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PI74FCT245TSEX Equivalent & Substitute Parts
Part Overview
The PI74FCT245TSEX is a non-inverting octal bus transceiver manufactured by Diodes Incorporated, designed for 3-state output applications in 20-SOIC surface mount packaging. This part operates within the 4.75V to 5.25V supply voltage range and supports bidirectional data transfer with 8-bit per element configuration. The device is currently classified as obsolete, making equivalent and substitute parts necessary for ongoing design support and procurement.
Substiute Parts
Key Parameters
| Parameter | Value |
|---|---|
| Manufacturer Part Number | PI74FCT245TSEX |
| Manufacturer | Diodes Incorporated |
| Logic Type | Transceiver, Non-Inverting |
| Number of Elements | 1 |
| Number of Bits per Element | 8 |
| 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 PI74FCT245TSEX is determined by the following critical parameters:
Primary Compatibility Criteria:
- Logic Type: Transceiver, Non-Inverting
- Number of Elements: 1
- Number of Bits per Element: 8
- Output Type: 3-State
- Package / Case: 20-SOIC (0.295", 7.50mm Width)
- Voltage - Supply: 4.75V ~ 5.25V
- Mounting Type: Surface Mount
Secondary Compatibility Criteria:
- Current - Output High, Low: 15mA, 64mA (primary specification)
- Operating Temperature: -40°C ~ 85°C (TA) (primary specification)
Substitute parts are grouped into two categories based on output current specifications:
Category A - Direct Current Match (15mA High, 64mA Low): Parts with identical output current ratings to the PI74FCT245TSEX, maintaining full electrical equivalence.
Category B - Alternative Current Specifications (15mA High, 12mA Low): Parts with reduced low-side output current (12mA instead of 64mA), suitable for applications with lower current requirements. These parts use the 74FCT2245 base product number variant.
All substitute parts maintain identical supply voltage range, operating temperature range, package configuration, and 3-state output functionality.
Parameter Comparison
| Part Number | Manufacturer | Product Status | Output Current (High, Low) | Operating Temperature | Base Product | Packaging |
|---|---|---|---|---|---|---|
| PI74FCT245TSEX | Diodes Incorporated | Obsolete | 15mA, 64mA | -40°C ~ 85°C | 74FCT245 | 20-SOIC |
| 74FCT245ATSOG | Renesas Electronics | Active | 15mA, 64mA | -40°C ~ 85°C | 74FCT245 | 20-SOIC |
| CD74FCT245M96 | Texas Instruments | Active | 15mA, 64mA | 0°C ~ 70°C | 74FCT245 | 20-SOIC |
| CY74FCT245ATSOC | Texas Instruments | Active | 32mA, 64mA | -40°C ~ 85°C | 74FCT245 | 20-SOIC |
| CY74FCT245ATSOCT | Texas Instruments | Active | 32mA, 64mA | -40°C ~ 85°C | 74FCT245 | 20-SOIC |
| 74FCT2245ATSOG8 | IDT, Integrated Device Technology | Active | 15mA, 12mA | -40°C ~ 85°C | 74FCT2245 | 20-SOIC |
| CY74FCT2245ATSOC | Texas Instruments | Active | 15mA, 12mA | -40°C ~ 85°C | 74FCT2245 | 20-SOIC |
| CY74FCT2245ATSOCT | Texas Instruments | Active | 15mA, 12mA | -40°C ~ 85°C | 74FCT2245 | 20-SOIC |
| CY74FCT2245CTSOCT | Texas Instruments | Active | 15mA, 12mA | -40°C ~ 85°C | 74FCT2245 | 20-SOIC |
| CY74FCT2245TSOC | Texas Instruments | Active | 15mA, 12mA | -40°C ~ 85°C | 74FCT2245 | 20-SOIC |
| CY74FCT2245TSOCT | Cypress Semiconductor | Active | 15mA, 12mA | -40°C ~ 85°C | 74FCT2245 | 20-SOIC |
Engineering Selection Recommendations
For Direct Replacement (Identical Electrical Performance):
The 74FCT245ATSOG from Renesas Electronics Corporation is the primary direct substitute. It maintains identical output current specifications (15mA, 64mA), operating temperature range (-40°C ~ 85°C), and supply voltage (4.75V ~ 5.25V). Both parts use the 74FCT245 base product number and are housed in 20-SOIC packaging. This part is currently in active production status with 666 units available.
For Extended Temperature Range Applications:
The CD74FCT245M96 from Texas Instruments provides identical output current characteristics but operates within a narrower temperature range (0°C ~ 70°C). This part is suitable only for applications that do not require the full -40°C ~ 85°C operating range. It is available in active status with 3694 units in stock.
For Reduced Output Current Applications:
The 74FCT2245 series variants (74FCT2245ATSOG8, CY74FCT2245ATSOC, CY74FCT2245ATSOCT, CY74FCT2245CTSOCT, CY74FCT2245TSOC, CY74FCT2245TSOCT) provide reduced low-side output current (12mA instead of 64mA). These parts are suitable for applications where lower output current is acceptable and maintain the full -40°C ~ 85°C operating temperature range. All are in active production status.
Compliance Considerations:
All recommended substitute parts maintain ROHS3 compliance and REACH unaffected status, consistent with the original PI74FCT245TSEX specifications. All parts carry EAR99 ECCN classification.
Frequently Asked Questions (FAQ)
Q: Can I use a 74FCT2245 series part as a direct replacement for the PI74FCT245TSEX?
A: The 74FCT2245 series parts are functionally compatible but have reduced output current specifications (12mA low-side instead of 64mA). They are suitable only if your application does not require the full 64mA output current capability. All other electrical and mechanical parameters remain compatible.
Q: What is the difference between the 74FCT245 and 74FCT2245 base product numbers?
A: The primary difference is output current capability. The 74FCT245 series provides 15mA high-side and 64mA low-side output current. The 74FCT2245 series provides 15mA high-side and 12mA low-side output current. Both maintain identical logic functionality, package configuration, and voltage specifications.
Q: Are all substitute parts available in the same 20-SOIC package?
A: Yes. All listed substitute parts are housed in 20-SOIC (0.295", 7.50mm Width) surface mount packaging, maintaining identical PCB footprint compatibility with the original PI74FCT245TSEX.
Q: Does the operating temperature range affect substitution compatibility?
A: The CD74FCT245M96 operates within 0°C ~ 70°C, which is narrower than the PI74FCT245TSEX range of -40°C ~ 85°C. This part is suitable only for applications that do not require operation below 0°C or above 70°C. All other substitute parts maintain the full -40°C ~ 85°C range.
Q: Are there differences in packaging formats among the substitute parts?
A: Yes. Substitute parts are available in different packaging formats: Bulk, Tube, Tape & Reel (TR), and Cut Tape (CT) & Digi-Reel. The packaging format does not affect electrical compatibility but may influence procurement and handling requirements. Select based on your assembly process requirements.
Q: What is the significance of the CY prefix in part numbers like CY74FCT245ATSOC?
A: The CY prefix indicates Texas Instruments or Cypress Semiconductor manufacturing. These parts maintain identical electrical specifications and 20-SOIC package configuration as other 74FCT245 variants. The prefix does not affect functional compatibility.
Q: Can I mix different substitute parts in the same design?
A: Yes, provided all parts meet your application's current and temperature requirements. However, for consistency and supply chain management, it is recommended to standardize on a single substitute part number within a design.
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