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Data Sheet

FULL DATA SHEET (PDF, 48kB) Download   E-Mail

Description

The DS2502-E48 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-E48's EPROM memory contain a globally unique 48-bit node address (MAC-48/EUI-48) 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 (0AH) and the 4-byte UniqueWare project ID 00001129H. The next six bytes contain the EUI-48 node address which consists of an incrementing 24-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 24-bit extension identifier nor the 24-bit company ID are related to the 64-bit ROM registration number. The ROM registration number is used to provide a unique address to access the DS2502-E48 when multidropped on a 1-Wire® bus.

Key Features

Factory programmed 48-bit node address chip (MAC-48/EUI-48) with 768 bits user-programmable OTP-EPROM communicates with the economy of one signal plus ground Provides valid Ethernet address Unique, factory-lasered and tested 64-bit registration number assures absolute traceability because no two parts are alike Built-in multidrop controller ensures compatibility with other 1-Wire products 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

Application Notes

Application Note 27: Understanding and Using Cyclic Redundancy Checks with Maxim iButton Products - DS2502-E48 Application Note 74: Reading and Writing iButtons via Serial Interfaces - DS2502-E48 Application Note 119: Embedding the 1-Wire Master - DS2502-E48 Application Note 120: Communicating through the 1-Wire Master - DS2502-E48 Application Note 126: 1-Wire Communication Through Software - DS2502-E48 Application Note 148: Guidelines for Reliable Long Line 1-Wire® Networks - DS2502-E48 Application Note 178: Printed Circuit Board Identification Using 1-Wire Products - DS2502-E48 Application Note 186: Creating Global Identifiers Using 1-Wire Devices - DS2502-E48 Application Note 192: Using the DS2480B Serial 1-Wire Line Driver - DS2502-E48 Application Note 4205: Using the uIP Stack to Network a MAXQ Microcontroller - DS2502-E48

Evaluation Kits

none

Design Guides

1-Wire® PRODUCTS (PDF)

Reliability Reports

Request Reliability Report for: DS2502-E48

Software/Models

none

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: 1-5 of 5
DS2502-E48	Notes	Free Sample	Buy	Package: TYPE PINS FOOTPRINT   DRAWING CODE/VAR *	Temp	RoHS/Lead-Free? Materials Analysis
DS2502-E48	MAC-48/EUI-48 Ethernet Address			TO92;3 pin; Dwg: 21-0248 (PDF) Use pkgcode/variation: Q3-1*	-40°C to +85°C	RoHS/Lead-Free: No Materials Analysis
DS2502-E48+				TO92;3 pin; Dwg: 21-0248 (PDF) Use pkgcode/variation: Q3+1*	-40°C to +85°C	RoHS/Lead-Free: Lead Free Materials Analysis
DS2502P-E48	MAC-48/EUI-48 Ethernet Address			TSOC;6 pin; Dwg: 21-0382 (PDF) Use pkgcode/variation: D6-1*	-40°C to +85°C	RoHS/Lead-Free: No Materials Analysis
DS2502P-E48+				TSOC;6 pin; Dwg: 21-0382 (PDF) Use pkgcode/variation: D6+1*	-40°C to +85°C	RoHS/Lead-Free: Lead Free Materials Analysis
DS2502P-E48+T&R				TSOC;6 pin; Dwg: 21-0382 (PDF) Use pkgcode/variation: D6+1*	-40°C to +85°C	RoHS/Lead-Free: Lead Free Materials Analysis

Related Products

DS2502 1Kb Add-Only Memory DS2502-E64 IEEE EUI-64 Node Address Chip DS2502-UNW, DS2502P-UNW, DS2502S-UNW, DS2505-UNW, DS2505P-UNW, DS2506-UNW, DS2506S-UNW UniqueWare Add-Only Memory

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