DM7887
DM7887 is 8-digit high voltage anode driver manufactured by National Semiconductor.
description
The DM7887/DM8887 and DM7897/DM8897 ani designed to drive the individual anodes of a seven segment (cathodes) hlgh~voltage gas discharge panel In a time multiplexed fashion.
When driven with appropriate input, signals, the driver will switch voltage and impedance levels at the anode. This will allow or prevent Ionization of gas around selected cathode in order to form a numeric display. Their main application will be to act as buffers between MOS outputs (fully- decoded) and the anodes of a gas- discharge panel, since the devices can source up to 16 m A at a low impedance and can tolerate more than 55V In the off state.
DM7889/DM8889 is capable of driving eight segments of a hlgh- voltage display tube with a constant output sink current,...
