HV4937

Not recommended for new designs.

The HV4937 is a low voltage serial to high voltage parallel converter with open drain outputs. It has been designed especially for use as a driver for electrostatic printers.

This device HV4937 consists of a 64-bit shift register, 64 latches, a latch enable (LE), and an output enable (OE). Data is shifted through the shift register on the high to low transition of the clock. When the DIR pin is set high, the HV49 shifts in the counterclockwise direction when viewed from the top of the package. When the DIR pin is set low, the HV4937 shifts in the clockwise direction. A serial data output buffer is provided for cascading devices. This output reflects the current status of the last bit of the shift register. Operation of the shift register is not affected by the LE or the OE inputs. Transfer of data from the shift register to the latch occurs when the LE input is high. The data in the latch is stored when LE is low.