Integrated Crystal and SRAM

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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 Characteristics

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

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

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

3

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

Characteristics section

7

Updated the Block Diagram

8

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

10, 15

4

10/08

17

5

7/10

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

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