SN74ACT7805-15DL Equivalent & Substitute Parts

Part Overview

The SN74ACT7805-15DL is a Synchronous FIFO (First-In-First-Out) memory circuit manufactured by Texas Instruments, configured as 256 x 18 bits with 4.5K total memory capacity. This device operates at 67MHz with a 12ns access time and is housed in a 56-SSOP surface mount package. The part is currently classified as obsolete, making identification of compatible substitute components essential for ongoing system support and new design implementations.

Substiute Parts

SN74ACT7805-15DL

Texas InstrumentsIn Stock: 751SN74ACT7805-15DL Datasheet

Current PartRFQ

SN74ACT7803-15DL

Texas InstrumentsIn Stock: 1117SN74ACT7803-15DL Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

The SN74ACT7803-15DL qualifies as a direct substitute based on the following critical parameters that determine functional compatibility:

Matching Parameters:

• Manufacturer: Texas Instruments (same source)
• Function: Synchronous FIFO (identical architecture)
• Data Rate: 67MHz (identical performance)
• Access Time: 12ns (identical timing)
• Supply Voltage: 4.5V ~ 5.5V (identical electrical requirements)
• Maximum Supply Current: 400µA (identical power consumption)
• Bus Directional: Uni-Directional (identical configuration)
• Package / Case: 56-BSSOP (identical physical form factor)
• Operating Temperature: 0°C ~ 70°C (identical thermal range)
• RoHS Status: ROHS3 Compliant (identical compliance)
• Moisture Sensitivity Level: 1 (identical handling requirements)

Distinguishing Parameter:

• Memory Size: SN74ACT7803-15DL provides 512 x 18 (9K) versus 256 x 18 (4.5K) in the original part

The SN74ACT7803-15DL maintains all electrical, mechanical, and thermal specifications while offering double the memory capacity. This substitution is valid for applications where increased FIFO depth does not create system conflicts.

Parameter Comparison

Engineering Selection Recommendations

The SN74ACT7803-15DL is the appropriate substitute for the obsolete SN74ACT7805-15DL. Both devices maintain identical electrical specifications, thermal operating ranges, and physical packaging. The SN74ACT7803-15DL carries Active product status, ensuring continued availability and manufacturing support from Texas Instruments. Both parts are ROHS3 compliant and carry identical moisture sensitivity classifications, confirming equivalent handling and storage requirements. The increased memory capacity of the SN74ACT7803-15DL (9K versus 4.5K) provides additional buffering capability without introducing electrical or mechanical incompatibilities.

Frequently Asked Questions (FAQ)

Q: Can the SN74ACT7803-15DL directly replace the SN74ACT7805-15DL in existing designs?

A: Yes. Both devices share identical electrical specifications, supply voltage requirements, data rates, access times, and physical packaging. The 56-BSSOP package dimensions and pin configurations are compatible. The primary difference is memory capacity, where the substitute provides double the storage depth.

Q: What is the significance of the memory capacity difference between these parts?

A: The SN74ACT7805-15DL provides 256 x 18 bits (4.5K total), while the SN74ACT7803-15DL provides 512 x 18 bits (9K total). In FIFO applications, increased depth allows longer data buffering without overflow. This substitution is valid provided the system design does not depend on the specific 256-word depth limitation.

Q: Are the package dimensions identical?

A: Yes. Both parts use the 56-BSSOP package with 0.295" width and 7.50mm physical dimensions. Pin-to-pin compatibility is maintained.

Q: What is the product status difference, and why does it matter?

A: The SN74ACT7805-15DL is classified as Obsolete, indicating Texas Instruments has discontinued production and support. The SN74ACT7803-15DL maintains Active status, ensuring ongoing availability, manufacturing support, and compliance documentation from the manufacturer.

Q: Are compliance certifications identical between these parts?

A: Yes. Both devices are ROHS3 compliant, carry Moisture Sensitivity Level 1 (Unlimited), and are REACH Unaffected. Handling, storage, and environmental compliance requirements are equivalent.