DS1972 Maxim, DS1972 Datasheet - Page 23

• Manufacturer Part Number: DS1972
• Description: The DS1972 is a 1024-bit, 1-Wire® EEPROM chip organized as four memory pages of 256 bits each in a rugged iButton® package
• Manufacturer: Maxim

Maxim cannot assume responsibility for use of any circuitry other than circuitry entirely embodied in a Maxim product. No circuit patent licenses are
implied. Maxim reserves the right to change the circuitry and specifications without notice at any time.
Maxim Integrated Products, 120 San Gabriel Drive, Sunnyvale, CA 94086 408-737-7600 ____________________ 23
© 2012 Maxim Integrated Products
REVISION
NUMBER
0
1
2
3
4
REVISION
DATE
4/06
8/06
8/09
4/10
1/12
Initial release
UL#913 bullet changed from “Meets UL#93 (4
“Designed to meet UL#93 (4
Deleted UL#913 bullet from the Common iButton Features section.
Changed the RoHS packages to lead(Pb)-free packages in the Ordering Information
table.
Changed V
In the Absolute Maximum Ratings, changed storage temp to -55°C to +125°C; in the
Electrical Characteristics table, changed V
40 years min at 85°C; added note to retention spec: “EEPROM writes can become
nonfunctional after the data-retention time is exceeded. Long-term storage at elevated
temperatures is not recommended; the device can lose its write capability after 10
years at +125°C or 40 years at +85°C.”
In the Electrical Characteristics table, changed the V
removed from the t
Notes 17 and 18; corrected Note 20.
Added to Figure 11 Write-Zero Time Slot.
Added Package Information table.
Created newer template-style data sheet.
Updated Note 1 in the Electrical Characteristics section; specified the data memory
default status and added a note that the memory must be programmed to FFh for the
EPROM mode to function to the Memory Access section.
TLMIN
from 0.46V to 0.5V in the Electrical Characteristics table.
W1LMAX
th
spec; added Note 17 to t
Edit.). . .”
1024-Bit EEPROM iButton
DESCRIPTION
Maxim is a registered trademark of Maxim Integrated Products, Inc.
TH
, V
th
TL
Edit.). . .(Application Pending)” to
based on V
ILMAX
W0L
spec; updated EC table
spec from 0.3V to 0.5V;
PUP
and data retention to
Revision History
CHANGED
PAGES
3, 7, 8
1, 2
2, 3
2, 3
22
All
—
18
1
1
2