SN74ACT14NSRG4 Equivalent & Substitute Parts

Part Overview

The SN74ACT14NSRG4 is a 6-channel inverter IC with Schmitt trigger inputs manufactured by Texas Instruments in a 14-SO surface mount package. This part is discontinued at DiGi Electronics, making equivalent and substitute parts necessary for ongoing production and maintenance applications. The device operates within the 4.5V to 5.5V supply voltage range and is suitable for logic signal inversion with hysteresis characteristics provided by the Schmitt trigger configuration.

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	24mA, 24mA
Max Propagation Delay @ 5V, 50pF	11.5ns
Operating Temperature	-40°C ~ 85°C
Mounting Type	Surface Mount
Package / Case	14-SOIC
RoHS Status	ROHS3 Compliant

Substitute Part Grouping Explanation

Substitution for the SN74ACT14NSRG4 is determined by the following critical parameters:

Logic type (Inverter with Schmitt trigger)
Number of circuits (6) and inputs (1)
Supply voltage range (4.5V ~ 5.5V)
Output current capability (24mA minimum for both high and low states)
Propagation delay performance (11.5ns or better @ 5V, 50pF)
Operating temperature range (-40°C ~ 85°C)
Surface mount package compatibility (14-SOIC form factor)
Compliance certifications (ROHS3, REACH Unaffected, EAR99)

Substitute parts must match all functional and electrical parameters within the specified tolerances. Packaging variations (Tape & Reel vs. Cut Tape) do not affect electrical compatibility but may impact procurement and handling requirements.

Parameter Comparison

Parameter	SN74ACT14NSRG4	SN74ACT14NSR	MC74ACT14DR2G	74ACT14SCX
Manufacturer	Texas Instruments	Texas Instruments	onsemi	onsemi
Logic Type	Inverter	Inverter	Inverter	Inverter
Number of Circuits	6	6	6	6
Schmitt Trigger	Yes	Yes	Yes	Yes
Voltage - Supply	4.5V ~ 5.5V	4.5V ~ 5.5V	4.5V ~ 5.5V	4.5V ~ 5.5V
Current - Quiescent (Max)	2 µA	2 µA	4 µA	2 µA
Current - Output High, Low	24mA, 24mA	24mA, 24mA	24mA, 24mA	24mA, 24mA
Max Propagation Delay @ 5V, 50pF	11.5ns	11.5ns	11.5ns	10ns
Operating Temperature	-40°C ~ 85°C	-40°C ~ 85°C	-40°C ~ 85°C	-40°C ~ 85°C
Mounting Type	Surface Mount	Surface Mount	Surface Mount	Surface Mount
Package / Case	14-SOIC (0.209", 5.30mm)	14-SOIC (0.209", 5.30mm)	14-SOIC (0.154", 3.90mm)	14-SOIC (0.154", 3.90mm)
Product Status	Discontinued	Active	Active	Active
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant

Engineering Selection Recommendations

SN74ACT14NSR (Texas Instruments) is the primary parametric equivalent. It maintains identical electrical specifications and the same 14-SOIC package dimensions (0.209", 5.30mm width) as the original SN74ACT14NSRG4. This part is currently active in production and offers the closest functional match with no design modifications required. Packaging is available in Tape & Reel format.

MC74ACT14DR2G (onsemi) is a direct manufacturer alternative with active product status. It meets all functional requirements but features a narrower 14-SOIC package (0.154", 3.90mm width) and slightly higher quiescent current (4 µA vs. 2 µA). This part is suitable for applications where package footprint differences are acceptable and offers high inventory availability.

74ACT14SCX (onsemi) is the manufacturer-recommended substitute. It delivers superior propagation delay performance (10ns vs. 11.5ns @ 5V, 50pF) while maintaining identical quiescent current specifications. The narrower package footprint (0.154", 3.90mm width) is consistent with MC74ACT14DR2G. This part is actively produced and recommended for new designs prioritizing performance optimization.

All substitute parts carry ROHS3 compliance, REACH Unaffected status, and EAR99 classification, matching the regulatory profile of the original part.

Frequently Asked Questions (FAQ)

Q: Can I use MC74ACT14DR2G as a direct replacement for SN74ACT14NSRG4?

A: Yes, MC74ACT14DR2G is electrically compatible. However, the package width differs (0.154" vs. 0.209"), which may require PCB layout verification. Quiescent current is slightly higher at 4 µA compared to 2 µA. Propagation delay and output current specifications are identical.

Q: What is the difference between the package dimensions listed for these parts?

A: SN74ACT14NSRG4 and SN74ACT14NSR use a 14-SOIC package with 0.209" width. MC74ACT14DR2G and 74ACT14SCX use a narrower 14-SOIC package with 0.154" width. Both are 14-pin SOIC packages but with different body widths. PCB footprints must be verified for compatibility.

Q: Is 74ACT14SCX better than MC74ACT14DR2G?

A: 74ACT14SCX offers faster propagation delay (10ns vs. 11.5ns) and lower quiescent current (2 µA vs. 4 µA), making it suitable for timing-critical applications. Both parts are functionally equivalent for standard logic inversion applications. Selection depends on specific performance requirements.

Q: Why is the original SN74ACT14NSRG4 discontinued?

A: Product discontinuation is determined by manufacturer lifecycle decisions. Active alternatives with identical or superior specifications are available from both Texas Instruments (SN74ACT14NSR) and onsemi (MC74ACT14DR2G, 74ACT14SCX).

Q: Are all substitute parts RoHS compliant?

A: Yes, all listed substitute parts are ROHS3 compliant and REACH unaffected, matching the regulatory compliance of the original SN74ACT14NSRG4.

Q: What packaging formats are available for these substitutes?

A: SN74ACT14NSR is available in Tape & Reel format. MC74ACT14DR2G and 74ACT14SCX are available in Cut Tape and Digi-Reel formats. Packaging selection does not affect electrical performance.

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