74ACTQ16244MTDX Equivalent & Substitute Parts

Part Overview

The 74ACTQ16244MTDX is a non-inverting buffer logic IC manufactured by onsemi, featuring 4 elements with 4 bits per element and 3-state output capability. This device operates at 4.5V to 5.5V supply voltage with 24mA output current capacity and is housed in a 48-TSSOP package. The product is currently obsolete, making equivalent and substitute parts necessary for ongoing system support and new designs requiring similar functionality.

Key Parameters

Parameter	Value
Logic Type	Buffer, Non-Inverting
Number of Elements	4
Number of Bits per Element	4
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	48-TFSOP (0.240", 6.10mm Width)
Mounting Type	Surface Mount
Moisture Sensitivity Level (MSL)	1 (Unlimited)

Substitute Part Grouping Explanation

Substitution for the 74ACTQ16244MTDX is determined by strict equivalence across the following critical parameters:

Logic Type: Buffer, Non-Inverting
Number of Elements: 4
Number of Bits per Element: 4
Output Type: 3-State
Current - Output High, Low: 24mA, 24mA
Operating Temperature: -40°C ~ 85°C (TA)
Mounting Type: Surface Mount
Package / Case: 48-TFSOP (0.240", 6.10mm Width)

Substitute parts are grouped into two categories:

Parametric Equivalents (5.5V Supply): Parts maintaining identical electrical specifications and package form factor, differing only in manufacturer or product status.

Functional Alternatives (Lower Voltage): Parts with identical logic architecture and pin configuration but operating at reduced supply voltage (2V ~ 3.6V), suitable only when system voltage requirements permit.

Parameter Comparison

Part Number	Manufacturer	Series	Voltage - Supply	Package / Case	Product Status	Current - Output (mA)	Operating Temperature
74ACTQ16244MTDX	onsemi	74ACTQ	4.5V ~ 5.5V	48-TFSOP	Obsolete	24, 24	-40°C ~ 85°C
74ACT16244DGGR	Texas Instruments	74ACT	4.5V ~ 5.5V	48-TFSOP	Active	24, 24	-40°C ~ 85°C
74FCT162244CTPACT	Cypress Semiconductor Corp	74FCT	4.5V ~ 5.5V	48-TFSOP	Active	24, 24	-40°C ~ 85°C
74FCT162244ATPACT	Cypress Semiconductor Corp	74FCT	4.5V ~ 5.5V	48-TFSOP	Active	24, 24	-40°C ~ 85°C
74FCT162H244ATPACT	Texas Instruments	74FCT	4.5V ~ 5.5V	48-TFSOP	Obsolete	24, 24	-40°C ~ 85°C
CY74FCT162244TPACT	Texas Instruments	74FCT	4.5V ~ 5.5V	48-TFSOP	Obsolete	24, 24	-40°C ~ 85°C
74ACT16244DL	Texas Instruments	74ACT	4.5V ~ 5.5V	48-BSSOP	Last Time Buy	24, 24	-40°C ~ 85°C
74ACT16244DLR	Texas Instruments	74ACT	4.5V ~ 5.5V	48-BSSOP	Active	24, 24	-40°C ~ 85°C
74LCX16244MTDX	onsemi	74LCX	2V ~ 3.6V	48-TFSOP	Active	24, 24	-40°C ~ 85°C

Engineering Selection Recommendations

Primary Substitutes (Direct Replacement):

74ACT16244DGGR and 74FCT162244CTPACT are recommended as primary substitutes. Both maintain identical electrical specifications, package form factor, and operating parameters. 74ACT16244DGGR carries Active product status with RoHS3 compliance, providing long-term availability. 74FCT162244CTPACT offers equivalent performance with higher inventory availability.

Secondary Substitutes (Package Variant):

74ACT16244DLR provides parametric equivalence with Active product status but uses a 48-BSSOP package (0.295", 7.50mm Width) instead of 48-TFSOP. This substitute requires PCB layout modification and is suitable only when package footprint change is acceptable.

Functional Alternative (Voltage Reduction):

74LCX16244MTDX operates at reduced supply voltage (2V ~ 3.6V) while maintaining identical logic architecture and 48-TFSOP package. This part is suitable only for systems designed for low-voltage operation and cannot be used as a direct replacement in 5.5V supply circuits.

Obsolete Alternatives:

74FCT162H244ATPACT and CY74FCT162244TPACT maintain full parametric equivalence but carry Obsolete product status. These parts should be avoided for new designs unless existing inventory is available and long-term supply is not required.

Frequently Asked Questions (FAQ)

Q: Can 74LCX16244MTDX replace 74ACTQ16244MTDX in a 5.5V system?

A: No. The 74LCX16244MTDX operates at 2V to 3.6V supply voltage and is not rated for 5.5V operation. Use only in systems designed for low-voltage logic levels.

Q: What is the difference between 48-TFSOP and 48-BSSOP packages?

A: Both are 48-pin surface mount packages. 48-TFSOP has a 0.240" (6.10mm) width, while 48-BSSOP has a 0.295" (7.50mm) width. PCB footprints are not interchangeable without layout redesign.

Q: Are all substitute parts RoHS3 compliant?

A: Not all. 74ACTQ16244MTDX and 74FCT162H244ATPACT do not list RoHS status. 74ACT16244DGGR, 74FCT162244CTPACT, 74FCT162244ATPACT, 74ACT16244DL, and 74ACT16244DLR are RoHS3 compliant.

Q: Which substitute has the best long-term availability?

A: 74ACT16244DGGR (Texas Instruments, Active status) and 74ACT16244DLR (Texas Instruments, Active status) are recommended for new designs requiring long-term supply assurance.

Q: Can I use 74FCT series parts as direct replacements?

A: Yes. 74FCT162244CTPACT and 74FCT162244ATPACT are parametric equivalents with identical electrical specifications, voltage range, and package form factor. Both are Active products suitable for new designs.

Q: What is the significance of product status (Active, Obsolete, Last Time Buy)?

A: Active status indicates ongoing production and long-term availability. Obsolete status indicates end-of-life with no further production. Last Time Buy indicates final production run with limited availability. For new designs, select Active status parts.

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