74ACT74MTCX Equivalent & Substitute Parts

Part Overview

The 74ACT74MTCX is a dual D-type flip-flop logic integrated circuit manufactured by onsemi in a 14-TSSOP surface mount package. This device provides two independent D-type flip-flops with set and reset functionality, operating at a maximum clock frequency of 210 MHz with 11ns propagation delay at 5V and 50pF load.

The 74ACT74MTCX is classified as obsolete. Equivalent and substitute parts are necessary to maintain design continuity and ensure component availability for new production runs, repairs, and system upgrades.

Substiute Parts

74ACT74MTCX

onsemiIn Stock: 391274ACT74MTCX Datasheet

Current PartRFQ

MC74ACT74DTR2G

onsemiIn Stock: 10251MC74ACT74DTR2G Datasheet

Parametric EquivalentRFQ

SN74ACT74PW

Texas InstrumentsIn Stock: 3149SN74ACT74PW Datasheet

DirectRFQ

SN74ACT74PWR

Texas InstrumentsIn Stock: 3913SN74ACT74PWR Datasheet

DirectRFQ

74AHCT74PW,118

NXP SemiconductorsIn Stock: 1031274AHCT74PW,118 Datasheet

SimilarRFQ

SN74ACT74DBR

Texas InstrumentsIn Stock: 5163SN74ACT74DBR Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the 74ACT74MTCX are classified based on electrical and mechanical compatibility within the following criteria:

Parametric Equivalents maintain identical or superior electrical specifications across all critical parameters: dual D-type flip-flop configuration, 2 elements with 1 bit per element, complementary output type, positive edge trigger, 210 MHz clock frequency, 11ns propagation delay at 5V/50pF, 24mA output current, 4.5V–5.5V supply voltage, -40°C to 85°C operating temperature, and 14-TSSOP package.

Direct Manufacturer Equivalents are functionally identical parts from different manufacturers (Texas Instruments) with the same base part number (74ACT74) and package, differing only in quiescent current and input capacitance specifications, which remain within acceptable operational ranges.

Similar Parts share the same functional architecture and package but operate under a different logic series (74AHCT instead of 74ACT), resulting in variations in clock frequency (140 MHz vs. 210 MHz), propagation delay (8.8ns vs. 11ns), output current (8mA vs. 24mA), and maximum operating temperature (125°C vs. 85°C).

Package Variants maintain electrical equivalence but use alternative surface mount packages (14-SSOP vs. 14-TSSOP), requiring PCB layout verification for pin spacing compatibility.

Parameter Comparison

Engineering Selection Recommendations

For Direct Replacement (Parametric Equivalents): MC74ACT74DTR2G is the primary parametric equivalent, manufactured by onsemi with active product status and ROHS3 compliance. This part maintains identical electrical specifications and 14-TSSOP package geometry, requiring no design modifications.

For Active Production (Direct Manufacturer Equivalents): SN74ACT74PWR (Texas Instruments, Active status) and SN74ACT74PW (Texas Instruments, Discontinued at DiGi Electronics) are direct equivalents with superior quiescent current performance (2 µA vs. 20 µA) and reduced input capacitance (3 pF vs. 4.5 pF). Both are ROHS3 compliant. SN74ACT74PWR is recommended for new designs due to active product status.

For Extended Temperature Applications: 74AHCT74PW,118 (NXP Semiconductors, Active status) operates across -40°C to 125°C, extending the upper temperature limit by 40°C. This part operates at reduced clock frequency (140 MHz vs. 210 MHz) and lower output current (8mA vs. 24mA), suitable for applications where thermal headroom is prioritized over maximum speed.

For Package Variant Substitution: SN74ACT74DBR uses a 14-SSOP package (0.209" width vs. 0.173" TSSOP width) with identical electrical specifications and active product status. PCB layout verification is required to confirm pin spacing compatibility before implementation.

Frequently Asked Questions (FAQ)

Q: Can MC74ACT74DTR2G directly replace 74ACT74MTCX without design changes? A: Yes. MC74ACT74DTR2G is a parametric equivalent with identical electrical specifications, package geometry (14-TSSOP), and operating parameters. No circuit modifications are required.

Q: What is the primary advantage of SN74ACT74PWR over the main part? A: SN74ACT74PWR reduces quiescent current from 20 µA to 2 µA and input capacitance from 4.5 pF to 3 pF, resulting in lower power consumption and improved signal integrity. It maintains identical clock frequency (210 MHz) and propagation delay (11ns).

Q: Is 74AHCT74PW,118 suitable as a drop-in replacement? A: 74AHCT74PW,118 is functionally compatible but operates under different electrical constraints: 140 MHz clock frequency (vs. 210 MHz), 8.8ns propagation delay (vs. 11ns), and 8mA output current (vs. 24mA). It is suitable only for applications where these reduced specifications are acceptable. The extended operating temperature range (-40°C to 125°C) may be beneficial for thermal-constrained designs.

Q: What is the difference between 14-TSSOP and 14-SSOP packages? A: Both are 14-pin surface mount packages with identical pin counts and functionality. The primary difference is physical width: 14-TSSOP measures 0.173" (4.40mm) while 14-SSOP measures 0.209" (5.30mm). PCB layout and component spacing must be verified before substituting SN74ACT74DBR for the main part.

Q: Are all substitute parts RoHS3 compliant? A: MC74ACT74DTR2G, SN74ACT74PW, SN74ACT74PWR, and SN74ACT74DBR are ROHS3 compliant. The main part (74ACT74MTCX) and 74AHCT74PW,118 do not specify RoHS status in the provided data.

Q: Which substitute part has the best availability? A: MC74ACT74DTR2G (10,200 pcs), 74AHCT74PW,118 (10,300 pcs), and SN74ACT74DBR (5,100 pcs) have the highest inventory levels. SN74ACT74PWR (3,866 pcs) and SN74ACT74PW (3,100 pcs) have lower stock but remain available.