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HV62208

32-Channel 256 Gray-Shade High Voltage Driver

Absolute Maximum Ratings

-0.5V to +7.5V

Supply voltage, V

PP

-0.5V to +80V

-15V to 0V

Logic input levels

Continuous total power dissipation

1.2W

Operating temperature range

-40°C to +85°C

Storage temperature range

-65°C to +150°C

Notes:

All voltages are referenced to GND.

Maximum V

For operation above 25°C ambient derate linearly to 85°C at 20mW/°C.

Features

❏ 5V CMOS inputs

❏ Up to 80V output voltage

❏ PWM gray shade conversion

❏ Capable of 256 levels of gray shading

❏ Balanced shift clock complies with RS-422

❏ 8MHz shift and count clock frequency

❏ 16MHz data throughput rate

❏ 8 bit data bus

❏ 32 outputs per device

❏ BLANK function

General Description

Not recommended for new designs. Please use HV632 instead.

The HV622 is a 32-channel gray-shade column driver IC de-

signed for driving electrofluorescent displays. Using Supertex’s

shading by PWM conversion.

The shift clock is a balanced clock with electrical characteristics

complying with EIA RS-422 standard. 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

These data are compared to the contents 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.

02/96/022

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.

Ordering Information

Package Option

Device

64-Lead 3-Sided Plastic Gullwing

Die

HV62208

HV62208PG

HV62208X