74AC14MTC Equivalent & Substitute Parts

Part Overview

The 74AC14MTC is a 6-channel inverter IC with Schmitt trigger inputs manufactured by onsemi in a 14-TSSOP surface mount package. This logic component is classified as obsolete, making equivalent and substitute parts necessary for ongoing design support and production continuity. The part operates across a 2V to 6V supply voltage range with Schmitt trigger input conditioning suitable for noise-immune signal inversion applications.

Substiute Parts

74AC14MTC

onsemiIn Stock: 235874AC14MTC Datasheet

Current PartRFQ

MC74AC14DTR2G

onsemiIn Stock: 3160MC74AC14DTR2G Datasheet

DirectRFQ

SN74AC14PWR

Texas InstrumentsIn Stock: 2041SN74AC14PWR Datasheet

DirectRFQ

SN74AC14QPWRQ1

Texas InstrumentsIn Stock: 4980SN74AC14QPWRQ1 Datasheet

UpgradeRFQ

SN74AC14DBR

Texas InstrumentsIn Stock: 2264SN74AC14DBR Datasheet

SimilarRFQ

SN74AC14PW

Texas InstrumentsIn Stock: 3126SN74AC14PW Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the 74AC14MTC is determined by strict equivalence across the following electrical and mechanical parameters:

• Logic function: 6-channel inverter with Schmitt trigger
• Supply voltage range: 2V ~ 6V
• Output drive capability: 24mA high and low
• Input logic thresholds: 0.5V ~ 1.1V (low), 2.2V ~ 3.9V (high)
• Propagation delay: 10ns maximum at 5V, 50pF load
• Package compatibility: 14-TSSOP or 14-SSOP surface mount
• Compliance: ROHS3, MSL 1

Substitute parts are grouped by their relationship to the main part:

Direct Manufacturer Equivalents maintain identical electrical specifications and packaging, differing only in manufacturer or packaging format (tape & reel, cut tape, tube).

Upgrade Parts provide identical electrical performance with extended operating temperature range or automotive qualification, enabling use in more demanding applications.

Similar Parts use alternative but compatible packaging (14-SSOP vs. 14-TSSOP) with identical electrical characteristics, suitable where PCB footprint accommodation permits.

Parametric Equivalents match all critical electrical parameters with discontinued availability status, requiring verification of supply chain viability.

Parameter Comparison

Engineering Selection Recommendations

For Standard Applications (-40°C to 85°C):

MC74AC14DTR2G (onsemi) and SN74AC14PWR (Texas Instruments) are active production alternatives with identical electrical specifications. MC74AC14DTR2G carries a maximum quiescent current of 4 µA compared to the 2 µA specification of the original part; this difference remains within typical application tolerances for logic-level signal inversion. Both parts maintain ROHS3 compliance and MSL 1 rating.

For Extended Temperature Applications (-40°C to 125°C):

SN74AC14QPWRQ1 (Texas Instruments) extends the operating temperature range to 125°C and carries AEC-Q100 automotive qualification. This part is suitable for applications requiring enhanced thermal performance or automotive-grade reliability.

For Alternative Packaging:

SN74AC14DBR (Texas Instruments) uses a 14-SSOP package (0.209", 5.30mm width) instead of the 14-TSSOP package (0.173", 4.40mm width). This part is electrically equivalent but requires PCB footprint modification. Selection depends on available board space and design flexibility.

For Supply Chain Continuity:

SN74AC14PW (Texas Instruments) is discontinued at DiGi Electronics but remains available through alternative distribution channels. This part matches all electrical parameters of the original 74AC14MTC and is suitable where supply can be secured through secondary sources.

Frequently Asked Questions (FAQ)

Q: Can MC74AC14DTR2G replace 74AC14MTC directly?

A: Yes. MC74AC14DTR2G is electrically equivalent with identical logic function, supply voltage range, output drive capability, and propagation delay. The quiescent current specification is 4 µA maximum versus 2 µA for the original part. This difference does not affect functional compatibility in standard applications. Both parts use the same 14-TSSOP package.

Q: What is the difference between 14-TSSOP and 14-SSOP packages?

A: Both are surface mount packages with 14 pins. The 14-TSSOP measures 0.173" (4.40mm) in width, while the 14-SSOP measures 0.209" (5.30mm) in width. PCB footprints are not interchangeable without design modification. SN74AC14DBR uses the wider 14-SSOP package and requires a different PCB layout.

Q: Is SN74AC14QPWRQ1 suitable for non-automotive applications?

A: Yes. SN74AC14QPWRQ1 is AEC-Q100 qualified and rated to -40°C to 125°C, making it suitable for any application within this temperature range. The automotive qualification does not restrict use in standard industrial or commercial designs.

Q: Why is the quiescent current different in MC74AC14DTR2G?

A: MC74AC14DTR2G specifies a maximum quiescent current of 4 µA compared to 2 µA for the original 74AC14MTC. This represents a manufacturing tolerance variation within the 74AC14 logic family. Both values are acceptable for inverter logic applications where quiescent current is typically negligible relative to switching current.

Q: Can I use SN74AC14PW if it is discontinued at DiGi Electronics?

A: SN74AC14PW remains available through alternative electronics distributors despite discontinuation at DiGi Electronics. Verify current availability and lead times through secondary distribution channels before committing to this part for new designs.

Q: Are all substitute parts ROHS3 compliant?

A: Yes. All listed substitute parts carry ROHS3 compliance and MSL 1 (unlimited moisture sensitivity level) rating, matching the environmental and regulatory status of the original 74AC14MTC.