PI74FCT244DTSE Equivalent & Substitute Parts

Part Overview

The PI74FCT244DTSE is a non-inverting buffer logic IC manufactured by Diodes Incorporated, designed for 2 element, 4-bit per element configurations with 3-state output capability. This component operates within the 4.75V to 5.25V supply voltage range and is housed in a 20-SOIC surface mount package. The part 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	PI74FCT244DTSE
Manufacturer	Diodes Incorporated
Base Product Number	74FCT244
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)
Package / Case	20-SOIC (0.295", 7.50mm Width)
Mounting Type	Surface Mount
Product Status	Obsolete
RoHS Status	ROHS3 Compliant

Substitute Part Grouping Explanation

Substitution for the PI74FCT244DTSE is determined by strict equivalence across the following critical parameters:

Base product number (74FCT244 or 74FCT2244 series)
Logic type (Buffer, Non-Inverting)
Number of elements (2) and bits per element (4)
Output type (3-State)
Package / Case (20-SOIC)
Supply voltage range (4.75V ~ 5.25V)
Output current specifications (15mA high, 64mA low minimum)
Operating temperature range (-40°C ~ 85°C)

Substitute parts are grouped into two categories based on these parameters: direct 74FCT244 equivalents and compatible 74FCT2244 variants. Parts meeting all electrical and mechanical specifications are considered functionally interchangeable.

Parameter Comparison

Part Number	Manufacturer	Base Series	Output Current (H/L)	Operating Temp	Product Status	RoHS Status	Packaging
PI74FCT244DTSE	Diodes Incorporated	74FCT244	15mA / 64mA	-40°C ~ 85°C	Obsolete	ROHS3 Compliant	Bulk
74FCT244ATSOG8	IDT	74FCT244	15mA / 64mA	-40°C ~ 85°C	Active	Not specified	Bulk
CD74FCT244ATM	Harris Corporation	74FCT244	15mA / 64mA	0°C ~ 70°C	Obsolete	RoHS non-compliant	Tube
CD74FCT244ATM96	Texas Instruments	74FCT244	15mA / 64mA	0°C ~ 70°C	Active	ROHS3 Compliant	Tape & Reel
CD74FCT244M	Harris Corporation	74FCT244	15mA / 64mA	0°C ~ 70°C	Obsolete	RoHS non-compliant	Tube
CD74FCT244M96	Harris Corporation	74FCT244	15mA / 64mA	0°C ~ 70°C	Obsolete	RoHS non-compliant	Bulk
CY74FCT244ATSOC	Texas Instruments	74FCT244	32mA / 64mA	-40°C ~ 85°C	Active	ROHS3 Compliant	Tube
CY74FCT244ATSOCT	Cypress Semiconductor	74FCT244	32mA / 64mA	-40°C ~ 85°C	Active	Not specified	Bulk
CY74FCT2244ATSOC	Texas Instruments	74FCT2244	15mA / 12mA	-40°C ~ 85°C	Active	ROHS3 Compliant	Tube
CY74FCT2244CTSOC	Texas Instruments	74FCT2244	15mA / 12mA	-40°C ~ 85°C	Active	ROHS3 Compliant	Tube
CY74FCT2244TSOC	Texas Instruments	74FCT2244	15mA / 12mA	-40°C ~ 85°C	Active	ROHS3 Compliant	Tube

Engineering Selection Recommendations

For applications requiring direct replacement of the PI74FCT244DTSE with active product status and full compliance certification, the CD74FCT244ATM96 (Texas Instruments) is the primary selection. This part maintains identical electrical specifications, operates across the full -40°C to 85°C temperature range, carries ROHS3 compliance, and is currently in active production status.

The 74FCT244ATSOG8 (IDT) provides an alternative active substitute with matching output current and temperature specifications, though RoHS status is not specified in available documentation.

For applications where extended output current capability is acceptable, the CY74FCT244ATSOC (Texas Instruments) and CY74FCT244ATSOCT (Cypress Semiconductor) offer higher output current ratings (32mA high, 64mA low) while maintaining the full operating temperature range and ROHS3 compliance.

The CY74FCT2244 series variants (ATSOC, CTSOC, TSOC) represent compatible alternatives within the 74FCT2244 base product family. These parts maintain the full temperature range and ROHS3 compliance but feature reduced output low current (12mA) compared to the original specification.

Parts with obsolete status (CD74FCT244ATM, CD74FCT244M, CD74FCT244M96) and RoHS non-compliance should be avoided for new designs requiring regulatory compliance.

Frequently Asked Questions (FAQ)

Q: Can the CY74FCT2244 series be used as a direct substitute for the PI74FCT244DTSE?

A: The CY74FCT2244 variants are functionally compatible within the 74FCT logic family but operate under the 74FCT2244 base product designation. They maintain the same package, pin configuration, and supply voltage range. However, the output low current specification differs (12mA versus 64mA). Selection depends on whether the application circuit can operate within the reduced output current capability.

Q: What is the difference between the CD74FCT244ATM96 and CD74FCT244M96?

A: Both parts share the same base product number (74FCT244) and output current specifications. The primary differences are manufacturer (Texas Instruments versus Harris Corporation), packaging format (Tape & Reel versus Bulk), and product status (Active versus Obsolete). The CD74FCT244ATM96 is recommended for new designs due to active status.

Q: Are there temperature range limitations when substituting with CD74FCT244ATM?

A: Yes. The CD74FCT244ATM operates across 0°C to 70°C, which is narrower than the original PI74FCT244DTSE specification of -40°C to 85°C. Applications requiring operation below 0°C or above 70°C must use alternatives with the extended temperature range, such as CD74FCT244ATM96, CY74FCT244ATSOC, or 74FCT244ATSOG8.

Q: Does packaging format affect electrical performance?

A: No. Packaging format (Bulk, Tube, Tape & Reel) does not affect electrical performance. Selection is based on procurement requirements, quantity, and handling procedures. All 20-SOIC package variants are mechanically and electrically equivalent.

Q: Which substitute offers the best compliance profile for new designs?

A: The CD74FCT244ATM96 (Texas Instruments) combines active product status, ROHS3 compliance, full -40°C to 85°C operating range, and standard output current specifications. This part is optimized for regulatory compliance and long-term availability in new design implementations.

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