SN74AHCT14RGYRG4 Equivalent & Substitute Parts

Part Overview

The SN74AHCT14RGYRG4 is a 6-channel inverter IC with Schmitt trigger inputs in a 14-VQFN (4.6x4.6) surface mount package. This logic device operates at 4.5V to 5.5V supply voltage and is designed for digital signal inversion applications requiring hysteresis input characteristics. The part is currently discontinued at DiGi Electronics, making equivalent substitute parts necessary for ongoing production and maintenance applications.

Key Parameters

Parameter	Value
Logic Type	Inverter
Number of Circuits	6
Number of Inputs	1
Features	Schmitt Trigger
Voltage - Supply	4.5V ~ 5.5V
Current - Quiescent (Max)	2 µA
Current - Output High, Low	8mA, 8mA
Input Logic Level - Low	0.5V ~ 0.6V
Input Logic Level - High	1.9V ~ 2.1V
Max Propagation Delay @ V, Max CL	8ns @ 5V, 50pF
Operating Temperature	-40°C ~ 85°C
Mounting Type	Surface Mount
Package / Case	14-VFQFN Exposed Pad
Base Product Number	74AHCT14

Substitute Part Grouping Explanation

Substitution for the SN74AHCT14RGYRG4 is determined by strict equivalence across the following critical parameters:

Logic Type: Inverter with 6 channels and 1 input per channel
Schmitt Trigger feature requirement
Voltage supply range: 4.5V ~ 5.5V
Quiescent current: 2 µA maximum
Output drive capability: 8mA high and low
Input logic thresholds: Low 0.5V ~ 0.6V, High 1.9V ~ 2.1V
Propagation delay: 8ns @ 5V, 50pF
Operating temperature range: -40°C ~ 85°C
Package type: 14-VFQFN Exposed Pad (4.6x4.6)
Base product series: 74AHCT14

The SN74AHCT14RGYR meets all these parameters and qualifies as a parametric equivalent. The primary difference is packaging format (Tape & Reel vs. individual packaging) and product status (Active vs. Discontinued).

Parameter Comparison

Parameter	SN74AHCT14RGYRG4 (Main)	SN74AHCT14RGYR (Substitute)
Manufacturer	Texas Instruments	Texas Instruments
Logic Type	Inverter	Inverter
Number of Circuits	6	6
Number of Inputs	1	1
Features	Schmitt Trigger	Schmitt Trigger
Voltage - Supply	4.5V ~ 5.5V	4.5V ~ 5.5V
Current - Quiescent (Max)	2 µA	2 µA
Current - Output High, Low	8mA, 8mA	8mA, 8mA
Input Logic Level - Low	0.5V ~ 0.6V	0.5V ~ 0.6V
Input Logic Level - High	1.9V ~ 2.1V	1.9V ~ 2.1V
Max Propagation Delay @ V, Max CL	8ns @ 5V, 50pF	8ns @ 5V, 50pF
Operating Temperature	-40°C ~ 85°C	-40°C ~ 85°C
Mounting Type	Surface Mount	Surface Mount
Package / Case	14-VFQFN Exposed Pad	14-VFQFN Exposed Pad
Base Product Number	74AHCT14	74AHCT14
Product Status	Discontinued at DiGi Electronics	Active
Packaging Format	Individual packaging	Tape & Reel (TR)
RoHS Status	ROHS3 Compliant	ROHS3 Compliant
REACH Status	REACH Unaffected	REACH Unaffected

Engineering Selection Recommendations

The SN74AHCT14RGYR is a direct parametric equivalent to the SN74AHCT14RGYRG4. Both parts are manufactured by Texas Instruments, share identical electrical specifications, and are housed in the same 14-VFQFN package. Both maintain ROHS3 compliance and REACH unaffected status.

The primary distinction is product availability status: the SN74AHCT14RGYRG4 is discontinued at DiGi Electronics, while the SN74AHCT14RGYR remains in active production. The SN74AHCT14RGYR is supplied in Tape & Reel format, which is standard for high-volume manufacturing and assembly operations.

For new designs or production runs, the SN74AHCT14RGYR should be selected as the active equivalent. For existing inventory management or legacy system support, the SN74AHCT14RGYRG4 may be used interchangeably where stock remains available.

Frequently Asked Questions (FAQ)

Q: Can the SN74AHCT14RGYR be used as a direct replacement for the SN74AHCT14RGYRG4?

A: Yes. Both parts are parametrically identical across all electrical and mechanical specifications. The only differences are product status (active vs. discontinued) and packaging format (Tape & Reel vs. individual packaging). Pin configuration, electrical performance, and package dimensions are identical.

Q: What is the difference between the packaging formats?

A: The SN74AHCT14RGYRG4 uses individual packaging, while the SN74AHCT14RGYR is supplied in Tape & Reel (TR) format. Tape & Reel packaging is designed for automated pick-and-place assembly equipment and is standard for production environments. Both formats contain the same die and deliver identical electrical performance.

Q: Are there any compliance or certification differences?

A: No. Both parts maintain identical RoHS3 compliance and REACH unaffected status. Environmental and regulatory certifications are equivalent.

Q: What is the Schmitt trigger feature and why is it important for substitution?

A: The Schmitt trigger input provides hysteresis, which improves noise immunity by establishing separate voltage thresholds for rising and falling edges. This feature is integral to the 74AHCT14 function and must be present in any substitute part. Both the main part and substitute include this feature.

Q: Can I use other 74AHCT14 variants from different manufacturers?

A: Substitution must be limited to parts meeting all specified parameters. Only parts with identical logic type, channel count, Schmitt trigger feature, voltage range, current ratings, timing specifications, and package type qualify as equivalents. Verification against the parameter comparison table is required.

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