SN74ACT2227DWR Equivalent & Substitute Parts

Part Overview

The SN74ACT2227DWR is a Synchronous FIFO (First-In-First-Out) memory circuit manufactured by Texas Instruments, configured as 128 bits (64 x 1 x 2) with a 9ns access time and 60MHz data rate. This component operates within the 4.5V to 5.5V supply voltage range and is housed in a 28-SOIC surface mount package. The product is classified as obsolete, making identification of compatible substitute parts essential for ongoing system support and component procurement.

Substiute Parts

SN74ACT2227DWR

Texas InstrumentsIn Stock: 1178SN74ACT2227DWR Datasheet

Current PartRFQ

SN74ACT2229DWR

Texas InstrumentsIn Stock: 826SN74ACT2229DWR Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the SN74ACT2227DWR is determined by strict adherence to the following electrical and mechanical parameters:

Critical Matching Parameters:

• Manufacturer series (74ACT logic family)
• Package type (28-SOIC surface mount)
• Supply voltage range (4.5V ~ 5.5V)
• Access time (9ns)
• Data rate (60MHz)
• Bus directionality (Uni-Directional)
• Operating temperature range (-40°C ~ 85°C)
• Synchronous FIFO function

The SN74ACT2229DWR qualifies as a direct substitute based on matching all critical electrical and mechanical parameters. While the memory size differs (512 bits versus 128 bits), this represents a functional superset that maintains full compatibility with the original part's electrical interface and timing specifications.

Parameter Comparison

Engineering Selection Recommendations

Both the SN74ACT2227DWR and SN74ACT2229DWR are classified as obsolete products. Selection between these components should be based on system memory requirements and design constraints. The SN74ACT2229DWR provides increased memory capacity (512 bits versus 128 bits) while maintaining identical electrical timing, voltage specifications, and package form factor. Both components are ROHS3 compliant and carry MSL Level 1 ratings, indicating equivalent environmental handling and storage requirements. The identical 28-SOIC package footprint ensures direct PCB compatibility without layout modifications.

Frequently Asked Questions (FAQ)

Q: Can the SN74ACT2229DWR directly replace the SN74ACT2227DWR on existing PCBs?

A: Yes. Both components use the 28-SOIC package with identical pinout compatibility for the 74ACT logic family. The electrical interface, supply voltage range, access time, and data rate specifications are identical, enabling direct substitution without PCB redesign.

Q: What is the primary difference between these two FIFO components?

A: The SN74ACT2229DWR provides four times the memory capacity (512 bits versus 128 bits). All other electrical and mechanical parameters remain identical, including timing, voltage, current, and package specifications.

Q: Are there any compliance or environmental differences between these parts?

A: No. Both components are ROHS3 compliant, carry identical MSL Level 1 ratings, and share the same operating temperature range (-40°C ~ 85°C). Environmental handling and storage requirements are equivalent.

Q: Why are both parts classified as obsolete?

A: Both the SN74ACT2227DWR and SN74ACT2229DWR are legacy 74ACT series logic components. Texas Instruments has discontinued these products in favor of newer logic families. Existing inventory remains available through authorized distributors.

Q: Does the increased memory size of the SN74ACT2229DWR affect system performance?

A: No. The access time (9ns) and data rate (60MHz) specifications are identical. The increased memory capacity does not impact timing or throughput characteristics.