Integrated Crystal and SRAM

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.

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© 2008 Maxim Integrated Products

is a registered trademark of Maxim Integrated Products, Inc.

is a registered trademark of Dallas Semiconductor Corporation.

Marichu Quijano

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

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

3

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

Operating Characteristics section.

7

Updated the Block Diagram.

8

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

10, 15

4

10/08

17