Product Overview
HD44100FS 40-Output LCD Segment and Common Driver for HD44780-Class Controllers
Condition
Condition: unused new old stock (NOS). Sold each. Markings legible: Hitachi logo, HD44100FS, JAPAN.
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Product Overview
Hitachi's HD44100FS is an LCD driver with serial-to-parallel conversion: it takes serial display data from a display control LSI and drives the liquid crystal panel in parallel. Its 40 outputs run as two 20-bit channels and work as either common or segment drivers. In HD44780-based character LCD modules it is the extension driver that sits beside the controller.
Key Features
- Part number HD44100FS, Hitachi logo, made in Japan
- LCD driver with serial-to-parallel conversion
- 40 LCD driver outputs, arranged as two 20-bit channels
- Usable as a common driver or a segment driver
- Extension driver for HD44780-class character LCD controllers
- 60-pin plastic QFP, gull-wing leads on all four sides
Applications
- Repairing character LCD modules and instrument displays built on an HD44780 controller with HD44100 extension drivers
- Rebuilding vintage LCD boards that call for the 60-pin flat-pack HD44100FS footprint
- Experimenting with bare LCD glass, shifting serial data in and fanning it out to 40 lines
Frequently Asked Questions
Is the HD44100FS a display controller?
No. It is a driver. It needs an HD44780-class controller or another display control LSI feeding it serial data before it can run a display.
How many output lines does one HD44100FS supply?
Forty, in two 20-bit channels, so a panel needing 80 extra driver lines takes two chips.
Liquid crystal wears out under steady DC, so every line on the glass is driven with an alternating waveform, and this chip drives a whole bank of those lines from one serial stream. Sixty leads on four sides is hot-air work; set up the station before the module comes apart.
