1. general description the pcf85134 is a peripheral device which interfaces to almost any liquid crystal display (lcd) 1 with low multiplex rates. it generates the drive signals for any static or multiplexed lcd containing up to four backplanes and up to 60 segments. it can be easily cascaded for larger lcd applications. the pcf85134 is compatible with most microcontrollers and communicates via the two-line bidirectional i 2 c-bus. communication overheads are minimized by a display ram with auto-incremented addressing, by hardware subaddressing, and by display memory switching (static and duplex drive modes). for a selection of nxp lcd segment drivers, see table 26 on page 45 . 2. features and benefits ? single-chip lcd controller and driver ? selectable backplane drive configurations : static, 2, 3, or 4 backplane multiplexing ? 60 segment outputs allowing to drive: ? 30 7-segment alphanumeric characters ? 15 14-segment alphanumeric characters ? any graphics of up to 240 elements ? cascading supported for larger applications ? 60 ? 4-bit display data storage ram ? wide lcd supply range: from 2.5 v for low threshold lcds up to 6.5 v for high threshold twisted nematic lcds ? internal lcd bias generation with voltage follower buffers ? selectable display bias configurations: static, 1 2 , or 1 3 ? wide logic power supply range: from 1.8 v to 5.5 v ? lcd and logic supplies may be separated ? low power consumption ? 400 khz i 2 c-bus interface ? no external components required ? display memory bank switching in static and duplex drive mode ? versatile blinking modes ? silicon gate cmos process pcf85134 universal 60 x 4 lcd segment driv er for multiple x rates up to 1:4 rev. 3 ? 12 may 2014 product data sheet 1. the definition of the abbreviations and acronyms used in this data sheet can be found in section 20 .
pcf85134 all information provided in this document is subject to legal disclaimers. ? nxp semiconductors n.v. 2014. all rights re served. product data sheet rev. 3 ? 12 may 2014 2 of 53 nxp semiconductors pcf85134 universal 60 x 4 lcd segment driver for low multiplex rates 3. ordering information 3.1 ordering options 4. marking table 1. ordering information type number package name description version PCF85134HL lqfp80 plastic low profile quad flat package; 80 leads; body 12 ? 12 ? 1.4 mm sot315-1 table 2. ordering options product type number orderable part number sales item (12nc) delivery form ic revision PCF85134HL/1 PCF85134HL/1,118 935290742118 tape and reel, 13 inch 1 table 3. marking codes type number marking code PCF85134HL/1 PCF85134HL
pcf85134 all information provided in this document is subject to legal disclaimers. ? nxp semiconductors n.v. 2014. all rights re served. product data sheet rev. 3 ? 12 may 2014 3 of 53 nxp semiconductors pcf85134 universal 60 x 4 lcd segment driver for low multiplex rates 5. block diagram fig 1. block diagram of pcf85134 d d d / & |