DIONICS, INC.
65 Rushmore Street
Westbury, NY 11590
Phone: (516) 997-7474
Fax: (516) 997-7479
Website: www.dionics-usa.com
DI-8884A High Voltage Cathode Decoder/Driver
Direct Replacement for National DM-8884A
General Description:
The DI-8884A is designed to decode four
lines of BCD input and drive seven segment
digits of gas-filled readout displays. Two
separate inputs are provided for driving the
decimal point and comma cathodes.
All outputs consist of switchable and
programmable current sinks, which provide
constant current to the tube cathodes, even
with high tube anode supply tolerance.
Output currents may be varied over the 0.2
to 1.2 mA range for multiplex operation.
The output current is adjusted by connecting
an external program resistor (Rp) from Vcc to
the program input.
Features:
Reliable Dielectric Isolation Process
Current Sink Outputs
High Output Breakdown Voltage
Low Input Load Current
Intended For Multiplex Operation
Replacement For National DM-8884A
Standard 18-pin DIP Package
Package Layout:
Truth Table
Function
Decimal Point
Comma
D C B A a b c d e f g Display
0
1
1
0 0 0 0 0 0 0 0 0 0 1
1
1
1
0 0 0 1 1 0 0 1 1 1 1
2
1
1
0 0 1 0 0 0 1 0 0 1 0
3
1
1
0 0 1 1 0 0 0 0 1 1 0
4
1
1
0 1 0 0 1 0 0 1 1 0 0
5
1
1
0 1 0 1 0 1 0 0 1 0 0
6
1
1
0 1 1 0 0 1 0 0 0 0 0
7
1
1
0 1 1 1 0 0 0 1 1 1 1
8
1
1
1 0 0 0 0 0 0 0 0 0 0
9
1
1
1 0 0 1 0 0 0 0 1 0 0
10
1
1
1 0 1 0 1 1 0 0 0 1 1
11
1
1
1 0 1 1 1 1 0 0 0 1 0
12
1
1
1 1 0 0 0 0 1 1 1 0 0
13
1
1
1 1 0 1 0 1 1 0 0 0 0
14
1
1
1 1 1 0 1 1 1 1 1 1 0
15
1
1
1 1 1 1 1 1 1 1 1 1 1
*Decimal Point
0
1
X X X X X X X X X X X
*Comma
0
0
X X X X X X X X X X X
*Decimal point and Comma can be displayed with or without any numeral.
10/2004
0.900
DIONICS
DI-8884A
0.070
0.020
0.025
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