SN74ALVC7803-20DL Equivalent & Substitute Parts

Part Overview

The SN74ALVC7803-20DL is a Synchronous FIFO (First-In-First-Out) memory circuit manufactured by Texas Instruments, configured as a 9K (512 x 18) uni-directional buffer with 13ns access time and 50MHz data rate. This component operates at 3.0V to 3.6V supply voltage and is housed in a 56-SSOP surface mount package. The part is currently classified as obsolete, making identification of compatible substitutes essential for ongoing system support and new design implementations.

Substiute Parts

SN74ALVC7803-20DL

Texas InstrumentsIn Stock: 901SN74ALVC7803-20DL Datasheet

Current PartRFQ

SN74ACT7803-15DL

Texas InstrumentsIn Stock: 1117SN74ACT7803-15DL Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the SN74ALVC7803-20DL is determined by the following critical parameters:

Mandatory Compatibility Parameters:

• Memory configuration: 9K (512 x 18)
• Function type: Synchronous FIFO
• Bus directional: Uni-Directional
• Expansion type: Width
• Programmable flags support: Yes
• Package type: 56-BSSOP (0.295", 7.50mm Width)
• Operating temperature range: 0°C to 70°C

Performance Parameters (Allowable Variation):

• Data rate and access time may vary within system timing requirements
• Supply voltage range may differ if system design accommodates the alternative voltage specification
• Maximum supply current may increase within power budget constraints

The SN74ACT7803-15DL qualifies as a substitute based on matching all mandatory compatibility parameters while offering improved performance characteristics in data rate (67MHz vs. 50MHz) and access time (12ns vs. 13ns).

Parameter Comparison

Engineering Selection Recommendations

The SN74ACT7803-15DL is available as an active product from Texas Instruments, whereas the SN74ALVC7803-20DL is obsolete. Both components maintain ROHS3 compliance and identical moisture sensitivity ratings, ensuring equivalent environmental and regulatory standing.

Selection between these parts depends on system voltage specifications. The SN74ALVC7803-20DL operates at 3.0V to 3.6V, suitable for low-voltage applications. The SN74ACT7803-15DL requires 4.5V to 5.5V operation and draws higher supply current (400µA vs. 40µA). Systems designed for 3.0V to 3.6V operation cannot directly substitute the SN74ACT7803-15DL without voltage regulation modifications. Conversely, systems operating at 4.5V to 5.5V can adopt the SN74ACT7803-15DL as a direct replacement, gaining improved performance metrics and active product status.

Frequently Asked Questions (FAQ)

Q: Can the SN74ACT7803-15DL replace the SN74ALVC7803-20DL in any application?

A: Direct substitution is possible only in systems designed for 4.5V to 5.5V operation. The SN74ACT7803-15DL cannot operate at the 3.0V to 3.6V voltage range of the original part without external voltage regulation.

Q: What are the key differences between these two parts?

A: The primary differences are supply voltage range (3.0V–3.6V vs. 4.5V–5.5V), maximum supply current (40µA vs. 400µA), data rate (50MHz vs. 67MHz), and access time (13ns vs. 12ns). All other functional and package parameters are identical.

Q: Why is the SN74ALVC7803-20DL obsolete?

A: Product obsolescence is determined by the manufacturer. The SN74ACT7803-15DL remains in active production and serves as the current alternative for new designs and ongoing support.

Q: Are both parts in the same package?

A: Yes. Both the SN74ALVC7803-20DL and SN74ACT7803-15DL use the 56-BSSOP package with identical physical dimensions (0.295", 7.50mm width), ensuring mechanical compatibility on PCBs.

Q: Do these parts have the same memory capacity and configuration?

A: Yes. Both parts feature 9K memory (512 x 18 configuration) with synchronous FIFO operation, uni-directional bus architecture, width expansion capability, and programmable flags support.

Q: What compliance certifications apply to both parts?

A: Both the SN74ALVC7803-20DL and SN74ACT7803-15DL are ROHS3 compliant, REACH unaffected, and classified as EAR99 for export control purposes. Both carry MSL 1 (unlimited) moisture sensitivity ratings.