PCA8534A Datasheet, PDF (1/44 Pages) NXP Semiconductors – Universal LCD driver for low multiplex rates

PCA8534A
Universal LCD driver for low multiplex rates
Rev. 02 — 1 June 2010
Product data sheet
1. General description
The PCA8534A 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 60 segments. It can be easily
cascaded for larger LCD applications. The PCA8534A 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).
AEC-Q100 compliant for automotive applications.
2. Features and benefits
„ Single-chip LCD controller and driver
„ Selectable backplane drive configurations: static, 2, 3, or 4 backplane multiplexing
„ 60 segment outputs allowing to drive:
‹ 30 7-segment alphanumeric characters
‹ 16 14-segment alphanumeric characters
‹ Any graphics of up to 240 elements
„ Cascading supported for larger applications
„ 60 × 4-bit display data storage RAM
„ Wide LCD supply range: from 2.5 V for low threshold LCDs up to 6.5 V for guest-host
LCDs and high threshold (automobile) twisted nematic LCDs
„ Internal LCD bias generation with voltage follower buffers
„ Selectable display bias configurations: static, ¹â„₂, or ¹â„₃
„ Wide logic power supply range: from 1.8 V to 5.5 V
„ LCD and logic supplies may be separated
„ Low power consumption
„ 400 kHz I²C-bus interface
„ Compatible with any microprocessors or microcontrollers
„ No external components
„ Display memory bank switching in static and duplex drive modes
„ Auto-incremented display data loading
„ Versatile blinking modes
„ Silicon gate CMOS process
1. The definition of the abbreviations and acronyms used in this data sheet can be found in Section 16.