DS3232 Maxim, DS3232 Datasheet - Page 19

• Manufacturer Part Number: DS3232
• Description: The DS3232 is a low-cost temperature-compensated crystal oscillator (TCXO) with a very accurate, temperature-compensated, integrated real-time clock (RTC) and 236 bytes of battery-backed SRAM
• 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 ____________________ 19
© 2010 Maxim Integrated Products
REVISION
NUMBER
0
1
2
3
4
5
is a registered trademark of Maxim Integrated Products, Inc.
REVISION
DATE
11/05
10/07
10/08
9/05
3/06
7/10
Initial release
Changed RoHS note wording for the Ordering Information table
Corrected the Ordering Information part numbers
Changed the reference of Figure 4 to Table 1 in the AC Electrical Characteristics table
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 Characteristics
Added a sentence about limiting exposure to reflow is 2 times maximum to the
Handling, PC Board Layout, and Assembly section
Added the Duty Cycle (Revision A3 Devices) parameter to the Electrical
Characteristics table; added CRATE0 = CRATE1 = 0 conditions to I
Changed the
power is applied and the oscillator is disabled
Added a paragraph to the Pushbutton Reset Function section about how the
operation does not affect the device’s internal operation
Corrected the date register range for 04h from 00–31 to 01–31 in Figure 1
Updated the Typical Operating Circuit
Removed the V
and added verbiage about the pullup to the Pin Description table for
and SCL
In the Electrical Characteristics table, changed the symbols for Timekeeping Battery
Current, Temperature Conversion Current, and Data-Retention Current from I
and I
Added the Delta Time and Frequency vs. Temperature graph in the Typical Operating
Characteristics section
Updated the Block Diagram
Added the V
Offset Register and Temperature Registers (11h–12h) sections
Updated the I
Amended the V
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
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
BATTC
BAT
pin function description in the Pin Description table; changed the 10-hour bit
to I
Extremely Accurate I
BAT
2
BATT
C timing diagrams (Figures 3, 4, and 5)
BAT
PU
Operation section and improved some sections of text for the Aging
pin description to indicate that the pin immediately goes high if
parameter from the Recommended DC Operating Conditions table
, I
capacitor representation in the Typical Operating Circuit; in the
BATTC
Integrated Crystal and SRAM
, and I
BATTDR
DESCRIPTION
, respectively
Maxim is a registered trademark of Maxim Integrated Products, Inc.
BAT
2
/SQW, SDA,
C RTC with
Revision History
BAT
, I
output
TC
,
1–4, 6, 9, 11,
CHANGED
12, 13, 18
PAGES
10, 15
2, 9
17
10
11
17
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