SPI-bus Real-Time Clock and calendar

SPI-bus Real-Time Clock and calendar | NXP Semiconductors

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The PCA21125 is a CMOS 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.

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Data Sheet

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Product Details

Block Diagram

PCA21125 Block Diagram

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Features

Key Features

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 μA at T_amb = 25 °C
4-line SPI-bus with separate, but combinable data input and output
Serial interface at V_DD = 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

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Design Resources

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Hardware

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Evaluation and Development Boards
PCA21125 Demo Board
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OM13517UL

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SPI-Bus Real-Time Clock and Calendar

Product Details

Block Diagram

PCA21125 Block Diagram

Features

Key Features

Applications

Automotive

Buy/Parametrics

Documentation

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Application Note (1)

ESD and EMC sensitivity of IC[AN10853]

Brochure (1)

Real-time clocks for automotive applications[75017665]

Data Sheet (1)

SPI-bus Real-Time Clock and calendar[PCA21125]

Package Information (1)

plastic thin shrink small outline package; 14 leads; body width 4.4 mm[SOT402-1]

Packing Information (1)

TSSOP14; Reel pack; SMD, 13"Q1/T1 Standard product orientationOrderable part number ending ,118 or JOrdering code (12NC) ending 118[SOT402-1_118]

Selector Guide (1)

Real Time Clocks Selector Guide Brochure[RTCSelectorGuideA4]

Supporting Information (1)

Footprint for wave soldering[SSOP-TSSOP-VSO-WAVE]

User Guide (1)

User Manual for NXP Real Time Clocks PCF85x3, PCF85x63, PCA8565, PCF2123, and PCA21125[UM10301]

Filter by

Application Note (1)

ESD and EMC sensitivity of IC[AN10853]

Brochure (1)

Real-time clocks for automotive applications[75017665]

Data Sheet (1)

SPI-bus Real-Time Clock and calendar[PCA21125]

Package Information (1)

plastic thin shrink small outline package; 14 leads; body width 4.4 mm[SOT402-1]

Packing Information (1)

TSSOP14; Reel pack; SMD, 13"Q1/T1 Standard product orientationOrderable part number ending ,118 or JOrdering code (12NC) ending 118[SOT402-1_118]

Selector Guide (1)

Real Time Clocks Selector Guide Brochure[RTCSelectorGuideA4]

Supporting Information (1)

Footprint for wave soldering[SSOP-TSSOP-VSO-WAVE]

User Guide (1)

User Manual for NXP Real Time Clocks PCF85x3, PCF85x63, PCA8565, PCF2123, and PCA21125[UM10301]

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Design Files

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