Request Quote
(Ships tomorrow)
74FCT245CTQG8 Equivalent & Substitute Parts
Part Overview
The 74FCT245CTQG8 is a non-inverting transceiver logic IC manufactured by Renesas Electronics Corporation, designed for 8-bit bidirectional data transfer with 3-state output capability. This device operates within the 4.75V to 5.25V supply voltage range and is housed in a 20-QSOP surface mount package. The part is currently in Last Time Buy status, indicating end-of-life production. Identifying equivalent and substitute parts is necessary to ensure design continuity and maintain component availability for ongoing production and maintenance requirements.
Substiute Parts
Key Parameters
| Parameter | Value |
|---|---|
| Manufacturer Part Number | 74FCT245CTQG8 |
| Manufacturer | Renesas Electronics Corporation |
| 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-SSOP (0.154", 3.90mm Width) |
| Supplier Device Package | 20-QSOP |
| RoHS Status | ROHS3 Compliant |
| Moisture Sensitivity Level (MSL) | 1 (Unlimited) |
Substitute Part Grouping Explanation
Substitution of the 74FCT245CTQG8 is determined by strict adherence to the following electrical and mechanical parameters:
Critical Parameters for Substitution:
- 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
- Operating Temperature: -40°C ~ 85°C (TA)
- RoHS Status: ROHS3 Compliant
Allowable Variations:
- Current - Output High, Low: Substitute parts may have equal or higher current ratings (15mA or 32mA for high output; 12mA or 64mA for low output)
- Package / Case: 20-SSOP or 20-QSOP configurations are interchangeable
- Moisture Sensitivity Level (MSL): MSL 1 or MSL 2 are acceptable
- Product Status: Active or Last Time Buy status parts qualify as substitutes
- Manufacturer: Texas Instruments (CY74FCT series) or Renesas Electronics Corporation
Substitute parts are grouped into two categories: Manufacturer Recommended substitutes from Texas Instruments and Parametric Equivalents from Renesas Electronics Corporation.
Parameter Comparison
| Part Number | Manufacturer | Logic Type | Output Current (High/Low) | Supply Voltage | Operating Temp | Package | Product Status | MSL |
|---|---|---|---|---|---|---|---|---|
| 74FCT245CTQG8 | Renesas | Transceiver, Non-Inverting | 15mA / 64mA | 4.75V ~ 5.25V | -40°C ~ 85°C | 20-QSOP | Last Time Buy | 1 |
| CY74FCT2245ATPWR | Texas Instruments | Transceiver, Non-Inverting | 15mA / 12mA | 4.75V ~ 5.25V | -40°C ~ 85°C | 20-TSSOP | Active | 1 |
| CY74FCT2245ATQCT | Texas Instruments | Transceiver, Non-Inverting | 15mA / 12mA | 4.75V ~ 5.25V | -40°C ~ 85°C | 20-SSOP | Active | 2 |
| CY74FCT2245CTQCT | Texas Instruments | Transceiver, Non-Inverting | 15mA / 12mA | 4.75V ~ 5.25V | -40°C ~ 85°C | 20-SSOP | Active | 2 |
| CY74FCT2245TQCT | Texas Instruments | Transceiver, Non-Inverting | 15mA / 12mA | 4.75V ~ 5.25V | -40°C ~ 85°C | 20-SSOP | Active | 1 |
| CY74FCT245ATQCT | Texas Instruments | Transceiver, Non-Inverting | 32mA / 64mA | 4.75V ~ 5.25V | -40°C ~ 85°C | 20-SSOP | Active | 2 |
| CY74FCT245CTQCT | Texas Instruments | Transceiver, Non-Inverting | 32mA / 64mA | 4.75V ~ 5.25V | -40°C ~ 85°C | 20-SSOP | Active | 2 |
| CY74FCT245DTQCT | Texas Instruments | Transceiver, Non-Inverting | 32mA / 64mA | 4.75V ~ 5.25V | -40°C ~ 85°C | 20-SSOP | Discontinued at DiGi Electronics | 2 |
| CY74FCT245TQCT | Texas Instruments | Transceiver, Non-Inverting | 32mA / 64mA | 4.75V ~ 5.25V | -40°C ~ 85°C | 20-SSOP | Active | 2 |
| 74FCT245ATQG8 | Renesas | Transceiver, Non-Inverting | 15mA / 64mA | 4.75V ~ 5.25V | -40°C ~ 85°C | 20-QSOP | Active | 1 |
Engineering Selection Recommendations
Primary Recommendation: 74FCT245ATQG8
The 74FCT245ATQG8 from Renesas Electronics Corporation is the parametric equivalent with identical electrical specifications and package configuration. This part maintains the same output current ratings (15mA / 64mA), supply voltage range, operating temperature, and MSL rating as the original 74FCT245CTQG8. The primary advantage is Active product status, ensuring long-term availability compared to the Last Time Buy status of the original part.
