UCS-4815H

The UCS-4815H has the following features including High-Voltage Source Outputs;CMOS, PMOS, NMOS, TTL Compatible Inputs;Low-Power CMOS Latches;Internal Pull-Down Resistors;Wide Supply-Voltage Range;High-Reliability Screening to MIL-STD-883, Class B;Operating Temperature -55 to +125.

DESIGNED primarily for use with high-voltage vacuum-fluorescent displays, the UCS-481SH BiMOS integrated circuit has eight NPN Darlington source drivers with pull-down resistors, a CMOS latch for each driver, and common sTaoBE, BLANKING, and ENABLE fUnCtIOnS. The CMOS inputs cause minimum loading and are compatible with standard CMOS, PMOS, and NMOS logic commonly found in microprocessor designs. The use of CMOS latches also allows operation over a supply-voltage range of 5 V to IS V When employed with either standard TTL or low-speed TTL, UCS-4H15H may require the use of appropriate pull-up resistors.The bipolar outputs may be used as segment, dot (matrix), bar. or digit drivers in vacuum-fluorescent displays. Under normal operating conditions, these devices will sustain 25 mA per output at 500C and a duty cycle of 89"c. Other combinations of numbers of conducting outputs and duty cycle are shown in the specifications in this bulletin.A minimum component display subsystem, requiring few or no discrete components, may be assembled by using a UCS-4815H BiMOS latch/source driver with a UCS-4810H serial-to-parallel latch/drive.The UCS-4815H is furnished in 22-pin hermetic dual-in-line packages-To simplify printed wiring board layout, output pins on the package are opposite respective input pins.

Information present at an input is transferred to its latch when the STROBE is high. A high CLEAR input will set all latches to the output OFF condition regardless of the data or STROBE input levels. A high OUTPUT ENABLE will set all outputs to the OFF condition, regardless of any other input conditions. When the OUTPUT ENABLE is low, the outputs depend on the state of their respective latches.