DS3232
Extremely Accurate I
2
C RTC with
Integrated Crystal and SRAM
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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 ____________________
19
© 2010 Maxim Integrated Products
Maxim is a registered trademark of Maxim Integrated Products, Inc.
is a registered trademark of Maxim Integrated Products, Inc.
Revision History
REVISION
NUMBER
REVISION
DATE
DESCRIPTION
PAGES
CHANGED
0 9/05
Initial
release
—
1
11/05
Changed RoHS note wording for the
Ordering Information
table 1
Corrected the
Ordering Information
part numbers
1
Changed the reference of Figure 4 to Table 1 in the
AC Electrical Characteristics
table
4
Corrected the supply current units from μA to nA and added BSY = 0 to the Supply
Current vs. Supply Voltage graph in the
Typical Operating Characteristic
s
7
2 3/06
Added a sentence about limiting exposure to reflow is 2 times maximum to the
Handling, PC Board Layout, and Assembly
section
17
Added the Duty Cycle (Revision A3 Devices) parameter to the
Electrical
Characteristics
table; added CRATE0 = CRATE1 = 0 conditions to I
BAT
3
Changed the
RST
pin description to indicate that the pin immediately goes high if
power is applied and the oscillator is disabled
9
Added a paragraph to the
Pushbutton Reset Function
section about how the
RST
output
operation does not affect the device’s internal operation
10
3 10/07
Corrected the date register range for 04h from 00–31 to 01–31 in Figure 1
11
Updated the
Typical Operating Circuit
1
Removed the V
PU
parameter from the
Recommended DC Operating Conditions
table
and added verbiage about the pullup to the
Pin Description
table for
INT
/SQW, SDA,
and SCL
2, 9
In the
Electrical Characteristics
table, changed the symbols for Timekeeping Battery
Current, Temperature Conversion Current, and Data-Retention Current from I
BAT
, I
TC
,
and I
BATTC
to I
BATT
, I
BATTC
, and I
BATTDR
, respectively
3
Added the Delta Time and Frequency vs. Temperature graph in the
Typical Operating
Characteristics
section
7
Updated the
Block Diagram
8
Added the
V
BAT
Operation
section and improved some sections of text for the
Aging
Offset Register
and
Temperature Registers (11h–12h)
sections
10, 15
4 10/08
Updated the I
2
C timing diagrams (Figures 3, 4, and 5)
17
5 7/10
Amended the V
BAT
capacitor representation in the
Typical Operating Circuit
; 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; changed
the V
BAT
pin function description in the
Pin Description
table; changed the 10-hour bit
to 20-hour bit in the
Clock and Calendar
section and Figure 1; updated the BBSQW bit
description in the
Control Register (0Eh)
section; added the land pattern no. to the
Package Information
table
1–4, 6, 9, 11,
12, 13, 18
