DI-8884A Cathode Decoder/Driver Datasheet

DI-8884A Datasheet, PDF, Equivalent


Part Number

DI-8884A

Description

High Voltage Cathode Decoder/Driver

Manufacture

Dionics

Total Page 2 Pages
Datasheet
Download DI-8884A Datasheet


DI-8884A
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:
Features:
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.
www.DataSheet4U.com
9 Reliable Dielectric Isolation Process
9 Current Sink Outputs
9 High Output Breakdown Voltage
9 Low Input Load Current
9 Intended For Multiplex Operation
9 Replacement For National DM-8884A
9 Standard 18-pin DIP Package
Package Layout:
0.900
DIONICS
DI-8884A
0.020
™ Truth Table
0.025
0.070
Function
Decimal Point Comma D C B A a b c d e f g Display
0 1 1 00000000001
1 1 1 00011001111
2 1 1 00100010010
3 1 1 00110000110
4 1 1 01001001100
5 1 1 01010100100
6 1 1 01100100000
7 1 1 01110001111
8 1 1 10000000000
9 1 1 10010000100
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 XXXXXXXXXXX
*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

DI-8884A
DI-8884A High Voltage Cathode Decoder/Driver
™ Absolute Maximum Ratings
Input Voltage (Vcc)
Segment Output Voltage
Power Dissipation
Transient Segment Output Current
Operation Temperature Range
Storage Temperature Range
7V
110V
600mW
50mA
0 0C to 70 0C
-65 0C to 150 0C
™ Electrical Characteristics ( 0 0C < Ta < 70 0C - Unless otherwise noted; Vcc = 5V ± 5% )
Parameter
Conditions
Min. Max. Unit
Logic "1" Input Voltage
Vcc = 4.75V
2.0
Logic "0" Input Voltage
Vcc = 4.75V
Logic "1" Input Current
Vcc = 5.25V; Vin = 2.4V
Logic "0" Input Current
Vcc = 5.25V; Vin = 0.4V
Positive Input Clamp Voltage
Vcc = 4.75V; Iin = 1.0mA
5.0
Negative Input Clamp Voltage Vcc = 5.0 V; Iin = -12.0 mA; @Ta = 25 0C
Power Supply Current
Vcc = 5.25V; Rp = 2.8K; All Vin = 5V
V
1.0 V
15.0 µA
-250 µA
V
-1.5 V
40.0 mA
Segment Outputs
All Outputs On Current Ratio
All Vout = 50V
Output b Current = Ref.
0.9 1.1
Output b On Current
Vcc = 5V; Vout @ b=50V; @Ta = 25 0C
Rp = 18.1K
0.18 0.22 mA
Rp = 7.03K
0.45 0.55 mA
Rp = 3.40 K
0.90 1.10 mA
Output Leakage Current
Output Breakdown Voltage
Rp = 2.80K
Vout = 75V
Iout = 10µA
1.03 2.00 mA
5.0 µA
110 V
Propagation Delay
Any Input to Segment Output
Vcc = 5V; @Ta = 25 0C
10.0 µs
™ Pin Designation
DP
Vcc a b c d e f g OUT
18 17 16 15 14 13 12 11 10
123456789
Prog. A B C D DP COM COM GND
Input
IN IN OUT


Features DIONICS, INC. 65 Rushmore Street Westbur y, NY 11590 Phone: (516) 997-7474 Fax: (516) 997-7479 Website: www.dionics-us a.com DI-8884A High Voltage Cathode De coder/Driver Direct Replacement for Nat ional DM-8884A General Description: The DI-8884A is designed to decode four li nes of BCD input and drive seven segmen t digits of gas-filled readout displays . Two separate inputs are provided for driving the decimal point and comma cat hodes. All outputs consist of switchabl e and programmable current sinks, which provide constant current to the tube c athodes, even with high tube anode supp ly tolerance. Output currents may be va ried over the 0.2 to 1.2 mA range for m ultiplex operation. The output current is adjusted by connecting an external p rogram resistor (Rp) from Vcc to the pr ogram input. www.DataSheet4U.com Featu res: 9 9 9 9 9 9 9 Reliable Dielectric Isolation Process Current Sink Outputs High Output Breakdown Voltage Low Input Load Current Intended For Multiplex Operation Replacement For .
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