Description
FEATURES
• High-Voltage Source Outputs
• CMOS, PMOS, NMOS, TTL Compatible Inputs
• Low-Power CMOS Latches
• Hexadecimal Decoding
• Internal Pull-Up/Pull-Down Resistors
• Wide Supply Voltage Range
DESIGNED for use in high-voltage vacuum: fluorescent display driver applications, the UCN-4805A latched decoder/driver combines CMOS logic with bipolar source outputs. The device consists of eight high-voltage bipolar sourcing outputs, with internal pull-down resistors and CMOS input latches, hexadecimal decoder, and control circuitry (strobe and blanking). Type UCN-4805A is intended to serve as the segment driver with standard ?-segment displays incorporating a colon or decimal point. The integrated circuit uses hexadecimal decoding to display 0-9, A, b, C, d, E, and F. This BiMOS latched ecoder/driver has sufficient speed to permit operation with most microprocessor/ LSI-based systems. The CMOS input latches provide operation over the supply voltage range of 5 to 15 V with minimum logic loading. Internal output pull-down resistors eliminate the need for external components usually required for fluorescent display applications. When used with standard TTL or lowspeed TTL logic, the device may require employment of input pull-up resistors to insure a proper input logic high.
