MM74HC14SJ Equivalent & Substitute Parts

Part Overview

The MM74HC14SJ is a 6-channel inverter IC with Schmitt trigger inputs manufactured by onsemi in a 14-SOP package. This device is classified as obsolete, making equivalent substitute parts necessary for ongoing production and maintenance applications. The MM74HC14SJ operates across a 2V to 6V supply voltage range with Schmitt trigger functionality for noise immunity in digital logic applications.

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	-55°C ~ 125°C
Mounting Type	Surface Mount
Package / Case	14-SOIC (0.209", 5.30mm Width)
Moisture Sensitivity Level (MSL)	1 (Unlimited)

Substitute Part Grouping Explanation

Substitute parts for the MM74HC14SJ are qualified based on the following criteria:

Core Functional Parameters:

Logic Type: Inverter with 6 channels, 1 input per channel
Schmitt Trigger feature presence
Supply voltage range: 2V ~ 6V
Quiescent current: 2 µA maximum
Output current capability: 5.2mA high and low
Input logic levels: Low 0.3V ~ 1.2V, High 1.5V ~ 4.2V
Propagation delay: 21ns or 23ns @ 6V, 50pF load

Package Compatibility:

Surface mount technology
14-pin SOIC package (pin-compatible)
Package width variations: 0.154" (3.90mm) or 0.209" (5.30mm)

Electrical Performance:

Operating temperature range: -40°C ~ 125°C or -55°C ~ 125°C
Moisture sensitivity: MSL 1 (Unlimited)

Substitutes are grouped by package width and operating temperature range. Parts with identical electrical specifications and compatible pinouts are direct substitutes.

Parameter Comparison

Part Number	Manufacturer	Product Status	Package / Case	Operating Temp	Propagation Delay	RoHS Status
MM74HC14SJ	onsemi	Obsolete	14-SOIC (0.209", 5.30mm)	-55°C ~ 125°C	21ns @ 6V, 50pF	REACH Unaffected
74HC14D	Nexperia USA Inc.	Active	14-SOIC (0.154", 3.90mm)	-40°C ~ 125°C	21ns @ 6V, 50pF	ROHS3 Compliant
CD74HC14M	Texas Instruments	Discontinued at DiGi Electronics	14-SOIC (0.154", 3.90mm)	-55°C ~ 125°C	23ns @ 6V, 50pF	ROHS3 Compliant
CD74HC14M96	Texas Instruments	Active	14-SOIC (0.154", 3.90mm)	-55°C ~ 125°C	23ns @ 6V, 50pF	ROHS3 Compliant
CD74HC14MT	Texas Instruments	Obsolete	14-SOIC (0.154", 3.90mm)	-55°C ~ 125°C	23ns @ 6V, 50pF	ROHS3 Compliant
SN74HC14D	Texas Instruments	Discontinued at DiGi Electronics	14-SOIC (0.154", 3.90mm)	-40°C ~ 85°C	21ns @ 6V, 50pF	ROHS3 Compliant
SN74HC14DE4	Texas Instruments	Discontinued at DiGi Electronics	14-SOIC (0.154", 3.90mm)	-40°C ~ 85°C	21ns @ 6V, 50pF	ROHS3 Compliant
SN74HC14DG4	Texas Instruments	Active	14-SOIC (0.154", 3.90mm)	-40°C ~ 85°C	21ns @ 6V, 50pF	ROHS3 Compliant
SN74HC14DR	Texas Instruments	Active	14-SOIC (0.154", 3.90mm)	-40°C ~ 85°C	21ns @ 6V, 50pF	ROHS3 Compliant
SN74HC14DT	Texas Instruments	Discontinued at DiGi Electronics	14-SOIC (0.154", 3.90mm)	-40°C ~ 85°C	21ns @ 6V, 50pF	ROHS3 Compliant
SN74HC14NSR	Texas Instruments	Active	14-SOIC (0.209", 5.30mm)	-40°C ~ 85°C	21ns @ 6V, 50pF	ROHS3 Compliant

Engineering Selection Recommendations

Primary Substitutes (Active Status, Full Temperature Range):

CD74HC14M96 (Texas Instruments) is the preferred substitute for applications requiring the full -55°C ~ 125°C operating temperature range. This part maintains electrical equivalence with 23ns propagation delay and is currently in active production with ROHS3 compliance.

Secondary Substitutes (Active Status, Limited Temperature Range):

SN74HC14DG4 and SN74HC14DR (Texas Instruments) are active alternatives with -40°C ~ 85°C operating range. Both deliver 21ns propagation delay matching the MM74HC14SJ specification. SN74HC14DR is available in cut tape and digi-reel packaging.

Package Consideration:

SN74HC14NSR maintains the 0.209" (5.30mm) package width matching the MM74HC14SJ footprint. This part is active and suitable for applications where PCB layout constraints require the wider package format.

Compliance Status:

All listed substitutes carry ROHS3 compliance and REACH unaffected status, meeting modern environmental and regulatory requirements.

Frequently Asked Questions (FAQ)

Q: Can I use a substitute part with a different operating temperature range?

A: Temperature range substitution depends on your application requirements. If your circuit operates within -40°C ~ 85°C, parts like SN74HC14DG4 or SN74HC14DR are suitable. For applications requiring -55°C ~ 125°C operation, CD74HC14M96 is required.

Q: What is the difference between 21ns and 23ns propagation delay?

A: Both delays meet the 74HC14 logic family specification. The 2ns difference is within typical manufacturing tolerance and does not affect functional compatibility in standard digital logic applications. Verify timing-critical designs against your specific requirements.

Q: Are the different package widths (0.154" vs 0.209") pin-compatible?

A: Yes, both 14-SOIC package widths are electrically and functionally pin-compatible. The width difference affects PCB footprint only. Verify your PCB layout accommodates the selected package width before substitution.

Q: Which substitute has the best availability?

A: SN74HC14DR and SN74HC14DG4 are active production parts from Texas Instruments with substantial inventory. CD74HC14M96 is also active with high stock levels.

Q: Do all substitutes meet RoHS compliance?

A: Yes, all listed substitutes carry ROHS3 compliance certification, meeting current environmental standards.

Q: Can I substitute based on packaging format alone?

A: No. Packaging format (tube, tape & reel, cut tape) affects handling and storage but does not determine electrical compatibility. Select substitutes based on electrical parameters and operating temperature requirements first, then choose the appropriate packaging format for your procurement process.

Request Quote (Ships tomorrow)

Part Number

Quantity

Company

Contact Name

E-mail

Message