Secondary Recommendations: Texas Instruments CY74FCT Series
Texas Instruments CY74FCT2245 and CY74FCT245 series parts provide functional equivalence with the following considerations:
- CY74FCT2245ATPWR and CY74FCT2245TQCT offer reduced output low current (12mA vs. 64mA), suitable for applications not requiring maximum sink current capability.
- CY74FCT245ATQCT and CY74FCT245CTQCT provide matched output current ratings (32mA / 64mA) with Active product status and ROHS3 compliance.
- All Texas Instruments substitutes maintain identical supply voltage, operating temperature range, and 3-state output functionality.
Packaging Considerations:
The original 74FCT245CTQG8 uses 20-QSOP packaging. The 74FCT245ATQG8 maintains this package type. Texas Instruments alternatives use 20-SSOP or 20-TSSOP packages, which have different physical dimensions (0.154" to 0.173" width) and require PCB layout verification for mechanical compatibility.
Compliance Status:
All recommended substitutes maintain ROHS3 compliance and REACH unaffected status, consistent with the original part specifications.
Frequently Asked Questions (FAQ)
Q: Can I use CY74FCT2245ATPWR as a direct replacement for 74FCT245CTQG8?
A: CY74FCT2245ATPWR is functionally equivalent in logic operation and electrical characteristics but has reduced output low current (12mA vs. 64mA). This substitution is valid only if your circuit design does not require the full 64mA sink current capability. The package type differs (20-TSSOP vs. 20-QSOP), requiring PCB layout verification.
Q: What is the difference between 20-QSOP and 20-SSOP packages?
A: Both are 20-pin surface mount packages with identical pin counts and pitch. The primary difference is package width: 20-QSOP is 3.90mm wide, while 20-SSOP is 3.90mm wide (same dimension). 20-TSSOP is 4.40mm wide. Physical footprint compatibility must be verified during PCB layout.
Q: Is 74FCT245ATQG8 a better choice than the original 74FCT245CTQG8?
A: 74FCT245ATQG8 is electrically and mechanically identical to the original part but carries Active product status instead of Last Time Buy. This ensures continued availability and manufacturing support, making it the preferred long-term solution.
Q: Why do some substitutes have different output current ratings?
A: Output current ratings reflect the maximum current the device can source (high) or sink (low) at the output pins. Higher ratings provide greater drive capability. Substitutes with equal or higher ratings are acceptable; lower ratings require circuit design verification to ensure adequate current delivery.
Q: Are all substitutes ROHS3 compliant?
A: Yes. All recommended substitutes maintain ROHS3 compliance and REACH unaffected status, consistent with environmental and regulatory requirements.
Q: Can I use CY74FCT245DTQCT as a substitute?
A: CY74FCT245DTQCT is electrically equivalent but carries Discontinued at DiGi Electronics status. While current inventory exists, this part is not recommended for new designs due to limited long-term availability.
Alternative Parts
SJ6012L2TP
Littelfuse Inc.
6 Alternative Parts
JMK107BBJ476MA-RE
Taiyo Yuden
10 Alternative Parts
GMK107BBJ475MA-T
Taiyo Yuden
5 Alternative Parts
SJ6020N2ARP
Littelfuse Inc.
3 Alternative Parts
SJ6025R2ATP
Littelfuse Inc.
4 Alternative Parts
2474-05L
API Delevan Inc.
1 Alternative Parts
4590R-684K
API Delevan Inc.
1 Alternative Parts
CM6560R-334
API Delevan Inc.
1 Alternative Parts
CM6460-104
API Delevan Inc.
1 Alternative Parts
5526-12
API Delevan Inc.
1 Alternative Parts