Datasheet

2
Functional Diagram
TRUTH TABLE
INPUTS OUTPUTS
ABRQQ
HXHLH
XLHLH
L ↑ H
↓
HH
XXLLH
LH↑
(Note 3) (Note 3)
H = High Voltage Level, L = Low Voltage Level, X = Irrelevant, ↑ = Transition from
Low to High Level,
↓
= Transition from High to Low Level, = One High Level
Pulse, = One Low Level Pulse
NOTE:
1. For this combination the reset input must be low and the following sequence
must be used: pin 1 (or 9) must be set high or pin 2 (or 10) set low; then pin 1
(or 9) must be low and pin 2 (or 10) set high. Now the reset input goes from low-
to-high and the device will be triggered.
2R
11
2A
9
10
5
12
2Q
2Q
2B
MONO 2
V
CC
67
2C
X
2C
X
R
X
1R
3
1A
2
1
13
4
1Q
1Q
1B
MONO 1
V
CC
14 15
1C
X
1C
X
R
X
1C
X
1R
X
2C
X
2R
X
CD54HC221, CD74HC221, CD74HCT221