PCF8523 – Real-Time Clock (RTC) and calendar

PCF8523 Datasheet PDF learn more.

Part number : PCF8523

Functions : This is a kind of semiconductor, Real-Time Clock (RTC) and calendar.

Pin arrangement :

Package information :

Manufacturer : NXP

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PCF8523 Datasheet PDF

The texts in the PDF file :

PCF8523 Real-Time Clock (RTC) and calendar Rev. 3 — 30 March 2011 Product data sheet 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.


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  Battery backup input pin and switch-over circuit  Freely programmable timer and alarm with interrupt capability  Selectable integrated oscillator load capacitors for CL = 7 pF 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 1. The definition of the abbreviations and acronyms used in this data sheet can be found in Section 19. NXP Semiconductors PCF8523 Real-Time Clock (RTC) and calendar 4. Ordering information Table 1. Ordering information Package Name PCF8523T/1 PCF8523TS/1 PCF8523TK/1 SO8 TSSOP14 HVSON8


plastic small outline package; 8 leads; body width 3.9 mm Version SOT96-1 Type number plastic thin shrink small outline package; 14 leads; SOT402-1 body width 4.4 mm plastic thermal enhanced very thin small outline package; no leads; 8 terminals; body 4  4  0.85 mm SOT909-1 PCF8523U/12AA/1 [1] PCF [ … ]

PCF8523 PDF File

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