SN74ACT7805-25DL Equivalent & Substitute Parts

Part Overview

The SN74ACT7805-25DL is a Synchronous FIFO logic integrated circuit manufactured by Texas Instruments, featuring 4.5K memory capacity (256 x 18 bits) with 15ns access time and 40MHz data rate. The device is packaged in a 56-BSSOP surface mount package and operates across the 4.5V to 5.5V supply voltage range. This part is classified as Obsolete, making identification of functionally equivalent alternatives essential for ongoing system support and new design implementations.

Substiute Parts

SN74ACT7805-25DL

Texas InstrumentsIn Stock: 2151SN74ACT7805-25DL Datasheet

Current PartRFQ

SN74ACT7803-25DL

Texas InstrumentsIn Stock: 2034SN74ACT7803-25DL Datasheet

DirectRFQ

SN74ACT7806-20DL

Texas InstrumentsIn Stock: 2429SN74ACT7806-20DL Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the SN74ACT7805-25DL is determined by the following critical parameters:

Primary Compatibility Criteria:

• Package / Case: 56-BSSOP surface mount form factor
• Voltage - Supply: 4.5V ~ 5.5V operating range
• Bus Directional: Uni-Directional configuration
• Expansion Type: Width
• Mounting Type: Surface Mount

Secondary Compatibility Criteria:

• Memory Size: 4.5K (256 x 18) capacity
• Access Time: 15ns maximum
• Current - Supply (Max): 400µA
• Operating Temperature: 0°C ~ 70°C
• RoHS Status: ROHS3 Compliant

Substitute parts must maintain compatibility across all primary criteria. Variations in Function (Synchronous vs. Asynchronous), Data Rate, and Product Status are noted as engineering trade-offs that may be acceptable depending on application requirements.

Parameter Comparison

Engineering Selection Recommendations

SN74ACT7803-25DL (Direct Substitute - Same Function, Increased Capacity)

This part maintains identical Synchronous FIFO function, access time, and data rate as the SN74ACT7805-25DL. The primary difference is doubled memory capacity (9K vs. 4.5K). Both parts share Obsolete product status and ROHS3 compliance. Selection of this substitute is appropriate when system architecture can accommodate the larger memory footprint without redesign.

SN74ACT7806-20DL (Manufacturer Recommended - Active Status)

This part offers Active product status, providing superior long-term availability compared to the Obsolete SN74ACT7805-25DL. It maintains identical memory capacity, access time, voltage supply range, and package form factor. The functional difference is Asynchronous operation versus Synchronous, and increased data rate capability (50MHz vs. 40MHz). This substitute is recommended for new designs and legacy system refreshes where Asynchronous FIFO operation is compatible with system timing requirements.

Frequently Asked Questions (FAQ)

Q: Can SN74ACT7803-25DL replace SN74ACT7805-25DL in existing designs?

A: Yes, provided the application can accommodate the increased memory capacity (9K vs. 4.5K). Both parts are Synchronous FIFOs with identical access time (15ns), data rate (40MHz), supply voltage range (4.5V ~ 5.5V), and 56-BSSOP package. Pin-level compatibility must be verified against the specific application schematic.

Q: What is the primary advantage of SN74ACT7806-20DL?

A: The SN74ACT7806-20DL carries Active product status, ensuring continued manufacturing and availability. It maintains the same memory capacity and package as the original SN74ACT7805-25DL. The trade-off is Asynchronous operation instead of Synchronous, which may require system timing analysis to confirm compatibility.

Q: Are all three parts RoHS compliant?

A: Yes. SN74ACT7805-25DL, SN74ACT7803-25DL, and SN74ACT7806-20DL are all ROHS3 Compliant with Moisture Sensitivity Level 1 (Unlimited).

Q: Does package compatibility extend beyond form factor?

A: All three parts use the 56-BSSOP (0.295", 7.50mm Width) package. Surface mount assembly processes and PCB footprints are identical. Pin assignment compatibility must be confirmed through datasheet cross-reference.

Q: Which substitute is recommended for new product development?

A: SN74ACT7806-20DL is recommended for new designs due to Active product status and higher data rate capability (50MHz). This ensures component availability throughout the product lifecycle.