Datasheet

1. General description
The PCA9620 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 eight backplanes, 60 segments, and up to 480 elements. The
PCA9620 is compatible with most microprocessors or microcontrollers and communicates
via a two-line bidirectional I
2
C-bus. Communication overheads are minimized using a
display RAM with auto-incremented addressing and display memory switching. The
PCA9620 features an internal charge pump with internal capacitors for on-chip generation
of the LCD driving voltages
2. Features and benefits
 AEC Q100 grade 2 compliant for automotive applications
 Low power consumption
 Extended operating temperature range from 40 C to +105 C
 60 segments and 8 backplanes allowing to drive:
 up to 60 7-segment alphanumeric characters
 up to 30 14-segment alphanumeric characters
 any graphics of up to 480 elements
 480-bit RAM for display data storage
 Selectable backplane drive configuration: static, 2, 4, 6, or 8 backplane multiplexing
 Programmable internal charge pump for on-chip LCD voltage generation up to
3  V
DD2
 400 kHz I
2
C-bus interface
 Selectable linear temperature compensation of V
LCD
 Selectable display bias configuration
 Wide range for digital and analog power supply: from 2.5 V to 5.5 V
 Wide LCD supply range: from 2.5 V for low threshold LCDs and up to 9.0 V for high
threshold (automobile) twisted nematic LCDs
 Display memory bank switching in static, duplex, and quadruplex drive modes
 Programmable frame frequency in steps of 10 Hz in the range of 60 Hz to 300 Hz;
factory calibrated with a tolerance of 15 % covering the whole temperature and
voltage range
 Selectable inversion scheme for LCD driving waveforms: frame or line inversion
 Integrated temperature sensor with temperature readout
 On chip calibration of internal oscillator frequency and V
LCD
PCA9620
60 x 8 LCD high-drive segment driver for automotive and
industrial
Rev. 3 — 3 July 2013 Product data sheet
1. The definition of the abbreviations and acronyms used in this data sheet can be found in Section 20 on page 73.