Datasheet

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
microcontrollers and communicates via the two-line bidirectional I
2
C-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
 AEC-Q100 compliant for automotive applications
 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
 15 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 high
threshold twisted nematic LCDs
 Internal LCD bias generation with voltage follower buffers
 Selectable display bias configurations: static,
1
⁄
2
, or
1
⁄
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 I
2
C-bus interface
 No external components required
 Display memory bank switching in static and duplex drive modes
 Versatile blinking modes
 Silicon gate CMOS process
PCA8534A
Automotive LCD driver for low multiplex rates
Rev. 3 — 25 July 2011 Product data sheet
1. The definition of the abbreviations and acronyms used in this data sheet can be found in Section 18.