General description

The PCF85162 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 32 segments. It can be easily cascaded for larger LCD applications.

Features and benefits

Single chip LCD controller and driver

Selectable backplane drive configuration: static, 2, 3, or 4 backplane multiplexing

Selectable display bias configuration: static, 1⁄2, or 1⁄3

Internal LCD bias generationwith voltage-follower buffers

32 segment drives:

Up to sixteen 7-segment numeric characters

Up to eight 14-segment alphanumeric characters

Any graphics of up to 128 elements

32 x 4-bit RAM for display data storage

Display memory bank switching instatic and duplex drive modes

Versatile blinking modes

Independent supplies possible for LCD and logic voltages

Wide power supply range: from 1.8 V to 5.5 V

Wide logic LCD supply range:

From 2.5 V for low-threshold LCDs

Up to 6.5 V for guest-host LCDs and high-threshold twisted nematic LCDs

Low power consumption

400 kHz I2C-bus interface

No external components required

Manufactured insilicon gate CMOS process