HV57

The HV57 and HV58 are low-voltage serial to high-voltage parallel converters with push-pull outputs. These devices have been designed for use as drivers for AC-electroluminescent displays. They can also be used in any application requiring multiple output high-voltage current sourcing and sinking capabilities such as driving plasma panels, vacuum fluorescent displays, or large matrix LCD displays. The inputs are fully CMOS compatible. These devices consist of a 32-bit shift register, 32 latches, and control logic to perform the polarity select and blanking of the outputs. HVOUT1 is connected to the first stage of the shift register through the polarity and blanking logic. Data is shifted through the shift register on the logic low to high transition of the clock. The HV57 shifts data in the clockwise direction when viewed from the top of the package and the HV58 shifts in the counter- clockwise direction. A data output buffer is provided for cascading devices. This output reflects the current status of the last bit of the shift register EVOUTSZ). Operauon of the shift registgs, not affected by the LE (latch enable), BL (blanking), or the POL (polarity) inputs. Transfer of data from the shift register to the latch occurs when the LE (hatch enable) input is high. The data in the latch is stored when LE is low.

The features of HV57/HV58 can be summarized as (1)processed with HVCMOS@ technology; (2)output voltages to 80V; (3)source current minimum 20mA; (4)shift register speed 8MHz; (5)latched data outputs; (6)CMOS compatible inputs; (7)forward and reverse shifting options; (8)low power level shifting; (9)diode to VPP allows efficient power recovery.

The absolute maximum ratings of HV57/HV58 are (1)supply voltage, VDD: -0.5V to +15V; (2)supply voltage, VPP: -0.5V to +80V; (3)logic input levels: -0.5V to VDD +0.5V; (4)ground currents: 1.5A; (5)continuous total power dissipationt ceramic: 1500mW/Plastic: 1200mW; (6)lead temperature 1.6mm from case for 10 seconds: 260°C; (7)storage temperature range: -65°C to 150°C; (8) operating temperature range commercial :-40°C to +85°C/military -55°C to +125°C.