HV574(2008) データシートの表示（PDF） - Supertex Inc
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HV574 Datasheet PDF : 7 Pages
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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
► Hi-Rel processing available
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, vac-
uum 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. 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
VDD. A data output buffer is provided for cascading devices. This
output reflects the current status of the last bit of the shift register
(HVOUT80). 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 IN A
DOUT A
CLK
D IN B
DOUT B
D IN C
DOUT C
D IN D
DOUT D
20-bit
shift
register
20-bit
shift
register
20-bit
shift
register
20-bit
shift
register
HV OUT 1
HV OUT 20
HV OUT 21
HV OUT 40
HV OUT 41
HV OUT 60
HV OUT 61
HV OUT 80
GND
● 1235 Bordeaux Drive, Sunnyvale, CA 94089 ● Tel: 408-222-8888 ● www.supertex.com
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