OM4085 Philips Semiconductors, OM4085 Datasheet - Page 2

• Manufacturer Part Number: OM4085
• Description: Universal LCD driver for low multiplex rates
• Manufacturer: Philips Semiconductors

Philips Semiconductors
FEATURES
ORDERING INFORMATION
1997 Feb 25
TYPE NUMBER
OM4085T
Single-chip LCD controller/driver
Selectable backplane drive configuration: static
or 2, 3 or 4 backplane multiplexing
Selectable display bias configuration: static,
Internal LCD bias generation with voltage-follower
buffers
24 segment drives: up to twelve 8-segment numeric
characters; up to six 15-segment alphanumeric
characters; or any graphics of up to 96 elements
24
Auto-incremented display data loading across device
subaddress boundaries
Display memory bank switching in static and duplex
drive modes
Versatile blinking modes
LCD and logic supplies may be separated
2.0 to 6 V power supply range
Low power consumption
Power saving mode for extremely low power
consumption in battery-operated and telephone
applications
I
TTL/CMOS compatible
Compatible with any 4-bit, 8-bit or 16-bit
microprocessors/microcontrollers
May be cascaded for large LCD applications
(up to 1536 segments possible)
Cascadable with the 40 segment LCD driver PCF8576C
Optimized pinning for single plane wiring in both single
and multiple OM4085 applications
Space-saving 40 lead plastic very small outline package
(VSO40; SOT158-1)
No external components required (even in multiple
device applications)
Manufactured in silicon gate CMOS process.
Universal LCD driver for low multiplex
rates
2
C-bus interface
4-bit RAM for display data storage
VSO40
NAME
plastic very small outline package; 40 leads
1
2
or
1
3
DESCRIPTION
2
GENERAL DESCRIPTION
The OM4085 is a peripheral device which interfaces to
almost any Liquid Crystal Display (LCD) having low
multiplex rates. It generates the drive signals for any static
or multiplexed LCD containing up to four backplanes and
up to 24 segments and can easily be cascaded for larger
LCD applications. The OM4085 is compatible with most
microprocessors/microcontrollers and communicates via a
two-line bidirectional I
are minimized by a display RAM with auto-incremented
addressing, by hardware subaddressing and by display
memory switching (static and duplex drive modes).
PACKAGE
2
C-bus. Communication overheads
Product specification
OM4085
SOT158-1
VERSION