DS3231 Maxim, DS3231 Datasheet - Page 20

• Manufacturer Part Number: DS3231
• Description: The DS3231 is a low-cost, extremely accurate I²C real-time clock (RTC) with an integrated temperature-compensated crystal oscillator (TCXO) and crystal
• 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.
20 ____________________Maxim Integrated Products, 120 San Gabriel Drive, Sunnyvale, CA 94086 408-737-7600
© 2010 Maxim Integrated Products
Extremely Accurate I
RTC/TCXO/Crystal
REVISION
NUMBER
6
7
8
is a registered trademark of Maxim Integrated Products, Inc.
REVISION
DATE
10/08
3/10
7/10
Updated the Typical Operating Circuit.
Removed the V
and added verbiage about the pullup to the Pin Description table for
and SCL.
Added the Delta Time and Frequency vs. Temperature graph in the Typical Operating
Characteristics section.
Updated the Block Diagram.
Added the V
TCXO and Pushbutton Reset Function sections.
Added the register bit POR values to the register tables.
Updated the Aging Offset and Temperature Registers (11h–12h) sections.
Updated the I
Removed the “S” from the top mark in the Ordering Information table and the Pin
Configuration to match the packaging engineering marking specification.
Updated the Typical Operating Circuit; removed the “Top Mark” column from the
Ordering Information; in the Absolute Maximum Ratings section, added the theta-JA
and theta-JC thermal resistances and Note 1, and changed the soldering temperature
to +260°C (lead(Pb)-free) and +240°C (leaded); updated the functional description of
the V
0Ch to “20 Hour” in Bit 5 of Figure 1; updated the BBSQW bit description in the Control
Register (0Eh) section; added the land pattern no. to the Package Information table.
BAT
pin in the Pin Description; changed the timekeeping registers 02h, 09h, and
BAT
2
C timing diagrams (Figures 3, 4, and 5).
PU
Operation section, improved some sections of text for the 32kHz
parameter from the Recommended DC Operating Conditions table
2
C-Integrated
DESCRIPTION
Maxim is a registered trademark of Maxim Integrated Products, Inc.
Revision History (continued)
/SQW, SDA,
9, 11, 12, 13,
1, 2, 3, 4, 6,
CHANGED
13, 14, 15
PAGES
14, 15
16, 17
1, 18
2, 9
10
18
1
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8