SN74AC14PW Equivalent & Substitute Parts

Part Overview

The SN74AC14PW is a 6-channel inverter IC with Schmitt trigger inputs manufactured by Texas Instruments in a 14-TSSOP surface mount package. This logic component is currently discontinued at DiGi Electronics, making equivalent substitute parts essential for ongoing production and maintenance applications. The Schmitt trigger feature provides hysteresis for improved noise immunity in digital signal inversion circuits. Identifying compatible alternatives ensures design continuity and supply chain flexibility.

Key Parameters

Parameter	Value
Logic Type	Inverter
Number of Circuits	6
Number of Inputs	6
Features	Schmitt Trigger
Voltage - Supply	2V ~ 6V
Current - Quiescent (Max)	2 µA
Current - Output High, Low	24mA, 24mA
Input Logic Level - Low	0.5V ~ 1.1V
Input Logic Level - High	2.2V ~ 3.9V
Max Propagation Delay @ 5V, 50pF	10ns
Operating Temperature	-40°C ~ 85°C
Mounting Type	Surface Mount
Package / Case	14-TSSOP (0.173", 4.40mm Width)
RoHS Status	ROHS3 Compliant
Moisture Sensitivity Level (MSL)	1 (Unlimited)

Substitute Part Grouping Explanation

Substitution of the SN74AC14PW is determined by strict equivalence across the following critical parameters:

Logic Configuration: All substitutes must provide 6-channel inverter functionality with Schmitt trigger inputs
Electrical Specifications: Supply voltage range (2V ~ 6V), output current capability (24mA), and propagation delay (10ns @ 5V, 50pF) must be identical
Package Compatibility: All substitutes must use the 14-TSSOP surface mount package with identical pinout and physical dimensions
Thermal and Environmental: Operating temperature range (-40°C ~ 85°C) and compliance certifications (ROHS3, REACH Unaffected) must match
Series Designation: All parts belong to the 74AC logic family

The three identified substitutes meet all these criteria and are functionally interchangeable with the SN74AC14PW.

Parameter Comparison

Parameter	SN74AC14PW (Main)	SN74AC14PWR	74AC14MTCX	MC74AC14DTR2G
Manufacturer	Texas Instruments	Texas Instruments	onsemi	onsemi
Product Status	Discontinued	Active	Active	Active
Packaging	Tube	Cut Tape (CT) & Digi-Reel®	Tape & Reel (TR)	Tape & Reel (TR)
Logic Type	Inverter	Inverter	Inverter	Inverter
Number of Circuits	6	6	6	6
Number of Inputs	6	6	6	6
Features	Schmitt Trigger	Schmitt Trigger	Schmitt Trigger	Schmitt Trigger
Voltage - Supply	2V ~ 6V	2V ~ 6V	2V ~ 6V	2V ~ 6V
Current - Quiescent (Max)	2 µA	2 µA	2 µA	4 µA
Current - Output High, Low	24mA, 24mA	24mA, 24mA	24mA, 24mA	24mA, 24mA
Input Logic Level - Low	0.5V ~ 1.1V	0.5V ~ 1.1V	0.5V ~ 1.1V	0.5V ~ 1.1V
Input Logic Level - High	2.2V ~ 3.9V	2.2V ~ 3.9V	2.2V ~ 3.9V	2.2V ~ 3.9V
Max Propagation Delay @ 5V, 50pF	10ns	10ns	10ns	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-TSSOP	14-TSSOP	14-TSSOP	14-TSSOP
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
Moisture Sensitivity Level (MSL)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)
REACH Status	REACH Unaffected	REACH Unaffected	REACH Unaffected	REACH Unaffected

Engineering Selection Recommendations

SN74AC14PWR (Texas Instruments, Active Status): This is the primary substitute for the discontinued SN74AC14PW. Both are manufactured by Texas Instruments and share identical electrical and thermal specifications. The SN74AC14PWR is currently in active production status, ensuring long-term availability. The packaging format differs (Cut Tape & Digi-Reel® versus Tube), but the component itself is electrically equivalent. This part is recommended for direct replacement in new designs and production runs.

74AC14MTCX (onsemi, Active Status): This onsemi-manufactured alternative meets all electrical and package specifications of the SN74AC14PW. With active product status and Tape & Reel packaging, it provides supply chain diversity. All critical parameters including quiescent current (2 µA), output drive capability, and propagation delay are identical to the main part.

MC74AC14DTR2G (onsemi, Active Status): This onsemi part is functionally equivalent with one specification variance: maximum quiescent current is rated at 4 µA compared to 2 µA for the main part. This higher quiescent current remains within acceptable limits for most applications but should be evaluated in power-sensitive designs. The part maintains all other electrical and package specifications. Active production status ensures availability.

All three substitutes carry ROHS3 compliance and REACH Unaffected status, meeting current environmental and regulatory requirements.

Frequently Asked Questions (FAQ)

Q: Can SN74AC14PWR be used as a direct replacement for SN74AC14PW?

A: Yes. Both parts are manufactured by Texas Instruments with identical electrical specifications, operating temperature range, and 14-TSSOP package. The only difference is packaging format (Cut Tape & Digi-Reel® versus Tube). The component functionality and pinout are equivalent.

Q: What is the difference between the Texas Instruments and onsemi substitutes?

A: All three substitutes meet the same electrical and package specifications. The primary differences are manufacturer and product status. Texas Instruments (SN74AC14PWR) and onsemi (74AC14MTCX and MC74AC14DTR2G) are both active manufacturers of 74AC14 logic inverters. Selection may depend on supply availability, procurement preferences, or existing supplier relationships.

Q: Does MC74AC14DTR2G have higher quiescent current than the other substitutes?

A: Yes. MC74AC14DTR2G is specified with a maximum quiescent current of 4 µA, while SN74AC14PW, SN74AC14PWR, and 74AC14MTCX are specified at 2 µA. This difference should be evaluated in applications where standby power consumption is critical. For most standard logic applications, the 4 µA specification remains acceptable.

Q: Are all substitutes available in the same 14-TSSOP package?

A: Yes. All substitutes use the 14-TSSOP surface mount package with identical physical dimensions (0.173" width, 4.40mm). Pinout and land pattern compatibility are maintained across all parts.

Q: What compliance certifications do these substitutes carry?

A: All substitutes are ROHS3 compliant and REACH Unaffected. Moisture Sensitivity Level (MSL) is rated at 1 (Unlimited) for all parts, indicating no moisture sensitivity restrictions during storage or handling.

Q: Can these parts be used interchangeably in existing designs?

A: Yes, with the exception noted for MC74AC14DTR2G regarding quiescent current. For applications where the 2 µA specification is critical, use SN74AC14PWR or 74AC14MTCX. For general-purpose inverter applications, all three substitutes are interchangeable.

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