SN74HC14PWT Equivalent & Substitute Parts

Part Overview

The SN74HC14PWT is a 6-channel inverter IC with Schmitt trigger inputs manufactured by Texas Instruments in a 14-TSSOP surface mount package. This part is discontinued at DiGi Electronics, making equivalent substitutes necessary for ongoing production and maintenance applications. The device operates across a 2V to 6V supply range and is suitable for logic signal inversion in digital circuits requiring hysteresis input characteristics.

Key Parameters

Parameter	Value
Logic Type	Inverter
Number of Circuits	6
Number of Inputs	1
Features	Schmitt Trigger
Voltage - Supply	2V ~ 6V
Current - Quiescent (Max)	2 µA
Current - Output High, Low	5.2mA, 5.2mA
Input Logic Level - Low	0.3V ~ 1.2V
Input Logic Level - High	1.5V ~ 4.2V
Max Propagation Delay @ 6V, 50pF	21ns
Operating Temperature	-40°C ~ 85°C
Package / Case	14-TSSOP (0.173", 4.40mm Width)
Mounting Type	Surface Mount
RoHS Status	ROHS3 Compliant
Moisture Sensitivity Level (MSL)	1 (Unlimited)

Substitute Part Grouping Explanation

Substitution for the SN74HC14PWT is determined by the following critical parameters:

Core Functional Requirements:

Logic Type: Inverter with 6 channels
Features: Schmitt Trigger input characteristic
Package: 14-TSSOP form factor
Supply Voltage Range: 2V ~ 6V minimum
Input Logic Levels: Low 0.3V ~ 1.2V, High 1.5V ~ 4.2V
Output Current: 5.2mA minimum for both high and low states

Acceptable Variation Parameters:

Quiescent Current: Up to 20 µA (original 2 µA)
Propagation Delay: Up to 21ns at 6V, 50pF load
Operating Temperature: Extended ranges acceptable (-55°C to 125°C)
Packaging Format: Tape & Reel, Cut Tape, or Tube acceptable

Non-Substitutable Characteristics:

Parts with different logic types (e.g., 74HC04 without Schmitt trigger, 74HC05 with open drain output)
Parts with incompatible package dimensions
Parts with supply voltage ranges below 2V ~ 6V

Substitute parts are grouped into three categories: Parametric Equivalents (identical electrical specifications, different packaging), Direct Manufacturers (alternative sources with equivalent performance), and Upgrades (enhanced specifications with extended temperature ranges or improved performance metrics).

Parameter Comparison

Part Number	Manufacturer	Packaging	Quiescent Current (Max)	Propagation Delay @ 6V, 50pF	Operating Temperature	Product Status
SN74HC14PWT	Texas Instruments	Tape & Reel (TR)	2 µA	21ns	-40°C ~ 85°C	Discontinued
SN74HC14PWR	Texas Instruments	Cut Tape (CT) & Digi-Reel®	2 µA	21ns	-40°C ~ 85°C	Active
MC74HC14ADTR2G	onsemi	Tape & Reel (TR)	1 µA	13ns	-55°C ~ 125°C	Active
74HC14PW,118	Nexperia USA Inc.	Cut Tape (CT) & Digi-Reel®	2 µA	21ns	-40°C ~ 125°C	Active
MM74HC14MTC	onsemi	Tube	2 µA	21ns	-55°C ~ 125°C	Active
MM74HC14MTCX	onsemi	Cut Tape (CT) & Digi-Reel®	2 µA	21ns	-55°C ~ 125°C	Active
74HC14T14-13	Diodes Incorporated	Tape & Reel (TR)	20 µA	21ns	-40°C ~ 125°C	Active
M74HC14YTTR	STMicroelectronics	Tape & Reel (TR)	1 µA	21ns	-40°C ~ 125°C	Active
MC74HC14ADTG	onsemi	Tube	1 µA	13ns	-55°C ~ 125°C	Active

Engineering Selection Recommendations

Primary Substitute (Parametric Equivalent): SN74HC14PWR from Texas Instruments provides identical electrical specifications to the SN74HC14PWT with the only difference being packaging format (Cut Tape & Digi-Reel® versus Tape & Reel). This part maintains the original manufacturer source and is currently active in production with substantial inventory availability.

