Supertex inc.
Supertex inc. ● 1235 Bordeaux Drive, Sunnyvale, CA 94089 ● Tel: 408-222-8888 ● www.supertex.com
HV5308B
Features
► Processed with HVCMOS
®
technology
► Low power level shifting
► Source/sink current minimum 20mA
► Shift register speed 8.0MHz
► Latched data outputs
► CMOS compatible inputs
► Forward and reverse shifting options
► Diode to VPP allows efcient power recovery
General Description
The HV5308B is a low voltage serial to high voltage parallel
converter with push-pull outputs. This device has been designed
for use as a driver for AC-electroluminescent displays. It can also
be used in any application requiring multiple output high voltage
current sourcing and sinking capabilities, such as driving plasma
panels, vacuum uorescent, or large matrix LCD displays.
The HV5308B consists of a 32-bit shift register, 32 latches, and
control logic to enable outputs. Q1 is connected to the rst stage
of the shift register through the Output Enable logic. Data is shifted
through the shift register on the low to high transition of the clock.
When viewed from the top of the package, the HV5308B shifts
in the clockwise direction. A data output buffer is provided for
cascading devices. This output reects the current status of the
last bit of the shift register (32). Operation of the shift register is
not affected by the LE (latch enable) or the OE (output enable)
inputs. Transfer of data from the shift register to the latch occurs
when the LE input is high. The data in the latch is retained when
LE is low.
Typical Application Circuit
32-Channel Serial to Parallel Converter
With High Voltage Push-Pull Outputs
DATA
INPUT
CLK
LE
OE
HV
OUT
1
Micro
Processor
Supertex HV5308B
Display
Panel
Columns
Row
Driver
HV
OUT
32
Data Input
for cascading the next HV5308B
DATA
OUT
Low Voltage
High Voltage
Shift Register
Latches
Output Contr.
Level
Translators
&
Push-Pull
Output
Buffers
VPP
VDD
