The PCF85134 is a peripheral device which interfaces to almost any Liquid Crystal
Display (LCD) 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 I²C-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
Although there is a small difference in typical frequency frame and ESD test condition PCF85134 can be used as drop-in replacement to PCF8534 without any system circuit or firmware change.