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PI74FCT244ATSE Equivalent & Substitute Parts
Part Overview
The PI74FCT244ATSE is a non-inverting buffer logic IC manufactured by Diodes Incorporated, featuring 2 elements with 4 bits per element and 3-state output capability in a 20-SOIC package. This part is classified as obsolete, which necessitates identification of equivalent substitute components for ongoing design support and procurement continuity. Substitute parts must maintain identical electrical characteristics and mechanical compatibility to ensure direct replacement without circuit redesign.
Substiute Parts
Key Parameters
| Parameter | Value |
|---|---|
| Manufacturer Part Number | PI74FCT244ATSE |
| Manufacturer | Diodes Incorporated |
| 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
Substitute parts for the PI74FCT244ATSE are classified based on strict electrical and mechanical parameter matching. The primary substitution criteria are:
Critical Parameters for Substitution:
- Logic Type: Buffer, Non-Inverting
- Number of Elements: 2
- Number of Bits per Element: 4
- Output Type: 3-State
- Package / Case: 20-SOIC (0.295", 7.50mm Width)
- Voltage - Supply: 4.75V ~ 5.25V
- Current - Output High, Low: 15mA, 64mA
- Operating Temperature: -40°C ~ 85°C (TA)
Grouping Categories:
Group 1 - Direct Equivalents (Identical Parameters): Parts matching all critical electrical specifications and operating temperature range (-40°C ~ 85°C).
Group 2 - Functional Equivalents (Temperature Derating): Parts with identical electrical specifications but reduced operating temperature range (0°C ~ 70°C), suitable for applications not requiring full temperature coverage.
Group 3 - Related Series (74FCT2244 Base): Parts from the 74FCT2244 series with modified output current specifications (15mA, 12mA instead of 15mA, 64mA), maintaining core buffer functionality within the same package.
Parameter Comparison
| Part Number | Manufacturer | Logic Type | Elements | Bits/Element | Output Type | Current High/Low (mA) | Supply Voltage | Temp Range (°C) | Package | Status | RoHS |
|---|---|---|---|---|---|---|---|---|---|---|---|
| PI74FCT244ATSE | Diodes Inc. | Buffer, Non-Inv | 2 | 4 | 3-State | 15, 64 | 4.75-5.25V | -40 to 85 | 20-SOIC | Obsolete | ROHS3 |
| 74FCT244ATSOG | IDT | Buffer, Non-Inv | 2 | 4 | 3-State | 15, 64 | 4.75-5.25V | -40 to 85 | 20-SOIC | Active | Not specified |
| CD74FCT244ATM | Harris Corp. | Buffer, Non-Inv | 2 | 4 | 3-State | 15, 64 | 4.75-5.25V | 0 to 70 | 20-SOIC | Obsolete | Non-compliant |
| 74FCT244ATSOG8 | IDT | Buffer, Non-Inv | 2 | 4 | 3-State | 15, 64 | 4.75-5.25V | -40 to 85 | 20-SOIC | Active | Not specified |
| CD74FCT244ATM96 | Texas Instruments | Buffer, Non-Inv | 2 | 4 | 3-State | 15, 64 | 4.75-5.25V | 0 to 70 | 20-SOIC | Active | ROHS3 |
| CD74FCT244M | Harris Corp. | Buffer, Non-Inv | 2 | 4 | 3-State | 15, 64 | 4.75-5.25V | 0 to 70 | 20-SOIC | Obsolete | Non-compliant |
| CD74FCT244M96 | Harris Corp. | Buffer, Non-Inv | 2 | 4 | 3-State | 15, 64 | 4.75-5.25V | 0 to 70 | 20-SOIC | Obsolete | Non-compliant |
| CY74FCT2244ATSOC | Texas Instruments | Buffer, Non-Inv | 2 | 4 | 3-State | 15, 12 | 4.75-5.25V | -40 to 85 | 20-SOIC | Active | ROHS3 |
| CY74FCT2244CTSOC | Texas Instruments | Buffer, Non-Inv | 2 | 4 | 3-State | 15, 12 | 4.75-5.25V | -40 to 85 | 20-SOIC | Active | ROHS3 |
| CY74FCT2244TSOC | Texas Instruments | Buffer, Non-Inv | 2 | 4 | 3-State | 15, 12 | 4.75-5.25V | -40 to 85 | 20-SOIC | Active | ROHS3 |
| CY74FCT244ATSOC | Texas Instruments | Buffer, Non-Inv | 2 | 4 | 3-State | 32, 64 | 4.75-5.25V | -40 to 85 | 20-SOIC | Active | ROHS3 |
Engineering Selection Recommendations
Primary Substitutes (Full Compatibility):
74FCT244ATSOG (IDT) and 74FCT244ATSOG8 (IDT) are direct equivalents with active product status, matching all electrical parameters and the full operating temperature range (-40°C ~ 85°C). Both parts maintain SOIC packaging compatibility and are recommended as primary replacements for the obsolete PI74FCT244ATSE.
