74HC14N Equivalent & Substitute Parts

Part Overview

The 74HC14N is a 6-channel inverter IC with Schmitt trigger inputs, manufactured by NXP USA Inc. in a 14-DIP package. This logic component is classified as obsolete, making equivalent substitute parts necessary for ongoing design support and procurement. The 74HC14 series maintains consistent functional specifications across multiple manufacturers, enabling direct substitution based on electrical and mechanical parameter alignment.

Key Parameters

Parameter	Specification
Logic Type	Inverter with Schmitt Trigger
Number of Circuits	6
Number of Inputs	1
Voltage Supply Range	2V to 6V
Current - Quiescent (Max)	2 µA
Current - Output High/Low	5.2mA / 5.2mA
Input Logic Level - Low	0.3V to 1.2V
Input Logic Level - High	1.5V to 4.2V
Max Propagation Delay	21ns @ 6V, 50pF
Operating Temperature	-40°C to 125°C
Package Type	14-DIP (0.300", 7.62mm)
Mounting Type	Through Hole
RoHS Status	ROHS3 Compliant

Substitute Part Grouping Explanation

Substitution of the 74HC14N is determined by strict equivalence in the following parameters:

Functional equivalence: All substitute parts maintain 6-channel inverter configuration with Schmitt trigger inputs
Electrical compatibility: Supply voltage range (2V to 6V), output current (5.2mA), and input logic levels must match
Package compatibility: All substitutes use 14-DIP through-hole packaging with identical pin configuration
Propagation delay: Maximum delay specifications must not exceed 23ns @ 6V, 50pF
Compliance: All substitutes maintain ROHS3 compliance and EAR99 classification

The three qualified substitutes (CD74HC14E, SN74HC14N, TC74HC14APF) meet these criteria while offering improved product status or enhanced specifications.

Parameter Comparison

Parameter	74HC14N (NXP)	CD74HC14E (TI)	SN74HC14N (TI)	TC74HC14APF (Toshiba)
Manufacturer	NXP USA Inc.	Texas Instruments	Texas Instruments	Toshiba Semiconductor
Product Status	Obsolete	Active	Active	Active
Voltage Supply	2V to 6V	2V to 6V	2V to 6V	2V to 6V
Quiescent Current (Max)	2 µA	2 µA	2 µA	1 µA
Output Current High/Low	5.2mA / 5.2mA	5.2mA / 5.2mA	5.2mA / 5.2mA	5.2mA / 5.2mA
Input Logic Level - Low	0.3V to 1.2V	0.3V to 1.2V	0.3V to 1.2V	0.3V to 1.5V
Input Logic Level - High	1.5V to 4.2V	1.5V to 4.2V	1.5V to 4.2V	1.5V to 4.2V
Max Propagation Delay @ 6V, 50pF	21ns	23ns	21ns	21ns
Operating Temperature	-40°C to 125°C	-55°C to 125°C	-40°C to 85°C	-40°C to 85°C
Package	14-DIP	14-PDIP	14-PDIP	14-DIP
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant

Engineering Selection Recommendations

CD74HC14E (Texas Instruments) is suitable for applications requiring extended low-temperature operation (-55°C minimum). This part offers the widest operating temperature range and maintains active product status with high inventory availability (16,300 units). Propagation delay is 23ns, within acceptable tolerance for most 74HC14 applications.

SN74HC14N (Texas Instruments) provides direct electrical and timing equivalence to the original 74HC14N, with identical 21ns propagation delay and matching quiescent current specifications. This part is recommended for designs with strict timing requirements and is actively manufactured by a major supplier.

TC74HC14APF (Toshiba Semiconductor) delivers superior quiescent current performance (1 µA versus 2 µA), reducing power consumption in battery-powered or low-power applications. This part maintains 21ns propagation delay and active product status. Input logic level low specification extends to 1.5V, providing broader input threshold tolerance.

All three substitutes maintain ROHS3 compliance, EAR99 classification, and identical pin configuration for direct board-level replacement.

Frequently Asked Questions (FAQ)

Q: Can the 74HC14N be directly replaced with any of these substitutes?

A: Yes. All three substitute parts (CD74HC14E, SN74HC14N, TC74HC14APF) share identical pin configuration, package dimensions (14-DIP, 0.300" spacing), and core electrical specifications (supply voltage, output current, input logic levels). Direct socket substitution is supported.

Q: What is the difference between 14-DIP and 14-PDIP packaging?

A: Both designations refer to 14-pin dual-in-line packages with 0.300" (7.62mm) row spacing. The "P" in PDIP indicates plastic material. All parts in this comparison use physically identical 14-DIP packages and are mechanically interchangeable.

Q: Which substitute should I select for low-power applications?

A: The TC74HC14APF offers the lowest quiescent current at 1 µA maximum, compared to 2 µA for the other options. This reduces standby power consumption and is beneficial for battery-powered designs.

Q: Are there temperature range considerations for substitution?

A: The original 74HC14N operates to 125°C maximum. The CD74HC14E extends the low-temperature limit to -55°C, while SN74HC14N and TC74HC14APF are rated to -40°C minimum and 85°C maximum. Select based on your application's temperature requirements.

Q: Do all substitutes meet the same compliance standards?

A: Yes. All four parts (original and substitutes) are ROHS3 compliant, REACH unaffected, and classified as EAR99 for export control purposes. Moisture sensitivity level is 1 (unlimited) for the original and TC74HC14APF; not applicable for Texas Instruments parts.

Q: What is the propagation delay difference between parts?

A: The original 74HC14N and both Texas Instruments parts (SN74HC14N) specify 21ns maximum propagation delay at 6V with 50pF load. The CD74HC14E specifies 23ns, a 2ns difference that is typically negligible for most logic applications but should be verified for timing-critical designs.

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