Supertex inc.
20-Channel, Serial-Input,
Vacuum-Fluorescent
Display Driver for Anode/Grid
Features
►
HVCMOS
®
technology for high performance
►
Operating voltage up to 80V
►
High speed source driver
►
5.0V CMOS logic circuitry
►
Up to 5.0MHz data input rate
►
Excellent noise immunity
►
Flexible high voltage supplies
HV5812
General Description
The Supertex HV5812 is a 20-channel, serial input, vacuum-
fluorescent display driver. It combines a 20-bit CMOS shift
register, data latches, and control circuitry with high voltage
MOSFET outputs. The HV5812 is primarily designed for vac-
uum-fluorescent displays.
The CMOS shift register and latches allow direct interfacing
with microprocessor based systems. Data input rates are typi-
cally over 5.0MHz with 5.0V logic supply. Especially useful for
interdigit blanking, the BLANKING input disables the output
source drives and turns on the sink drivers. Use with TTL may
require external pull-up resistors to ensure an input logic high.
Functional Block Diagram
BL
STROBE
VDD
VPP
HV
OUT
1
HV
OUT
2
DATA IN
CLK
DATA OUT
GND
20-bit
Shift
Register
20-bit
Latch
HV
OUT
3
HV
OUT
20
Doc.# DSFP-HV5812
C072413
Supertex inc.
www.supertex.com
SUPERTEX [ Supertex, Inc ]
