HV574_13 Datasheet, PDF (1/7 Pages) Supertex, Inc – 100MHz, 80-Channel Serial to Parallel Converter with Push-Pull Outputs

Supertex inc.
HV574
100MHz, 80-Channel Serial to Parallel Converter
with Push-Pull Outputs
Features
►►HVCMOS^® technology
►►5.0V CMS Logic
►►Output voltage up to 80V
►►Low power level shifting
►►100MHz equivalent data rate using four
dynamic shift registers
►►Latched data outputs
►►Foreward and reverse shifting options (DIR pin)
►►Diode to VPP allows efficient power recovery
►►Outputs may be hot switched
General Description
The HV574 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 printer applications. It can also be used in any application
requiring multiple output high-voltage current sour-cing and sinking
capability such as driving plasma panels, vacuum fluorescent
displays, or large matrix LCD displays.
The device has 4 parallel 20-bit dynamic shift registers, permitting
data rates 4X the speed of one (they are clocked together). There
are 80 static latches and control logic to perform the polarity select
and blanking of the outputs. HV_OUT1 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 VDD. A data output buffer
is provided for cascading devices. This output reflects the current
status of the last bit of the shift register (HV_OUT80). Operation of the
shift register is not affected by the LE (latch enable), BL (blanking),
or the POL (polarity) inputs. Transfer 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.
Functional Block Diagram
VDD
LE
BL
POL
VPP
DIR
D_INA
D_OUTA
20-bit
Shift
Register
HV_OUT1
HV_OUT20
CLK
D_INB
D_OUTB
20-bit
Shift
Register
HV_OUT21
HV_OUT40
D_INC
D_OUTC
20-bit
Shift
Register
HV_OUT41
HV_OUT60
D_IND
D_OUTD
20-bit
Shift
Register
HV_OUT61
HV_OUT80
Doc.# DSFP-HV574
A061913
GND
Supertex inc.
www.supertex.com