Direct Manufacturer Alternative: MC74HC14ADTR2G from onsemi offers superior performance characteristics with lower quiescent current (1 µA versus 2 µA) and faster propagation delay (13ns versus 21ns). Extended operating temperature range (-55°C to 125°C) provides additional design margin. This part is actively produced and suitable for applications requiring enhanced performance specifications.

Extended Temperature Range Options: 74HC14PW,118 from Nexperia USA Inc. and MM74HC14MTC/MM74HC14MTCX from onsemi extend the upper operating temperature limit to 125°C while maintaining electrical equivalence. These parts are appropriate for applications in elevated ambient temperature environments.

Automotive Grade Option: M74HC14YTTR from STMicroelectronics carries AEC-Q100 automotive qualification with -40°C to 125°C operating range. This part is suitable for automotive and industrial applications requiring qualification documentation.

Diodes Incorporated Source: 74HC14T14-13 from Diodes Incorporated maintains full electrical compatibility with higher quiescent current specification (20 µA maximum). This part is suitable for applications where quiescent current is not a critical design parameter.

All substitute parts maintain ROHS3 compliance, MSL 1 rating, and identical 14-TSSOP package dimensions. Selection should be based on packaging format requirements, temperature range specifications, and manufacturer source preferences.

Frequently Asked Questions (FAQ)

Q: Can I substitute SN74HC14PWT with SN74HC14PWR? A: Yes. Both parts are Texas Instruments 74HC14 Schmitt trigger inverters with identical electrical specifications. The only difference is packaging format: SN74HC14PWR uses Cut Tape & Digi-Reel® while SN74HC14PWT uses Tape & Reel. Both are 14-TSSOP surface mount packages with the same pin configuration and electrical performance.

Q: What is the difference between MC74HC14ADTR2G and the original SN74HC14PWT? A: MC74HC14ADTR2G is manufactured by onsemi and offers improved specifications: lower quiescent current (1 µA versus 2 µA), faster propagation delay (13ns versus 21ns), and extended operating temperature range (-55°C to 125°C versus -40°C to 85°C). All other electrical parameters remain compatible. This part is suitable as a direct upgrade.

Q: Are 74HC04 and 74HC05 substitutes for the SN74HC14PWT? A: No. While 74HC04T14-13 and 74HC05T14-13 are 6-channel inverters in 14-TSSOP packages, they lack the Schmitt trigger input feature of the SN74HC14PWT. The 74HC04 is a standard inverter without hysteresis, and the 74HC05 is an open-drain inverter. These parts are not functionally equivalent and should not be used as substitutes unless the application does not require Schmitt trigger characteristics.

Q: What packaging formats are available for 74HC14 equivalents? A: Available packaging formats include Tape & Reel (TR), Cut Tape (CT) & Digi-Reel®, and Tube. All maintain the same 14-TSSOP physical dimensions (0.173" × 4.40mm width). Selection depends on assembly equipment compatibility and procurement requirements.

Q: Can I use M74HC14YTTR in non-automotive applications? A: Yes. M74HC14YTTR carries AEC-Q100 automotive qualification but is electrically compatible with all standard 74HC14 applications. The automotive qualification provides additional quality assurance documentation and extended temperature range (-40°C to 125°C), making it suitable for any application requiring these specifications.

Q: What is the maximum quiescent current I should accept in a substitute? A: The original SN74HC14PWT specifies 2 µA maximum quiescent current. Substitutes with up to 20 µA (such as 74HC14T14-13 from Diodes Incorporated) remain functionally compatible. Selection depends on application power budget requirements. For low-power applications, onsemi parts (MC74HC14ADTR2G, MC74HC14ADTG) with 1 µA quiescent current are preferred.

Q: Are all substitute parts ROHS3 compliant? A: Yes. All listed substitute parts maintain ROHS3 compliance and MSL 1 (Unlimited) moisture sensitivity rating, matching the original SN74HC14PWT specifications.

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