DS2501-UNW DALLAS | Alldatasheet
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DALLAS DS2501—UNW/DS2502-UNW SEMICONDUCTOR UniqueWare™ Add Only Memory SPECIAL FEATURES mteSs4 © 512 bits (DS2501-UNW) or 1024 bits (DS2502-UNW) oq}1 sho Electrically Programmable Read Only Memory oo|2 7 ho (EPROM) communicates with the economy of one sig- od|; «fo nal plus ground cd], sho © Unique, factory-lasered and tested 64-bit registration apm SoIC number (8-bit family code, 36-bit serialization, 12-bit (50 MIL) UniqueWare Identifier 5E7H, 8-bit CRC-tester) See Mech. Drawings assures absolute traceability because no two parts are alike. Family code 91H for the DS2501-UNW, 89H for the DS2502-UNW © Built-in multidrop controller ensures compatibility with other MicroLAN™ products TSOC PACKAGE ® EPROM partitioned into two (DS2501—UNW) or four 123 (654) (DS2502-UNW) 256-bit pages forrandomly accessing packetized data records Qa * Each memory page can be permanently write-pro- TOP VIEW tected to prevent tampering BOTTOM VIEW 3.7X4.0X1.5mm * Device is an “add only" memory where additional data See Mech, Drawings See Mech, Drawings can be programmed into EPROM without disturbing existing data PIN ASSIGNMENT * Reduces control, address, data, power and program- To-92 Tsoc soc ming signals to a single pin Pin 1 Ground Ground NC © Directly connects to a single port pin of a microproces- Bn 3 Rae Rae he > : in ata sor and communicates at up fo 16.3 bits per second F'n $ Ne 2a . Presence ,; fait acknowledges when reader first pins 5 to 8 NC NC applies voltage : ORDERING INFORMATION * Low cost TO-92 or 8-pin SOIC and TSOC surface Hg9501-UNW TO-92 package mount packages DS2501S-UNW 8 pin SOIC package © Reads over a wide voltage range of 2.8V to 6.0V from DS2501P-UNW 6-pin TSOC package 40°C to +85°C; programs at 11.5V to 12.0V from DS2502-UNW TO-92 package 40°C to + 50°C DS2502S-UNW 8-pin SOIC package DS2502P-UNW 6-pin TSOC package SILICON LABEL DESCRIPTION The DS2501-UNW and DS2502-UNWare factory pro- _that of the DS2502. For technical details please refer to grammed versions of the DS2502 1K-bit Add-Only _the DS2502 data sheet. Memory. They differ from the standard DS2502 in their ; custom ROM family code 91H (DS2501-UNW) and The DS2501-UNW and DS2502-UNW are only avail 89H (DS2502-UNW) respectively, andthe UniqueWare _@/@ preprogrammedwith customer specific and write— Identifier 5E7 in place of the upper 12 bits of the stan- Protected UniqueWare data. Memory pages not used dard serialization field. With the DS2501-UNW, the for UnlaueWare datacan be programmedin he applica : tion. For more detalls on UniqueWare, please refer to upper two memo 1s are not accessible; the always Nong FEM ond cannot be programmed ‘Othe, the UniqueWare Project Setup Manual, available as wise, the electrical and logical behavior is identical to Application Note 99 from Dallas Semiconductor. 21988 1/1