MOTOROLA MC74AC4020D

14-STAGE
BINARY RIPPLE
COUNTER
The MC74AC4020 consists of 14 master-slave flip-flops with 12 stages
brought out to pins. The output of each flip-flop feeds the next and the frequency
at each output is half that of the preceding one. The state of the counter
advances on the negative-going edge of the Clock input. Reset is asynchronous
and active-high.
State changes of the Q outputs do not occur simultaneously because of internal
ripple delays. Therefore, decoded output signals are subject to decoding spikes
and may have to be gated with the Clock of the MC74AC4020 for some designs.
•
•
•
•
140 MHz Typ. Clock
Outputs Source/Sink 24 mA
Operating Voltage Range: 2.0 to 6.0 V
High Noise Immunity
VCC
16
Q11
Q10
Q8
Q9
15
14
13
12
RESET CLK
11
N SUFFIX
CASE 648-08
PLASTIC
Q1
10
9
1
2
3
4
5
6
7
8
Q12
Q13
Q14
Q6
Q5
Q7
Q4
GND
D SUFFIX
CASE 751B-05
PLASTIC
LOGIC DIAGRAM
FUNCTION TABLE
Clock
X
Reset
Output State
L
No Change
9
7
L
Advance to next state
5
H
All Outputs are low
4
CLOCK
10
6
13
12
14
15
1
2
3
RESET
11
PIN 16 = VCC
PIN 8 = GND
FACT DATA
5-1
Q1
Q4
Q5
Q6
Q7
Q8
Q9
Q10
Q11
Q12
Q13
Q14
MC74AC4020
MAXIMUM RATINGS*
Symbol
Parameter
Value
Unit
–0.5 to +7.0
V
V
VCC
DC Supply Voltage (Referenced to GND)
Vin
DC Input Voltage (Referenced to GND)
–0.5 to VCC +0.5
Vout
DC Output Voltage (Referenced to GND)
–0.5 to VCC +0.5
V
Iin
DC Input Current, per Pin
±20
mA
Iout
DC Output Current, per Pin
±50
mA
ICC
DC VCC or GND Current per Output Pin
±50
mA
PD
Power Dissipation in Still Air
Plastic**
SOIC Package**
750
500
mW
Tstg
Storage Temperature
TL
Lead Temperature, 1 mm from Case for 10 seconds
(Plastic DIP or SOIC Package)
–65 to +150
°C
260
°C
* Maximum Ratings are those values beyond which damage to the device may occur.
** Derating: Plastic DIP: – 10mW/°C from 65°C to 125°C
SOIC Package: –7.0 mW/°C from 65°C to 125°C
RECOMMENDED OPERATING CONDITIONS
Symbol
Parameter
Min
Max
Unit
V
VCC
DC Supply Voltage (Referenced to GND)
2.0
6.0
Vin/Vout
Input Voltage, Output Voltage (Ref. to GND)
0
VCC
TA
Operating Temperature, All Package Types
–40
+85
°C
tr/tf
Input Rise/Fall Time
(Figure 1)
0
0
0
150
40
25
ns/V
VCC = 3.0 V
VCC = 4.5 V
VCC = 5.5 V
FACT DATA
5-2
MC74AC4020
DC CHARACTERISTICS (unless otherwise specified)
Symbol
Parameter
Value
Unit
ICC
Maximum Quiescent Supply Voltage
80
µA
Vin = VCC or GND
VCC = 5.5 V,
TA = Worst Case
ICC
Maximum Quiescent Supply Current
8.0
µA
Vin = VCC or GND
VCC = 5.5 V,
TA = 25°C
DC CHARACTERISTICS
Symbol
Parameter
VCC
(V)
74AC
74AC
TA = +25°C
TA =
–40°C to +85°C
Typ
VIH
VIL
VOH
Guaranteed Limits
3.0
4.5
5.5
2.1
3.15
3.85
2.1
3.15
3.85
V
VOUT = 0.1 V
or VCC – 0.1 V
Maximum Low Level
Input Voltage
3.0
4.5
5.5
0.9
1.35
1.65
0.9
1.35
1.65
V
VOUT = 0.1 V
or VCC – 0.1 V
Minimum High Level
Output Voltage
3.0
4.5
5.5
2.9
4.4
5.4
2.9
4.4
5.4
V
2.56
3.86
4.86
2.46
3.76
4.76
0.1
0.1
0.1
0.1
0.1
0.1
3.0
4.5
5.5
0.36
0.36
0.36
0.44
0.44
0.44
5.5
±0.1
Maximum Low Level
Output Voltage
IIN
Maximum Input
Leakage Current
IOLD
Minimum Dynamic
Output Current**
IOHD
Conditions
Minimum High Level
Input Voltage
2.99
4.49
5.49
3.0
4.5
5.5
VOL
Unit
3.0
4.5
5.5
0.002
0.001
0.001
IOUT = –50 µA
V
*VIN = VIL or VIH
–12 mA
IOH
–24 mA
–24 mA
IOUT = 50 µA
V
V
*VIN = VIL or VIH
12 mA
IOL
24 mA
24 mA
±1.0
µA
VI = VCC, GND
5.5
75
mA
VOLD = 1.65 V Max
5.5
–75
mA
VOHD = 3.85 V Min
* All outputs loaded; thresholds on input associated with output under test.
