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Analog Devices Inc./Maxim Integrated DS2502P-E64+
- Part No.:
- DS2502P-E64+
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Memory
- Package:
- 6-SMD, J-Lead
- Datasheet:
-
DS2502P-E64+.pdf
- Description:
- IC EPROM 1KBIT 1-WIRE 6TSOC
- Quantity:
- Payment:
- Shipping:
Inventory:2,886
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Product details
Overview
DS2502P-E64+ from Maxim Integrated is a 1-Wire add-only memory IC with factory-programmed IEEE EUI-64 node address (89h family code), 768-bit user-programmable OTP-EPROM, single-contact interface, -40°C to +85°C operating range, and TSOC-6 package. It serves as a traceable node identifier in FireWire-compliant systems and embedded device authentication circuits.
For engineers reviewing the DS2502P-E64+ datasheet, DS2502P-E64+ pinout, DS2502P-E64+ application, or DS2502P-E64+ equivalent, key selection criteria include its EUI-64 compliance, 1-Wire multidrop compatibility, 11.5–12.0V programming voltage requirement, OTP write-once behavior, and TSOC-6 pin mapping for space-constrained PCB layouts.
Technical Context
The DS2502P-E64+ implements a 1-Wire bus protocol with presence detection, CRC16 validation (inverted polynomial X¹⁶+X¹⁵+X²+1), and factory-lasered 64-bit ROM registration number. Its memory architecture separates write-protected EUI-64 data (addresses 00h–1Fh) from user-programmable OTP-EPROM (20h–7Fh).
It uses a single bidirectional DATA line with ground reference, supports up to 16.3 kbps communication, and requires 11.5–12.0 V for EPROM programming - only valid within -40°C to +50°C ambient. The TSOC-6 package integrates internal pull-up and timing control for direct microcontroller port-pin interfacing.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| EUI-64 Address | Factory-programmed, IEEE-compliant 64-bit node ID (006035h company ID + 40-bit extension); enables FireWire 1394-1995 node identification |
| Memory Type | 768-bit OTP-EPROM (addresses 20h–7Fh); supports "add-only" writes without erasing existing data |
| Interface | Single-contact 1-Wire bus; reduces MCU I/O count and eliminates separate clock/address/control lines |
| Operating Voltage | 2.8V–6.0V read range; ensures interoperability across diverse low-voltage embedded power rails |
| Programming Voltage | 11.5V–12.0V required; mandates external high-voltage charge pump circuitry during field programming |
| Temperature Range | -40°C to +85°C operation; validated for industrial-grade environmental robustness |
| CRC Validation | Inverted CRC16 over UDP packet (X¹⁶+X¹⁵+X²+1); enables automatic integrity checking in 1-Wire API stacks |
Pinout & Package
DS2502P-E64+ is housed in a 6-pin TSOC surface-mount package (3.0mm × 2.4mm × 1.0mm). Pin 1 is marked by a dot on the top surface.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | DATA | Bidirectional 1-Wire data line; carries presence pulse, commands, data, and timing via parasitic power or external supply |
| 2 | NC | No connect; internally unconnected; must be left floating or tied to GND per layout guidelines |
| 3 | NC | No connect; internally unconnected; no routing or termination required |
| 4 | NC | No connect; internally unconnected; avoids signal coupling in dense layouts |
| 5 | NC | No connect; internally unconnected; maintains package symmetry and thermal uniformity |
| 6 | GND | Ground reference for DATA line and internal logic; mandatory return path for parasitic power charging |
Key Features
| Feature | Design Value |
|---|---|
| Factory-Lasered EUI-64 | Guarantees globally unique node identity per unit; eliminates manual MAC assignment and collision risk in distributed networks |
| 1-Wire Multidrop Controller | Enables daisy-chaining of multiple DS2502P-E64+ units on one bus wire; simplifies wiring in sensor clusters or asset tags |
| Add-Only Memory Architecture | Allows incremental firmware version stamps or calibration logs without overwriting prior records - critical for audit trails |
| UDP Data Structure Compliance | Supports plug-and-play integration with standard 1-Wire APIs (e.g., iButton SDK); eliminates custom driver development |
