MM74HCT14MTCX Equivalent & Substitute Parts

Part Overview

The MM74HCT14MTCX is a 6-channel inverter IC with Schmitt trigger inputs manufactured by onsemi in 14-TSSOP surface mount packaging. This logic component operates at 4.5V to 5.5V supply voltage and is designed for digital signal inversion applications requiring hysteresis input characteristics. The part is currently active in production. Equivalent and substitute parts are identified based on matching functional specifications, electrical parameters, and package compatibility to support design flexibility and supply chain continuity.

Key Parameters

Parameter	Value
Manufacturer Part Number	MM74HCT14MTCX
Manufacturer	onsemi
Logic Type	Inverter
Number of Circuits	6
Number of Inputs	1
Features	Schmitt Trigger
Voltage - Supply	4.5V ~ 5.5V
Current - Quiescent (Max)	1 µA
Current - Output High, Low	4.8mA, 4.8mA
Input Logic Level - Low	0.5V ~ 0.6V
Input Logic Level - High	1.9V ~ 2.1V
Max Propagation Delay @ V, Max CL	20ns @ 5V, 50pF
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

Substitute parts for the MM74HCT14MTCX are classified based on the following substitution criteria:

Primary Substitution Parameters:

Logic type: Inverter with 6 channels and Schmitt trigger input
Supply voltage range: 4.5V ~ 5.5V (HCT series specification)
Package type: 14-TSSOP surface mount
Input/output logic levels: Low 0.5V ~ 0.6V, High 1.9V ~ 2.1V
Quiescent current: Maximum 1 µA to 2 µA
Output drive current: 4mA to 4.8mA per channel
Propagation delay: 20ns to 38ns @ 5V, 50pF load
Operating temperature range: Minimum -40°C, maximum 85°C or higher
RoHS3 compliance and MSL Level 1

Grouping Logic: Parts are grouped as direct substitutes when all primary parameters fall within the specified ranges. Parts with identical base product number (74HCT14) and matching electrical characteristics are considered equivalent. Packaging variants (Cut Tape vs. Tape & Reel) do not affect functional substitutability but may affect procurement and handling.

Parameter Comparison

Part Number	Manufacturer	Supply Voltage	Quiescent Current (Max)	Output Current (High/Low)	Propagation Delay @ 5V	Operating Temp	Package	Status
MM74HCT14MTCX	onsemi	4.5V ~ 5.5V	1 µA	4.8mA / 4.8mA	20ns	-40°C ~ 85°C	14-TSSOP	Active
MC74HCT14ADTR2G	onsemi	4.5V ~ 5.5V	1 µA	4mA / 4mA	32ns	-55°C ~ 125°C	14-TSSOP	Active
74HCT14T14-13	Diodes Incorporated	4.5V ~ 5.5V	20 µA	4mA / 4mA	34ns	-40°C ~ 125°C	14-TSSOP	Active
74HCT14PW,118	Nexperia USA Inc.	4.5V ~ 5.5V	2 µA	4mA / 4mA	34ns	-40°C ~ 125°C	14-TSSOP	Active
CD74HCT14PW	Texas Instruments	4.5V ~ 5.5V	2 µA	4mA / 4mA	38ns	-55°C ~ 125°C	14-TSSOP	Discontinued at DiGi Electronics
CD74HCT14PWR	Texas Instruments	4.5V ~ 5.5V	2 µA	4mA / 4mA	38ns	-55°C ~ 125°C	14-TSSOP	Active
SN74HCT14DBR	Texas Instruments	4.5V ~ 5.5V	2 µA	4mA / 4mA	30ns	-40°C ~ 85°C	14-SSOP	Active
SN74HCT14PWR	Texas Instruments	4.5V ~ 5.5V	2 µA	4mA / 4mA	30ns	-40°C ~ 85°C	14-TSSOP	Active
SN74HCT14PWT	Texas Instruments	4.5V ~ 5.5V	2 µA	4mA / 4mA	30ns	-40°C ~ 85°C	14-TSSOP	Discontinued at DiGi Electronics

Engineering Selection Recommendations

Active Production Parts (Recommended for New Designs):

MC74HCT14ADTR2G (onsemi): Extended operating temperature range (-55°C ~ 125°C) with identical supply voltage and logic specifications. Suitable for applications requiring wider temperature operation.
74HCT14PW,118 (Nexperia USA Inc.): Direct functional equivalent with active production status and extended temperature range.
CD74HCT14PWR (Texas Instruments): Active production status with extended temperature range and established supply availability.
SN74HCT14PWR (Texas Instruments): Active production with matching operating temperature to the main part and proven reliability.

Discontinued Parts (Not Recommended for New Designs):

CD74HCT14PW (Texas Instruments): Discontinued at DiGi Electronics; use CD74HCT14PWR as replacement.
SN74HCT14PWT (Texas Instruments): Discontinued at DiGi Electronics; use SN74HCT14PWR as replacement.

Package Consideration:

SN74HCT14DBR uses 14-SSOP package (0.209", 5.30mm width) instead of 14-TSSOP (0.173", 4.40mm width). This package difference requires PCB layout verification before substitution.

All substitute parts maintain RoHS3 compliance and MSL Level 1 rating consistent with the main part.

Frequently Asked Questions (FAQ)

Q: Can MC74HCT14ADTR2G replace MM74HCT14MTCX directly? A: Yes. Both parts share identical supply voltage (4.5V ~ 5.5V), logic levels, and 14-TSSOP package. MC74HCT14ADTR2G offers extended operating temperature range (-55°C ~ 125°C vs. -40°C ~ 85°C) and is suitable for applications requiring wider temperature operation.

Q: What is the difference between 74HCT and 74HC series? A: The MM74HCT14MTCX operates at 4.5V ~ 5.5V (HCT series). The 74HC series operates at 2V ~ 6V with different input logic levels. These are not interchangeable without circuit redesign.

Q: Does packaging type (Cut Tape vs. Tape & Reel) affect functionality? A: No. Cut Tape (CT) and Tape & Reel (TR) packaging variants contain identical die and electrical specifications. The difference is in handling and procurement format only.

Q: Why does SN74HCT14DBR have a different package designation (14-SSOP vs. 14-TSSOP)? A: SN74HCT14DBR uses 14-SSOP (0.209" width) while MM74HCT14MTCX uses 14-TSSOP (0.173" width). These packages have different pin spacing and footprints. PCB layout verification is required before substitution.

Q: Are all substitute parts RoHS3 compliant? A: Yes. All listed substitute parts maintain RoHS3 compliance and MSL Level 1 rating, matching the environmental and regulatory status of the main part.

Q: What is the significance of quiescent current differences (1 µA vs. 20 µA)? A: Quiescent current represents standby power consumption. The 74HCT14T14-13 specifies 20 µA maximum, which is higher than other parts. For battery-powered or low-power applications, parts with lower quiescent current (1 µA to 2 µA) are preferred.

Q: Can I use CD74HCT14PW as a replacement? A: CD74HCT14PW is discontinued at DiGi Electronics. Use CD74HCT14PWR (active production) as the replacement. Both are Texas Instruments products with identical electrical specifications.

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