1. general description the pcf8564a is a cmos 1 real-time clock and calendar optimized for low power consumption. a programmable clock output, interrupt output and voltage low detector are also provided. all addresses and data are transferred serially via the two-line bidirectional i 2 c-bus. maximum bus speed is 400 kbit/s. the built-in word address register is incremented automatically after each written or read data byte. 2. features and benefits ? provides year, month, day, weekday, hours, minutes, and seconds based on a 32.768 khz quartz crystal ? wide clock operating voltage: 1.0 v to 5.5 v ? low back-up current typical 250 na at 3.0 v and 25 ? c ? 400 khz two-wire i 2 c interface (1.8 v to 5.5 v) ? low-voltage detector ? alarm and timer functions ? two integrated os cillator capacitors ? programmable clock output for peripheral devices (32.768 khz, 1.024 khz, 32 hz, and 1hz) ? internal power-on reset (por) ? i 2 c slave address: read a3h, write a2h 3. applications ? timing devices ? time of the day tracking ? process timing ? alarm ? portable instruments ? electronic metering ? battery powered products pcf8564a real time clock and calendar rev. 3 ? 26 august 2013 product data sheet 1. the definition of the abbreviations and acronyms used in this data sheet can be found in section 20 .
pcf8564a all information provided in this document is subject to legal disclaimers. ? nxp b.v. 2013. all rights reserved. product data sheet rev. 3 ? 26 august 2013 2 of 48 nxp semiconductors pcf8564a real time clock and calendar 4. ordering information 4.1 ordering options [1] bump hardness, see table 36 . 5. marking table 1. ordering information type number package name description version pcf8564au bare die wire bond die; 9 bonding pads pcf8564au pcf8564aug bare die 9 bumps pcf8564aug table 2. ordering options product type number sales item (12nc) orderable part number ic revision delivery form pcf8564au/10ab/1 935289478005 pcf8564a u/10ab/1,0 1 wafer, sawn, on ffc pcf8564au/5bb/1 935289319015 pcf8564au/5bb/1,01 1 unsawn wafer pcf8564au/5gb/1 935289477015 pcf856 4au/5gb/1,01 1 unsawn wafer pcf8564au/5gc/1 935293569015 pcf856 4au/5gc/1,01 1 unsawn wafer pcf8564aug/12hb/1 935301011005 pcf8564aug/1 2hb/1v 1 wafer, sawn, on 8 inch metal ffc; chips with soft bumps [1] table 3. marking codes type number marking code pcf8564au pc8564a-1 pcf8564aug pc8564a-1
pcf8564a all information provided in this document is subject to legal disclaimers. ? nxp b.v. 2013. all rights reserved. product data sheet rev. 3 ? 26 august 2013 3 of 48 nxp semiconductors pcf8564a real time clock and calendar 6. block diagram fig 1. block diagram of pcf8564a d d k 3 & |