HV57908_13 Datasheet, PDF (1/7 Pages) Supertex, Inc – 8MHz, 64-Channel Serial to Parallel Converter with Push-Pull Outputs

Supertex inc.
HV57908
8MHz, 64-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
►►8.0MHz data rate
►►Latched data outputs
►►Forward and reverse shifting options (DIR pin)
►►Diode to VPP allows efficient power recovery
►►Outputs may be hot switched
General Description
The HV57908 is a low voltage serial to high voltage parallel
converter with push-pull outputs. The device has been designed
for use as a driver for EL 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 consists of a 64-bit shift register, 64 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_OUT64). 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 input is high. The data in the
latches is stored when the LE is low.
Functional Block Diagram
POL
BL
LE
V_PP
D_I/OA
CLK
DIR
64-bit
Static Shift
Register
64 Latches
Doc.# DSFP-HV57908
A061913
D_I/OB
HV_OUT1
HV_OUT2
•
•
•
60 Additional
Outputs
•
•
•
HV_OUT63
HV_OUT64
Supertex inc.
www.supertex.com