HV4622

Supertex inc. HV4622 32-Channel Serial to Parallel Converter with P-Channel Open Drain Outputs Features ►► Processed with HVCMOS® Technology ►► Output voltages to -220V ►► Source current minimum 60mA ►► Shift register speed 8.0MHz ►► Polarity and blanking inputs ►► CMOS compatible inputs ►► Forward and reverse shifting options ►► Can be used with the HV5622 to provide 220V push-pull operation ►► 44-lead PLCC surface mount package General Description The HV4622 is a low-voltage serial to high-voltage parallel converter with P-Channel open drain outputs. This device has been designed for use a driver for AC-electroluminescent displays. It can also be used in any application requiring multiple output high-voltage current source capabilities, such as driving inkjet and electrostatic print heads, plasma panels, or vacuum fluorescent displays. This device consists of a 32-bit shift register, 32 data latches, and control logic to perform polarity and blanking functions. Data is shifted through the shift register on the logic high-to-low transition of the clock. The HV4622 shifts in the clockwise direction (when viewed from the top of the package). A data output buffer is provided for cascading devices. This output reflects the current status of the last bit of the shift register. The data in the shift register is latched when the latch enable pin is brought to logic high, and then returned to ground. If the latch enable pin is held high, the latch becomes transparent and the shi...