HP 5340A Service Manual

Model 5340A
Theory of Operation
tn
INPUT
D
L
H
Figure 4-21. Dual D - Type Edge Trigger Flip - Flops 1820 - 0596
tn+ 1
OUTPUTS
Q 0
L H
H L
-
TRUTH TABLE (Each FlipFlop)
13 -
3 -
I
so 'Oa la Za'3ai Ob'lb'21>'31>
9309
Sl
2, =a ' ZI, Zb
NOTES: A. t, = bit time before clock pulse.
6. t,+l = bit time after clock pulse.
12a
X
X
X
X
L
H
X
X
12b
X
X
X
X
L
H
X
X
2 2 2
Vcc CLEAR 20 CLOCK PRESET 20 25
13a
X
X
X
X
X
X
L
H
I 3b
X
X
X
X
X
X
L
H
t
L
A
t,
IH
/I /H
IH
CLOCK a CLOCK 8
PRESET
X
X
X
X
X
I 1 1 I I
-
1 10 1 I 10 10 GND
CLEAR CLOCK PRESET
asynchronous inputs:
Low input to preset sets 0 to high level
Low input to clear sets 0 to low level
Preset and clear are independent
of clock
Figure 4 - 22. Four - Input Multiplexer 1820 - 0610
14 15 2 1
INPUTS
L
L
H
H
L
L
H
H
SO
L
L
H
H
L
L
H
H
7
II
I la
X
X
L
H
X
X
X
X
Ilb
X
X
L
H
X
X
X
X
-
L = LOW Voltage Level
H = HIGH Voltage Level
X = Either HIGH or LOW Logic Level
OUTPUTS
Za
L
H
L
H
L
H
L
H
zb
L
H
L
H
L
H
L
H
--
-
za
H
L.
H
L
H
L
H
L
zb
H
L
H
L
H
L
H
L
-
4 - 15

HP 5340A Specifications

General

Brand	HP
Model	5340A
Category	Cash Counter
Language	English