PCF8523 Real-Time Clock (RTC) and calendar Rev. 7 28 April 2015 Product data sheet 1. General description 1 The PCF8523 is a CMOS Real-Time Clock (RTC) and calendar optimized for low power 2 consumption. Data is transferred serially via the I C-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. For a selection of NXP Real-Time Clocks, see Table 56 on page 68 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 V = 3.0 V and T =25 C DD amb 2 2 2 line bidirectional 1 MHz Fast-mode Plus (Fm+) I C interface, read D1h, write D0h Battery backup input pin and switch-over circuit Freely programmable timer and alarm with interrupt capability Selectable integrated oscillator load capacitors for C =7pF or C = 12.5 pF L L Oscillator stop detection function 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 22. 2 2. Devices with other I C-bus slave addresses can be produced on request.PCF8523 NXP Semiconductors Real-Time Clock (RTC) and calendar 4. Ordering information Table 1. Ordering information Type number Package Name Description Version PCF8523T SO8 plastic small outline package 8 leads SOT96-1 body width 3.9 mm PCF8523TK HVSON8 plastic thermal enhanced very thin small outline SOT909-1 package no leads 8 terminals body 4 4 0.85 mm PCF8523TS TSSOP14 plastic thin shrink small outline package 14 leads SOT402-1 body width 4.4 mm PCF8523U bare die 12 bumps (6-6) PCF8523U 4.1 Ordering options Table 2. Ordering options Product type Sales item (12NC) Orderable part IC Delivery form number number revision PCF8523T/1 935293581118 PCF8523T/1,118 1 tape and reel, 13 inch PCF8523TK/1 935293573118 PCF8523TK/1,118 1 tape and reel, 13 inch PCF8523TS/1 935291196112 PCF8523TS/1,112 1 tube 935291196118 PCF8523TS/1,118 1 tape and reel, 13 inch 1 PCF8523U/12AA/1 935293887005 PCF8523U/12AA/1,00 1 chips with bumps , sawn wafer on Film Frame Carrier (FFC) 1 Bump hardness see Table 53. Table 3. PCF8523U wafer information Type number Wafer thickness Wafer diameter FFC for wafer size Marking of bad die PCF8523U/12AA/1 200 m 6 inch 8 inch wafer mapping 5. Marking Table 4. Marking codes Type number Marking code PCF8523T/1 8523T PCF8523TK/1 8523 PCF8523TS/1 8523TS PCF8523U/12AA/1 PC8523-1 PCF8523 All information provided in this document is subject to legal disclaimers. NXP Semiconductors N.V. 2015. All rights reserved. Product data sheet Rev. 7 28 April 2015 2 of 78
