74ACT16244SSCX Equivalent & Substitute Parts

Part Overview

The 74ACT16244SSCX is a non-inverting buffer IC with 4 elements, 4 bits per element, and 3-state output capability. Manufactured by onsemi in a 48-SSOP package, this logic component is designed for signal buffering and distribution in digital systems operating at 4.5V to 5.5V supply voltage.

The 74ACT16244SSCX has reached obsolete product status. Locating equivalent or substitute parts is necessary to maintain design continuity, ensure supply chain availability, and support ongoing production or maintenance requirements.

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-BSSOP (0.295", 7.50mm Width)
Mounting Type	Surface Mount
Series	74ACT

Substitute Part Grouping Explanation

Substitution eligibility for the 74ACT16244SSCX 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
Voltage - Supply: 4.5V ~ 5.5V
Operating Temperature: -40°C ~ 85°C (TA)
Package / Case: 48-BSSOP or compatible 48-pin surface mount packages

Substitute parts are categorized as follows:

Direct Substitutes (Same Base Product, Different Packaging/Manufacturer): Parts sharing the 74ACT16244 base product number with identical electrical specifications and compatible packaging.

Parametric Equivalents (Different Series, Identical Electrical Performance): Parts from the 74FCT series that maintain all critical electrical parameters and output characteristics, enabling functional replacement despite series designation differences.

Parameter Comparison

Part Number	Manufacturer	Logic Type	Elements	Bits/Element	Output Type	Current (mA)	Supply Voltage	Temp Range	Package	Product Status
74ACT16244SSCX	onsemi	Buffer, Non-Inverting	4	4	3-State	24, 24	4.5V ~ 5.5V	-40°C ~ 85°C	48-BSSOP	Obsolete
74ACT16244DLR	Texas Instruments	Buffer, Non-Inverting	4	4	3-State	24, 24	4.5V ~ 5.5V	-40°C ~ 85°C	48-BSSOP	Active
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
74FCT162244ATPVCT	Texas Instruments	Buffer, Non-Inverting	4	4	3-State	24, 24	4.5V ~ 5.5V	-40°C ~ 85°C	48-BSSOP	Obsolete
74FCT162244ATPVG8	Renesas Electronics Corporation	Buffer, Non-Inverting	4	4	3-State	24, 24	4.5V ~ 5.5V	-40°C ~ 85°C	48-BSSOP	Active
74FCT162244CTPVCT	Cypress Semiconductor Corp	Buffer, Non-Inverting	4	4	3-State	24, 24	4.5V ~ 5.5V	-40°C ~ 85°C	48-BSSOP	Active
CY74FCT162244TPVCT	Cypress Semiconductor Corp	Buffer, Non-Inverting	4	4	3-State	24, 24	4.5V ~ 5.5V	-40°C ~ 85°C	48-BSSOP	Active

Engineering Selection Recommendations

Preferred Direct Substitute: 74ACT16244DLR (Texas Instruments, Active status)

The 74ACT16244DLR is the primary recommended substitute. It maintains identical electrical specifications, operates within the same supply voltage and temperature ranges, and shares the same 48-BSSOP package footprint. Texas Instruments actively manufactures this part, ensuring long-term availability and supply chain stability.

Alternative Direct Substitute: 74ACT16244DL (Texas Instruments, Last Time Buy status)

The 74ACT16244DL provides equivalent functionality with identical electrical parameters and package compatibility. However, this part carries Last Time Buy status, indicating limited remaining inventory. Selection of this part should account for potential future supply constraints.

Package Variant: 74ACT16244DGGR (Texas Instruments, Active status)

The 74ACT16244DGGR offers active production status and identical electrical performance. The package differs slightly (48-TFSOP vs. 48-BSSOP), with a reduced width of 6.10mm compared to 7.50mm. This variant is suitable only if PCB layout accommodates the narrower footprint.

Parametric Equivalents (74FCT Series):

The 74FCT162244ATPVG8 (Renesas, Active), 74FCT162244CTPVCT (Cypress, Active), and CY74FCT162244TPVCT (Cypress, Active) are parametric equivalents from the 74FCT logic family. These parts maintain all critical electrical specifications and output characteristics. The 74FCT162244ATPVG8 carries MSL-3 moisture sensitivity versus MSL-1 for the 74ACT series, requiring appropriate handling protocols during assembly.

Avoid: 74FCT162244ATPVCT (Texas Instruments, Obsolete status) and 74ACT16244SSCX alternatives should not be selected for new designs due to obsolete product status and limited inventory availability.

Frequently Asked Questions (FAQ)

Q: Can I use 74ACT16244DLR as a direct replacement for 74ACT16244SSCX?

A: Yes. The 74ACT16244DLR is a direct substitute. Both parts share identical electrical specifications (4 elements, 4 bits per element, 3-state output, 24mA output current, 4.5V–5.5V supply, -40°C to 85°C operating range) and the same 48-BSSOP package footprint. The primary difference is manufacturer (Texas Instruments vs. onsemi) and active production status.

Q: What is the difference between 74ACT16244DLR and 74ACT16244DGGR?

A: Both parts are manufactured by Texas Instruments and share identical electrical specifications. The key difference is packaging: 74ACT16244DLR uses 48-BSSOP (7.50mm width), while 74ACT16244DGGR uses 48-TFSOP (6.10mm width). The narrower TFSOP package may require PCB layout verification before substitution.

Q: Can I substitute a 74FCT162244 series part for the 74ACT16244SSCX?

A: Yes, parametrically. The 74FCT162244 series maintains all critical electrical specifications and output characteristics. However, the 74FCT series differs in logic family designation. Verify that your application does not impose specific timing or noise immunity requirements that distinguish ACT from FCT logic families. The 74FCT162244ATPVG8 (Renesas) carries MSL-3 moisture sensitivity, requiring controlled assembly conditions.

Q: Why is 74ACT16244DL marked as Last Time Buy?

A: Last Time Buy status indicates that Texas Instruments has announced end-of-life for this part. Remaining inventory is limited, and no further production is planned. While functionally equivalent, this part should be selected only if immediate availability is critical and long-term supply is not required.

Q: Are there any compliance or certification differences between substitute parts?

A: All listed substitute parts maintain REACH Unaffected and EAR99 ECCN status, consistent with the original 74ACT16244SSCX. RoHS3 compliance is confirmed for all Texas Instruments and Renesas parts. Cypress parts do not list explicit RoHS status in provided data. Verify compliance requirements with your procurement or quality department before final selection.

Q: What is the significance of MSL (Moisture Sensitivity Level) differences?

A: The 74ACT16244SSCX and most direct substitutes carry MSL-1 (Unlimited), indicating no moisture sensitivity restrictions. The 74FCT162244ATPVG8 carries MSL-3 (168 Hours), requiring that the component be stored in dry conditions and used within 168 hours of package opening. If your manufacturing environment does not support MSL-3 handling, select MSL-1 alternatives.

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