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PCF2127T/2Y Datasheet(PDF) 100 Page - NXP Semiconductors

Part # PCF2127T/2Y
Description  Accurate RTC with integrated quartz crystal for industrial applications
PDF  100 Pages
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Manufacturer  PHILIPS [NXP Semiconductors]
Direct Link  http://www.nxp.com
Logo PHILIPS - NXP Semiconductors

PCF2127T/2Y Datasheet(HTML) 100 Page - NXP Semiconductors

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NXP Semiconductors
PCF2127
Accurate RTC with integrated quartz crystal for industrial applications
© NXP Semiconductors N.V. 2014.
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: 19 December 2014
Document identifier: PCF2127
Please be aware that important notices concerning this document and the product(s)
described herein, have been included in section ‘Legal information’.
8.13.8
Battery low detection interrupts . . . . . . . . . . . 58
8.14
External clock test mode . . . . . . . . . . . . . . . . 59
8.15
STOP bit function . . . . . . . . . . . . . . . . . . . . . . 59
9
Interfaces . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 62
9.1
SPI-bus interface . . . . . . . . . . . . . . . . . . . . . . 62
9.1.1
Data transmission . . . . . . . . . . . . . . . . . . . . . . 63
9.2
I2C-bus interface. . . . . . . . . . . . . . . . . . . . . . . 66
9.2.1
Bit transfer . . . . . . . . . . . . . . . . . . . . . . . . . . . 66
9.2.2
START and STOP conditions . . . . . . . . . . . . . 66
9.2.3
System configuration . . . . . . . . . . . . . . . . . . . 66
9.2.4
Acknowledge . . . . . . . . . . . . . . . . . . . . . . . . . 67
9.2.5
I2C-bus protocol . . . . . . . . . . . . . . . . . . . . . . . 67
9.3
Bus communication and battery backup
operation. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 70
10
Internal circuitry. . . . . . . . . . . . . . . . . . . . . . . . 71
11
Safety notes . . . . . . . . . . . . . . . . . . . . . . . . . . . 71
12
Limiting values. . . . . . . . . . . . . . . . . . . . . . . . . 72
13
Static characteristics . . . . . . . . . . . . . . . . . . . . 73
13.1
Current consumption characteristics, typical . 75
13.2
Frequency characteristics. . . . . . . . . . . . . . . . 78
14
Dynamic characteristics . . . . . . . . . . . . . . . . . 80
14.1
SPI-bus timing characteristics . . . . . . . . . . . . 80
14.2
I2C-bus timing characteristics . . . . . . . . . . . . . 82
15
Application information. . . . . . . . . . . . . . . . . . 84
16
Test information . . . . . . . . . . . . . . . . . . . . . . . . 84
16.1
Quality information . . . . . . . . . . . . . . . . . . . . . 84
17
Package outline . . . . . . . . . . . . . . . . . . . . . . . . 85
18
Packing information . . . . . . . . . . . . . . . . . . . . 87
18.1
Tape and reel information . . . . . . . . . . . . . . . . 87
19
Soldering . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 87
19.1
Footprint information. . . . . . . . . . . . . . . . . . . . 87
20
Appendix . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 89
20.1
Real-Time Clock selection . . . . . . . . . . . . . . . 89
21
Abbreviations . . . . . . . . . . . . . . . . . . . . . . . . . . 91
22
References . . . . . . . . . . . . . . . . . . . . . . . . . . . . 92
23
Revision history . . . . . . . . . . . . . . . . . . . . . . . . 93
24
Legal information. . . . . . . . . . . . . . . . . . . . . . . 94
24.1
Data sheet status . . . . . . . . . . . . . . . . . . . . . . 94
24.2
Definitions . . . . . . . . . . . . . . . . . . . . . . . . . . . . 94
24.3
Disclaimers . . . . . . . . . . . . . . . . . . . . . . . . . . . 94
24.4
Trademarks. . . . . . . . . . . . . . . . . . . . . . . . . . . 95
25
Contact information. . . . . . . . . . . . . . . . . . . . . 95
26
Tables . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 96
27
Figures . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 98
28
Contents . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 99



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