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PI74FCT2245ATS Equivalent & Substitute Parts
Part Overview
The PI74FCT2245ATS is a non-inverting octal bidirectional transceiver manufactured by Diodes Incorporated, designed for 5V logic applications. This device features 1 element with 8 bits per element, 3-state output capability, and operates across the 4.75V to 5.25V supply voltage range. The part is classified as obsolete, making equivalent and substitute parts necessary for new designs and ongoing production requirements. Substitute parts maintain functional equivalence while offering active product status and improved compliance certifications.
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 | 4.75V ~ 5.25V |
| Package / Case | 20-SOIC (0.295", 7.50mm Width) |
| Mounting Type | Surface Mount |
| Operating Temperature Range | -40°C ~ 85°C (TA) |
| Series | 74FCT |
Substitute Part Grouping Explanation
Substitution for the PI74FCT2245ATS is determined by strict equivalence across the following critical parameters:
- Logic type: Transceiver, Non-Inverting
- Element and bit configuration: 1 element, 8 bits per element
- Output configuration: 3-State
- Supply voltage range: 4.75V ~ 5.25V
- Package: 20-SOIC form factor
- Mounting type: Surface Mount
All listed substitute parts maintain these core electrical and mechanical specifications. Variations in output current ratings (15mA/12mA vs. 15mA/64mA) and operating temperature ranges (-40°C ~ 85°C vs. 0°C ~ 70°C) are secondary considerations that do not prevent functional substitution within their respective temperature and current specifications. Packaging format (Bulk, Tube, Tape & Reel, Cut Tape) represents distribution method only and does not affect electrical compatibility.
Parameter Comparison
| Part Number | Manufacturer | Logic Type | Elements / Bits | Output Type | Supply Voltage | Temp Range | Current (High/Low) | Product Status | RoHS Status |
|---|---|---|---|---|---|---|---|---|---|
| PI74FCT2245ATS | Diodes Incorporated | Transceiver, Non-Inverting | 1 / 8 | 3-State | 4.75V ~ 5.25V | -40°C ~ 85°C | 15mA / 64mA | Obsolete | RoHS Non-Compliant |
| 74FCT2245ATSOG8 | IDT | Transceiver, Non-Inverting | 1 / 8 | 3-State | 4.75V ~ 5.25V | -40°C ~ 85°C | 15mA / 12mA | Active | ROHS3 Compliant |
| CD74FCT245M96 | Texas Instruments | Transceiver, Non-Inverting | 1 / 8 | 3-State | 4.75V ~ 5.25V | 0°C ~ 70°C | 15mA / 64mA | Active | ROHS3 Compliant |
| CY74FCT2245ATSOC | Texas Instruments | Transceiver, Non-Inverting | 1 / 8 | 3-State | 4.75V ~ 5.25V | -40°C ~ 85°C | 15mA / 12mA | Active | ROHS3 Compliant |
| CY74FCT2245ATSOCT | Texas Instruments | Transceiver, Non-Inverting | 1 / 8 | 3-State | 4.75V ~ 5.25V | -40°C ~ 85°C | 15mA / 12mA | Active | ROHS3 Compliant |
| CY74FCT2245CTSOCT | Texas Instruments | Transceiver, Non-Inverting | 1 / 8 | 3-State | 4.75V ~ 5.25V | -40°C ~ 85°C | 15mA / 12mA | Active | ROHS3 Compliant |
| CY74FCT2245TSOC | Texas Instruments | Transceiver, Non-Inverting | 1 / 8 | 3-State | 4.75V ~ 5.25V | -40°C ~ 85°C | 15mA / 12mA | Active | ROHS3 Compliant |
| CY74FCT2245TSOCT | Cypress Semiconductor Corp | Transceiver, Non-Inverting | 1 / 8 | 3-State | 4.75V ~ 5.25V | -40°C ~ 85°C | 15mA / 12mA | Active | Not Specified |
| CY74FCT245ATSOC | Texas Instruments | Transceiver, Non-Inverting | 1 / 8 | 3-State | 4.75V ~ 5.25V | -40°C ~ 85°C | 32mA / 64mA | Active | ROHS3 Compliant |
| CY74FCT245ATSOCT | Texas Instruments | Transceiver, Non-Inverting | 1 / 8 | 3-State | 4.75V ~ 5.25V | -40°C ~ 85°C | 32mA / 64mA | Active | ROHS3 Compliant |
| CY74FCT245CTSOC | Texas Instruments | Transceiver, Non-Inverting | 1 / 8 | 3-State | 4.75V ~ 5.25V | -40°C ~ 85°C | 32mA / 64mA | Active | ROHS3 Compliant |
