1. General description
PCA8551 is an ultra low-power LCD segment driver with 4 backplane- and 36
segment-driver outputs, with either an I
2
C- (PCA8551A) or an SPI-bus (PCA8551B)
interface. It comprises an internal oscillator, bias generation, instruction decoding, and
display controller.
For a selection of NXP LCD segment drivers, see Table 24 on page 47
.
2. Features and benefits
AEC-Q100 grade 2 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
Internal LCD bias generation with buffers
36 segment drives:
Up to 18 7-segment numeric characters
Up to 9 14-segment alphanumeric characters
Any graphics of up to 144 segments/elements
Auto-incrementing display data and instruction loading
Versatile blinking modes
Independent supplies of V
LCD
and V
DD
Power supply ranges:
1.8 V to 5.5 V for V
LCD
1.8 V to 5.5 V for V
DD
Ultra low-power consumption
400 kHz I
2
C-bus interface (PCA8551A)
5 MHz SPI-bus interface (PCA8551B)
Internally generated or externally supplied clock signal
3. Applications
Displays integrated
in a car instrument cluster
in a control indicator
Battery operated applications
Healthcare devices
PCA8551
Automotive 36 × 4 LCD segment driver
Rev. 2 — 24 March 2015 Product data sheet
