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Renesas 7204L12J8 Asynchronous FIFO Logic IC - Equivalent & Substitute Parts
Part Overview
The Renesas 7204L12J8 is an asynchronous FIFO (First-In-First-Out) memory IC with 36K capacity (4K x 9 bits) designed for uni-directional data buffering applications. Operating at 50MHz with 12ns access time, this component is housed in a 32-PLCC surface mount package and requires a 4.5V to 5.5V supply voltage.
The 7204L12J8 carries an obsolete product status, making identification of compatible substitute parts essential for ongoing system support, design updates, and procurement continuity. The primary substitute maintains identical electrical and mechanical specifications while offering improved compliance and availability.
Substiute Parts
Key Parameters
| Parameter | Value |
|---|---|
| Memory Size | 36K (4K x 9) |
| Function | Asynchronous |
| Data Rate | 50MHz |
| Access Time | 12ns |
| Voltage Supply Range | 4.5V ~ 5.5V |
| Maximum Supply Current | 120mA |
| Bus Directional | Uni-Directional |
| Package Type | 32-PLCC (14x11.46mm) |
| Operating Temperature Range | 0°C ~ 70°C |
| Mounting Type | Surface Mount |
Substitute Part Grouping Explanation
The 7204L12J8 has one direct substitute: the 7204L12JG8. This substitution is valid based on the following matching parameters:
- Memory capacity: 36K (4K x 9 bits)
- Asynchronous FIFO function
- Data rate: 50MHz
- Access time: 12ns
- Supply voltage range: 4.5V ~ 5.5V
- Maximum supply current: 120mA
- Uni-directional bus architecture
- Package: 32-PLCC (14x11.46mm)
- Operating temperature: 0°C ~ 70°C
- Mounting: Surface Mount
The 7204L12JG8 is electrically and mechanically interchangeable with the 7204L12J8 across all specified parameters. The primary distinction lies in product status and compliance certifications rather than functional performance.
Parameter Comparison
| Parameter | 7204L12J8 (Main) | 7204L12JG8 (Substitute) |
|---|---|---|
| Manufacturer | Renesas Electronics Corporation | Renesas Electronics Corporation |
| Memory Size | 36K (4K x 9) | 36K (4K x 9) |
| Function | Asynchronous | Asynchronous |
| Data Rate | 50MHz | 50MHz |
| Access Time | 12ns | 12ns |
| Voltage Supply | 4.5V ~ 5.5V | 4.5V ~ 5.5V |
| Supply Current (Max) | 120mA | 120mA |
| Bus Directional | Uni-Directional | Uni-Directional |
| Package / Case | 32-LCC (J-Lead) | 32-LCC (J-Lead) |
| Supplier Device Package | 32-PLCC (14x11.46) | 32-PLCC (14x11.46) |
| Operating Temperature | 0°C ~ 70°C | 0°C ~ 70°C |
| Mounting Type | Surface Mount | Surface Mount |
| Product Status | Obsolete | Active |
| RoHS Status | RoHS non-compliant | ROHS3 Compliant |
| MSL Rating | 1 (Unlimited) | 3 (168 Hours) |
| Packaging Option | Bulk | Tape & Reel (TR) |
Engineering Selection Recommendations
The 7204L12JG8 is the appropriate substitute for the obsolete 7204L12J8 based on the following factors:
Product Status: The 7204L12J8 is classified as obsolete, while the 7204L12JG8 maintains active product status with ongoing manufacturer support and availability.
Compliance: The 7204L12JG8 achieves ROHS3 compliance, whereas the 7204L12J8 is non-compliant. For applications subject to RoHS regulations or environmental standards, the 7204L12JG8 is the required choice.
Electrical Equivalence: All critical electrical parameters—memory capacity, data rate, access time, supply voltage, and current consumption—are identical between both parts, ensuring functional compatibility in existing circuit designs.
Packaging: The 7204L12JG8 is supplied in Tape & Reel format, supporting automated assembly processes. The 7204L12J8 bulk packaging is no longer preferred for modern manufacturing workflows.
Inventory: The 7204L12JG8 has higher current availability (991 pcs) compared to the 7204L12J8 (855 pcs), improving procurement reliability.
Frequently Asked Questions (FAQ)
Q: Can the 7204L12JG8 directly replace the 7204L12J8 in existing designs?
A: Yes. The 7204L12JG8 is electrically and mechanically identical to the 7204L12J8 across all specified parameters. No circuit modifications are required for substitution.
Q: What is the difference between the two part numbers?
A: The primary differences are product status (obsolete vs. active), RoHS compliance (non-compliant vs. ROHS3 compliant), MSL rating (1 vs. 3), and packaging format (bulk vs. Tape & Reel). Electrical and functional performance are identical.
Q: Are there any pin compatibility concerns?
A: No. Both parts use the identical 32-PLCC (14x11.46mm) package with J-lead configuration. Pin assignments, spacing, and footprint are identical.
Q: Does the MSL rating difference affect substitution?
A: The MSL rating difference reflects moisture sensitivity levels during storage and handling. The 7204L12JG8 (MSL 3, 168 hours) requires standard moisture control during assembly. This does not affect electrical compatibility or performance.
Q: Is the Tape & Reel packaging compatible with existing assembly equipment?
A: Tape & Reel packaging is the standard format for automated surface mount assembly. If your manufacturing process uses bulk components, reel packaging requires standard feeder compatibility, which is universal across modern assembly lines.
Q: What is the REACH and ECCN status for both parts?
A: Both parts share identical REACH (REACH Unaffected) and ECCN (EAR99) classifications, ensuring equivalent regulatory and export compliance.
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