CY74FCT16244ATPACT Equivalent & Substitute Parts

Part Overview

The CY74FCT16244ATPACT is a non-inverting buffer logic IC manufactured by Texas Instruments, featuring 4 elements with 4 bits per element and 3-state output capability. Housed in a 48-TFSOP package, this component operates across a 4.5V to 5.5V supply voltage range with output drive capabilities of 32mA (high) and 64mA (low). The device is classified as obsolete, making equivalent and substitute parts necessary for ongoing system support and new design implementations.

Key Parameters

Parameter	Value
Manufacturer Part Number	CY74FCT16244ATPACT
Manufacturer	Texas Instruments
Logic Type	Buffer, Non-Inverting
Number of Elements	4
Number of Bits per Element	4
Output Type	3-State
Current - Output High, Low	32mA, 64mA
Voltage - Supply	4.5V ~ 5.5V
Operating Temperature	-40°C ~ 85°C (TA)
Package / Case	48-TFSOP (0.240", 6.10mm Width)
Product Status	Obsolete
RoHS Status	ROHS3 Compliant
Moisture Sensitivity Level (MSL)	1 (Unlimited)

Substitute Part Grouping Explanation

Substitution for the CY74FCT16244ATPACT is determined by the following critical parameters:

Functional Equivalence Requirements:

Logic type: Buffer, Non-Inverting
Number of elements: 4
Number of bits per element: 4
Output type: 3-State
Package type: 48-pin TFSOP or compatible footprint

Electrical Compatibility Requirements:

Supply voltage range: 4.5V ~ 5.5V (primary requirement) or lower voltage operation with verified compatibility
Output current drive: Minimum 32mA (high) and 64mA (low)
Operating temperature: -40°C ~ 85°C (TA)

Compliance Requirements:

RoHS3 compliance
MSL rating: 1 (Unlimited) preferred

Substitute parts are grouped into two categories: parametric equivalents (identical electrical specifications and package) and manufacturer-recommended alternatives (different voltage ratings or package variants with verified functional compatibility).

Parameter Comparison

Part Number	Manufacturer	Series	Voltage Supply	Output Current (H/L)	Package	Product Status	MSL
CY74FCT16244ATPACT	Texas Instruments	74FCT	4.5V ~ 5.5V	32mA, 64mA	48-TFSOP	Obsolete	1
CY74FCT16244CTPACT	Texas Instruments	74FCT	4.5V ~ 5.5V	32mA, 64mA	48-TFSOP	Obsolete	1
CY74FCT16244TPACT	Texas Instruments	74FCT	4.5V ~ 5.5V	32mA, 64mA	48-TFSOP	Obsolete	1
SN74ABT16244ADGGR	Texas Instruments	74ABT	4.5V ~ 5.5V	32mA, 64mA	48-TFSOP	Active	1
SN74ABT16241ADGGR	Texas Instruments	74ABT	4.5V ~ 5.5V	32mA, 64mA	48-TFSOP	Active	1
SN74ABTH16244DGGR	Texas Instruments	74ABTH	4.5V ~ 5.5V	32mA, 64mA	48-TFSOP	Active	1
SN74LVCZ16244ADGGR	Texas Instruments	74LVCZ	2.7V ~ 3.6V	24mA, 24mA	48-TFSOP	Active	1
74FCT162244ATPVG	IDT	74FCT	4.5V ~ 5.5V	24mA, 24mA	48-BSSOP	Active	Not specified
74FCT162244ATPVG8	Renesas Electronics	74FCT	4.5V ~ 5.5V	24mA, 24mA	48-BSSOP	Active	3
74FCT162244CTPVG	IDT	74FCT	4.5V ~ 5.5V	24mA, 24mA	48-BSSOP	Active	Not specified
74FCT16244ATPVG	IDT	74FCT	4.5V ~ 5.5V	32mA, 64mA	48-BSSOP	Active	Not specified

Engineering Selection Recommendations

Direct Parametric Equivalents (Recommended Primary Substitutes):

The CY74FCT16244CTPACT and CY74FCT16244TPACT are parametric equivalents to the CY74FCT16244ATPACT, maintaining identical electrical specifications (4.5V ~ 5.5V supply, 32mA/64mA output drive) and package configuration (48-TFSOP). Both remain obsolete but provide exact functional replacement. These are suitable for direct substitution in existing designs without circuit modification.

Active Product Alternatives (Recommended for New Designs):

The SN74ABT16244ADGGR, SN74ABT16241ADGGR, and SN74ABTH16244DGGR from Texas Instruments are active products maintaining the same electrical specifications and 48-TFSOP package footprint. These 74ABT and 74ABTH series devices provide long-term availability and supply chain stability. The SN74ABTH16244DGGR offers enhanced performance characteristics within the same voltage and current specifications.

Cross-Manufacturer Alternatives:

The 74FCT162244ATPVG (IDT) and 74FCT162244ATPVG8 (Renesas) provide functional equivalence with identical supply voltage range but differ in package (48-BSSOP versus 48-TFSOP) and output current specifications (24mA/24mA versus 32mA/64mA). These require PCB layout modification due to package differences and may require circuit analysis for reduced output drive capability.

Lower Voltage Alternative:

The SN74LVCZ16244ADGGR operates at 2.7V ~ 3.6V supply voltage with reduced output current (24mA/24mA). This device is suitable only for systems designed for lower voltage operation and is not a direct replacement for 5V applications.

Frequently Asked Questions (FAQ)

Q: Can I use SN74LVCZ16244ADGGR as a direct replacement for CY74FCT16244ATPACT?

A: No. The SN74LVCZ16244ADGGR operates at 2.7V ~ 3.6V supply voltage, incompatible with the 4.5V ~ 5.5V requirement of the CY74FCT16244ATPACT. Additionally, output current drive is reduced to 24mA/24mA. Use only in systems designed for 3.6V operation.

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

A: Both are 48-pin surface mount packages but differ in physical dimensions and pin pitch. 48-TFSOP (0.240", 6.10mm width) and 48-BSSOP (0.295", 7.50mm width) are not interchangeable without PCB redesign. Verify footprint compatibility before substitution.

Q: Are the 74ABT series devices pin-compatible with the CY74FCT16244ATPACT?

A: Yes. The SN74ABT16244ADGGR, SN74ABT16241ADGGR, and SN74ABTH16244DGGR maintain identical pin configuration and 48-TFSOP package, enabling direct substitution. All three are active products from Texas Instruments.

Q: Why do some substitute parts have lower output current specifications?

A: The 74FCT162244 variants (24mA/24mA) represent a different product line within the 74FCT series with reduced output drive capability. These are suitable only for applications with lower current requirements. Verify circuit load requirements before substitution.

Q: Is the CY74FCT16244ATPACT still available for purchase?

A: The CY74FCT16244ATPACT is classified as obsolete. For new designs, use active alternatives such as SN74ABT16244ADGGR, SN74ABT16241ADGGR, or SN74ABTH16244DGGR. For legacy system support, limited inventory may be available through authorized distributors.

Q: What does MSL rating mean for this component?

A: Moisture Sensitivity Level (MSL) indicates the component's sensitivity to moisture during storage and handling. MSL 1 (Unlimited) means the device has no moisture sensitivity restrictions and can be stored indefinitely without special precautions. MSL 3 (168 Hours) requires controlled storage conditions.

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