HV632 Supertex, Inc., HV632 Datasheet

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HV632

Manufacturer Part Number
HV632
Description
32-channel 256 Gray-shade High Voltage Driver
Manufacturer
Supertex, Inc.
Datasheet
Features
Applications
❏ Field Emission Displays (FED)
❏ Polymer Liquid Crystal Displays (PLCD)
❏ Vacuum Fluorescent Displays (VFD)
Typical Application
07/08/03
Supertex Inc. does not recommend the use of its products in life support applications and will not knowingly sell its products for use in such applications unless it receives an adequate "products liability
indemnification insurance agreement." Supertex does not assume responsibility for use of devices described and limits its liability to the replacement of devices determined to be defective due to
workmanship. No responsibility is assumed for possible omissions or inaccuracies. Circuitry and specifications are subject to change without notice. For the latest product specifications, refer to the
Supertex website: http://www.supertex.com. For complete liability information on all Supertex products, refer to the most current databook or to the Legal/Disclaimer page on the Supertex website.
HVCMOS
5V CMOS inputs
Up to 80V output voltage
PWM gray shade conversion
Capable of 256 levels of gray shading
10MHz shift and count clock frequency
20MHz data throughput rate
8 bit data bus
32 outputs per device
BLANK function
Output polarity control
Processor
Micro
®
technology
32-Channel 256 Gray-Shade High Voltage Driver
CSI
D IN(1-8)
for cascading the next HV632
CSO
CSI
CC
BL
POL
SC
LC
Shift Register
Power Supply
Low Voltage
Comparators
Low Voltage
Latches
Counter
Supertex HV632
32
Translators
Push-Pull
Buffers
Output
Power Supply
High Voltage
Level
&
1
H i gh Voltage
General Description
The HV632 is a 32-channel gray-shade column driver IC de-
signed for driving electrofluorescent displays. Using Supertex’s
unique HVCMOS
shading by PWM conversion.
Input data, in groups of eight, is latched into a set of data latches
on both edges of the shift clock. The data shifted in the first data
latch corresponds to HV
to HV
of the master binary counter which counts on both edges of the
count clock. Each time the master counter begins to decrement
from 1111 1111, the data in the data latches are compared with
the contents of the counter; if they match, the corresponding
outputs will go high. The master counter counts down to 0000
0001 and then starts to count up again. The outputs that are at
high will stay at high until the contents of the counter match the
data in the data latches again. Therefore, the higher the binary
data in the data latches, the longer the outputs will stay at high.
Thus, different high voltage pulse widths are produced. When
the counter reaches its 1111 1111 count while counting up,
the device is ready for the next operation cycle. A data value of
0000 0000 produces no pulse; the output stays low.
The BLANK input signal will reset the master counter to all ones
(1111 1111) and set all high voltage outputs to low, or will set all
high voltage outputs to high state, when the POL is low. The POL
input signal, forced low, will invert the polarity of the output pulse.
If left unconnected, POL input will be pulled high to V
chip resistor.
HVout1
HVout32
OUT
2, and so on. These data are compared to the contents
®
technology, it is capable of 256 levels of gray
OUT
1, the second data latch corresponds
(Cathodes)
Display
Colunms
Panel
(FED)
HV632
HV57908
Driver
Scan
DD
by an on-
HV632

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HV632 Summary of contents

Page 1

... Supertex website: http://www.supertex.com. For complete liability information on all Supertex products, refer to the most current databook or to the Legal/Disclaimer page on the Supertex website. General Description The HV632 is a 32-channel gray-shade column driver IC de- signed for driving electrofluorescent displays. Using Supertex’s unique HVCMOS shading by PWM conversion ...

Page 2

... Units Conditions 10MHz 10MHz SC CC µA All V = GND, Count Clock = V IN µ µ GND =0.9 V OUT =0.1 V OUT DD Units Conditions µA All HV low or high OUT mA HV =75V OUT mA HV =5V OUT mA C =0pF, F =10Mhz L CC HV632 DD ...

Page 3

... OUT High-voltage outputs Positive high-voltage supply Low-voltage digital supply voltage High voltage ground Digital ground 3 Units Conditions MHz MHz MHz 15pF 15pF =15pF =15pF L Units Conditions °C HV632 ...

Page 4

... Logic & Latch 3 8 ≈ ≈ ≈ Comparator Logic & Latch Bit > Counter Load Blank Count L/T L/T L/T ≈ ≈ ≈ L GND Count Clock L/T = Level Translator HV632 OUT HV 2 OUT HV 3 OUT • • • OUT GND ...

Page 5

... Count Clock HV OUT V DD Data Out GND Logic Data Output 16 1 255 254 253 252 1 1 255 254 253 252 GND High Voltage Output VALID DATA 252 253 254 255 252 253 254 255 HV632 OUT ...

Page 6

... BLD 90% 50 254 6 t CSOL NEXT LOADING CYCLE SC1 SCN DATA DATA DATA SET 2 SET 2N -1 SET 2N 50% 50% t CCD 90% 10% t CDD 50 HV632 GND V IH ...

Page 7

... OUT 26 Blank 58 HV OUT OUT OUT OUT N/C 31 Count Clock 63 N/C 32 POL 64 N/C Package Outline 3-sided Plastic 64-pin Gullwing Package Index top view HV632 ...

Page 8

... REF B (1.016) e 0.0315 (0.800) 0° − 7° 0.118 ± 0.010 A (2.9972 ± 0.254) Dimensions in Inches (Dimensions in Millimeters) 1235 Bordeaux Drive, Sunnyvale, CA 94089 TEL: (408) 222-8888 • FAX: (408) 222-4895 www.supertex.com HV632 0° – 10° 07/08/03rev.2 ...

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