HV633

Supertex inc. 32-Channel, 128-Level Amplitude Gray-Shade Display Column Driver HV633 Features ►►HVCMOS® technology ►►5.0V CMOS inputs ►►Capable of 128 levels of gray shading ►►Modulation voltage up to +80V ►►24MHz data throughput rate ►►32 outputs per device (can be cascaded) ►►Pin-programmable shift direction (DIR) ►►D/A conversion cycle time is 20µs ►►Diodes in output structure allow usage in energy recovery systems ►►Available in 3-sided 64-lead gull wing package Applications ►►Electroluminescent Displays ►►Polycholesteric Displays General Description The HV633 is a 32-channel driver IC for gray shade display use. It is designed to produce varying output voltages between 3.0 - 80V. This amplitude modulation at the output is facilitated by an external ramp voltage VR. See Theory of Operation for detailed explanation. This device consists of dual 16-bit shift registers, 32 data latches and comparators, and control logic to preform 128 levels of gray shading. There are 7 bits of data inputs. Data is shifted through the shift registers at both edges of the clock, resulting in a data transfer rate of twice that of the shift clock frequency. When the DIR pin is high, CSI/CSO is the input/ output for the chip select pulse. When DIR is low, CSI/CSO is the output/input for the chip select pulse. When the DIR pin is high, it allows the HV633 to shift data in the counter-clockwise direction when viewed from the top of the package. When the DIR pin is low, data is shifted in the cl...