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74FCT244ATSOG8 Equivalent & Substitute Parts
Part Overview
The 74FCT244ATSOG8 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 device operates at 4.75V to 5.25V supply voltage and is housed in a 20-SOIC surface mount package. The part is currently in active product status with ROHS3 compliance and unlimited moisture sensitivity level rating.
Substitute parts are necessary when the original manufacturer part becomes unavailable, when alternative packaging formats are required for production logistics, or when design requirements permit operation within the extended electrical parameter ranges of equivalent devices.
Substiute Parts
Key Parameters
| Parameter | Value |
|---|---|
| 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 |
| RoHS Status | ROHS3 Compliant |
Substitute Part Grouping Explanation
Substitution eligibility for the 74FCT244ATSOG8 is determined by the following criteria:
Electrical Compatibility Requirements:
- Logic type must be Buffer, Non-Inverting
- Number of elements: 2
- Number of bits per element: 4
- Output type: 3-State
- Supply voltage range: 4.75V ~ 5.25V
- Package / Case: 20-SOIC (0.295", 7.50mm Width)
Acceptable Variations:
- Operating temperature range may differ (0°C ~ 70°C is acceptable for applications not requiring full -40°C ~ 85°C range)
- Current output specifications may vary within the 3-state buffer classification
- Packaging format (Tube, Tape & Reel, Bulk) does not affect electrical substitution
- RoHS compliance status does not prevent substitution but should be noted for regulatory requirements
Base Product Number Consideration: Parts with base product number 74FCT244 are direct substitutes. Parts with base product number 74FCT2244 share identical functional specifications and package but may have different output current ratings.
Parameter Comparison
| Part Number | Manufacturer | Product Status | Operating Temperature | Current - Output High, Low (mA) | Packaging | RoHS Status |
|---|---|---|---|---|---|---|
| 74FCT244ATSOG8 | Renesas Electronics | Active | -40°C ~ 85°C | 15, 64 | Tape & Reel | ROHS3 Compliant |
| CD74FCT244ATM | Harris Corporation | Obsolete | 0°C ~ 70°C | 15, 64 | Tube | RoHS non-compliant |
| CD74FCT244ATM96 | Texas Instruments | Active | 0°C ~ 70°C | 15, 64 | Tape & Reel | ROHS3 Compliant |
| CD74FCT244M | Harris Corporation | Obsolete | 0°C ~ 70°C | 15, 64 | Tube | RoHS non-compliant |
| CD74FCT244M96 | Harris Corporation | Obsolete | 0°C ~ 70°C | 15, 64 | Bulk | RoHS non-compliant |
| CY74FCT2244ATSOC | Texas Instruments | Active | -40°C ~ 85°C | 15, 12 | Tube | ROHS3 Compliant |
| CY74FCT2244CTSOC | Texas Instruments | Active | -40°C ~ 85°C | 15, 12 | Tube | ROHS3 Compliant |
| CY74FCT2244TSOC | Texas Instruments | Active | -40°C ~ 85°C | 15, 12 | Tube | ROHS3 Compliant |
| CY74FCT244ATSOC | Texas Instruments | Active | -40°C ~ 85°C | 32, 64 | Tube | ROHS3 Compliant |
| CY74FCT244ATSOCT | Cypress Semiconductor | Active | -40°C ~ 85°C | 32, 64 | Bulk | Not specified |
| CY74FCT244CTSOC | Texas Instruments | Active | -40°C ~ 85°C | 32, 64 | Tube | ROHS3 Compliant |
Engineering Selection Recommendations
Primary Substitutes (Active Status, Full Temperature Range):
CD74FCT244ATM96 (Texas Instruments) is the recommended substitute when Tape & Reel packaging and active product status are required. This part maintains identical electrical specifications to the 74FCT244ATSOG8 with ROHS3 compliance. The operating temperature range is limited to 0°C ~ 70°C, which is acceptable for applications not requiring the full -40°C ~ 85°C range of the original part.
CY74FCT244ATSOC and CY74FCT244CTSOC (Texas Instruments) are suitable substitutes when higher output current capability (32mA high, 64mA low) is acceptable. Both parts maintain active product status, ROHS3 compliance, and the full -40°C ~ 85°C operating temperature range. Tube packaging is provided instead of Tape & Reel.
Secondary Substitutes (Obsolete Status):
CD74FCT244M and CD74FCT244ATM (Harris Corporation) are obsolete parts with identical electrical specifications to the 74FCT244ATSOG8 but lack ROHS3 compliance. These parts are suitable only for applications where RoHS compliance is not a regulatory requirement and where the 0°C ~ 70°C operating temperature range is sufficient.
Alternative Base Product Number (74FCT2244):
CY74FCT2244ATSOC, CY74FCT2244CTSOC, and CY74FCT2244TSOC (Texas Instruments) share the same functional configuration and package as the 74FCT244ATSOG8 but have reduced output low current (12mA versus 64mA). These parts are suitable only when the lower output current specification does not conflict with circuit load requirements.
Frequently Asked Questions (FAQ)
Q: Can I use a substitute part with a different operating temperature range?
A: Yes, if your application operates within the narrower temperature range of the substitute part. The 74FCT244ATSOG8 operates from -40°C to 85°C. Substitute parts with 0°C to 70°C range are acceptable for applications that do not require operation below 0°C or above 70°C. Verify your circuit's actual operating environment before selection.
Q: What is the difference between 74FCT244 and 74FCT2244 base product numbers?
A: Both are non-inverting buffers with 2 elements and 4 bits per element in 20-SOIC packages. The primary difference is output current capability. 74FCT244 variants typically provide 15mA high and 64mA low output current. 74FCT2244 variants provide 15mA high and 12mA low output current. Select based on your circuit's current drive requirements.
Q: Does packaging format affect electrical compatibility?
A: No. Tape & Reel, Tube, and Bulk packaging formats contain electrically identical components. Packaging selection is determined by production requirements, automated assembly compatibility, and inventory management. All three formats are electrically interchangeable.
Q: Are obsolete parts acceptable substitutes?
A: Obsolete parts such as CD74FCT244M and CD74FCT244ATM are electrically compatible but carry supply chain risk. Verify long-term availability before committing to obsolete parts in production designs. Active status parts are preferred for new designs and ongoing production.
Q: What does ROHS3 compliance mean for substitution?
A: ROHS3 compliance indicates the part meets Restriction of Hazardous Substances regulations. If your application or market requires RoHS compliance, select only substitute parts marked as ROHS3 Compliant. Non-compliant parts may not be acceptable for certain industries or regions.
Q: Can I substitute a part with higher output current capability?
A: Yes. Parts with higher output current (such as CY74FCT244ATSOC with 32mA high output) are backward compatible with circuits designed for lower current (15mA high). The higher capability provides additional drive margin. Verify that your circuit design does not depend on the specific current characteristics of the original part.
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