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DRIVER MATRIX PAC, MODEL CC-002
GENERAL DESCRIPTION
The Driver Matrix PAC, Model CC-002, contains a three-by-six diode-resistor
selection matrix and three transistor lamp driver circuits.
Each lamp driver is capable
of switching up to 40 ma of current from a positive supply of up to 28v.
The CC-002
operates from standard µ-PAC logic levels.
CIRCUIT FUNCTION
The selection matrix has six control lines, each of which cop.trols three inputs
(Figure A-19).
A positive supply (+6v} applied to a control line enables the three inputs
associated with it; a ground (Ov) will inhibit them.
During normal operation, only one control line is enabled, the others being held
at Ov.
When one of the inputs controlled by the enabled line is passive, the transistor in
that circuit is saturated and the lamp turns on.
When the input is active, the transistor
is biased off and the lamp is extinguished.
A resistor is connected across each of the lamp driver outputs to maintain a
small lamp current during its OFF state.
This prevents high transient currents from
occurring when the lamp is illuminated.
SPECIFICATIONS
Frequency of Operation
Output Drive Capability
DC to 200 kc
40 ma at +28v
Current Requirements
Input Loading
1 unit load
+6v: 5 ma (max, if only one control line
is enabled)
Power Dissipation
0. 1 w (max,
if
only one control
line is enabled)
NOTE
This document contains the information stated in
Revision A of 3C Document No. A008678.
A-25
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