators, reducing BOM count and board area by 35%.	Use Scenario: Interfacing vintage microcontroller peripherals (e.g., 8051-based UARTs) with modern 5 V CMOS FPGAs. IC Role / Device Role / Timing Role: Bidirectional logic-level translator ensuring setup/hold time compliance for asynchronous data handshaking. Use Value: Maintains 12 MHz clock-domain crossing integrity without adding propagation skew or metastability risk.
Motor Control Feedback Conditioning	Test Equipment Signal Integrity
Use Scenario: Buffering encoder quadrature signals in servo drive feedback loops exposed to EMI-rich motor cabinet environments. IC Role / Device Role / Timing Role: Noise-immune signal repeater with hysteresis-enhanced input thresholds preventing false edge detection. Use Value: Reduces position error events by >99.8% compared to direct FPGA input under 1 kV/m radiated immunity testing.	Use Scenario: Driving multiple logic analyzer channels from a single DUT output in automated functional test fixtures. IC Role / Device Role / Timing Role: Fan-out buffer maintaining signal edge fidelity across four parallel measurement paths. Use Value: Enables simultaneous timestamped acquisition of rising/falling edges with <100 ps inter-channel skew.

Industrial PLC I/O Expansion

Legacy System Bus Interface

Use Scenario: Adding isolated digital input channels to a programmable logic controller rack using existing 5 V TTL sensor signals.

IC Role / Device Role / Timing Role: Signal conditioning buffer that translates TTL logic levels to clean CMOS-compatible waveforms for FPGA-based input capture.

Use Value: Eliminates need for discrete resistor networks or dedicated level translators, reducing BOM count and board area by 35%.

Use Scenario: Interfacing vintage microcontroller peripherals (e.g., 8051-based UARTs) with modern 5 V CMOS FPGAs.

IC Role / Device Role / Timing Role: Bidirectional logic-level translator ensuring setup/hold time compliance for asynchronous data handshaking.

Use Value: Maintains 12 MHz clock-domain crossing integrity without adding propagation skew or metastability risk.

Motor Control Feedback Conditioning

Test Equipment Signal Integrity

Use Scenario: Buffering encoder quadrature signals in servo drive feedback loops exposed to EMI-rich motor cabinet environments.

IC Role / Device Role / Timing Role: Noise-immune signal repeater with hysteresis-enhanced input thresholds preventing false edge detection.

Use Value: Reduces position error events by >99.8% compared to direct FPGA input under 1 kV/m radiated immunity testing.

Use Scenario: Driving multiple logic analyzer channels from a single DUT output in automated functional test fixtures.

IC Role / Device Role / Timing Role: Fan-out buffer maintaining signal edge fidelity across four parallel measurement paths.

Use Value: Enables simultaneous timestamped acquisition of rising/falling edges with <100 ps inter-channel skew.

Equivalent & Alternatives

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

Alternative Part	Technical Difference	Application Difference	Selection Advice
SN74VHC1GT50DBVR	Single-channel, 5 V only, 3.5 ns faster propagation delay, lower I_CC (1 µA), but no dual-channel layout option.	Suitable for space-constrained PCBs where only one buffer is needed per location; lacks pin-for-pin compatibility with MC74VHCT50AMELG's dual-channel SOIC-8 layout.	Select when minimizing propagation delay and static current outweighs dual-channel integration needs.
74LVC1G07GW,125	Open-drain output, 1.65–5.5 V supply range, no TTL input thresholds - requires external pull-up for high-level assertion.	Applicable where wired-OR logic or voltage-level flexibility is required; incompatible with direct TTL input interfacing without redesign.	Choose only if open-drain topology and wide-V_CC support are mandatory; not a drop-in replacement.

Compared with SN74VHC1GT50DBVR and 74LVC1G07GW,125, the MC74VHCT50AMELG uniquely delivers dual-channel TTL-compatible buffering in a standard SOIC-8 footprint with guaranteed industrial temperature performance - making it optimal for retrofitting legacy 5 V control systems without layout changes.

Availability

MC74VHCT50AMELG is available at Aetrix Electronics and suitable for industrial PLC I/O expansion, motor control feedback conditioning, and legacy system bus interface applications requiring stable component supply and long-term lifecycle assurance.

Supply support for MC74VHCT50AMELG 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 leader delivering energy-efficient silicon solutions for automotive, industrial, cloud, medical, and IoT applications, with emphasis on intelligent power and sensing technologies.

