SN74ACT7803-20DL Equivalent & Substitute Parts

Part Overview

The SN74ACT7803-20DL is a Synchronous FIFO (First-In-First-Out) memory circuit manufactured by Texas Instruments, configured as 512 x 18 bits with 9K total memory capacity. This component operates at 50MHz with a 13ns access time and is housed in a 56-SSOP surface mount package. The device is classified as Obsolete, making identification of compatible substitute parts essential for ongoing system support and new design implementations. The SN74ACT7803-15DL serves as a direct manufacturer substitute with improved performance specifications while maintaining electrical and mechanical compatibility.

Substiute Parts

SN74ACT7803-20DL

Texas InstrumentsIn Stock: 1046SN74ACT7803-20DL 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 for the SN74ACT7803-20DL based on the following critical parameters:

Matching Parameters (Substitution Basis):

• Memory configuration: 512 x 18 (9K) — identical
• Function type: Synchronous FIFO — identical
• Supply voltage range: 4.5V ~ 5.5V — identical
• Maximum supply current: 400µA — identical
• Bus directional: Uni-Directional — identical
• Expansion type: Width — identical
• Programmable flags support: Yes — identical
• Operating temperature range: 0°C ~ 70°C — identical
• Package/case: 56-BSSOP (0.295", 7.50mm Width) — identical
• Mounting type: Surface Mount — identical
• RoHS and REACH compliance — identical

Performance Enhancement: The SN74ACT7803-15DL provides improved specifications with 67MHz data rate (versus 50MHz) and 12ns access time (versus 13ns), representing a performance upgrade while maintaining full backward compatibility.

Parameter Comparison

Engineering Selection Recommendations

The SN74ACT7803-15DL is the appropriate substitute for the obsolete SN74ACT7803-20DL. Both components share identical electrical specifications, mechanical packaging, and compliance certifications (ROHS3 Compliant, REACH Unaffected). The substitute part maintains Active product status with Texas Instruments, ensuring continued availability and manufacturing support. The performance improvement in data rate and access time presents no compatibility concerns for existing circuit designs, as the substitute operates within the same voltage and current parameters. Both components are classified as MSL 1 (Unlimited moisture sensitivity), indicating equivalent handling and storage requirements.

Frequently Asked Questions (FAQ)

Q: Can the SN74ACT7803-15DL directly replace the SN74ACT7803-20DL in existing designs?

A: Yes. The substitute part maintains identical memory configuration (512 x 18), supply voltage range (4.5V ~ 5.5V), package type (56-BSSOP), and operating temperature range (0°C ~ 70°C). Pin-for-pin compatibility is assured.

Q: What is the difference between the two part numbers?

A: The primary differences are product status and performance specifications. The SN74ACT7803-20DL is Obsolete with 50MHz data rate and 13ns access time. The SN74ACT7803-15DL is Active with 67MHz data rate and 12ns access time. Both are manufactured by Texas Instruments using identical packaging and electrical interfaces.

Q: Are there any thermal or power consumption differences?

A: No. Both parts specify identical maximum supply current of 400µA and operate within the same 0°C ~ 70°C temperature range. Thermal and power characteristics are equivalent.

Q: Does the substitute part support the same programmable flags functionality?

A: Yes. Both the SN74ACT7803-20DL and SN74ACT7803-15DL support programmable flags. Functional behavior is identical.

Q: What is the packaging difference between the two parts?

A: There is no packaging difference. Both components use 56-BSSOP (0.295", 7.50mm Width) surface mount packages. PCB layout and assembly processes remain unchanged.

Q: Are both parts RoHS compliant?

A: Yes. Both the SN74ACT7803-20DL and SN74ACT7803-15DL are ROHS3 Compliant and REACH Unaffected, meeting current environmental and regulatory requirements.