Extremely Accurate SPI Bus 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.

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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

2/06

Initial release.

—

RST description of the

Pin Description.

8

1

7/07

Corrected the POR for the BB32kHz bit from 0 to 1.

15

Updated the Typical Operating Circuit.

1

table and added verbiage about the pullup to the Pin Description table for

INT/SQW.

2, 8

In the Electrical Characteristics table, added CRATE1 = CRATE0 = 0 to the

3

(max) to 400ns (min).

4

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

Operating Characteristics section.

7

Updated the Block Diagram.

9

Pushbutton Reset Function, Aging Offset Register (10h/90h), and Temperature

Registers (11h–12h) sections.

10, 16

2

10/08

Corrected the description of when the countdown chain is reset in the Clock

and Calendar section.

11