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EXPANDABLE NAND PAC, MODEL DN-335
The Expandable NAND PAC, Model DN-335 (Figures A-85 and A-86), contains
six 3-input NAND gates with nodes.
Gate nodes can be connected to the diode cluster nodes
of a DC-335 to expand the number of gate inputs.
Each gate performs the NAND function for positive logic, (+6v
=
ONE, Ov
ZERO}.
For negative logic, it becomes a NOR gate.
Two of the six gates have disconnected collector load resistors which are available
at the PAC terminals.
Outputs of these gates can be tied together, using one load resistor,
without decreasing the output drive capability.
INPUT AND OUTPUT SIGNALS
Inputs. - - When all inputs to a gate are at +6v or disconnected, the output is at
ground.
When any input is at ground, the output is +6v.
Node. - - By connecting this point to the nodes of diode clusters, the number of
gate inputs can be expanded.
The connecting wire between nodes should not be cabled, and
lead length should be kept under 3 inches.
Load. - - This point is internally connected through a collector load resistor to
+6v and is a collector termination for a collector output.
Collector Output. - - Every active collector output must be connected to a load
or a standard gate output.
Output. - - Each output terminal is internally connected to a collector load resistor.
If an output is connected to load points or other outputs, the output drive capability of the
structure is reduced.
SPECIFICATIONS
Frequency of Operation (System}
DC to 5 me
Input LoadinE>
1
unit load each
Fan-In
Refer to general specifications.
Output Drive Capability
8 unit loads
Outputs in Parallel
Refer to general specifications.
Circuit Delay
(Measured at+ 1. 5v, averaged over two
stages}
30 nsec (max}
Current Requirements
+6v:
75 ma (max}
Power Dissipation
0. 45w (max}
Handle Color Code
Red
A-151
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