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74FCT2245ATSOG8 Equivalent & Substitute Parts
Part Overview
The 74FCT2245ATSOG8 is a non-inverting transceiver logic IC manufactured by Renesas Electronics Corporation, designed for 8-bit data bus applications 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 currently in Last Time Buy status, indicating end-of-life production. Identifying qualified substitute parts is essential for design continuity and long-term supply chain reliability.
Substiute Parts
Key Parameters
| Parameter | Value |
|---|---|
| Logic Type | Transceiver, Non-Inverting |
| Number of Elements | 1 |
| Number of Bits per Element | 8 |
| Output Type | 3-State |
| Voltage Supply Range | 4.75V ~ 5.25V |
| Operating Temperature Range | -40°C ~ 85°C |
| Package / Case | 20-SOIC (0.295", 7.50mm Width) |
| Mounting Type | Surface Mount |
| RoHS Status | ROHS3 Compliant |
| Moisture Sensitivity Level | 1 (Unlimited) |
Substitute Part Grouping Explanation
Substitution of the 74FCT2245ATSOG8 is determined by strict adherence to the following electrical and mechanical parameters:
Critical Matching Parameters:
- Logic Type: Transceiver, Non-Inverting
- Number of Elements: 1
- Number of Bits per Element: 8
- Output Type: 3-State
- Voltage Supply Range: 4.75V ~ 5.25V
- Package / Case: 20-SOIC (0.295", 7.50mm Width)
- Mounting Type: Surface Mount
Allowable Variations:
- Operating Temperature Range: May extend beyond -40°C ~ 85°C (wider ranges are acceptable)
- Current Output Ratings: May vary within functional limits
- Packaging Format: Tape & Reel (TR), Tube, or Bulk formats are interchangeable for the same part number
- Product Status: Active parts are preferred over Last Time Buy status
Substitute parts are grouped into two categories: Manufacturer Recommended (direct functional equivalents) and Parametric Equivalents (parts with identical core specifications but different output current ratings).
Parameter Comparison
| Part Number | Manufacturer | Logic Type | Bits per Element | Output Type | Voltage Supply | Temp Range | Current Output (High/Low) | Package | Product Status | Inventory |
|---|---|---|---|---|---|---|---|---|---|---|
| 74FCT2245ATSOG8 | Renesas Electronics | Transceiver, Non-Inverting | 8 | 3-State | 4.75V ~ 5.25V | -40°C ~ 85°C | 15mA / 12mA | 20-SOIC | Last Time Buy | 1823 Pcs |
| CD74FCT245M96 | Texas Instruments | Transceiver, Non-Inverting | 8 | 3-State | 4.75V ~ 5.25V | 0°C ~ 70°C | 15mA / 64mA | 20-SOIC | Active | 3694 Pcs |
| CY74FCT2245ATSOC | Texas Instruments | Transceiver, Non-Inverting | 8 | 3-State | 4.75V ~ 5.25V | -40°C ~ 85°C | 15mA / 12mA | 20-SOIC | Active | 2090 Pcs |
| CY74FCT2245TSOC | Texas Instruments | Transceiver, Non-Inverting | 8 | 3-State | 4.75V ~ 5.25V | -40°C ~ 85°C | 15mA / 12mA | 20-SOIC | Active | 1338 Pcs |
| CY74FCT245ATSOC | Texas Instruments | Transceiver, Non-Inverting | 8 | 3-State | 4.75V ~ 5.25V | -40°C ~ 85°C | 32mA / 64mA | 20-SOIC | Active | 1557 Pcs |
| CY74FCT245ATSOCT | Texas Instruments | Transceiver, Non-Inverting | 8 | 3-State | 4.75V ~ 5.25V | -40°C ~ 85°C | 32mA / 64mA | 20-SOIC | Active | 2000 Pcs |
| CY74FCT245CTSOC | Texas Instruments | Transceiver, Non-Inverting | 8 | 3-State | 4.75V ~ 5.25V | -40°C ~ 85°C | 32mA / 64mA | 20-SOIC | Active | 1520 Pcs |
| CY74FCT245TSOC | Cypress Semiconductor | Transceiver, Non-Inverting | 8 | 3-State | 4.75V ~ 5.25V | -40°C ~ 85°C | 32mA / 64mA | 20-SOIC | Active | 1955 Pcs |
| CY74FCT245TSOCT | Texas Instruments | Transceiver, Non-Inverting | 8 | 3-State | 4.75V ~ 5.25V | -40°C ~ 85°C | 32mA / 64mA | 20-SOIC | Active | 1153 Pcs |
