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54FCT240TDB Equivalent & Substitute Parts
Part Overview
The 54FCT240TDB is an inverting buffer logic IC manufactured by Renesas Electronics Corporation, designed for 5.5V operation with 2 elements and 4 bits per element in a 20-CDIP package. This part is classified as obsolete, making equivalent and substitute parts necessary for ongoing system support and new designs. The 3-state output configuration enables bus-oriented applications requiring controlled signal distribution.
Substiute Parts
Key Parameters
| Parameter | Value |
|---|---|
| Logic Type | Buffer, Inverting |
| Number of Elements | 2 |
| Number of Bits per Element | 4 |
| Output Type | 3-State |
| Current - Output High, Low | 12mA, 48mA |
| Voltage - Supply | 4.5V ~ 5.5V |
| Operating Temperature | -55°C ~ 125°C (TA) |
| Package / Case | 20-CDIP (0.300", 7.62mm) |
| Mounting Type | Through Hole |
Substitute Part Grouping Explanation
Substitute parts for the 54FCT240TDB are qualified based on strict parametric equivalence across the following criteria:
- Logic function: Buffer, Inverting configuration
- Element and bit architecture: 2 elements with 4 bits per element
- Output control: 3-state output capability
- Electrical performance: 12mA high output current and 48mA low output current
- Supply voltage range: 4.5V to 5.5V operation
- Temperature range: -55°C to 125°C (TA)
- Physical form factor: 20-CDIP package with 0.300" (7.62mm) spacing
- Mounting technology: Through-hole configuration
All listed substitutes maintain identical functional and electrical specifications, ensuring direct replacement capability in existing circuit designs.
Parameter Comparison
| Parameter | 54FCT240TDB (Renesas) | M38510/38301BRA (TI) | SN54F240J (TI) | SNJ54BCT240J (TI) |
|---|---|---|---|---|
| Logic Type | Buffer, Inverting | Buffer, Inverting | Buffer, Inverting | Buffer, Inverting |
| Number of Elements | 2 | 2 | 2 | 2 |
| Number of Bits per Element | 4 | 4 | 4 | 4 |
| Output Type | 3-State | 3-State | 3-State | 3-State |
| Current - Output High, Low | 12mA, 48mA | 12mA, 48mA | 12mA, 48mA | 12mA, 48mA |
| Voltage - Supply | 4.5V ~ 5.5V | 4.5V ~ 5.5V | 4.5V ~ 5.5V | 4.5V ~ 5.5V |
| Operating Temperature | -55°C ~ 125°C (TA) | -55°C ~ 125°C (TA) | -55°C ~ 125°C (TA) | -55°C ~ 125°C (TA) |
| Package / Case | 20-CDIP (0.300", 7.62mm) | 20-CDIP (0.300", 7.62mm) | 20-CDIP (0.300", 7.62mm) | 20-CDIP (0.300", 7.62mm) |
| Mounting Type | Through Hole | Through Hole | Through Hole | Through Hole |
| Product Status | Obsolete | Active | Active | Active |
| RoHS Status | RoHS non-compliant | ROHS3 Compliant | ROHS3 Compliant | Not specified |
Engineering Selection Recommendations
All three substitute parts—M38510/38301BRA, SN54F240J, and SNJ54BCT240J—provide complete parametric equivalence to the 54FCT240TDB. Selection should prioritize active product status and compliance certifications:
M38510/38301BRA and SN54F240J both carry ROHS3 compliance certification, making them suitable for applications requiring environmental compliance. Both parts are in active production status with established supply chains.
SNJ54BCT240J remains in active status and offers an alternative selection path, though specific RoHS compliance information is not provided in the available data.
For new designs or long-term production requirements, M38510/38301BRA or SN54F240J are preferred due to confirmed ROHS3 compliance and active product status. All three parts are functionally and electrically interchangeable with the obsolete 54FCT240TDB.
Frequently Asked Questions (FAQ)
Q: Can the SN54F240J directly replace the 54FCT240TDB in existing designs?
A: Yes. The SN54F240J maintains identical electrical specifications, output drive capabilities, supply voltage range, operating temperature range, and 20-CDIP package configuration. Direct socket substitution is supported.
Q: What is the difference between M38510/38301BRA and SN54F240J?
A: Both parts are parametrically equivalent and functionally interchangeable. M38510/38301BRA is designated as a military-grade part within the 54ALS series, while SN54F240J operates within the 54F series. Both provide ROHS3 compliance and active product status.
Q: Is the SNJ54BCT240J compatible with the original 54FCT240TDB?
A: Yes. The SNJ54BCT240J maintains all critical electrical and functional parameters required for substitution. It operates within the same voltage and temperature ranges and provides identical output drive characteristics in the same 20-CDIP package.
Q: Why is the 54FCT240TDB listed as obsolete?
A: Obsolete status indicates the part is no longer manufactured by Renesas Electronics Corporation. Active substitute parts from Texas Instruments ensure continued availability for system support and new production requirements.
Q: Are there any package or pinout differences between these parts?
A: No. All parts use the 20-CDIP (0.300", 7.62mm) through-hole package with identical pinout configuration, enabling direct mechanical and electrical substitution.
Q: Which substitute part should be selected for new designs?
A: M38510/38301BRA or SN54F240J are recommended for new designs due to active product status and confirmed ROHS3 compliance certification. Both ensure long-term supply availability and environmental regulatory compliance.
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