Secondary Substitutes (Temperature-Derating Applications):
CD74FCT244ATM96 (Texas Instruments) provides an active alternative with ROHS3 compliance and identical electrical specifications. The operating temperature range is limited to 0°C ~ 70°C, making this part suitable for applications not requiring extended low-temperature operation below 0°C.
Functional Alternatives (Modified Output Current):
CY74FCT2244ATSOC, CY74FCT2244CTSOC, and CY74FCT2244TSOC (Texas Instruments) maintain the full operating temperature range and ROHS3 compliance but feature reduced output low current (12mA vs. 64mA). These parts are suitable for applications where lower output current is acceptable. CY74FCT244ATSOC (Texas Instruments) offers increased output high current (32mA vs. 15mA) with standard output low current (64mA), providing enhanced drive capability for specific load requirements.
Obsolete Alternatives (Not Recommended for New Designs):
CD74FCT244ATM, CD74FCT244M, and CD74FCT244M96 (Harris Corporation) are obsolete with RoHS non-compliance and limited temperature range (0°C ~ 70°C). These parts should not be selected for new applications.
Frequently Asked Questions (FAQ)
Q: Can 74FCT244ATSOG directly replace PI74FCT244ATSE without circuit modification?
A: Yes. The 74FCT244ATSOG matches all critical electrical parameters (15mA/64mA output current, 4.75V-5.25V supply, -40°C to 85°C operating range) and package specifications (20-SOIC). Direct pin-for-pin substitution is valid.
Q: What is the difference between 74FCT244ATSOG and CY74FCT244ATSOC?
A: Both parts maintain the full operating temperature range and ROHS3 compliance. The primary difference is output current: 74FCT244ATSOG provides 15mA/64mA, while CY74FCT244ATSOC provides 32mA/64mA. Selection depends on load current requirements.
Q: Are the CY74FCT2244 series parts (with 12mA output low current) suitable replacements?
A: CY74FCT2244ATSOC, CY74FCT2244CTSOC, and CY74FCT2244TSOC are functionally compatible for applications where 12mA output low current is sufficient. The reduced current capability may not support all legacy circuit designs requiring 64mA output low current.
Q: Why do some substitutes have a 0°C to 70°C temperature range instead of -40°C to 85°C?
A: CD74FCT244ATM96 and related Harris parts are specified for a narrower temperature range. These parts are suitable only for applications operating within 0°C to 70°C. Applications requiring extended temperature coverage should select parts with -40°C to 85°C ratings.
Q: Is RoHS compliance a critical factor for substitution?
A: RoHS compliance status is provided for regulatory reference. ROHS3-compliant parts (74FCT244ATSOG8, CD74FCT244ATM96, CY74FCT2244 series) are preferred for new designs. Non-compliant parts (Harris Corporation variants) may be restricted in certain markets or applications.
Q: What packaging options are available for these substitutes?
A: All listed substitutes maintain the 20-SOIC (0.295", 7.50mm Width) surface-mount package. Packaging variants (Bulk, Tube, Tape & Reel) differ only in quantity and delivery format, not in component specifications or pin configuration.
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