** Maximum test duration 2.0 ms, one output loaded at a time.
FACT DATA
5-3
MC74AC4020
AC CHARACTERISTICS (For Figures and Waveforms — See Section 3)
Symbol
Parameter
VCC*
(V)
74AC
74AC
TA = +25°C
CL = 50 pF
TA = –40°C
to +85°C
CL = 50 pF
Min
Typ
0
140
Max
Min
Unit
Max
fmax
Maximum Clock
Frequency
3.3
5.0
110
130
100
120
tPLH
Propagation Delay
CP to Q1
3.3
5.0
2.0
2.0
11
8.0
2.0
2.0
14
10
ns
tPHL
Propagation Delay
CP to Q1
3.3
5.0
2.0
2.0
11
8.0
2.0
2.0
14
10
ns
tPLH
Propagation Delay
CP to Q4
3.3
5.0
2.0
2.0
18
13
2.0
2.0
21
16
ns
tPHL
Propagation Delay
CP to Q4
3.3
5.0
2.0
2.0
18
13
2.0
2.0
21
16
ns
tPHL
Propagation Delay
Reset to any Q
3.3
5.0
3.0
3.0
12
10
3.0
3.0
15
12
ns
tPHL
Propagation Delay
On to Qn +1
3.3
5.0
0
0
5.5
3.5
0
0
6.5
4.5
ns
tPHL
Propagation Delay
On to Qn +1
3.3
5.0
0
0
5.5
3.5
0
0
6.5
4.5
ns
trec
MR to CP
Recovery Time
3.3
5.0
0
0
–2.5
–1.5
0
0
ns
tw CP
Minimum Pulse Width
Clock Pin
3.3
5.0
4.0
3.0
3.5
2.5
4.5
3.5
ns
tw MR
Minimum Pulse Width
Master Reset
3.3
5.0
4.0
3.0
3.5
2.5
4.5
3.5
ns
MHz
* Voltage Range 3.3 V is 3.3 V ±0.3 V.
Voltage Range 5.0 V is 5.0 V ±0.5 V.
CAPACITANCE
Symbol
Parameter
Value
Typ
Unit
Test Conditions
CIN
Input Capacitance
4.5
pF
VCC = 5.0 V
CPD
Power Dissipation Capacitance
50
pF
VCC = 5.0 V
FACT DATA
5-4
Fig.
No.
MC74AC4020
OUTLINE DIMENSIONS
N SUFFIX
PLASTIC DIP PACKAGE
CASE 648–08
ISSUE R
–A–
16
9
1
8
NOTES:
1. DIMENSIONING AND TOLERANCING PER ANSI
Y14.5M, 1982.
2. CONTROLLING DIMENSION: INCH.
3. DIMENSION L TO CENTER OF LEADS WHEN
FORMED PARALLEL.
4. DIMENSION B DOES NOT INCLUDE MOLD FLASH.
5. ROUNDED CORNERS OPTIONAL.
B
F
C
DIM
A
B
C
D
F
G
H
J
K
L
M
S
L
S
SEATING
PLANE
–T–
K
H
G
D
M
J
16 PL
0.25 (0.010)
T A
M
M
D SUFFIX
PLASTIC SOIC PACKAGE
CASE 751B–05
ISSUE J
–A–
16
1
P
8 PL
0.25 (0.010)
8
M
B
S
G
R
K
F
X 45 _
C
–T–
SEATING
PLANE
J
M
D
16 PL
0.25 (0.010)
M
T B
S
A
S
MILLIMETERS
MIN
MAX
18.80
19.55
6.35
6.85
3.69
4.44
0.39
0.53
1.02
1.77
2.54 BSC
1.27 BSC
0.21
0.38
2.80
3.30
7.50
7.74
0_
10 _
0.51
1.01
NOTES:
1. DIMENSIONING AND TOLERANCING PER
ANSI Y14.5M, 1982.
2. CONTROLLING DIMENSION: MILLIMETER.
3. DIMENSIONS A AND B DO NOT INCLUDE
MOLD PROTRUSION.
4. MAXIMUM MOLD PROTRUSION 0.15 (0.006)
PER SIDE.
5. DIMENSION D DOES NOT INCLUDE DAMBAR
PROTRUSION. ALLOWABLE DAMBAR
PROTRUSION SHALL BE 0.127 (0.005) TOTAL
IN EXCESS OF THE D DIMENSION AT
MAXIMUM MATERIAL CONDITION.
9
–B–
INCHES
MIN
MAX
0.740
0.770
0.250
0.270
0.145
0.175
0.015
0.021
0.040
0.70
0.100 BSC
0.050 BSC
0.008
0.015
0.110
0.130
0.295
0.305
0_
10 _
0.020
0.040
DIM
A
B
C
D
F
G
J
K
M
P
R
MILLIMETERS
MIN
MAX
9.80
10.00
3.80
4.00
1.35
1.75
0.35
0.49
0.40
1.25
1.27 BSC
0.19
0.25
0.10
0.25
0_
7_
5.80
6.20
0.25
0.50
INCHES
MIN
MAX
0.386
0.393
0.150
0.157
0.054
0.068
0.014
0.019
0.016
0.049
0.050 BSC
0.008
0.009
0.004
0.009
0_
7_
0.229
0.244
0.010
0.019
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the suitability of its products for any particular purpose, nor does Motorola assume any liability arising out of the application or use of any product or circuit, and
specifically disclaims any and all liability, including without limitation consequential or incidental damages. “Typical” parameters can and do vary in different
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How to reach us:
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P.O. Box 20912; Phoenix, Arizona 85036. 1–800–441–2447
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51 Ting Kok Road, Tai Po, N.T., Hong Kong. 852–26629298
◊
FACT DATA
5-5
*MC74AC4020/D*
MC74AC4020/D