SN74AHCU04RGYRG4 Equivalent & Substitute Parts

Part Overview

The SN74AHCU04RGYRG4 is a 6-channel inverter logic IC manufactured by Texas Instruments in a 14-VQFN (4.6x4.6) surface mount package. This part is classified as obsolete, making identification of functionally equivalent alternatives necessary for ongoing design support and procurement planning. The device operates across a 2V to 5.5V supply voltage range and is suitable for general-purpose logic inversion applications requiring low quiescent current and fast propagation delay characteristics.

Key Parameters

Parameter	Value
Logic Type	Inverter
Number of Circuits	6
Number of Inputs	1
Voltage - Supply	2V ~ 5.5V
Current - Quiescent (Max)	2 µA
Current - Output High, Low	8mA, 8mA
Input Logic Level - Low	0.3V ~ 1.1V
Input Logic Level - High	1.7V ~ 4.4V
Max Propagation Delay @ 5V, 50pF	7ns
Operating Temperature	-40°C ~ 85°C
Mounting Type	Surface Mount
Package / Case	14-VFQFN Exposed Pad
RoHS Status	ROHS3 Compliant
Moisture Sensitivity Level (MSL)	2 (1 Year)

Substitute Part Grouping Explanation

Substitution of the SN74AHCU04RGYRG4 is based on strict equivalence of the following electrical and mechanical parameters:

Logic type and circuit configuration (6-channel inverter, 1 input per channel)
Supply voltage range (2V ~ 5.5V minimum requirement)
Output current capability (8mA minimum for both high and low states)
Input logic level thresholds (0.3V ~ 1.1V for low, 1.7V ~ 4.4V for high)
Propagation delay performance (7ns @ 5V, 50pF maximum)
Surface mount packaging with 14-pin VFQFN configuration
RoHS3 compliance and EAR99 export classification

The identified substitute part, 74AHCU04BQ,115 from Nexperia USA Inc., maintains all critical electrical parameters while offering an active product status and improved operating temperature range. Package geometry differs (14-DHVQFN 2.5x3 versus 14-VQFN 4.6x4.6), requiring PCB layout verification for pin-to-pin compatibility.

Parameter Comparison

Parameter	SN74AHCU04RGYRG4 (TI)	74AHCU04BQ,115 (Nexperia)	Match Status
Logic Type	Inverter	Inverter	Identical
Number of Circuits	6	6	Identical
Number of Inputs	1	1	Identical
Voltage - Supply	2V ~ 5.5V	2V ~ 5.5V	Identical
Current - Quiescent (Max)	2 µA	2 µA	Identical
Current - Output High, Low	8mA, 8mA	8mA, 8mA	Identical
Input Logic Level - Low	0.3V ~ 1.1V	0.3V ~ 1.1V	Identical
Input Logic Level - High	1.7V ~ 4.4V	1.7V ~ 4.4V	Identical
Max Propagation Delay @ 5V, 50pF	7ns	7ns	Identical
Operating Temperature	-40°C ~ 85°C	-40°C ~ 125°C	Substitute Exceeds
Mounting Type	Surface Mount	Surface Mount	Identical
Package / Case	14-VFQFN Exposed Pad	14-VFQFN Exposed Pad	Identical
Supplier Device Package	14-VQFN (4.6x4.6)	14-DHVQFN (2.5x3)	Different Geometry
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	Identical
Moisture Sensitivity Level (MSL)	2 (1 Year)	1 (Unlimited)	Substitute Exceeds
Product Status	Obsolete	Active	Substitute Active

Engineering Selection Recommendations

The 74AHCU04BQ,115 from Nexperia USA Inc. is the qualified substitute for the obsolete SN74AHCU04RGYRG4. Selection is based on:

Complete electrical parameter equivalence across all specified operating conditions
Active product status ensuring long-term availability and supply chain continuity
Extended operating temperature range (-40°C to 125°C versus -40°C to 85°C), providing additional thermal margin
Improved moisture sensitivity level (MSL 1 with unlimited shelf life versus MSL 2 with 1-year limit), reducing storage and handling constraints
Identical RoHS3 compliance and EAR99 export classification
Pin-compatible 14-pin VFQFN package with exposed pad

Physical package dimensions differ between the two variants (14-DHVQFN 2.5x3 for Nexperia versus 14-VQFN 4.6x4.6 for Texas Instruments). PCB layout and footprint verification is required prior to implementation to confirm mechanical fit and thermal management compatibility.

Frequently Asked Questions (FAQ)

Q: Can the 74AHCU04BQ,115 be used as a direct replacement for the SN74AHCU04RGYRG4?

A: Electrical substitution is complete. All logic levels, propagation delay, output current, and supply voltage specifications are identical. Physical package dimensions differ, requiring PCB footprint verification before board-level implementation.

Q: What is the primary reason for substitution?

A: The SN74AHCU04RGYRG4 is classified as obsolete. The 74AHCU04BQ,115 maintains identical electrical performance while offering active product status and improved reliability characteristics (extended temperature range and superior moisture sensitivity rating).

Q: Are there any compliance or certification differences?

A: Both parts are ROHS3 compliant and classified as EAR99 for export purposes. The substitute part offers improved moisture sensitivity level (MSL 1 unlimited versus MSL 2 one-year), reducing handling and storage requirements.

Q: What is the difference between the 14-VQFN and 14-DHVQFN packages?

A: Both are 14-pin very thin quad flat no-lead packages with exposed pads. The primary difference is physical footprint: 14-VQFN measures 4.6x4.6mm while 14-DHVQFN measures 2.5x3mm. Pin pitch and electrical connectivity remain compatible; PCB layout adjustment is necessary.

Q: Does the extended operating temperature range of the substitute part affect compatibility?

A: No. The substitute part's extended range (-40°C to 125°C) is a superset of the original specification (-40°C to 85°C). Applications operating within the original temperature window will function identically.

Q: What packaging format is available for the substitute part?

A: The 74AHCU04BQ,115 is supplied in Tape & Reel (TR) format, standard for high-volume surface mount assembly operations.

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