SN74AC14DBR Equivalent & Substitute Parts

Part Overview

The SN74AC14DBR is a 6-channel inverter IC with Schmitt trigger inputs manufactured by Texas Instruments in a 14-SSOP surface mount package. This logic component is designed for signal inversion applications requiring hysteresis input characteristics. The part is currently in active production status with 2200 units available in inventory. Substitute parts are identified when equivalent functional performance can be maintained across the same logic family while accommodating different package geometries or minor parameter variations within acceptable engineering tolerances.

Substiute Parts

SN74AC14DBR

Texas InstrumentsIn Stock: 2264SN74AC14DBR Datasheet

Current PartRFQ

74AC14MTCX

onsemiIn Stock: 131474AC14MTCX Datasheet

MFR RecommendedRFQ

MC74AC14DTR2G

onsemiIn Stock: 3160MC74AC14DTR2G Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the SN74AC14DBR are qualified based on the following criteria:

Functional Equivalence: All substitute parts maintain identical logic function (6-channel inverter with Schmitt trigger), circuit count, input count, and supply voltage range (2V ~ 6V).

Electrical Performance: Substitute parts operate within the same temperature range (-40°C ~ 85°C) and maintain compatible propagation delay specifications (10ns @ 5V, 50pF maximum).

Package Compatibility: Substitute parts use alternative surface mount packages (14-TSSOP) that are functionally interchangeable with the original 14-SSOP package, with differences limited to physical dimensions and lead pitch.

Compliance & Status: All substitute parts maintain active product status, ROHS3 compliance, and identical regulatory classifications (ECCN: EAR99, HTSUS: 8542.39.0001).

Manufacturer Availability: Substitute parts are sourced from onsemi, a qualified manufacturer within the 74AC logic family ecosystem.

Parameter Comparison

Engineering Selection Recommendations

Primary Selection (SN74AC14DBR): Recommended when 14-SSOP package footprint is specified in the original design. Texas Instruments sourcing provides established supply chain continuity for this configuration.

Alternative Selection (74AC14MTCX): Suitable for designs that can accommodate 14-TSSOP package geometry. This onsemi variant maintains identical quiescent current specification (2 µA) and is functionally equivalent to the primary part. Package width reduction from 5.30mm to 4.40mm may provide PCB layout advantages in space-constrained applications.

Alternative Selection (MC74AC14DTR2G): Functionally compatible with the primary part across all critical parameters. Quiescent current specification is 4 µA maximum, which remains within acceptable operating margins for most 74AC logic applications. The 14-TSSOP package offers the same dimensional benefits as 74AC14MTCX. Highest inventory availability (3094 units) supports rapid procurement.

All three parts maintain active product status, full ROHS3 compliance, and identical regulatory classifications, ensuring compatibility with current manufacturing and environmental standards.

Frequently Asked Questions (FAQ)

Q: Can 74AC14MTCX and MC74AC14DTR2G be used interchangeably with SN74AC14DBR?

A: Yes, both onsemi parts are functionally equivalent substitutes. The primary difference is package type: SN74AC14DBR uses 14-SSOP while both substitutes use 14-TSSOP. PCB footprints must be verified for compatibility. Quiescent current differs slightly in MC74AC14DTR2G (4 µA vs. 2 µA), but remains within acceptable operating parameters for 74AC logic applications.

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

A: Both are 14-pin surface mount packages with identical pin counts and pitch. The primary difference is package width: 14-SSOP measures 5.30mm while 14-TSSOP measures 4.40mm. Lead configuration and thermal characteristics may also differ. PCB layout and footprint compatibility must be verified before substitution.

Q: Are there any electrical performance differences between the three parts?

A: All three parts maintain identical logic function, supply voltage range (2V ~ 6V), input/output logic levels, and propagation delay (10ns @ 5V, 50pF). MC74AC14DTR2G specifies maximum quiescent current of 4 µA compared to 2 µA for the other two parts. This difference does not affect functional compatibility in standard 74AC logic applications.

Q: Which substitute part should be selected for new designs?

A: Selection depends on package availability and PCB layout requirements. If 14-TSSOP package is acceptable, both onsemi parts are suitable. MC74AC14DTR2G offers highest inventory availability (3094 units). If 14-SSOP package is required, SN74AC14DBR remains the primary choice.

Q: Are all three parts RoHS compliant?

A: Yes, all three parts are ROHS3 compliant with MSL rating of 1 (Unlimited). REACH status is identical across all parts (REACH Unaffected). All parts meet current environmental and regulatory requirements.