74FCT244CTPYG Equivalent & Substitute Parts

Part Overview

The 74FCT244CTPYG is a non-inverting buffer logic integrated circuit manufactured by Renesas Electronics Corporation. This device features 2 elements with 4 bits per element and 3-state output capability, housed in a 20-SSOP surface mount package. The part is classified as obsolete, making equivalent substitute parts necessary for ongoing design support and procurement.

Key Parameters

Parameter	Value
Manufacturer Part Number	74FCT244CTPYG
Manufacturer	Renesas Electronics Corporation
Logic Type	Buffer, Non-Inverting
Number of Elements	2
Number of Bits per Element	4
Output Type	3-State
Current - Output High, Low	15mA, 64mA
Voltage - Supply	4.75V ~ 5.25V
Operating Temperature	-40°C ~ 85°C (TA)
Mounting Type	Surface Mount
Package / Case	20-SSOP (0.209", 5.30mm Width)
Product Status	Obsolete
RoHS Status	ROHS3 Compliant
Moisture Sensitivity Level (MSL)	1 (Unlimited)

Substitute Part Grouping Explanation

Substitution of the 74FCT244CTPYG is determined by the following critical parameters:

Logic Type: Buffer, Non-Inverting
Number of Elements: 2
Number of Bits per Element: 4
Output Type: 3-State
Voltage - Supply: 4.75V ~ 5.25V
Operating Temperature: -40°C ~ 85°C (TA)
Mounting Type: Surface Mount
Package / Case: 20-SSOP

All substitute parts listed maintain these core functional and electrical specifications. Variations in output current ratings (15mA/12mA vs. 32mA/64mA) and package width dimensions (0.154" vs. 0.209") are acceptable within the 20-SSOP classification for logic buffer applications. Product status transitions from obsolete to active availability represent the primary advantage of substitution.

Parameter Comparison

Parameter	74FCT244CTPYG (Main)	CY74FCT2244ATQCT	CY74FCT2244CTQCT	CY74FCT2244TQCT	CY74FCT244ATQCT	CY74FCT244CTQCT	CY74FCT244TQCT
Manufacturer	Renesas Electronics	Texas Instruments	Texas Instruments	Texas Instruments	Texas Instruments	Texas Instruments	Texas Instruments
Logic Type	Buffer, Non-Inverting	Buffer, Non-Inverting	Buffer, Non-Inverting	Buffer, Non-Inverting	Buffer, Non-Inverting	Buffer, Non-Inverting	Buffer, Non-Inverting
Number of Elements	2	2	2	2	2	2	2
Number of Bits per Element	4	4	4	4	4	4	4
Output Type	3-State	3-State	3-State	3-State	3-State	3-State	3-State
Current - Output High, Low	15mA, 64mA	15mA, 12mA	15mA, 12mA	15mA, 12mA	32mA, 64mA	32mA, 64mA	32mA, 64mA
Voltage - Supply	4.75V ~ 5.25V	4.75V ~ 5.25V	4.75V ~ 5.25V	4.75V ~ 5.25V	4.75V ~ 5.25V	4.75V ~ 5.25V	4.75V ~ 5.25V
Operating Temperature	-40°C ~ 85°C	-40°C ~ 85°C	-40°C ~ 85°C	-40°C ~ 85°C	-40°C ~ 85°C	-40°C ~ 85°C	-40°C ~ 85°C
Mounting Type	Surface Mount	Surface Mount	Surface Mount	Surface Mount	Surface Mount	Surface Mount	Surface Mount
Package / Case	20-SSOP (0.209", 5.30mm)	20-SSOP (0.154", 3.90mm)	20-SSOP (0.154", 3.90mm)	20-SSOP (0.154", 3.90mm)	20-SSOP (0.154", 3.90mm)	20-SSOP (0.154", 3.90mm)	20-SSOP (0.154", 3.90mm)
Product Status	Obsolete	Active	Active	Active	Active	Active	Active
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
MSL Rating	1 (Unlimited)	2 (1 Year)	2 (1 Year)	2 (1 Year)	2 (1 Year)	2 (1 Year)	2 (1 Year)

Engineering Selection Recommendations

All listed substitute parts are manufactured by Texas Instruments and maintain active product status, providing long-term availability and supply chain stability compared to the obsolete 74FCT244CTPYG. All substitutes are ROHS3 compliant and REACH unaffected, meeting current environmental and regulatory requirements.

Selection between substitute options depends on output current requirements:

CY74FCT2244ATQCT, CY74FCT2244CTQCT, CY74FCT2244TQCT: Suitable for applications requiring lower output current (15mA high, 12mA low). These parts use the 74FCT2244 base product number.
CY74FCT244ATQCT, CY74FCT244CTQCT, CY74FCT244TQCT: Suitable for applications requiring higher output current (32mA high, 64mA low), matching the original part's low-side current specification. These parts use the 74FCT244 base product number.

Packaging format selection (Cut Tape vs. Tape & Reel) should align with procurement and assembly requirements. All substitute parts are housed in 20-SSOP packages with 0.154" width, which is mechanically compatible with standard surface mount assembly processes.

Frequently Asked Questions (FAQ)

Q: Can CY74FCT2244ATQCT, CY74FCT2244CTQCT, or CY74FCT2244TQCT be used as direct replacements for 74FCT244CTPYG?

A: These parts are functionally equivalent in logic operation, voltage supply, temperature range, and package type. However, they feature reduced output current capability (15mA high, 12mA low vs. 15mA high, 64mA low). Selection depends on circuit load requirements. If the original design requires 64mA low-side current, these parts are not suitable.

Q: What is the difference between CY74FCT244ATQCT, CY74FCT244CTQCT, and CY74FCT244TQCT?

A: These three parts are identical in electrical specifications and functionality. The differences are in packaging format: CY74FCT244ATQCT is supplied in Cut Tape (CT), while CY74FCT244CTQCT and CY74FCT244TQCT are supplied in Tape & Reel (TR). Selection should be based on procurement quantity and assembly line requirements.

Q: Are the package dimension differences between 0.209" and 0.154" width significant?

A: Both dimensions fall within the 20-SSOP package classification and are mechanically compatible with standard surface mount assembly equipment. The 0.154" width of Texas Instruments parts represents a more compact design. PCB layout and footprint compatibility should be confirmed during design integration.

Q: What is the significance of MSL rating differences?

A: The original 74FCT244CTPYG has MSL 1 (Unlimited), while all Texas Instruments substitutes have MSL 2 (1 Year). MSL 2 requires storage in controlled humidity conditions and has a one-year shelf life from the date of manufacture. Standard moisture control practices during storage and assembly are required.

Q: Are all substitute parts ROHS3 compliant?

A: Yes, all listed substitute parts are ROHS3 compliant and REACH unaffected, meeting current environmental regulations for electronic component manufacturing and use.

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