HI-8040 - Holt Integrated Circuits

HI-8040 CMOS HIGH VOLTAGE DISPLAY DRIVER

The HI-8040 is a CMOS integrated circuit designed for high voltage LCD display drive applications. It can drive 85 segments at voltages between +5 and -30 volts. An optional negative converter can generate the negative display drive voltage. Test inputs facilitate opens and shorts testing. The backplane frequency is checked and, as long as power is available.

Features

! 4 MHz serial input data rate ! 85 segment outputs ! Cascadable ! 5 Volt inputs translated to 35 Volts ! Test pins allow hardware all "ON", all "OFF" or alternating ! Monitors backplane oscillation and forces all segments to "OFF" condition if below 10Hz ! Negative voltage converter available on-chip ! CMOS low power ! Military processing available FUNCTIONAL BLOCK DIAGRAM DIN CL CS LD BPOSC BPIN Þ Þ Þ DATA IN 85 Stage Shift Register CLK DOUT 85 LE Þ Þ Þ 85 Bit Latch Oscillator Divider Voltage Translator H i g h Voltage Buffer Voltage Translators H i g h Voltage Drivers Þ BP 85 SE.