DS2502-E64+ Equivalent & Substitute Parts

Part Overview

The DS2502-E64+ is a 1Kbit EPROM non-volatile memory IC utilizing 1-Wire® interface technology, manufactured by Analog Devices Inc./Maxim Integrated. This component is designed for applications requiring single-wire communication with OTP (One-Time Programmable) memory storage. The part maintains Active product status with full RoHS3 compliance and unlimited moisture sensitivity rating (MSL 1). Given the specialized nature of 1-Wire® EPROM technology and limited cross-manufacturer alternatives, substitute identification focuses on direct manufacturer equivalents and pin-compatible variants within the DS2502 product family.

Key Parameters

Parameter	Value
Memory Type	Non-Volatile EPROM
Memory Size	1Kbit
Memory Organization	128 x 8
Memory Interface	1-Wire®
Supply Voltage	2.8V ~ 6V
Operating Temperature	-40°C ~ 85°C (TA)
Mounting Type	Through Hole
Package	TO-92-3 (TO-226AA)
RoHS Status	ROHS3 Compliant
Product Status	Active

Substitute Part Grouping Explanation

Substitution for the DS2502-E64+ is determined by strict equivalence across the following critical parameters:

Memory Interface: 1-Wire® protocol compatibility is mandatory; no alternative serial interfaces are acceptable
Memory Size & Organization: 1Kbit capacity with 128 x 8 organization must be maintained
Package Type: TO-92-3 through-hole configuration ensures mechanical and electrical compatibility
Voltage Range: Supply voltage window of 2.8V ~ 6V must be supported
Operating Temperature: Full -40°C ~ 85°C range must be maintained
RoHS Compliance: ROHS3 compliance status must be equivalent or superior

The DS2502-E64+ represents the direct manufacturer equivalent within the Analog Devices DS2502 family. No alternative part numbers or cross-manufacturer substitutes meet all specified parameters simultaneously.

Parameter Comparison

Parameter	DS2502-E64+ (Main)	DS2502-E64+ (Substitute)
Manufacturer	Analog Devices Inc./Maxim Integrated	Analog Devices Inc./Maxim Integrated
Memory Type	Non-Volatile EPROM	Non-Volatile EPROM
Memory Size	1Kbit	1Kbit
Memory Organization	128 x 8	128 x 8
Memory Interface	1-Wire®	1-Wire®
Supply Voltage	2.8V ~ 6V	2.8V ~ 6V
Operating Temperature	-40°C ~ 85°C	-40°C ~ 85°C
Package	TO-92-3	TO-92-3
RoHS Status	ROHS3 Compliant	ROHS3 Compliant
Product Status	Active	Active

Engineering Selection Recommendations

The DS2502-E64+ is the sole equivalent part meeting all specified electrical and mechanical parameters. Selection is based on:

Active product status ensuring continued manufacturer support and availability
ROHS3 compliance meeting current environmental and regulatory requirements
MSL 1 rating providing unlimited shelf life without moisture sensitivity constraints
Full temperature range operation (-40°C ~ 85°C) supporting industrial and extended-range applications
TO-92-3 package compatibility with existing through-hole PCB designs

No alternative part numbers or manufacturers provide equivalent 1Kbit 1-Wire® EPROM functionality within the specified parameter constraints.

Frequently Asked Questions (FAQ)

Q: Are there cross-manufacturer alternatives to the DS2502-E64+?

A: No. The 1-Wire® interface is proprietary to Analog Devices/Maxim Integrated. No competing manufacturers produce 1Kbit 1-Wire® EPROM devices in TO-92-3 packaging with equivalent electrical specifications.

Q: Can I substitute a different memory size or interface type?

A: No. The 1Kbit capacity and 1-Wire® interface are application-specific requirements. Alternative memory sizes or serial protocols (SPI, I²C) represent different product categories and are not substitutes.

Q: Is the DS2502-E64+ suitable for high-temperature applications?

A: The operating temperature range is -40°C ~ 85°C (TA). Applications requiring extended temperature operation beyond 85°C require evaluation of alternative product lines with higher temperature ratings.

Q: What is the difference between TO-92-3 and other package variants?

A: TO-92-3 is a three-pin through-hole package. This specific package type is required for mechanical compatibility with existing PCB designs. Alternative package types (if available) would require PCB redesign.

Q: Does the DS2502-E64+ meet current compliance requirements?

A: Yes. The part is ROHS3 compliant, REACH unaffected, and classified under ECCN EAR99, meeting current regulatory and export control requirements.

Q: What is the significance of MSL 1 rating?

A: MSL 1 indicates unlimited shelf life with no moisture sensitivity constraints. The component requires no special storage conditions or baking procedures prior to assembly.

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