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DS2502R/T&R PDF预览

DS2502R/T&R

更新时间: 2024-11-19 02:57:31
品牌 Logo 应用领域
达拉斯 - DALLAS 存储
页数 文件大小 规格书
22页 744K
描述
1 kbit Add-Only Memory

DS2502R/T&R 数据手册

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10/21/  
DS2502  
1 kbit Add-Only Memory  
www.maxim-ic.com  
PIN ASSIGNMENT  
FEATURES  
ƒ 1024 bits Electrically Programmable Read  
Only Memory (EPROM) communicates with  
the economy of one signal plus ground  
ƒ Unique, factory-lasered and tested 64-bit  
registration number (8-bit family code + 48-  
bit serial number + 8-bit CRC tester) assures  
absolute traceability because no two parts are  
alike  
TO-92  
NC  
NC  
1
2
3
4
8
7
6
5
NC  
NC  
NC  
NC  
DS2502  
DATA  
GND  
8-PIN SO (150 MIL)  
TSOC PACKAGE  
ƒ Built-in multidrop controller ensures  
compatibility with other MicroLAN products  
ƒ EPROM partitioned into four 256-bit pages  
for randomly accessing packetized data  
ƒ Each memory page can be permanently  
write-protected to prevent tampering  
ƒ Device is an “add only” memory where  
additional data can be programmed into  
EPROM without disturbing existing data  
ƒ Architecture allows software to patch data by  
superseding an old page in favor of a newly  
programmed page  
GND  
DATA  
NC  
NC  
NC  
NC  
1
2
3
6
5
4
TOP VIEW  
SOT-23 Package  
Top View  
3
09rr  
1 2 3  
1
2
1 = DATA; 2, 3 = GND  
“rr” = Revision  
BOTTOM VIEW  
ƒ Reduces control, address, data, power, and  
programming signals to a single data pin  
ƒ Directly connects to a single port pin of a  
microprocessor and communicates at up to  
16.3 kbits per second  
Flip Chip, Top View  
with Laser Mark,  
Contacts Not Visible.  
“rrd” = Revision/Date  
1 = DATA  
09rrd  
2 = GND  
1
2
ƒ 8-bit family code specifies DS2502  
communications requirements to reader  
ƒ Presence detector acknowledges when the  
reader first applies voltage  
ƒ Low cost TO-92 or 8-pin SO, SOT-23 (3-  
pin), TSOC and flip chip surface mount  
package  
See 56-G7010-001 for package outline.  
NOTE: The leads of TO-92 packages on tape-  
and-reel are formed to approximately 100 mil  
(2.54 mm) spacing. For details refer to drawing  
56-G0006-003.  
ƒ 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  
1 of 22  
071107  

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