74ACT16244MTDX Equivalent & Substitute Parts

Part Overview

The 74ACT16244MTDX is a non-inverting buffer logic IC manufactured by onsemi, featuring 4 elements with 4 bits per element and 3-state output capability. Designed for 4.5V to 5.5V supply operation, this component is classified as obsolete, making identification of equivalent and substitute parts essential for ongoing system support and new design implementations.

Key Parameters

Parameter	Specification
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)
Mounting Type	Surface Mount
Package / Case	48-TFSOP (0.240", 6.10mm Width)
Supplier Device Package	48-TSSOP
Series	74ACT

Substitute Part Grouping Explanation

Substitution eligibility for the 74ACT16244MTDX is determined by strict alignment with 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
Voltage - Supply: 4.5V ~ 5.5V
Operating Temperature: -40°C ~ 85°C (TA)
Mounting Type: Surface Mount

Substitute parts are categorized into three groups:

Direct Manufacturer Equivalent: Identical part number from alternative manufacturers with matching package specifications (48-TFSOP).

Similar Manufacturer Equivalent: Same base functionality with alternative packaging (48-SSOP) that maintains electrical compatibility but differs in physical form factor.

Parametric Equivalent: Parts from alternative manufacturers or series (74FCT series) that meet all electrical and functional parameters but may have different product status or packaging options.

Parameter Comparison

Part Number	Manufacturer	Logic Type	Elements	Bits/Element	Output Type	Current (mA)	Supply Voltage	Temp Range	Package	Product Status
74ACT16244MTDX	onsemi	Buffer, Non-Inverting	4	4	3-State	24/24	4.5V ~ 5.5V	-40°C ~ 85°C	48-TFSOP	Obsolete
74ACT16244DGGR	Texas Instruments	Buffer, Non-Inverting	4	4	3-State	24/24	4.5V ~ 5.5V	-40°C ~ 85°C	48-TFSOP	Active
74ACT16244DL	Texas Instruments	Buffer, Non-Inverting	4	4	3-State	24/24	4.5V ~ 5.5V	-40°C ~ 85°C	48-BSSOP	Last Time Buy
74ACT16244DLR	Texas Instruments	Buffer, Non-Inverting	4	4	3-State	24/24	4.5V ~ 5.5V	-40°C ~ 85°C	48-BSSOP	Active
74FCT162244ATPACT	Cypress Semiconductor Corp	Buffer, Non-Inverting	4	4	3-State	24/24	4.5V ~ 5.5V	-40°C ~ 85°C	48-TFSOP	Active
74FCT162244CTPACT	Cypress Semiconductor Corp	Buffer, Non-Inverting	4	4	3-State	24/24	4.5V ~ 5.5V	-40°C ~ 85°C	48-TFSOP	Active
74FCT162H244ATPACT	Texas Instruments	Buffer, Non-Inverting	4	4	3-State	24/24	4.5V ~ 5.5V	-40°C ~ 85°C	48-TFSOP	Obsolete
CY74FCT162244TPACT	Texas Instruments	Buffer, Non-Inverting	4	4	3-State	24/24	4.5V ~ 5.5V	-40°C ~ 85°C	48-TFSOP	Obsolete

Engineering Selection Recommendations

Primary Recommendation: 74ACT16244DGGR (Texas Instruments) is the optimal direct equivalent. This part maintains identical electrical specifications, package form factor (48-TFSOP), and carries Active product status with ROHS3 compliance, ensuring long-term availability and regulatory alignment.

Secondary Recommendation: 74ACT16244DLR (Texas Instruments) provides an Active status alternative with identical electrical performance. The 48-BSSOP package (0.295", 7.50mm Width) differs from the original 48-TFSOP specification and requires PCB layout verification for mechanical compatibility.

Alternative Series Option: 74FCT162244CTPACT (Cypress Semiconductor Corp) offers parametric equivalence with Active product status and highest inventory availability (22,385 units). The 74FCT series maintains electrical compatibility while offering enhanced performance characteristics typical of FCT logic families.

Avoid: 74FCT162H244ATPACT and CY74FCT162244TPACT carry Obsolete product status, limiting their suitability for new designs despite electrical compatibility.

Frequently Asked Questions (FAQ)

Q: Can 74ACT16244DL be used as a direct replacement for 74ACT16244MTDX?

A: 74ACT16244DL maintains identical electrical specifications and logic functionality. However, the package differs (48-BSSOP vs. 48-TFSOP), requiring PCB footprint verification. Additionally, Last Time Buy status indicates limited future availability.

Q: What is the difference between 74ACT and 74FCT series buffers?

A: Both series meet the specified electrical parameters (4.5V ~ 5.5V supply, 24mA output current, -40°C ~ 85°C operating range). The 74FCT series represents an alternative logic family with comparable performance. Selection depends on design requirements and inventory availability.

Q: Is 74ACT16244DGGR a pin-for-pin replacement?

A: Yes. 74ACT16244DGGR maintains identical pinout, package form factor (48-TFSOP), and electrical specifications, making it a direct pin-for-pin replacement.

Q: Why is the original 74ACT16244MTDX marked as Obsolete?

A: Obsolete status indicates the manufacturer (onsemi) has discontinued production. Active alternatives from Texas Instruments and Cypress Semiconductor provide equivalent functionality with ongoing support.

Q: Can I use 74FCT162244ATPACT in place of 74ACT16244MTDX?

A: Yes. 74FCT162244ATPACT meets all electrical and functional parameters. The part carries Active status and identical package specifications (48-TFSOP), though it represents a different manufacturer series.

Q: What does ROHS3 compliance mean for substitution?

A: ROHS3 compliance indicates the part meets Restriction of Hazardous Substances regulations. Parts with this certification are suitable for applications requiring environmental compliance and are generally preferred for new designs.

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