• Significant Power Reduction Compared to LSTTL
Logic ICs
• HC Types
- 2V to 6V Operation
- High Noise Immunity: N
= 60 MHz at VCC = 5V, CL = 15pF,
MAX
= 30%, NIH = 30% of V
IL
o
C to 125oC
CC
CD74HCT4024
High Speed CMOS Logic
7-Stage Binary Ripple Counter
at VCC = 5V
• HCT Types
- 4.5V to 5.5V Operation
- Direct LSTTL Input Logic Compatibility,
V
= 0.8V (Max), VIH = 2V (Min)
IL
- CMOS Input Compatibility, I
Description
The Harris CD74HC4024 and CD74HCT4024 are 7-stage
ripple-carry binary counters. All counter stages are masterslave flip-flops. The state of the stage advances one count
on the negative transition of each input pulse; a high voltage
level on the MR line resets all counters to their zero state. All
inputs and outputs are buffered.
Ordering Information
PART NUMBER TEMP. RANGE (oC) PACKAGE
CD74HC4024E-55 to 12514 Ld PDIPE14.3
CD74HCT4024M-55 to 12514 Ld SOICM14.15
≤ 1µA at VOL, V
l
OH
PKG.
NO.
Pinout
CD74HC4024, CD74HCT4024
(PDIP, SOIC)
TOP VIEW
CP
MR
Q
Q
Q
Q
GND
1
2
3
7
4
6
5
5
6
4
7
V
14
NC
13
12
Q
11
Q
NC
10
9
Q
NC
8
CC
1
2
3
’
CAUTION: These devices are sensitive to electrostatic discharge. Users should follow proper IC Handling Procedures.
Copyright
CAUTION: Stresses above those listed in “Absolute Maximum Ratings” may cause permanent damage to the device. This is a stress only rating and operation
of the device at these or any other conditions above those indicated in the operational sections of this specification is not implied.
NOTE:
3. θJA is measured with the component mounted on an evaluation PC board in free air.
NOTE: Outputs should be switching from 10% VCC to 90% VCC in
accordance with device truth table.For f
, input duty cycle = 50%.
MAX
FIGURE 1. HC CLOCK PULSE RISE AND FALLTIMES AND
PULSE WIDTH
fC
50%
I
L
V
CC
GND
NOTE: Outputs should be switching from 10% VCC to 90% VCC in
accordance with device truth table.For f
25oC-40oC TO 85oC -55oCTO125oC
UNITSMINTYP MAXMINMAXMINMAX
t
rCL
CLOCK
= 6ns
0.3V
2.7V
1.3V
0.3V
t
t
fCL
WL
= 6ns
+ tWH=
t
WL
1.3V
t
WH
, input duty cycle = 50%.
MAX
I
fC
3V
1.3V
GND
FIGURE 2. HCT CLOCK PULSE RISE AND FALLTIMES AND
PULSE WIDTH
L
tr = 6nstf = 6ns
V
t
CC
GND
TLH
INPUT
t
INVERTING
OUTPUT
THL
t
PHL
90%
50%
10%
t
PLH
90%
50%
10%
FIGURE 3. HC AND HCU TRANSITION TIMES AND PROPAGA-
TION DELAY TIMES, COMBINATION LOGIC
= 6ns
t
PLH
t
f
1.3V
10%
90%
t
3V
GND
TLH
tr = 6ns
INPUT
INVERTING
OUTPUT
t
THL
t
2.7V
1.3V
0.3V
PHL
FIGURE 4. HCT TRANSITION TIMES AND PROPAGATION
DELAY TIMES, COMBINATION LOGIC
6
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accordance with TI’s standard warranty. Testing and other quality control techniques are utilized to the extent
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performed, except those mandated by government requirements.
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DEATH, PERSONAL INJURY, OR SEVERE PROPERTY OR ENVIRONMENTAL DAMAGE (“CRITICAL
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BE FULLY AT THE CUSTOMER’S RISK.
In order to minimize risks associated with the customer’s applications, adequate design and operating
safeguards must be provided by the customer to minimize inherent or procedural hazards.
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intellectual property right of TI covering or relating to any combination, machine, or process in which such
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party’s products or services does not constitute TI’s approval, warranty or endorsement thereof.
Copyright 1999, Texas Instruments Incorporated
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