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Date: 6th Mar 2011
Key-input LCD control & driver IC
Holtek's HT16C22 follower chip, the new HT16K23 consumes
lesser power, offer increased noise immunity and ESD protection.
The HT16K23 is supplied in a 28-pin SOP package with two
pixel formats of 20 Segments x 4 Commons + 20 Input Keys
or 16 Segment x 8 Commons + 16 Input keys. Additional features
include internal display memory, an integrated RC oscillator
and a wide operating voltage of 2.4V~5.5V. The HT16K23 provides
key interrupt signals to the MCU thus reducing the requirement
for the MCU to repeatedly monitor the key status. The device
requires only two signal lines to communicate with the MCU
chip. As the device can detect key inputs, there are significant
reductions in MCU I/O pin requirements, as well as simplified
main board routing and reduced overall product costs.
The HT16K23 is suitable for use in LCD display control
and driving applications such as digital clocks, home appliances,
music systems, industrial metering etc.
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