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Data Sheet

FULL DATA SHEET (PDF, 47kB) Download   E-Mail

Description

The DS2502-E64 is a variant of the DS2502 1024-bit add-only memory. It differs from the standard DS2502 in its custom ROM family code 89H, and the UniqueWare™ identifier 5E7 in place of the upper 12 bits of the standard ROM serialization field. Otherwise, the electrical and logical behavior is identical to that of the DS2502. For technical details please refer to the DS2502 data sheet. The first 32 bytes of the DS2502-E64's EPROM memory contain a globally unique 64-bit node address (EUI-64) and are write-protected. The data structure follows the conventions of UniqueWare devices using default data structure (Figure 1 of data sheet). The data record starts with a length byte (0CH) and the 4-byte UniqueWare project ID 00001128H. The next eight bytes contain the EUI-64 global identifier (node address), which consists of an incrementing 40-bit extension identifier and the IEEE®-assigned 24-bit company ID value 006035H. A 16-bit CRC ends the data record. The remaining bytes of the 32-byte memory page remain unprogrammed. Neither the 40-bit extension identifier nor the 24-bit company ID are related to the 64-bit ROM registration number, which is distinct from the IEEE standard 1394-1995 node address. The ROM registration number is used to provide a unique address to access the DS2502-E64 when multidropped on a 1-Wire® bus.

Key Features

IEEE-approved factory programmed 64-bit node address chip (EUI-64) with 768 bits user-programmable OTP-EPROM communicates with the economy of one signal plus ground Meets the node identification requirements of IEEE standard 1394-1995 (FireWire™) Unique, factory-lasered 64-bit registration number assures absolute traceability because no two parts are alike Built-in multidrop controller ensures compatibility with other 1-Wire products Device is an add-only memory where additional data can be programmed into EPROM without disturbing existing data Reduces control, address, data, power, and programming signals to a single pin Directly connects to a single port pin of a microprocessor and communicates at up to 16.3kbps Low cost TO-92 or TSOC surface mount packages Reads over a wide voltage range of 2.8V to 6.0V from -40°C to +85°C; programs at 11.5V to 12.0V from -40°C to +50°C

Diagram

Pin Assignment

Design Guides

1-Wire® Products (PDF)

Reliability Reports

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Software/Models

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Ordering Information

Notes: Other options and links for purchasing parts are listed at: http://www.maxim-ic.com/sales. Didn't Find What You Need? Ask our applications engineers. Expert assistance in finding parts, usually within one business day. Part number suffixes: T or T&R = tape and reel;+ = RoHS/lead-free;# = RoHS/lead-exempt. More: SeeFull Data Sheet or Part Naming Conventions. * Some packages have variations, listed on the drawing. "PkgCode/Variation" tells which variation the product uses. Note that "+", "#", "-" in the part number suffix describes RoHS status. Package drawings may show a different suffix character.

Devices: 1-4 of 4

DS2502-E64	Notes	Free Sample	Buy	Status	Package: TYPE PINS FOOTPRINT   DRAWING CODE/VAR *	Temp	RoHS/Lead-Free? Materials Analysis
DS2502-E64	IEEE EUI-64 Node ID			Active	TO92;3 pin;20 mm² Outline Drawing: 21-0248 (PDF) Land Pattern: Not Applicable Use pkgcode/variation: Q3-1*	-40°C to +85°C	RoHS/Lead-Free: No Materials Analysis
DS2502-E64+				Active	TO92;3 pin;20 mm² Outline Drawing: 21-0248 (PDF) Land Pattern: Not Applicable Use pkgcode/variation: Q3+1*	-40°C to +85°C	RoHS/Lead-Free: Lead Free Materials Analysis
DS2502P-E64	IEEE EUI-64 Node ID			Active	TSOC;6 pin;18 mm² Outline Drawing: 21-0382 (PDF) Land Pattern: 90-0321 (PDF) Use pkgcode/variation: D6-1*	-40°C to +85°C	RoHS/Lead-Free: No Materials Analysis
DS2502P-E64+				Active	TSOC;6 pin;18 mm² Outline Drawing: 21-0382 (PDF) Land Pattern: 90-0321 (PDF) Use pkgcode/variation: D6+1*	-40°C to +85°C	RoHS/Lead-Free: Lead Free Materials Analysis

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