NXP Semiconductors

PCF2128

Real time clock / calendar

© NXP B.V. 2007.

All rights reserved.

For more information, please visit: http://www.nxp.com

For sales office addresses, please send an email to: salesaddresses@nxp.com

Date of release: 4 June 2007

Document identifier: PCF2128_SDS_0

Please be aware that important notices concerning this document and the product(s)

described herein, have been included in section ‘Legal information’.

12. Contents

1

General description . . . . . . . . . . . . . . . . . . . . . . 1

2

Features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1

3

Quick reference data . . . . . . . . . . . . . . . . . . . . . 2

4

Ordering information . . . . . . . . . . . . . . . . . . . . . 2

5

Block diagram . . . . . . . . . . . . . . . . . . . . . . . . . . 3

6

Pinning information . . . . . . . . . . . . . . . . . . . . . . 4

6.1

Pinning . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4

7

Limiting values. . . . . . . . . . . . . . . . . . . . . . . . . . 5

7.1

ESD values . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5

8

Application information. . . . . . . . . . . . . . . . . . . 5

8.1

Application example . . . . . . . . . . . . . . . . . . . . . 6

8.1.1

Timekeeping, power management, CLKOUT,

timestamp and interface active . . . . . . . . . . . . . 6

9

Revision history . . . . . . . . . . . . . . . . . . . . . . . . . 7

10

Legal information. . . . . . . . . . . . . . . . . . . . . . . . 8

10.1

Data sheet status . . . . . . . . . . . . . . . . . . . . . . . 8

10.2

Definitions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8

10.3

Disclaimers . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8

10.4

Trademarks. . . . . . . . . . . . . . . . . . . . . . . . . . . . 8

11

Contact information . . . . . . . . . . . . . . . . . . . . . . 8

12

Contents . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10