SN74HC14APW Equivalent & Substitute Parts

Part Overview

The SN74HC14APW is a 6-channel inverter IC with Schmitt trigger inputs manufactured by Texas Instruments in the 74HC logic series. This device is classified as discontinued at DiGi Electronics, necessitating identification of equivalent and substitute components for ongoing design requirements and procurement needs. The part operates across a 2V to 6V supply voltage range and is housed in a 14-TSSOP surface mount package. Equivalent alternatives are available to maintain design continuity and ensure component availability.

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	5.2mA, 5.2mA
Max Propagation Delay @ V, Max CL	19ns @ 6V, 50pF
Operating Temperature	-40°C ~ 85°C
Mounting Type	Surface Mount
Package / Case	14-TSSOP (0.173", 4.40mm Width)
RoHS Status	ROHS3 Compliant

Substitute Part Grouping Explanation

Substitution of the SN74HC14APW is determined by the following critical parameters:

Functional Equivalence Criteria:

Logic type (Inverter)
Number of circuits (6 channels)
Schmitt trigger feature presence
Package type (14-TSSOP surface mount)
RoHS3 compliance

Electrical Compatibility Criteria:

Supply voltage range overlap with 2V ~ 6V
Quiescent current specifications
Output current drive capability
Propagation delay performance
Operating temperature range

Two substitute categories are identified:

Category 1: Parametric Equivalent — SN74HC14APW-P maintains identical electrical specifications and input/output characteristics, differing only in product status (Active vs. Discontinued).

Category 2: Functional Substitute — SN74AHC14PWR provides equivalent inverter functionality with 6 Schmitt trigger channels in the same 14-TSSOP package but operates within a narrower supply voltage range (2V ~ 5.5V) and exhibits different electrical characteristics including higher output current drive and faster propagation delay.

Parameter Comparison

Parameter	SN74HC14APW (Main)	SN74HC14APW-P (Parametric Equivalent)	SN74AHC14PWR (Functional Substitute)
Manufacturer	Texas Instruments	Texas Instruments	Texas Instruments
Series	74HC	74HC	74AHC
Logic Type	Inverter	Inverter	Inverter
Number of Circuits	6	6	6
Features	Schmitt Trigger	Schmitt Trigger	Schmitt Trigger
Voltage - Supply	2V ~ 6V	2V ~ 6V	2V ~ 5.5V
Current - Quiescent (Max)	2 µA	2 µA	2 µA
Current - Output High, Low	5.2mA, 5.2mA	5.2mA, 5.2mA	8mA, 8mA
Max Propagation Delay @ V, Max CL	19ns @ 6V, 50pF	19ns @ 6V, 50pF	10.6ns @ 5V, 50pF
Operating Temperature	-40°C ~ 85°C	-40°C ~ 85°C	-40°C ~ 125°C
Mounting Type	Surface Mount	Surface Mount	Surface Mount
Package / Case	14-TSSOP	14-TSSOP	14-TSSOP
Product Status	Discontinued at DiGi Electronics	Active	Active
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant

Engineering Selection Recommendations

SN74HC14APW-P (Parametric Equivalent): This part is the primary substitute for the discontinued SN74HC14APW. It maintains identical electrical specifications, input/output logic levels, propagation delay, and operating temperature range. The part is currently Active in product status and carries ROHS3 compliance with unlimited moisture sensitivity level (MSL 1). Selection of SN74HC14APW-P provides direct functional replacement with no design modifications required.

SN74AHC14PWR (Functional Substitute): This part provides equivalent inverter functionality with 6 Schmitt trigger channels in the same 14-TSSOP package. The SN74AHC14PWR operates within a reduced supply voltage range (2V ~ 5.5V versus 2V ~ 6V) and exhibits enhanced electrical performance with higher output current drive (8mA versus 5.2mA) and faster propagation delay (10.6ns versus 19ns). The extended operating temperature range (-40°C ~ 125°C) provides additional thermal margin. This substitute is suitable for applications where the maximum supply voltage does not exceed 5.5V and where improved speed performance is beneficial. The part is Active in product status with ROHS3 compliance and MSL 1 rating.

Selection between these substitutes depends on supply voltage requirements and performance specifications of the target application.

Frequently Asked Questions (FAQ)

Q: Can SN74HC14APW-P be used as a direct replacement for SN74HC14APW?

A: Yes. SN74HC14APW-P is a parametric equivalent with identical electrical specifications, logic levels, propagation delay, and operating temperature range. No design modifications are required for direct substitution.

Q: What are the key differences between SN74HC14APW and SN74AHC14PWR?

A: The primary differences are: (1) Supply voltage range — SN74AHC14PWR operates at 2V ~ 5.5V versus 2V ~ 6V for SN74HC14APW; (2) Output current drive — SN74AHC14PWR provides 8mA versus 5.2mA; (3) Propagation delay — SN74AHC14PWR is faster at 10.6ns versus 19ns; (4) Operating temperature — SN74AHC14PWR extends to 125°C versus 85°C. Both devices are 6-channel inverters with Schmitt triggers in 14-TSSOP packages.

Q: Can SN74AHC14PWR be used in applications requiring 6V supply voltage?

A: No. SN74AHC14PWR is specified for a maximum supply voltage of 5.5V. Applications requiring 6V operation must use SN74HC14APW or SN74HC14APW-P.

Q: Are all three parts RoHS3 compliant?

A: Yes. SN74HC14APW, SN74HC14APW-P, and SN74AHC14PWR are all ROHS3 compliant.

Q: What is the package compatibility between these parts?

A: All three parts use the 14-TSSOP surface mount package with identical dimensions (0.173" × 4.40mm width). They are mechanically and electrically compatible at the package level.

Q: Which substitute should be selected for new designs?

A: For new designs, SN74HC14APW-P is recommended as the primary choice due to its Active product status and identical electrical specifications to the original SN74HC14APW. SN74AHC14PWR is suitable for applications where supply voltage does not exceed 5.5V and where improved speed performance is advantageous.

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