SN74HC14APWR Equivalent & Substitute Parts

Part Overview

The SN74HC14APWR is a 6-channel inverter IC with Schmitt trigger inputs in a 14-TSSOP surface mount package, manufactured by Texas Instruments. This logic component is classified as obsolete, making equivalent substitute parts necessary for new designs and production continuity. The part operates across a 2V to 6V supply voltage range and is suitable for digital signal inversion applications 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	19ns
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 of the SN74HC14APWR is determined by strict equivalence in the following parameters:

Logic Function: All substitutes must be 6-channel inverters with Schmitt trigger inputs
Package: All substitutes must use 14-TSSOP surface mount packaging with identical pin configuration
Electrical Specifications: Supply voltage range (2V ~ 6V), output current capability (5.2mA), and input logic levels must remain within specified tolerances
Propagation Delay: Maximum delay at 6V with 50pF load must not exceed 21ns to maintain timing compatibility
Operating Temperature: Minimum operating range of -40°C to 85°C required; extended range acceptable
Compliance: RoHS3 compliance and MSL Level 1 required for all substitutes

The three substitute parts listed below meet these criteria while offering active product status and improved availability compared to the obsolete SN74HC14APWR.

Parameter Comparison

Parameter	SN74HC14APWR (Main)	SN74HC14PWR	74HC14T14-13	M74HC14YTTR
Manufacturer	Texas Instruments	Texas Instruments	Diodes Incorporated	STMicroelectronics
Product Status	Obsolete	Active	Active	Active
Logic Type	Inverter	Inverter	Inverter	Inverter
Number of Circuits	6	6	6	6
Voltage - Supply	2V ~ 6V	2V ~ 6V	2V ~ 6V	2V ~ 6V
Current - Quiescent (Max)	2 µA	2 µA	20 µA	1 µA
Current - Output High, Low	5.2mA, 5.2mA	5.2mA, 5.2mA	5.2mA, 5.2mA	5.2mA, 5.2mA
Input Logic Level - Low	0.3V ~ 1.2V	0.3V ~ 1.2V	0.3V ~ 1.2V	0.3V ~ 1.5V
Input Logic Level - High	1.5V ~ 4.2V	1.5V ~ 4.2V	1.5V ~ 4.2V	1.5V ~ 4.2V
Max Propagation Delay @ 6V, 50pF	19ns	21ns	21ns	21ns
Operating Temperature	-40°C ~ 85°C	-40°C ~ 85°C	-40°C ~ 125°C	-40°C ~ 125°C
Package / Case	14-TSSOP	14-TSSOP	14-TSSOP	14-TSSOP
Mounting Type	Surface Mount	Surface Mount	Surface Mount	Surface Mount
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
MSL	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)

Engineering Selection Recommendations

SN74HC14PWR (Texas Instruments) is the primary direct substitute, maintaining identical electrical specifications and operating temperature range as the SN74HC14APWR while offering active product status and significantly higher inventory availability. This part is recommended for applications requiring exact parameter matching and continued Texas Instruments supply chain support.

74HC14T14-13 (Diodes Incorporated) provides functional equivalence with extended operating temperature range (-40°C to 125°C) and identical propagation delay characteristics. The quiescent current specification of 20 µA is higher than the main part but remains within acceptable limits for most applications. This substitute is suitable for designs requiring extended temperature operation.

M74HC14YTTR (STMicroelectronics) offers the lowest quiescent current (1 µA) and includes automotive-grade qualification (AEC-Q100) with extended temperature range (-40°C to 125°C). The input logic level low specification extends to 1.5V, providing broader input threshold tolerance. This part is specified for automotive and industrial applications requiring enhanced reliability certification.

All three substitutes maintain identical package geometry, pin configuration, and core logic function, ensuring direct PCB compatibility without layout modifications.

Frequently Asked Questions (FAQ)

Q: Can SN74HC14PWR be used as a direct replacement for SN74HC14APWR?

A: Yes. SN74HC14PWR is functionally and electrically equivalent to SN74HC14APWR. Both parts share identical supply voltage range, output current capability, input logic levels, and propagation delay specifications. The primary difference is product status: SN74HC14PWR is active with higher inventory availability.

Q: What is the difference in quiescent current between the substitutes?

A: The main part and SN74HC14PWR specify 2 µA maximum quiescent current. The 74HC14T14-13 specifies 20 µA, while M74HC14YTTR specifies 1 µA. For low-power applications, M74HC14YTTR offers superior performance. For standard applications, all three remain within acceptable power consumption parameters.

Q: Are all substitutes compatible with the same PCB layout?

A: Yes. All substitutes use identical 14-TSSOP packaging with matching pin assignments. No PCB layout modifications are required for substitution.

Q: Which substitute is recommended for automotive applications?

A: M74HC14YTTR is specified for automotive use with AEC-Q100 qualification and extended operating temperature range (-40°C to 125°C). This part is the appropriate selection for automotive and mission-critical industrial designs.

Q: What is the maximum propagation delay difference between the main part and substitutes?

A: The SN74HC14APWR specifies 19ns maximum propagation delay at 6V with 50pF load. All three substitutes specify 21ns maximum under identical conditions. This 2ns difference is negligible for most digital logic applications.

Q: Do all parts meet RoHS3 compliance requirements?

A: Yes. The main part and all three substitutes are RoHS3 compliant with MSL Level 1 (unlimited moisture sensitivity), meeting current environmental and reliability standards.

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