PCF85176T

低复用率的通用LCD驱动器 Universal LCD driver for low multiplex rates

General description

The PCF85176 is a peripheral device which interfaces to almost any Liquid Crystal Display LCD1 with low multiplex rates. It generates the drive signals for any static or multiplexed LCD containing up to four backplanes and up to 40 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

40 segment drives:

  ‹Up to twenty 7-segment alphanumeric characters

  ‹Up to ten 14-segment alphanumeric characters

  ‹Any graphics of up to 160 elements

40×4-bit RAM for display data storage

Auto-incremented display data loading across device subaddress boundaries

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

May be cascaded for large LCD applications up to 2560 elements possible

No external components required

Manufactured insilicon gate CMOS process