Table of Contents
MULTI-INPUT NAND PAC, MODEL DC-335
The Multi-Input NAND PAC, Model DC-335 (Figures A-72 and A-73), contains
two 6-input NAND gates with nodes, and four 3-diode clusters.
The diode cluster nodes
can be connected to the gate nodes of this or other PACs to expand the number of gate in-
puts (Figure A-74).
INPUT AND OUTPUT SIGNALS
Gate Node. - -This point may be connected to diode cluster nodes to expand the number
of logic inputs.
The connecting wire between nodes should not be cabled, and should have a
maximum lead length of 3 in.
Gate Inputs. --Each gate performs the NAND function for positive logic (+6v = ONE,
Ov
=
ZERO).
For negative logic, it becomes a NOR gate.
When all inputs to a gate are at
+6v or not connected, the output is ground.
When any input is at ground, the output is +6v.
SPECIFICATIONS
Frequency of Operation (System)
DC to 5 me
Input Loading
1 unit load each
Fan-In
Refer to general specifications.
Output Drive Capability
8 unit loads each
APPLICATIONS
Circuit Delay
(Measured at + 1. 5v, averaged over two
stages)
33 nsec (max)':'
Current Requirements
t6v: 25 ma (max)
Power Dissipation
0. l 50w (max)
Handle Color Code
Red
Two NAND gates can be cross-coupled to form a de set-reset flip-flop.
The diode clusters, which are composed of discrete components, can be used to
expand the number of gate inputs as shown in Figure A-7 4.
The de-coupled gates operate on levels, pulses, or combinations of both.
'::30 nsec for gate plus 3 nsec for diode cluster
A-129
Table of Contents
