DS3232SN#T&R【PDF 11/19 页】IC RTC W/TCXO 20-SOIC

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Sheet目录1994

7页 8页 9页 10页 [11页]12页 13页 14页 15页

Extremely Accurate I2C RTC with

Integrated Crystal and SRAM

Revision History

REVISION

NUMBER

REVISION

DATE

DESCRIPTION

PAGES

CHANGED

9/05

Initial release

—

11/05

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

3/06

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 IBAT

Changed the

RST pin description to indicate that the pin immediately goes high if

power is applied and the oscillator is disabled

Added a paragraph to the Pushbutton Reset Function section about how the

RST output

operation does not affect the device’s internal operation

10/07

Corrected the date register range for 04h from 00–31 to 01–31 in Figure 1

Updated the Typical Operating Circuit

Removed the VPU 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 IBAT, ITC,

and IBATTC to IBATT, IBATTC, and IBATTDR, respectively

Added the Delta Time and Frequency vs. Temperature graph in the Typical Operating

Characteristics section

Updated the Block Diagram

Added the VBAT Operation section and improved some sections of text for the Aging

Offset Register and Temperature Registers (11h–12h) sections

10, 15

10/08

Updated the I2C timing diagrams (Figures 3, 4, and 5)

7/10

Amended the VBAT 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 VBAT 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

DS3232

Maxim Integrated 160 Rio Robles, San Jose, CA 95134 USA 1-408-601-1000

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. The parametric values (min and max limits) shown in the Electrical

Characteristics table are guaranteed. Other parametric values quoted in this data sheet are provided for guidance.

2010 Maxim Integrated

The Maxim logo and Maxim Integrated are trademarks of Maxim Integrated Products, Inc.

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