2
Extremely Accurate I C-Integrated
RTC/TCXO/Crystal
Revision History (continued)
REVISION REVISION
PAGES
CHANGED
DESCRIPTION
Updated the Typical Operating Circuit.
NUMBER
DATE
1
Removed the V parameter from the Recommended DC Operating Conditions
PU
table and added verbiage about the pullup to the Pin Description table for INT/SQW,
2, 9
DS231
SDA, and SCL.
Added the Delta Time and Frequency vs. Temperature graph in the Typical
Operating Characteristics section.
7
8
6
10/08
Updated the Block Diagram.
Added the V
TCXO and Pushbutton Reset Function sections.
Operation section, improved some sections of text for the 32kHz
BAT
10
Added the register bit POR values to the register tables.
Updated the Aging Offset and Temperature Registers (11h–12h) sections.
13, 14, 15
14, 15
2
Updated the I C timing diagrams (Figures 3, 4, and 5).
16, 17
Removed the “S” from the top mark in the Ordering Information table and the Pin
Configuration to match the packaging engineering marking specification.
7
3/10
1, 18
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implied. Maxim reserves the right to change the circuitry and specifications without notice at any time.
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