HIT HD74HC4024 Datasheet
HD74HC4024
7-stage Binary Counter
Description
The HD74HC4024 is a 7-stage counter. This device is incremented on the falling edge (negative transition)
of the input clock, and all its output is reset to a low level by applying a logical high on its reset input.
Features
• High Speed Operation: tpd (Clock to Q1) = 14 ns typ (CL = 50 pF)
• 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 Reset Outputs State
L L No change
L H All outputs are low
H L No change
H H All outputs are low
L No change
H All outputs are low
L Advance to next state
H All outputs are low
HD74HC4024
Pin Arrangement
Block Diagram
Clock
Clock
Reset
Q
Q
Q
Q
GND
7
6
5
4
1
2
3
4
5
6
7
CRQ
C
R
Q
7
Q
6
Q
5
Q
4
(Top view)
CRQ
V
14
CC
NC
13
Q
1
Q
2
Q
3
12
11
10
9
8
CRQ
Q
Q
NC
Q
NC
1
2
3
CRQ
Q
Q
Q
Q
Reset
Q
1
Q
2
Q
6
Q
7
2
HD74HC4024
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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