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).
For a selection of NXP LCD segment drivers, see Table 26 on page 45
.
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. 4 — 16 April 2015 Product data sheet
1. The definition of the abbreviations and acronyms used in this data sheet can be found in Section 20.