| Wide Read Voltage Range | Operates from 2.8V to 6.0V; compatible with Li-ion, 3.3V, and 5V system rails without level-shifting |
Applications
| Asset Tracking Tag | Industrial Sensor Node ID |
|---|---|
Use Scenario: Tamper-evident RFID-equivalent tag attached to tools, containers, or medical devices for lifecycle logging. IC Role / Device Role / Timing Role: DS2502P-E64+ provides cryptographically verifiable, factory-assigned EUI-64 identity used by host readers to authenticate physical assets. Use Value: Eliminates duplicate IDs in large fleets; enables automated inventory reconciliation using standardized 1-Wire readers. | Use Scenario: Embedded in temperature/humidity sensors deployed across factory floors with shared 1-Wire bus infrastructure. IC Role / Device Role / Timing Role: DS2502P-E64+ acts as immutable node address chip, allowing master controller to uniquely address each sensor without configuration overhead. Use Value: Reduces firmware complexity by removing need for manual node enumeration or address jumpers. |
| FireWire Device Authentication | Calibration Certificate Storage |
Use Scenario: Integrated into IEEE 1394-1995 peripheral enclosures (e.g., digital camcorders, storage docks) to meet node ID requirements. IC Role / Device Role / Timing Role: DS2502P-E64+ supplies the mandatory 64-bit registration number referenced during FireWire link-layer initialization. Use Value: Ensures compliance with FireWire specification without custom ASIC design or software-based ID generation. | Use Scenario: Mounted on precision test equipment (e.g., multimeters, oscilloscopes) to store factory calibration constants and traceability metadata. IC Role / Device Role / Timing Role: DS2502P-E64+ stores write-once calibration coefficients and NIST-traceable timestamps in OTP-EPROM (20h–7Fh). Use Value: Prevents accidental or malicious modification of calibration data while enabling field-read access via standard 1-Wire commands. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar 1-Wire node identification applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| DS2502-E64+ | TO-92 package; 3-pin; same EUI-64 structure and OTP memory map but different mechanical form factor | Suitable for through-hole prototyping or legacy board designs requiring axial leaded components | Select DS2502-E64+ when manual assembly, socketing, or thermal mass requirements favor TO-92 |
| DS2401+ | 64-bit ROM only (no EPROM); no user-programmable memory; smaller die size; identical 1-Wire protocol and pinout (TSOC-6) | Limited to static node ID use cases; cannot store calibration logs, firmware stamps, or project-specific metadata | Choose DS2401+ where cost sensitivity outweighs need for field-programmable data storage |
Compared with DS2502-E64+ and DS2401+, the DS2502P-E64+ uniquely combines TSOC-6 surface-mount compatibility, factory EUI-64 compliance, and 768-bit OTP-EPROM - making it optimal for production-ready, space-constrained, and audit-trail-capable designs.
Availability
DS2502P-E64+ is available at Aetrix Electronics and suitable for industrial sensor node identification, FireWire peripheral authentication, and calibration certificate storage requiring stable component supply and long-term obsolescence management.
Supply support for DS2502P-E64+ includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.
Manufacturer
Maxim Integrated (now part of Analog Devices) designs precision analog, mixed-signal, and digital ICs for industrial, automotive, and communications applications.
The DS2502P-E64+ belongs to Maxim's 1-Wire add-only memory product line, engineered specifically for secure, low-pin-count node identification and tamper-resistant data storage in distributed embedded systems.
FAQ
What is the function of the NC pins on the DS2502P-E64+?
The DS2502P-E64+ has four NC (no-connect) pins (pins 2–5) in its TSOC-6 package. These pins are internally unconnected and serve mechanical and thermal roles - maintaining package symmetry, aiding reflow soldering uniformity, and preventing unintended coupling. They must remain unconnected in the PCB layout; tying them to GND or other nets may cause reliability issues or violate Maxim's recommended practices for the DS2502P-E64+.
