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NXP Semiconductors Electronic Components Datasheet

PCA21125 Datasheet

SPI-bus Real-Time Clock/calendar

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PCA21125
SPI-bus Real-Time Clock and calendar
Rev. 2 — 25 November 2014
Product data sheet
1. General description
The PCA21125 is a CMOS1 Real-Time Clock (RTC) and calendar optimized for low-power
consumption and an operating temperature up to 125 C. Data is transferred via a Serial
Peripheral Interface (SPI-bus) with a maximum data rate of 6.0 Mbit/s. Alarm and timer
functions are also available with the possibility to generate a wake-up signal on the
interrupt pin.
For a selection of NXP Real-Time Clocks, see Table 46 on page 41
2. Features and benefits
AEC Q100 compliant for automotive applications.
Provides year, month, day, weekday, hours, minutes, and seconds based on
32.768 kHz quartz crystal
Resolution: seconds to years
Clock operating voltage: 1.3 V to 5.5 V
Low supply current: typical 0.8 A at Tamb = 25 C
4-line SPI-bus with separate, but combinable data input and output
Serial interface at VDD = 1.6 V to 5.5 V
1 second or 1 minute interrupt output
Freely programmable timer with interrupt capability
Freely programmable alarm function with interrupt capability
Integrated oscillator capacitor
Internal Power-On Reset (POR)
Open-drain interrupt pin
3. Applications
Automotive time keeping
Metering
1. The definition of the abbreviations and acronyms used in this data sheet can be found in Section 21.


NXP Semiconductors Electronic Components Datasheet

PCA21125 Datasheet

SPI-bus Real-Time Clock/calendar

No Preview Available !

NXP Semiconductors
PCA21125
SPI-bus Real-Time Clock and calendar
4. Ordering information
Table 1. Ordering information
Type number
Package
Name
PCA21125T
TSSOP14
Description
Version
plastic thin shrink small outline
SOT402-1
package; 14 leads; body width 4.4 mm
4.1 Ordering options
Table 2. Ordering options
Product type number Orderable part number Sales item
(12NC)
Delivery form
PCA21125T/Q900/1 PCA21125T/Q900/1,1 935290408118 tape and reel, 13 inch
5. Marking
IC
revision
1
Table 3. Marking codes
Type number
PCA21125T/Q900/1
Marking code
PC21125
PCA21125
Product data sheet
All information provided in this document is subject to legal disclaimers.
Rev. 2 — 25 November 2014
© NXP Semiconductors N.V. 2014. All rights reserved.
2 of 49


Part Number PCA21125
Description SPI-bus Real-Time Clock/calendar
Maker NXP
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PCA21125 Datasheet PDF






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