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HV633_14 Datasheet, PDF (1/12 Pages) Supertex, Inc – 32-Channel, 128-Level Amplitude Gray-Shade Display Column Driver | |||
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Supertex inc.
32-Channel, 128-Level Amplitude
Gray-Shade Display
Column Driver
HV633
Features
âºâºHVCMOS® technology
âºâº5.0V CMOS inputs
âºâºCapable of 128 levels of gray shading
âºâºModulation voltage up to +80V
âºâº24MHz data throughput rate
âºâº32 outputs per device (can be cascaded)
âºâºPin-programmable shift direction (DIR)
âºâºD/A conversion cycle time is 20µs
âºâºDiodes in output structure allow usage in energy
recovery systems
âºâºAvailable in 3-sided 64-lead gull wing package
Applications
âºâºElectroluminescent Displays
âºâºPolycholesteric Displays
General Description
The HV633 is a 32-channel driver IC for gray shade display
use. It is designed to produce varying output voltages between
3.0 - 80V. This amplitude modulation at the output is facilitated
by an external ramp voltage VR. See Theory of Operation for
detailed explanation.
This device consists of dual 16-bit shift registers, 32 data
latches and comparators, and control logic to preform 128
levels of gray shading. There are 7 bits of data inputs. Data is
shifted through the shift registers at both edges of the clock,
resulting in a data transfer rate of twice that of the shift clock
frequency. When the DIR pin is high, CSI/CSO is the input/
output for the chip select pulse. When DIR is low, CSI/CSO is
the output/input for the chip select pulse. When the DIR pin is
high, it allows the HV633 to shift data in the counter-clockwise
direction when viewed from the top of the package. When the
DIR pin is low, data is shifted in the clockwise direction. The
output circuitry allows the energy which is stored in the output
capacitance to be returned to VPP through the body diode of
the output transistor.
Functional Block Diagram
VDD
VR
VPP
CSI
SC
LC
CC
CSO
DIR
7
D1 - D7
Low Voltage
Shift Register
Latches
Comparator
Counter
High Voltage
32 Source Follower
Output Buffer
IBIAS Control
HVOUT1
~~
HVOUT32
VCTL RCTL
Doc.# DSFP-HV633
C031414
Supertex inc.
www.supertex.com
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