Engineering Selection Recommendations
All substitute parts listed maintain full functional equivalence to the PI74FCT2245ATS across core electrical specifications. Selection should prioritize active product status and compliance certifications:
Primary Recommendation: Parts with ROHS3 compliance and active product status are preferred for new designs. The 74FCT2245ATSOG8 (IDT), CY74FCT2245ATSOC, CY74FCT2245ATSOCT, and CY74FCT2245CTSOCT (all Texas Instruments) offer the closest electrical match with extended temperature range support (-40°C ~ 85°C) and modern compliance certifications.
Secondary Consideration: CD74FCT245M96 (Texas Instruments) provides identical output current characteristics to the original part but operates within a narrower temperature range (0°C ~ 70°C). This part is suitable for applications not requiring extended low-temperature operation.
Current Rating Variants: CY74FCT245ATSOC, CY74FCT245ATSOCT, and CY74FCT245CTSOC feature higher output current ratings (32mA/64mA) compared to the original specification. These parts are electrically compatible and suitable for applications requiring increased drive capability.
Packaging Formats: All substitute parts are available in 20-SOIC surface mount packages. Packaging distribution methods (Bulk, Tube, Tape & Reel, Cut Tape) do not affect electrical performance and should be selected based on procurement and assembly requirements.
Frequently Asked Questions (FAQ)
Q: Can I directly replace PI74FCT2245ATS with any of the listed substitute parts?
A: Yes, all listed parts maintain electrical and mechanical compatibility. The 20-SOIC package footprint is identical across all substitutes, and the core transceiver functionality remains unchanged. Verify your application's temperature and current requirements against the specific part's datasheet specifications.
Q: What is the difference between parts with different output current ratings?
A: Output current ratings (15mA/12mA vs. 32mA/64mA) indicate the maximum current the device can source (high) or sink (low) at its outputs. Higher-rated parts provide greater drive capability but are backward compatible with designs requiring lower current. Select based on your circuit's load requirements.
Q: Why does CD74FCT245M96 have a different temperature range?
A: CD74FCT245M96 operates from 0°C to 70°C, compared to the standard -40°C to 85°C range of other substitutes. This part is suitable for commercial and industrial applications within this temperature window. For extended temperature applications, select parts with -40°C ~ 85°C ratings.
Q: Are all substitute parts RoHS compliant?
A: Most listed substitutes carry ROHS3 compliance certification. CY74FCT2245TSOCT (Cypress) does not specify RoHS status in the provided data. For applications requiring RoHS compliance, select parts explicitly marked as ROHS3 Compliant.
Q: Does packaging format (Tube, Tape & Reel, Bulk) affect compatibility?
A: No. Packaging format represents the distribution and handling method only. All formats contain electrically identical components in the same 20-SOIC package. Select packaging based on your procurement volume and assembly process requirements.
Q: Which substitute offers the best long-term availability?
A: Parts with active product status from established manufacturers (Texas Instruments, IDT, Cypress) offer superior long-term availability compared to the obsolete PI74FCT2245ATS. Texas Instruments parts (CY74FCT2245 series) show the highest inventory levels and broadest packaging options.
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