SN74ACT14NSR Equivalent & Substitute Parts

Part Overview

The SN74ACT14NSR is a 6-channel inverter IC with Schmitt trigger inputs manufactured by Texas Instruments in a 14-SO surface mount package. This logic component is designed for signal inversion applications requiring hysteresis input characteristics. The part is currently active in production with full RoHS3 compliance and unlimited moisture sensitivity rating. Equivalent and substitute parts are identified based on matching functional specifications, electrical parameters, and package compatibility to support design flexibility and supply chain continuity.

Key Parameters

Parameter	Value
Logic Type	Inverter with Schmitt Trigger
Number of Circuits	6
Number of Inputs	1
Supply Voltage Range	4.5V ~ 5.5V
Operating Temperature	-40°C ~ 85°C
Package Type	14-SOIC Surface Mount
Output Current (High/Low)	24mA / 24mA
Max Propagation Delay	11.5ns @ 5V, 50pF
RoHS Status	ROHS3 Compliant

Substitute Part Grouping Explanation

Substitution eligibility is determined by the following criteria:

Primary Substitutes (Schmitt Trigger Inverters): Parts maintaining the Schmitt trigger feature with 6-channel inverter configuration, matching supply voltage range (4.5V ~ 5.5V), output current specifications (24mA), and operating temperature range (-40°C ~ 85°C). These parts are functionally equivalent for applications requiring hysteresis input characteristics.

Secondary Substitutes (Standard Inverters): Parts with 6-channel inverter configuration without Schmitt trigger feature, matching supply voltage, output current, and operating temperature specifications. These parts are suitable for applications where Schmitt trigger hysteresis is not required.

Package Compatibility: All substitute parts use 14-SOIC surface mount packaging with identical pin configuration and electrical interface, enabling direct board-level replacement.

Compliance Alignment: All substitute parts maintain RoHS3 compliance and unlimited moisture sensitivity rating (MSL 1), ensuring regulatory and environmental compatibility.

Parameter Comparison

Parameter	SN74ACT14NSR (TI)	MC74ACT14DR2G (onsemi)	74ACT14SCX (onsemi)	74ACT04SCX (onsemi)	74ACT04SC (onsemi)
Manufacturer	Texas Instruments	onsemi	onsemi	onsemi	onsemi
Logic Type	Inverter Schmitt Trigger	Inverter Schmitt Trigger	Inverter Schmitt Trigger	Inverter	Inverter
Number of Circuits	6	6	6	6	6
Supply Voltage	4.5V ~ 5.5V	4.5V ~ 5.5V	4.5V ~ 5.5V	4.5V ~ 5.5V	4.5V ~ 5.5V
Quiescent Current (Max)	2 µA	4 µA	2 µA	4 µA	4 µA
Output Current (High/Low)	24mA / 24mA	24mA / 24mA	24mA / 24mA	24mA / 24mA	24mA / 24mA
Max Propagation Delay @ 5V, 50pF	11.5ns	11.5ns	10ns	8.5ns	8.5ns
Operating Temperature	-40°C ~ 85°C	-40°C ~ 85°C	-40°C ~ 85°C	-40°C ~ 85°C	-40°C ~ 85°C
Package	14-SOIC (0.209", 5.30mm)	14-SOIC (0.154", 3.90mm)	14-SOIC (0.154", 3.90mm)	14-SOIC (0.154", 3.90mm)	14-SOIC (0.154", 3.90mm)
Packaging Format	Tape & Reel (TR)	Cut Tape & Digi-Reel	Cut Tape & Digi-Reel	Cut Tape & Digi-Reel	Tube
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
Product Status	Active	Active	Active	Active	Active

Engineering Selection Recommendations

Direct Functional Equivalents: MC74ACT14DR2G and 74ACT14SCX maintain identical Schmitt trigger inverter functionality with matching electrical specifications. Both parts are manufactured by onsemi and carry active product status with full RoHS3 compliance. Selection between these parts depends on packaging format requirements: MC74ACT14DR2G is available in Cut Tape & Digi-Reel format, while 74ACT14SCX is supplied in Cut Tape & Digi-Reel format with lower inventory levels.

Performance-Enhanced Alternatives: 74ACT04SCX and 74ACT04SC are standard inverters without Schmitt trigger functionality but offer improved propagation delay specifications (8.5ns versus 11.5ns). These parts are suitable for applications where input hysteresis is not required and faster signal inversion is beneficial. Both maintain identical supply voltage, output current, and operating temperature specifications.

Compliance and Regulatory: All substitute parts maintain ROHS3 compliance and unlimited moisture sensitivity rating (MSL 1), ensuring compatibility with current manufacturing and environmental standards. All parts carry active product status, confirming ongoing manufacturer support and availability.

Package Considerations: Substitute parts from onsemi use narrower 14-SOIC packages (0.154" width) compared to the Texas Instruments original (0.209" width). This dimensional difference does not affect electrical compatibility but may impact board layout spacing. Verify PCB footprint compatibility before design implementation.

Frequently Asked Questions (FAQ)

Q: Can MC74ACT14DR2G replace SN74ACT14NSR directly?

A: Yes. MC74ACT14DR2G is a direct functional equivalent with matching 6-channel Schmitt trigger inverter configuration, identical supply voltage range (4.5V ~ 5.5V), output current (24mA), and operating temperature range (-40°C ~ 85°C). Both parts use 14-SOIC surface mount packages with identical pin assignments. The primary difference is packaging format (Cut Tape & Digi-Reel versus Tape & Reel) and manufacturer (onsemi versus Texas Instruments).

Q: What is the difference between 74ACT14SCX and 74ACT04SCX?

A: 74ACT14SCX includes Schmitt trigger input hysteresis, while 74ACT04SCX is a standard inverter without hysteresis. Both are 6-channel inverters with identical supply voltage, output current, and operating temperature specifications. Selection depends on application requirements for input signal hysteresis. 74ACT04SCX offers faster propagation delay (8.5ns versus 10ns).

Q: Are the onsemi parts compatible with the Texas Instruments original in terms of pin configuration?

A: Yes. All substitute parts use 14-SOIC surface mount packages with identical pin assignments and electrical interface. Direct board-level replacement is supported without circuit modification.

Q: What is the significance of the package width difference (0.209" versus 0.154")?

A: The package width difference reflects different manufacturing standards between Texas Instruments and onsemi. The narrower onsemi packages (0.154") provide improved board density but require verification of PCB footprint compatibility. Electrical performance and pin configuration remain identical.

Q: Do all substitute parts meet the same compliance requirements?

A: Yes. All substitute parts carry ROHS3 compliance and unlimited moisture sensitivity rating (MSL 1), matching the original SN74ACT14NSR specifications. All parts maintain active product status with ongoing manufacturer support.

Q: Can 74ACT04SC be used in applications requiring Schmitt trigger functionality?

A: No. 74ACT04SC is a standard inverter without Schmitt trigger hysteresis. It is suitable only for applications where input hysteresis is not required. For Schmitt trigger applications, use MC74ACT14DR2G or 74ACT14SCX.

Q: What are the inventory considerations for these substitute parts?

A: MC74ACT14DR2G has the highest inventory availability (235,100 pcs), followed by 74ACT04SCX (110,558 pcs), 74ACT04SC (3,253 pcs), and 74ACT14SCX (11,774 pcs). The original SN74ACT14NSR has 2,641 pcs in stock. Inventory levels may influence supply chain decisions for high-volume applications.

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