Overview
The LC7940YD and LC7941YD are segment driver ICs for driving large, dot–matrix LCD displays. They read 4–bit parallel or serial input, display data from a controller into an 80–bit latch, and then generate LCD drive signals corresponding to that data.

FEATUREs
• 80 built–in LCD display drive circuits
• 1/8 to l/128display duty cycle
• Serial or 4–bit parallel data input
• Chip disable for low power dissipation for large–sized panels
• Bias supply voltags can be supplied externally
• Operating supply voltage and ambient temperature
  - 2.7 to 5.5 V logic supply ( VDD) at Ta = –20 to +85°C
  - 8 to 20V LCD supply (VDD –VEE) at Ta = –20 to +85 °C
• CMOS process
• 100–pin flat plastic package