DS2502S/T&R Equivalent & Substitute Parts

Part Overview

The DS2502S/T&R is a 1Kbit EPROM OTP (One-Time Programmable) memory IC manufactured by Analog Devices Inc./Maxim Integrated, featuring a 1-Wire® interface in an 8-SOIC surface mount package. This component is classified as obsolete, which necessitates identification of functionally equivalent alternatives for ongoing design requirements and production continuity. The part operates across a supply voltage range of 2.8V to 6V and supports industrial temperature ranges from -40°C to 85°C.

Substiute Parts

DS2502S/T&R

Analog Devices Inc./Maxim IntegratedIn Stock: 5069DS2502S/T&R Datasheet

Current PartRFQ

DS2502S+T&R

Analog Devices Inc./Maxim IntegratedIn Stock: 3721DS2502S+T&R Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the DS2502S/T&R is determined by strict equivalence across the following critical parameters:

• Memory capacity: 1Kbit (128 x 8 organization)
• Interface protocol: 1-Wire®
• Package type: 8-SOIC form factor
• Supply voltage range: 2.8V to 6V
• Operating temperature range: -40°C to 85°C
• Memory technology: EPROM - OTP (non-volatile)

The DS2502S+T&R meets all substitution criteria as a direct functional equivalent with identical electrical and mechanical specifications.

Parameter Comparison

Engineering Selection Recommendations

The DS2502S+T&R is the direct functional substitute for the obsolete DS2502S/T&R. Both parts share identical electrical specifications, memory capacity, interface protocol, and package geometry, ensuring pin-for-pin and functional compatibility.

The DS2502S+T&R offers the additional advantage of Active product status, ensuring continued availability and manufacturing support. The substitute part also carries ROHS3 compliance, meeting current environmental and regulatory requirements, whereas the original part is RoHS non-compliant. This compliance improvement aligns with modern procurement and manufacturing standards without compromising electrical or mechanical performance.

Frequently Asked Questions (FAQ)

Q: Are DS2502S/T&R and DS2502S+T&R pin-compatible?

A: Yes. Both parts use the 8-SOIC package with identical pinout and electrical characteristics. Direct substitution is supported without circuit modification.

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

A: The primary difference is packaging format. DS2502S/T&R uses standard tape and reel packaging, while DS2502S+T&R uses Cut Tape (CT) and Digi-Reel® packaging. Electrically and functionally, the parts are equivalent.

Q: Why is the original part marked as obsolete?

A: The DS2502S/T&R has reached end-of-life status. The DS2502S+T&R remains in active production and is the recommended alternative for new designs and production continuity.

Q: Does the RoHS3 compliance of the substitute affect compatibility?

A: No. RoHS3 compliance indicates the substitute meets current environmental standards. This is a manufacturing and regulatory advantage with no impact on electrical performance or circuit compatibility.

Q: Can I use DS2502S+T&R in existing designs originally specified for DS2502S/T&R?

A: Yes. The substitute part is functionally and electrically identical. No design changes are required for direct replacement.

Q: What is the 1-Wire® interface?

A: 1-Wire® is a proprietary serial communication protocol that uses a single data line plus ground for bidirectional communication. Both parts implement this interface identically.