HV633PG-G Datasheet, PDF (1/13 Pages) Supertex, Inc – 32-Channel, 128-Level Amplitude Gray-Shade Display Column Driver

Supertex inc.
HV633
32-Channel, 128-Level Amplitude
Gray-Shade Display
Column Driver
Features
► HVCMOS^® technology
► 5.0V CMOS inputs
► Capable of 128 levels of gray shading
► Modulation voltage up to +80V
► 24MHz data throughput rate
► 32 outputs per device (can be cascaded)
► Pin-programmable shift direction (DIR)
► D/A conversion cycle time is 20µs
► Diodes in output structure allow usage in energy
recovery systems
► Available in 3-sided 64-lead gullwing package
Applications
► Electroluminescent Displays
► Polycholesteric 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 V_R. 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 V_PP through the body diode of
the output transistor.
Functional Block Diagram
V_DD
V_R
V_PP
CSI
SC
LC
CC
CSO
DIR
7
D1 - D7
Low Voltage
Shift Register
Latches
Comparator
Counter
High Voltage
32 ^{Source Follower}
Output Buffer
I_BIAS Control
HV_OUT1
~~
HV_OUT32
VCTL RCTL
Supertex inc. ● 1235 Bordeaux Drive, Sunnyvale, CA 94089 ● Tel: [phone] ● www.supertex.com