PCF85176 datasheet(1/43 Pages) NXP

Part #	PCF85176

Description	Universal LCD driver for low multiplex rates

PDF	43 Pages

Scroll/Zoom	100%

Manufacturer	NXP [NXP Semiconductors]

Direct Link	http://www.nxp.com

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1.

General description

The PCF85176 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 40 segments. It can be easily

cascaded for larger LCD applications. The PCF85176 is compatible with most

microprocessors or microcontrollers and communicates via a 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 modes).

2.

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 generation with 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 in static 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 in silicon gate CMOS process

PCF85176

Universal LCD driver for low multiplex rates

Rev. 01 — 14 April 2010

Product data sheet

1.

The definition of the abbreviations and acronyms used in this data sheet can be found in Section 16.

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