PCF1179C 4-digit duplex LCD car clock Rev. 3 12 February 2015 Product data sheet 1. General description The PCF1179C is a single chip, 4.19 MHz car clock circuit providing hours, minutes, and seconds functions. It is designed to drive a 4-digit duplex liquid crystal display (LCD). Two external single-pole, single-throw push buttons accomplish all time setting functions. Time calibration and voltage regulator are electrically programmable via an on-chip EEPROM. The circuit is battery-operated via an internal voltage regulator and an external resistor. 2. Features and benefits Internal voltage regulator is electrically programmable for various LCD voltages Time calibration is electrically programmable (no trimming capacitor required) LCD voltage adjusts with temperature for a good contrast 4.19 MHz oscillator 12-hour or 24-hour mode Operating ambient temperature: 40 Cto+85 C 28-lead plastic SMD (SO28) 4 Hz set mode. 3. Ordering information Table 1. Ordering information Type number Package Name Description Version PCF1179CT SO28 plastic small outline package 28 leads SOT136-1 body width 7.5 mm 3.1 Ordering options Table 2. Ordering options Product type number Orderable part number Sales item Delivery form IC (12NC) revision PCF1179CT PCF1179CT,112 935059760112 Tube 1 PCF1179CT PCF1179CT,118 935059760118 Reel Pack, SMD, 13 inch 1PCF1179C NXP Semiconductors 4-digit duplex LCD car clock 4. Marking Table 3. Marking codes Type number Marking code PCF1179CT PCF1179CT 5. Block diagram %3 VHJPHQW (&2 (5 GULYHUV %3 (&2 (5 & 3&) 0 30 +2856 0,187(6 6(&21 6 &2817(5 &2817(5 &2817(5 &2817(5 26&B,1 2 5 7 26&,// %/( ,9, (5 -867 26&B287 6(/ ((3520 9 7 )/ 6+ 6 &21752/ 6 76 /2*,& 02 ( (1 %/( ( * 7 92/ 9 9 5 2 7 5(*8/ DDD Fig 1. Block diagram of PCF1179C PCF1179C All information provided in this document is subject to legal disclaimers. NXP Semiconductors N.V. 2015. All rights reserved. Product data sheet Rev. 3 12 February 2015 2 of 25 66 33