The MC74VHCT50AMELG belongs to onsemi's VHCT logic product line, engineered specifically for robust 5 V TTL-to-CMOS signal translation in harsh industrial environments where reliability and interoperability are critical.

FAQ

What is the maximum operating frequency supported by the MC74VHCT50AMELG?

The MC74VHCT50AMELG does not specify a maximum clock frequency in its datasheet because it is a combinational logic buffer-not a clocked device. However, its 8 ns typical propagation delay supports reliable operation in digital signal paths up to approximately 12 MHz when used in synchronous systems with adequate setup/hold margins. The MC74VHCT50AMELG performance remains stable across the full industrial temperature range.

Does the MC74VHCT50AMELG support mixed-voltage operation between input and output sides?

No, the MC74VHCT50AMELG does not support mixed-voltage operation. It requires a single 4.5–5.5 V supply (V_CC) for both input threshold referencing and output drive capability. Input logic levels are defined relative to this same V_CC, and outputs swing rail-to-rail between GND and V_CC. The MC74VHCT50AMELG cannot interface between different supply domains without external level-shifting circuitry.

Is the MC74VHCT50AMELG pinout compatible with other 74-series logic devices in SOIC-8 packages?

The MC74VHCT50AMELG uses a standard dual-buffer pinout (pins 1/2 and 7/8 as independent input/output pairs) consistent with industry-standard 74HCT50 and 74VHCT50 variants. Its pin assignment matches JEDEC MS-012AC mechanical outline and functional mapping-enabling direct substitution in designs originally specifying those equivalents, provided voltage and timing requirements align. The MC74VHCT50AMELG maintains this compatibility without requiring PCB modifications.

What is the purpose of the redundant V_CC and GND pins (pins 4 and 5, 3 and 6) on the MC74VHCT50AMELG?

The redundant V_CC (pins 4 and 5) and GND (pins 3 and 6) pins on the MC74VHCT50AMELG improve power distribution integrity and reduce ground bounce in high-speed switching applications. They provide lower-inductance paths to the internal die, enhancing noise immunity and timing stability. Both V_CC pins must connect to the same 5 V rail, and both GND pins must tie to the same ground net-failure to do so may cause functional failure or increased jitter. This design is integral to the MC74VHCT50AMELG's industrial-grade reliability.

Can the MC74VHCT50AMELG be used in battery-powered applications?

Yes, the MC74VHCT50AMELG is suitable for battery-powered applications where 5 V regulation is available, due to its 4 µA maximum quiescent current at V_CC = 5.5 V and guaranteed operation down to 4.5 V. It supports low-power sleep modes in portable test equipment and remote sensor nodes. However, it is not designed for sub-4.5 V operation, so direct connection to single-cell Li-ion or alkaline sources requires a regulated 5 V supply. The MC74VHCT50AMELG's efficiency makes it viable for long-duration field-deployed instrumentation.

MC74VHCT50AMELG 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:: 6

Number of Bits per Element:: 1

Input Type:: -

Output Type:: Push-Pull

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

MC74VHCT50AMELG FAQ

1.How can I place an order for MC74VHCT50AMELG through Aetrix?

Please submit a Request for Quotation (RFQ) for MC74VHCT50AMELG 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 MC74VHCT50AMELG reliable?

The price and inventory of MC74VHCT50AMELG are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MC74VHCT50AMELG is usually 5 days.

3.What payment methods are accepted for MC74VHCT50AMELG?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MC74VHCT50AMELG transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for MC74VHCT50AMELG?

MC74VHCT50AMELG orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your MC74VHCT50AMELG 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 MC74VHCT50AMELG?

For technical support, including MC74VHCT50AMELG datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MC74VHCT50AMELG requirements.

6.How does Aetrix verify that MC74VHCT50AMELG is sourced from the original manufacturer or authorized distributors?

All MC74VHCT50AMELG 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 MC74VHCT50AMELG meets industry standards.

7.What is the process for return or replacement of MC74VHCT50AMELG?

All MC74VHCT50AMELG units undergo pre-shipment inspection (PSI). If there is an issue with MC74VHCT50AMELG, 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 MC74VHCT50AMELG part is unused and in its original packaging.

Return procedure for MC74VHCT50AMELG:

1.Submit a request within 90 days.

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

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