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Forward and reverse shifting options
General Description
The HV31 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 consists of a 64-bit shift register, 64 latches, latch
enable (LE), and 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 HV31 shifts in the counterclockwise
direction when viewed from the top of the package. When the DIR
pin is set low, the HV31 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.
Absolute Maximum Ratings
1
Supply voltage, V
DD
Supply voltage, V
PP
Logic input levels
Ground current
2
Continuous total power dissipation
2
Operating temperature range
Storage temperature range
-0.5V to +9V
-0.5V to +400V
-0.5V to V
DD
+0.5V
0.75A
1200mW
-40擄C to +85擄C
-65擄C to +150擄C
Notes:
1. All voltages are referenced to GND.
2. For operation above 25擄C ambient derate linearly by 20mW/擄C up to 85擄C.
02/96/022
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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