IDT71256SA20TP Equivalent & Substitute Parts

Part Overview

The IDT71256SA20TP is a 256Kbit asynchronous SRAM memory IC manufactured by Renesas Electronics Corporation, packaged in a 28-pin DIP configuration with a 20 ns access time. This component is classified as obsolete, making equivalent and substitute parts necessary for system maintenance, repair, and legacy equipment support. The part operates within a 4.5V to 5.5V supply voltage range and supports parallel memory interface architecture typical of industrial and embedded applications from the 1980s-1990s era.

Substiute Parts

IDT71256SA20TP

Renesas Electronics CorporationIn Stock: 1761IDT71256SA20TP Datasheet

Current PartRFQ

71256SA20TPG

Renesas Electronics CorporationIn Stock: 199671256SA20TPG Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution for the IDT71256SA20TP is determined by strict equivalence across the following critical parameters:

• Memory capacity: 256Kbit minimum
• Memory organization: 32K x 8 configuration
• Access time: 20 ns or faster
• Supply voltage range: 4.5V ~ 5.5V compatibility
• Package: 28-DIP through-hole form factor
• Memory interface: Parallel architecture

The substitute part 71256SA20TPG meets all these criteria. It is manufactured by the same supplier (Renesas Electronics Corporation) and maintains identical electrical and mechanical specifications. The primary distinction is packaging format (Tube vs. standard packaging) and RoHS compliance status.

Parameter Comparison

Engineering Selection Recommendations

The 71256SA20TPG is a direct functional equivalent to the IDT71256SA20TP. Both parts share identical memory capacity, access timing, voltage specifications, and physical packaging. The primary consideration for selection is RoHS compliance: the 71256SA20TPG meets ROHS3 standards, while the IDT71256SA20TP does not. For applications subject to RoHS regulatory requirements or environmental compliance mandates, the 71256SA20TPG is the appropriate selection. Both parts are classified as obsolete; availability should be verified through authorized distributors before design commitment.

Frequently Asked Questions (FAQ)

Q: Can the 71256SA20TPG replace the IDT71256SA20TP in existing designs?

A: Yes. The 71256SA20TPG is electrically and mechanically equivalent. Both parts operate at identical voltage levels (4.5V ~ 5.5V), provide 20 ns access time, and use the same 28-DIP through-hole package. Direct substitution is supported without circuit modification.

Q: What is the difference between IDT71256SA20TP and 71256SA20TPG?

A: The parts are functionally identical. The primary differences are packaging format (Tube for the TPG variant) and RoHS compliance status (ROHS3 Compliant for 71256SA20TPG vs. non-compliant for IDT71256SA20TP).

Q: Are there faster alternatives to the 20 ns access time specification?

A: The provided substitute list does not include parts with faster access times. The 71256SA20TPG maintains the 20 ns specification. Faster variants (such as 12 ns or 15 ns versions) exist within the Renesas 71256 series but are listed as separate part numbers and require independent evaluation.

Q: Is the 28-DIP package still available for new designs?

A: Both the IDT71256SA20TP and 71256SA20TPG are classified as obsolete. These parts are suitable for legacy system repair and maintenance only. New designs should evaluate modern memory solutions with current availability and support.

Q: What is the Moisture Sensitivity Level (MSL) for these parts?

A: Both parts carry MSL 1 (Unlimited), indicating no moisture sensitivity restrictions during storage or handling.