PCA9620
60 x 8 LCD high-drive segment driver for automotive and
industrial
Rev. 3 — 3 July 2013
Product data sheet
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 I2C-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 VDD2
400 kHz I2C-bus interface
Selectable linear temperature compensation of VLCD
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 VLCD
1. The definition of the abbreviations and acronyms used in this data sheet can be found in Section 20 on page 73.