74FCT244ATPYG Equivalent & Substitute Parts

Part Overview

The 74FCT244ATPYG is a non-inverting buffer logic IC manufactured by Renesas Electronics Corporation, configured as a 2-element, 4-bit per element buffer with 3-state output capability. This component operates within the 4.75V to 5.25V supply voltage range and is housed in a 20-SSOP package.

The 74FCT244ATPYG is classified as obsolete. Identifying equivalent and substitute parts is necessary to maintain design continuity, ensure supply chain availability, and support ongoing production requirements for systems utilizing this logic buffer architecture.

Key Parameters

Parameter	Value
Manufacturer Part Number	74FCT244ATPYG
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

Substitute Part Grouping Explanation

Substitute parts for the 74FCT244ATPYG are qualified based on the following electrical and mechanical parameters:

Core Electrical Parameters:

Logic type: Buffer, Non-Inverting
Number of elements: 2
Number of bits per element: 4
Output type: 3-State
Supply voltage range: 4.75V ~ 5.25V
Operating temperature range: -40°C ~ 85°C (TA)

Mechanical Parameters:

Mounting type: Surface Mount
Package type: 20-SSOP or 20-QSOP (functionally equivalent pinout)

Compliance Parameters:

RoHS3 compliance
REACH unaffected status

Substitute parts are grouped into two categories based on output current specifications and base product number designation:

Group 1 - 74FCT244 Base Series (Matched Output Current): Parts with output current specifications of 15mA high / 64mA low, matching the original 74FCT244ATPYG specification.

Group 2 - 74FCT2244 Base Series (Alternative Output Current): Parts with output current specifications of 15mA or 32mA high / 12mA or 64mA low, representing alternative buffer configurations within the 74FCT logic family.

All substitute parts maintain active product status from their respective manufacturers, ensuring ongoing availability and technical support.

Parameter Comparison

Parameter	74FCT244ATPYG (Main)	74FCT244ATQG	CY74FCT2244ATQCT	CY74FCT2244CTQCT	CY74FCT2244TQCT	CY74FCT244ATQCT	CY74FCT244CTQCT	CY74FCT244TQCT
Manufacturer	Renesas	IDT	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	Buffer, Non-Inverting
Number of Elements	2	2	2	2	2	2	2	2
Number of Bits per Element	4	4	4	4	4	4	4	4
Output Type	3-State	3-State	3-State	3-State	3-State	3-State	3-State	3-State
Current - Output High, Low	15mA, 64mA	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	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	-40°C ~ 85°C
Mounting Type	Surface Mount	Surface Mount	Surface Mount	Surface Mount	Surface Mount	Surface Mount	Surface Mount	Surface Mount
Package / Case	20-SSOP (0.209", 5.30mm)	20-QSOP (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)	20-SSOP (0.154", 3.90mm)
Product Status	Obsolete	Active	Active	Active	Active	Active	Active	Active
RoHS Status	ROHS3 Compliant	Not specified	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
MSL Rating	1 (Unlimited)	Not specified	2 (1 Year)	2 (1 Year)	2 (1 Year)	2 (1 Year)	2 (1 Year)	2 (1 Year)

Engineering Selection Recommendations

Primary Substitute - Matched Specification:

The 74FCT244ATQG (IDT) provides direct electrical equivalence with output current specifications matching the original 74FCT244ATPYG (15mA high / 64mA low). This part maintains active product status and is available in 20-QSOP packaging, which is functionally equivalent to the original 20-SSOP package. The 74FCT244ATQG is suitable for direct replacement in applications where the original output current drive capability is required.

Secondary Substitutes - Texas Instruments 74FCT244 Series:

The CY74FCT244ATQCT, CY74FCT244CTQCT, and CY74FCT244TQCT parts from Texas Instruments provide electrical equivalence with output current specifications of 32mA high / 64mA low. These parts exceed the original output current capability and are available in multiple packaging formats (Cut Tape and Tape & Reel). All three parts maintain ROHS3 compliance and active product status. These substitutes are suitable for applications where increased output drive capability is beneficial or required.

Alternative Substitutes - Texas Instruments 74FCT2244 Series:

The CY74FCT2244ATQCT, CY74FCT2244CTQCT, and CY74FCT2244TQCT parts represent the 74FCT2244 base product number with output current specifications of 15mA high / 12mA low. These parts maintain core functional equivalence but with reduced output current capability. These substitutes are suitable for applications where lower output current is acceptable or where power consumption reduction is a design objective.

All substitute parts maintain ROHS3 compliance and REACH unaffected status, ensuring regulatory alignment with the original component.

Frequently Asked Questions (FAQ)

Q: Can the 74FCT244ATQG directly replace the 74FCT244ATPYG?

A: Yes. The 74FCT244ATQG provides direct electrical equivalence with matching output current specifications (15mA high / 64mA low), identical logic configuration (2-element, 4-bit buffer with 3-state output), and compatible supply voltage and operating temperature ranges. The primary difference is packaging format: 20-QSOP versus 20-SSOP. Both packages are functionally equivalent for pinout purposes.

Q: What is the difference between 74FCT244 and 74FCT2244 base product numbers?

A: The 74FCT244 and 74FCT2244 represent different buffer configurations within the 74FCT logic family. The 74FCT244ATPYG uses the 74FCT244 base product number with output current specifications of 15mA high / 64mA low. The 74FCT2244 variants provide alternative output current specifications (15mA high / 12mA low). Both maintain identical logic type, element count, bit configuration, and 3-state output capability.

Q: Are there packaging differences between substitute parts?

A: Yes. The original 74FCT244ATPYG uses 20-SSOP packaging (0.209", 5.30mm width). Most substitute parts use 20-SSOP or 20-QSOP packaging (0.154", 3.90mm width). The 20-QSOP package is narrower but maintains functional pinout equivalence. PCB layout modifications may be required to accommodate the different package dimensions.

Q: Do all substitute parts meet RoHS3 compliance?

A: All substitute parts listed are ROHS3 compliant. The original 74FCT244ATPYG is also ROHS3 compliant. All parts maintain REACH unaffected status.

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

A: The original 74FCT244ATPYG has MSL rating of 1 (Unlimited), indicating no moisture sensitivity restrictions. Most substitute parts have MSL rating of 2 (1 Year), requiring storage and handling within specified moisture conditions for one year from the date of manufacture. This difference affects component storage, handling procedures, and shelf life management.

Q: Which substitute part should be selected for maximum output current capability?

A: The CY74FCT244ATQCT, CY74FCT244CTQCT, and CY74FCT244TQCT parts from Texas Instruments provide the highest output current capability at 32mA high / 64mA low, exceeding the original specification of 15mA high / 64mA low. These parts are suitable for applications requiring increased output drive capability.

Q: Are there inventory considerations when selecting substitute parts?

A: Yes. Inventory availability varies across substitute parts. The CY74FCT2244ATQCT has the highest inventory (4,977 pcs), while the CY74FCT2244CTQCT has the lowest (1,245 pcs). Inventory levels should be considered in conjunction with supply chain requirements and production schedules.

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