Does the DS2502P-E64+ support standard 1-Wire communication without external components?
Yes, the DS2502P-E64+ supports standard 1-Wire communication using only a single DATA line and GND. It includes an internal multidrop controller and presence-detection circuitry. However, a 4.7kΩ pull-up resistor to VCC (2.8–6.0V) is required externally, and parasitic power mode demands precise timing - so full compliance requires adherence to Maxim's 1-Wire timing specifications in the DS2502P-E64+ datasheet.
Can the factory-programmed EUI-64 address in the DS2502P-E64+ be modified?
No, the EUI-64 address in the DS2502P-E64+ is laser-programmed during wafer sort and permanently stored in write-protected memory (addresses 00h–1Fh). It cannot be altered, erased, or rewritten after manufacture. This immutability ensures absolute traceability and compliance with IEEE 1394-1995 requirements - a core design feature of the DS2502P-E64+.
What is the purpose of the inverted CRC16 in the DS2502P-E64+ data structure?
The inverted CRC16 in the DS2502P-E64+ validates the integrity of the EUI-64 node address and UniqueWare Project ID using polynomial X¹⁶+X¹⁵+X²+1. Its inversion allows direct comparison against standard 1-Wire API outputs (e.g., iButton SDK), eliminating post-read bit-flipping. This CRC verification is mandatory before accepting the EUI-64 value - ensuring reliable node identification in the DS2502P-E64+.
Is the DS2502P-E64+ RoHS-compliant and lead-free?
Yes, the DS2502P-E64+ is RoHS-compliant and lead-free, as indicated by the "+" suffix in its part number. Maxim specifies this variant meets EU RoHS Directive 2011/65/EU requirements, including maximum concentration limits for lead, mercury, cadmium, hexavalent chromium, PBB, and PBDE. Full compliance documentation, including material declarations, is available under the DS2502P-E64+ product page on Analog Devices' official site.
DS2502P-E64+ Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- 6-SMD, J-Lead
- Packaging:
- Tube
- Product Status:
- Active
- Programmable:
- Not Verified
- Memory Type:
- Non-Volatile
- Memory Format:
- EPROM
- Technology:
- EPROM - OTP
- Memory Size:
- 1Kbit
- Memory Organization:
- 128 x 8
- Memory Interface:
- 1-Wire®
- Clock Frequency:
- -
- Write Cycle Time - Word, Page:
- -
- Access Time:
- -
- Voltage - Supply:
- 2.8V ~ 6V
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 6-TSOC
DS2502P-E64+ FAQ
1.How can I place an order for DS2502P-E64+ through Aetrix?
Please submit a Request for Quotation (RFQ) for DS2502P-E64+ on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.
2.Are the price and stock information for DS2502P-E64+ reliable?
The price and inventory of DS2502P-E64+ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for DS2502P-E64+ is usually 5 days.
3.What payment methods are accepted for DS2502P-E64+?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for DS2502P-E64+ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for DS2502P-E64+?
DS2502P-E64+ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your DS2502P-E64+ order is processed, you will receive an email with the shipment details and tracking number.
Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.
5.How can I obtain technical support or documentation for DS2502P-E64+?
For technical support, including DS2502P-E64+ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your DS2502P-E64+ requirements.
6.How does Aetrix verify that DS2502P-E64+ is sourced from the original manufacturer or authorized distributors?
All DS2502P-E64+ products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that DS2502P-E64+ meets industry standards.
7.What is the process for return or replacement of DS2502P-E64+?
All DS2502P-E64+ units undergo pre-shipment inspection (PSI). If there is an issue with DS2502P-E64+, returns or replacements are accepted under the following conditions:
1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.
2.The issue is reported within 90 days of delivery.
3.The DS2502P-E64+ part is unused and in its original packaging.
Return procedure for DS2502P-E64+:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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