74ACT125MTCX Equivalent & Substitute Parts

Part Overview

The 74ACT125MTCX is a Buffer, Non-Inverting logic IC with 4 elements, 1 bit per element, and 3-state output capability. Manufactured by onsemi in a 14-TSSOP surface mount package, this component operates across a 4.5V to 5.5V supply voltage range with output drive capability of 24mA for both high and low states.

The 74ACT125MTCX is classified as obsolete. Locating equivalent substitute parts is necessary to maintain design continuity and ensure component availability for new production runs and system maintenance.

Key Parameters

Parameter	Specification
Logic Type	Buffer, Non-Inverting
Number of Elements	4
Number of Bits per Element	1
Output Type	3-State
Current - Output High, Low	24mA, 24mA
Voltage - Supply	4.5V ~ 5.5V
Operating Temperature	-40°C ~ 85°C (TA)
Package / Case	14-TSSOP (0.173", 4.40mm Width)
Mounting Type	Surface Mount
Moisture Sensitivity Level (MSL)	1 (Unlimited)

Substitute Part Grouping Explanation

Substitute parts for the 74ACT125MTCX are identified based on strict electrical and mechanical parameter alignment:

Parametric Equivalent Classification: Parts matching all critical parameters including logic type (Buffer, Non-Inverting), element count (4), bit configuration (1 bit per element), output type (3-State), supply voltage range (4.5V ~ 5.5V), package type (14-TSSOP), and mounting method (Surface Mount).

Similar Classification: Parts that maintain functional equivalence in logic type, element count, bit configuration, output type, supply voltage range, and package type, but with variations in output current drive capability or operating temperature range.

The following parameters determine substitution eligibility:

Logic Type: Buffer, Non-Inverting
Number of Elements: 4
Number of Bits per Element: 1
Output Type: 3-State
Package / Case: 14-TSSOP
Voltage - Supply: 4.5V ~ 5.5V
Mounting Type: Surface Mount

Parameter Comparison

Parameter	74ACT125MTCX (Main)	MC74ACT125DTR2G (Parametric Equivalent)	74AHCT125PW,118 (Similar)
Manufacturer	onsemi	onsemi	Nexperia USA Inc.
Logic Type	Buffer, Non-Inverting	Buffer, Non-Inverting	Buffer, Non-Inverting
Number of Elements	4	4	4
Number of Bits per Element	1	1	1
Output Type	3-State	3-State	3-State
Current - Output High, Low	24mA, 24mA	24mA, 24mA	8mA, 8mA
Voltage - Supply	4.5V ~ 5.5V	4.5V ~ 5.5V	4.5V ~ 5.5V
Operating Temperature	-40°C ~ 85°C (TA)	-40°C ~ 85°C (TA)	-40°C ~ 125°C (TA)
Package / Case	14-TSSOP	14-TSSOP	14-TSSOP
Mounting Type	Surface Mount	Surface Mount	Surface Mount
Product Status	Obsolete	Active	Active
RoHS Status	Not specified	ROHS3 Compliant	ROHS3 Compliant
Moisture Sensitivity Level (MSL)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)
REACH Status	REACH Unaffected	REACH Unaffected	REACH Unaffected

Engineering Selection Recommendations

MC74ACT125DTR2G is the primary parametric equivalent substitute. Manufactured by onsemi, this part maintains identical electrical specifications including 24mA output drive capability and -40°C to 85°C operating temperature range. The component is Active in product status with ROHS3 compliance and REACH Unaffected certification. Packaging is available in Cut Tape (CT) & Digi-Reel format with 4168 units in stock.

74AHCT125PW,118 is a similar substitute manufactured by Nexperia USA Inc. This part maintains functional equivalence across logic type, element configuration, output type, supply voltage, and package specifications. Key differences include reduced output drive capability (8mA versus 24mA) and extended operating temperature range (-40°C to 125°C). The component is Active in product status with ROHS3 compliance and REACH Unaffected certification. Packaging is available in Tape & Reel (TR) format with 11202 units in stock.

Selection between these substitutes depends on output current requirements. Applications requiring 24mA drive capability must use MC74ACT125DTR2G. Applications tolerating 8mA output drive may use 74AHCT125PW,118, which offers extended temperature range capability.

Frequently Asked Questions (FAQ)

Q: Can MC74ACT125DTR2G directly replace 74ACT125MTCX? A: Yes. MC74ACT125DTR2G is a parametric equivalent with identical output current (24mA), supply voltage range (4.5V ~ 5.5V), operating temperature range (-40°C ~ 85°C), and 14-TSSOP package configuration. Both are manufactured by onsemi.

Q: What is the key difference between MC74ACT125DTR2G and 74AHCT125PW,118? A: The primary difference is output drive capability. MC74ACT125DTR2G provides 24mA output drive, while 74AHCT125PW,118 provides 8mA. The 74AHCT125PW,118 offers extended operating temperature range to 125°C. Both maintain identical logic function and package type.

Q: Can 74AHCT125PW,118 be used in applications requiring 24mA output drive? A: No. The 74AHCT125PW,118 is specified for 8mA output drive capability. Applications requiring 24mA output drive must use MC74ACT125DTR2G.

Q: Are all substitute parts available in the same package? A: Yes. All parts use the 14-TSSOP surface mount package with identical physical dimensions (0.173", 4.40mm Width). Packaging format differs: 74ACT125MTCX uses standard packaging, MC74ACT125DTR2G uses Cut Tape (CT) & Digi-Reel, and 74AHCT125PW,118 uses Tape & Reel (TR).

Q: Do substitute parts meet current compliance requirements? A: MC74ACT125DTR2G and 74AHCT125PW,118 are both ROHS3 compliant and REACH Unaffected. Both carry MSL 1 (Unlimited) moisture sensitivity rating.

Q: What is the product status of available substitutes? A: Both MC74ACT125DTR2G and 74AHCT125PW,118 are Active in product status, ensuring continued availability and supply chain support.

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