OM4068HSLASH2 datasheet(2/28 Pages) PHILIPS

2 / 28 page

1998 Jun 18

Philips Semiconductors

Product speciﬁcation

LCD driver for low multiplex rates

OM4068

FEATURES

• Single-chip LCD controller/driver

• Static/duplex/triplex drive modes with up to

32/64/96 LCD segments drive capability per device

• Selectable backplane drive configuration: static or

2 or 3 backplane multiplexing

• Selectable display bias configuration drive: static, 1⁄2 or

⁄3

• 32 segment drivers

• Serial data input (word length 32 to 96 bits)

• On-chip generation of intermediate LCD bias voltages

• 2 MHz fast serial bus interface

• CMOS compatible

• Compatible with any 4-bit, 8-bit or 16-bit

microprocessors/microcontrollers

• May be cascaded for large LCD applications

• Logic supply voltage range (VDD − VSS) of 2.5 to 5.5 V

• Display supply voltage range (VLCD − VSS) of

3.5 to 6.5 V

• Low power consumption, suitable for battery operated

systems

• No external components needed by the oscillator

• Manufactured in silicon gate CMOS process.

APPLICATIONS

• Telecom equipment

• Portable instruments

• Alarm systems

• Automotive equipment.

GENERAL DESCRIPTION

The OM4068 is a low-power CMOS LCD driver, designed

to drive Liquid Crystal Displays (LCDs) with low multiplex

rates. It generates the drive signals for any static or

multiplexed LCD containing up to three backplanes and up

to 32 segment lines and can be easily cascaded for larger

LCD applications. All necessary functions for the display

are provided in a single chip, including on-chip generation

of LCD bias voltages, resulting in a minimum of external

components and lower power consumption. A 3-line bus

structure enables serial data transfer with most

microprocessors/microcontrollers. All inputs are CMOS

compatible.

ORDERING INFORMATION

Notes

1. Gull Wing package.

2. For details see Chapter “Bonding pad locations”.

TYPE NUMBER

PACKAGE

NAME

DESCRIPTION

VERSION

OM4068H(1)

QFP44

plastic quad ﬂat package; 44 leads (lead length 1.3 mm);

body 10

× 10 × 1.75 mm

SOT307-2

OM4068P

DIP40

plastic dual in-line package; 40 leads (600 mil)

SOT129-1

OM4068U/5(2)

die

unsawn wafer

−

OM4068U

tray

chip in tray

−

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