General Description
HT16511 is a VFD (Vacuum Fluorescent Display) controller/driver that is driven on a 1/8 to 1/16 duty factor. It consists of 12 segment output lines, 8 grid output lines, 8 segment/grid output drive lines, 5 LED output ports, a control circuit, a display memory, and a key scan circuit. Serial data inputs to the HT16511 through a three-line serial interface. This VFD controller/driver is ideal as a peripheral device for an MCU.

FEATUREs
• Logic voltage: 5V
• High-voltage output: VDD-35V max.
• Multiple display
   (12-segment & 16-digit to 20-segment & 8-digit)
• 12 x 4 matrix key scanning
• 8 steps dimmer circuit
• 5 LED output ports (20mA max.)
• 4-bit general purpose input port
• No external resistors necessary for driver output
   (provides PMOS open-drain and pull-low resistor output)
• Serial interface with MCU (CLK, CS, DI, DO)
• 52-pin QFP package

APPLICATIONs
• Consumer products panel function control
• Industrial measuring instrument panel function control
• Other similar application panel function control