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PI74FCT245ATQE Equivalent & Substitute Parts
Part Overview
The PI74FCT245ATQE is a non-inverting octal bidirectional transceiver manufactured by Diodes Incorporated, designed for 5V logic applications. This component features 1 element with 8 bits per element, 3-state output capability, and operates across the -40°C to 85°C temperature range. The part is classified as obsolete, making equivalent and substitute parts necessary for ongoing design support and procurement.
Substiute Parts
Key Parameters
| Parameter | Value |
|---|---|
| Manufacturer Part Number | PI74FCT245ATQE |
| Base Product Number | 74FCT245 |
| 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) |
| Mounting Type | Surface Mount |
| Package / Case | 20-SSOP (0.154", 3.90mm Width) |
| Product Status | Obsolete |
| RoHS Status | ROHS3 Compliant |
| Moisture Sensitivity Level (MSL) | 1 (Unlimited) |
Substitute Part Grouping Explanation
Substitution for the PI74FCT245ATQE is determined by the following critical parameters:
Primary Substitution Criteria:
- Base product number (74FCT245 series)
- Logic type (Transceiver, Non-Inverting)
- Number of elements (1) and bits per element (8)
- Output type (3-State)
- Supply voltage range (4.75V ~ 5.25V)
- Operating temperature range (-40°C ~ 85°C)
- Output current specifications (15mA high / 64mA low)
- Surface mount packaging
Package Compatibility: The PI74FCT245ATQE uses 20-SSOP (0.154", 3.90mm Width) packaging. Direct pin-compatible substitutes maintain this package footprint. Alternatives with 20-TSSOP (0.173", 4.40mm Width) packaging require PCB layout verification due to different body width.
Voltage and Current Considerations: Parts operating at reduced voltage ranges (2.7V ~ 3.6V) such as the 74FCT3245 series are not direct substitutes for 5V applications and require circuit redesign.
Parameter Comparison
| Part Number | Manufacturer | Logic Type | Output Current (High/Low) | Supply Voltage | Package | Product Status | Packaging Type |
|---|---|---|---|---|---|---|---|
| PI74FCT245ATQE | Diodes Incorporated | Transceiver, Non-Inverting | 15mA / 64mA | 4.75V ~ 5.25V | 20-SSOP (0.154") | Obsolete | - |
| 74FCT245ATPGG | IDT | Transceiver, Non-Inverting | 15mA / 64mA | 4.75V ~ 5.25V | 20-TSSOP (0.173") | Active | Bulk |
| 74FCT245ATQG8 | Renesas Electronics | Transceiver, Non-Inverting | 15mA / 64mA | 4.75V ~ 5.25V | 20-SSOP (0.154") | Active | Tape & Reel (TR) |
| 74FCT245CTQG8 | IDT | Transceiver, Non-Inverting | 15mA / 64mA | 4.75V ~ 5.25V | 20-SSOP (0.154") | Active | Bulk |
| CY74FCT2245ATPWR | Texas Instruments | Transceiver, Non-Inverting | 15mA / 12mA | 4.75V ~ 5.25V | 20-TSSOP (0.173") | Active | Tape & Reel (TR) |
| CY74FCT2245ATQCT | Texas Instruments | Transceiver, Non-Inverting | 15mA / 12mA | 4.75V ~ 5.25V | 20-SSOP (0.154") | Active | Tape & Reel (TR) |
| CY74FCT2245CTQCT | Texas Instruments | Transceiver, Non-Inverting | 15mA / 12mA | 4.75V ~ 5.25V | 20-SSOP (0.154") | Active | Cut Tape (CT) & Digi-Reel® |
| CY74FCT2245TQCT | Texas Instruments | Transceiver, Non-Inverting | 15mA / 12mA | 4.75V ~ 5.25V | 20-SSOP (0.154") | Active | Tape & Reel (TR) |
| CY74FCT245ATQCT | Texas Instruments | Transceiver, Non-Inverting | 32mA / 64mA | 4.75V ~ 5.25V | 20-SSOP (0.154") | Active | Tape & Reel (TR) |
Engineering Selection Recommendations
Direct Pin-Compatible Substitutes (20-SSOP Package):
For applications requiring identical footprint compatibility with the PI74FCT245ATQE, select from parts maintaining 20-SSOP (0.154", 3.90mm Width) packaging:
- 74FCT245ATQG8 (Renesas Electronics) - Active product status, matching output current specifications (15mA / 64mA), ROHS3 compliant, MSL 1
- 74FCT245CTQG8 (IDT) - Active product status, matching output current specifications (15mA / 64mA), ROHS3 compliant
- CY74FCT2245ATQCT (Texas Instruments) - Active product status, reduced output low current (12mA vs 64mA), ROHS3 compliant, MSL 2
- CY74FCT2245CTQCT (Texas Instruments) - Active product status, reduced output low current (12mA vs 64mA), ROHS3 compliant, MSL 2
- CY74FCT2245TQCT (Texas Instruments) - Active product status, reduced output low current (12mA vs 64mA), ROHS3 compliant, MSL 1
- CY74FCT245ATQCT (Texas Instruments) - Active product status, enhanced output current (32mA / 64mA), ROHS3 compliant, MSL 2
Package Footprint Alternatives (20-TSSOP Package):
For designs permitting PCB layout modification to accommodate 20-TSSOP (0.173", 4.40mm Width) packaging:
- 74FCT245ATPGG (IDT) - Active product status, matching output current specifications (15mA / 64mA), ROHS3 compliant
- CY74FCT2245ATPWR (Texas Instruments) - Active product status, reduced output low current (15mA / 12mA), ROHS3 compliant, MSL 1
All recommended substitutes maintain the same logic type, element count, bit width, 3-state output configuration, supply voltage range, and operating temperature specifications as the original PI74FCT245ATQE.
Frequently Asked Questions (FAQ)
Q: Can I use a 74FCT3245 series part as a substitute for the PI74FCT245ATQE?
A: No. The 74FCT3245 series operates at reduced supply voltage (2.7V ~ 3.6V) compared to the PI74FCT245ATQE (4.75V ~ 5.25V). These parts are not compatible with 5V logic systems and require circuit redesign.
Q: What is the difference between 20-SSOP and 20-TSSOP packaging?
A: The 20-SSOP package has a body width of 0.154" (3.90mm), while the 20-TSSOP package has a body width of 0.173" (4.40mm). Both are surface mount packages with 20 pins. Direct footprint substitution requires matching package type. If using a different package, PCB layout verification is necessary.
Q: Are there output current differences between substitute options?
A: Yes. The PI74FCT245ATQE specifies 15mA output high and 64mA output low. The CY74FCT2245 series variants specify 15mA output high and 12mA output low, representing reduced output low current. The CY74FCT245ATQCT specifies 32mA output high and 64mA output low, representing enhanced output high current. Verify that your circuit design accommodates these current specifications.
Q: What does product status "Active" mean compared to "Obsolete"?
A: Active products are currently manufactured and supported by the supplier with ongoing availability. Obsolete products are no longer manufactured. All recommended substitutes carry Active status, ensuring long-term procurement availability.
Q: Do all substitute parts meet RoHS3 compliance?
A: Yes. All recommended substitute parts listed carry ROHS3 Compliant certification, matching the compliance status of the original PI74FCT245ATQE.
Q: What is Moisture Sensitivity Level (MSL) and why does it vary?
A: MSL indicates the maximum time a component can be exposed to moisture before soldering. MSL 1 (Unlimited) allows indefinite storage without moisture control. MSL 2 (1 Year) requires moisture control measures. Select based on your storage and handling procedures.
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