1. General description
The PCA85233 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 80 segments and can easily
be cascaded for larger LCD applications. The PCA85233 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-incremental addressing, by
hardware subaddressing, and by display memory switching (static and duplex drive
modes).
For a selection of NXP LCD segment drivers, see Table 28 on page 46
.
2. Features and benefits
AEC-Q100 compliant for automotive applications
Single-chip LCD controller and driver
Selectable backplane drive configuration: static, 2, 3, or 4 backplane multiplexing
Selectable display bias configuration: static,
1
⁄
2
,or
1
⁄
3
Selectable frame frequency: 150 Hz or 220 Hz
Internal LCD bias generation with voltage-follower buffers
80 segment drives:
Up to 40 7-segment alphanumeric characters
Up to 20 14-segment alphanumeric characters
Any graphics of up to 320 segments/elements
80 4 bit RAM for display data storage
Display memory bank switching in static and duplex drive modes
Versatile blinking modes
Independent supplies possible for LCD and logic voltages
Wide power supply range: from 1.8 V to 5.5 V
Wide LCD supply range:
From 2.5 V for low-threshold LCDs
Up to 8.0 V for guest-host LCDs and high-threshold twisted nematic LCDs
Low power consumption
400 kHz I
2
C-bus interface
Extended temperature range up to 105 C
Backside laser marking
May be cascaded for large LCD applications (up to 2560 segments possible)
PCA85233
Automotive 80 × 4 LCD driver for low multiplex rates
Rev. 4 — 6 May 2015 Product data sheet
1. The definition of the abbreviations and acronyms used in this data sheet can be found in Section 20.
