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Hi-Rel processing available
General Description
The HV577 is a low-voltage serial to high-voltage parallel con-
verter with push-pull outputs. This device has been designed for
use as a driver for electroluminescent displays. It can also be used
in any application requiring multiple output high-voltage current
sourcing and sinking capability such as driving plasma panels,
vacuum fluorescent displays, or large matrix LCD displays.
The device has 4 parallel 16-bit shift registers, permitting data
rates 4X the speed of one ( they are clocked together). There are
also 64 latches and control logic to perform the polarity select and
blanking of the outputs. HVout1 is connected to the first stage of
the first shift register through the polarity and blanking logic. Data
is shifted through the shift registers on the logic low to high
transition of the clock. The DIR pin causes CCW shifting when
connected to GND, and CW shifting when connected to V
DD
. A
data output buffer is provided for cascading devices. This output
reflects the current status of the last bit of the shift register
(HV
OUT
64). Operation of the shift register is not affected by the LE
(latch enable), BL (blanking), or the POL (polarity) inputs. Trans-
fer of data from the shift registers to the latches occurs when the
LE (latch enable) input is high. The data in the latches is stored
when LE is low.
Absolute Maximum Ratings
Supply voltage, V
DD1
Output voltage, V
PP1
Logic input levels
1
Ground current
2
Continuous total power dissipation
3
Operating temperature range
Storage temperature range
Lead temperature 1.6mm (1/16 inch)
from case for 10 seconds
Plastic
Ceramic
-0.5V to +7.5V
-0.5V to +90V
-0.3V to V
DD
+0.3V
1.5A
1200mW
1900mW
Plastic
Ceramic
-40 to 85擄C
-55擄C to 125擄C
-65擄C to +150擄C
260擄C
Notes:
1. All voltages are referenced to GND.
2. Limited by the total power dissipated in the package.
3. For operation above 25擄C ambient derate linearly to maximum operating
temperature at 20mW/擄C for plastic and at 19mW/擄C for ceramic.
02/96/022
For detailed circuit and application information, please refer
to application note AN-H3.
Supertex Inc. does not recommend the use of its products in life support applications and will not knowingly sell its products for use in such applications unless it receives an adequate "products liability
indemnification insurance agreement." Supertex does not assume responsibility for use of devices described and limits its liability to the replacement of devices determined to be defective due to
workmanship. No responsibility is assumed for possible omissions or inaccuracies. Circuitry and specifications are subject to change without notice. For the latest product specifications, refer to the
Supertex website: http://www.supertex.com. For complete liability information on all Supertex products, refer to the most current databook or to the Legal/Disclaimer page on the Supertex website.
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