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PCF8523TS/1 Datasheet(PDF) 1 Page - NXP Semiconductors |
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PCF8523TS/1 Datasheet(HTML) 1 Page - NXP Semiconductors |
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1 / 75 page  1. General description The PCF8523 is a CMOS1 Real-Time Clock (RTC) and calendar optimized for low power consumption. Data is transferred serially via an I2C-bus with a maximum data rate of 1000 kbit/s. Alarm and timer functions are available with the possibility to generate a wake-up signal on an interrupt pin. An offset register allows fine-tuning of the clock. The PCF8523 has a backup battery switch-over circuit, which detects power failures and automatically switches to the battery supply when a power failure occurs. 2. Features and benefits Provides year, month, day, weekday, hours, minutes, and seconds based on a 32.768 kHz quartz crystal Resolution: seconds to years Clock operating voltage: 1.0 V to 5.5 V Low backup current: typical 150 nA at VDD = 3.0 V and Tamb =25 C 2 line bidirectional 1 MHz Fast-mode Plus (Fm+) I2C interface, read D1h, write D0h2 Battery backup input pin and switch-over circuit Freely programmable timer and alarm with interrupt capability Selectable integrated oscillator load capacitors for CL =7pF or CL = 12.5 pF Internal Power-On Reset (POR) Open-drain interrupt or clock output pins Programmable offset register for frequency adjustment 3. Applications Time keeping application Battery powered devices Metering PCF8523 Real-Time Clock (RTC) and calendar Rev. 4 — 5 July 2012 Product data sheet 1. The definition of the abbreviations and acronyms used in this data sheet can be found in Section 20. 2. Devices with other I2C-bus slave addresses can be produced on request. |
Similar Part No. - PCF8523TS/1 |
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Similar Description - PCF8523TS/1 |
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