1. general description the pca8547 is a fully featured liquid crystal display (lcd) 1 driver, specifically designed for high-contrast vertical alignment (va) lcd with multiplex rates up to 1:4. it generates the drive signals for any static or multiple xed lcd containing up to four backplanes, 44 segments, and up to 176 elements. the pca8547 features an internal charge pump with internal capacitors for on-chip generation of the lcd driving voltage. to ensure an optimal and stable contrast over the full temperature range, the pca8547 offers a programmable temperature compensation of the lcd supply voltage. the pca8547 can be easily connected to a microcontroller by either the two-line i 2 c-bus (pca8547a) or a three-line bidirectional spi-bus (pca8547b). for a selection of nxp lcd segment drivers, see table 43 on page 67 . 2. features and benefits ? aec q100 compliant for automotive applications. ? low-power single-chip l cd controller and driver ? 176 elements allowing to drive: ? up to 22 7-segment alphanumeric characters ? up to 11 14-segment alphanumeric characters ? selectable backplane drive configuration: static, 2, or 4 backplane multiplexing ? software programmable internal charge pump for on-chip lcd voltage generation up to 9 v with internal capacitors ? 400 khz i 2 c-bus interface (pca8547a) ? 5 mhz spi-bus interface (pca8547b) ? programmable temperature compensation of v lcd with both, negative and positive slopes in four temperature regions ? selectable display bias configuration ? wide range for digital power supply: from 1.8 v to 5.5 v ? wide lcd supply range: from 2.5 v for lo w threshold lcds and up to 9.0 v for high threshold twisted nematic lcds ? on-chip ram for display data storage arranged in two banks ? display memory bank switching ? programmable frame frequency in the range of 60 hz to 300 hz in steps of 10 hz; factory calibrated ? integrated temperature sensor with temperature readout ? on chip calibration of intern al oscillator frequency and v lcd pca8547 4 x 44 automotive lcd driver with integrated charge pump rev. 1 ? 21 january 2014 product data sheet 1. the definition of the abbreviations and acronyms used in this data sheet can be found in section 20 .
pca8547 all information provided in this document is subject to legal disclaimers. ? nxp b.v. 2014. all rights reserved. product data sheet rev. 1 ? 21 january 2014 2 of 78 nxp semiconductors pca8547 4 x 44 automotive lcd driver with integrated charge pump ? manufactured in silicon gate cmos process ? two ram banks provided 3. applications ? instrument cluster ? car radio ? climate control units 4. ordering information 4.1 ordering options 5. marking table 1. ordering information type number package name description version PCA8547AHT tqfp64 plastic thin quad flat package; 64 leads; body 10 ? 10 ? 1.0 mm sot357-1 pca8547bht tqfp64 plastic thin quad flat package; 64 leads; body 10 ? 10 ? 1.0 mm sot357-1 table 2. ordering options product type number sales item (12nc) orderable part number ic revision delivery form PCA8547AHT/a 935303763518 PCA8547AHT/ay 1 tape and reel, 13 inch pca8547bht/a 935303764518 pca8547bht/ay 1 tape and reel, 13 inch table 3. marking codes type number marking code PCA8547AHT PCA8547AHT pca8547bht pca8547bht
pca8547 all information provided in this document is subject to legal disclaimers. ? nxp b.v. 2014. all rights reserved. product data sheet rev. 1 ? 21 january 2014 3 of 78 nxp semiconductors pca8547 4 x 44 automotive lcd driver with integrated charge pump 6. block diagram fig 1. block diagram of pca8547a d d d / & |