HIT HD74HC4022 Datasheet
HD74HC4022
Octal Counters/Dividers
Description
The HD74HC4022 is a four-stage Johson octal counter with built-in code converter. High speed operation
and spike-free outputs are obtained by use of a Johson octal counter design. The eight decoded outputs are
normally low, and go high only at their appropriate octal time period. The output changes occur on the
positive-going edge of the clock pulse. This part can be used in frequency division application as well as
octal counter or octal decode display applications.
Features
• High Speed Operation
• High Output Current: Fanout of 10 LSTTL Loads
• Wide Operating Voltage: VCC = 2 to 6 V
• Low Input Current: 1 µA max
• Low Quiescent Supply Current: ICC (static) = 4 µA max (Ta = 25°C)
Function Table
Clock Clock Enable Reset Output n
LX L n
XH L n
L L n + 1
XL n
H L n + 1
X Ln
XX H Q
X: Irrelevant
n < 4 ··· Carry = H
n ≥ 4 ··· Carry = L
0
HD74HC4022
Pin Arrangement
Logic Diagram
Q
Q
Q
Q
Q
NC
Q
GND
1
1
Q
2
0
3
2
4
5
5
6
1
Q
0
Q
2
Q
5
Q
6
6
7
3
Q
3
CE
Cout
Q
Q
R
C
4
7
8
16
15
14
13
12
11
10
9
V
CC
Reset
Clock
Clock
enable
Cout
Q
4
Q
7
NC
(Top view)
DQ
CK
R
Q
Q
0
Q
1
Q
2
Q
3
Q
4
Q
5
Q
6
Q
7
Clock
enable
Clock
DQ
CK
R
DQ
CK
R
DQ
CK
R
Q
Q
Q
Cout
Reset
2
HD74HC4022
DC Characteristics
Ta = –40 to
Ta = 25°C
Item Symbol V
Input voltage V
IH
(V) Min Typ Max Min Max Unit Test Conditions
CC
2.0 1.5 — — 1.5 — V
4.5 3.15 — — 3.15 —
6.0 4.2 — — 4.2 —
V
IL
2.0 — — 0.5 — 0.5 V
4.5 — — 1.35 — 1.35
6.0 — — 1.8 — 1.8
Output voltage V
OH
2.0 1.9 2.0 — 1.9 — V Vin = VIH or VILIOH = –20 µA
4.5 4.4 4.5 — 4.4 —
6.0 5.9 6.0 — 5.9 —
4.5 4.18 — — 4.13 — IOH = –4 mA
6.0 5.68 — — 5.63 — IOH = –5.2 mA
V
OL
2.0 — 0.0 0.1 — 0.1 V Vin = VIH or VILIOL = 20 µA
4.5 — 0.0 0.1 — 0.1
6.0 — 0.0 0.1 — 0.1
4.5 — — 0.26 — 0.33 IOL = 4 mA
6.0 — — 0.26 — 0.33 IOL = 5.2 mA
Input current Iin 6.0 — — ±0.1 — ±1.0 µA Vin = VCC or GND
Quiescent supply
I
CC
6.0 — — 4.0 — 40 µA Vin = VCC or GND, Iout = 0 µA
current
+85°C
3
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