| CY74FCT2245ATSOCT | Texas Instruments | Transceiver, Non-Inverting | 8 | 3-State | 4.75V ~ 5.25V | -40°C ~ 85°C | 15mA / 12mA | 20-SOIC | Active | 2608 Pcs |
| CY74FCT2245CTSOCT | Texas Instruments | Transceiver, Non-Inverting | 8 | 3-State | 4.75V ~ 5.25V | -40°C ~ 85°C | 15mA / 12mA | 20-SOIC | Active | 2980 Pcs |
Engineering Selection Recommendations
Tier 1 - Recommended Substitutes (Identical Electrical Characteristics):
CY74FCT2245ATSOC, CY74FCT2245TSOC, CY74FCT2245ATSOCT, and CY74FCT2245CTSOCT are direct functional equivalents with matching output current specifications (15mA / 12mA) and identical operating temperature range (-40°C ~ 85°C). All are Active status parts with ROHS3 compliance and unlimited moisture sensitivity rating. These parts provide the highest compatibility for direct replacement.
Tier 2 - Compatible Substitutes (Higher Output Current):
CY74FCT245ATSOC, CY74FCT245ATSOCT, CY74FCT245CTSOC, CY74FCT245TSOC, and CY74FCT245TSOCT feature increased output current ratings (32mA / 64mA) while maintaining all other critical parameters. These parts are suitable for applications where higher drive capability is beneficial or neutral. All are Active status with full compliance certifications.
Tier 3 - Limited Compatibility:
CD74FCT245M96 operates within a narrower temperature range (0°C ~ 70°C) compared to the original specification (-40°C ~ 85°C). This part is suitable only for applications that do not require extended low-temperature operation below 0°C or high-temperature operation above 70°C.
All substitute parts maintain ROHS3 compliance, REACH unaffected status, and identical package specifications (20-SOIC surface mount).
Frequently Asked Questions (FAQ)
Q: Can I use CY74FCT245ATSOC as a direct replacement for 74FCT2245ATSOG8?
A: CY74FCT245ATSOC is functionally compatible. Both are non-inverting transceivers with 8-bit capacity and 3-state output in 20-SOIC packages. The primary difference is higher output current capability (32mA / 64mA vs. 15mA / 12mA), which does not prevent substitution. Both operate across the full -40°C ~ 85°C temperature range.
Q: What is the difference between Tape & Reel (TR), Tube, and Bulk packaging formats?
A: Packaging format refers to the physical delivery method and does not affect electrical performance. Tape & Reel is suitable for automated assembly lines, Tube packaging is used for manual handling and smaller quantities, and Bulk is for large-volume applications. The same part number with different packaging formats (e.g., CY74FCT2245ATSOC vs. CY74FCT2245ATSOCT) contains identical die and electrical characteristics.
Q: Why does CD74FCT245M96 have a narrower operating temperature range?
A: CD74FCT245M96 is specified for 0°C ~ 70°C operation, which is narrower than the original 74FCT2245ATSOG8 specification of -40°C ~ 85°C. This part is suitable only for applications operating within this reduced temperature window. Applications requiring extended temperature operation must select alternatives with -40°C ~ 85°C ratings.
Q: Are all substitute parts ROHS3 compliant?
A: All listed substitute parts are ROHS3 compliant and REACH unaffected, matching the compliance status of the original 74FCT2245ATSOG8.
Q: What does "Last Time Buy" status mean for the original part?
A: Last Time Buy indicates that the 74FCT2245ATSOG8 is no longer in active production and existing inventory represents the final available stock. Designers should transition to Active status alternatives to ensure long-term supply availability.
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