5-1
FACT DATA
The MC74AC174/74ACT174 is a high-speed hex D flip-flop. The device is
used primarily as a 6-bit edge-triggered storage register. The information on the
D inputs is transferred to storage during the LOW-to-HIGH clock transition. The
device has a Master Reset to simultaneously clear all flip-flops.
•Outputs Source/Sink 24 mA
• ′ACT174 Has TTL Compatible Inputs
1516 14 13 12 11 10
21 3 4 5 6 7
VCC 9
8
Q5D5D4Q4D3Q3CP
MR Q0D0D1Q1D2Q2GND
PIN NAMES
D0–D5Data Inputs
CP Clock Pulse Input
MR Master Reset Input
Q0–Q5Outputs
TRUTH TABLE
Inputs Output
MR CP D Q
L X X L
H H H
H L L
H L X Q
H = HIGH Voltage Level
L = LOW Voltage Level
X = Immaterial
= LOW-to-HIGH Transition of Clock
HEX D FLIP-FLOP
WITH MASTER RESET
N SUFFIX
CASE 648-08
PLASTIC
D SUFFIX
CASE 751B-05
PLASTIC
LOGIC SYMBOL
CP
MR Q2Q3Q4Q5
D0D1D2D3D4D5
Q1
Q0
MC74AC174 MC74ACT174
5-2
FACT DATA
FUNCTIONAL DESCRIPTION
The MC74AC174/74ACT174 consists of six edge-triggered D
flip-flops with individual D inputs and Q outputs. The Clock
(CP) and Master Reset (MR) are common to all flip-flops. Each
D input’s state is transferred to the corresponding flip-flop’s
output following the LOW-to-HIGH Clock (CP) transition. A
LOW input to the Master Reset (MR) will force all outputs LOW
independent of Clock or Data inputs. The MC74AC174/
74ACT174 is useful for applications where the true output only
is required and the Clock and Master Reset are common to all
storage elements.
LOGIC DIAGRAM
CPMR
Q5
D5
Q
CD
Please note that this diagram is provided only for the understanding of logic
operations and should not be used to estimate propagation delays.
CP
D
Q4
D4
Q
CD
CP
D
Q3
D3
Q
CD
CP
D
Q2
D2
Q
CD
CP
D
Q1
D1
Q
CD
CP
D
Q0
D0
Q
CD
CP
D
MAXIMUM RATINGS*
Symbol Parameter Value Unit
VCC DC Supply Voltage (Referenced to GND) –0.5 to +7.0 V
Vin DC Input Voltage (Referenced to GND) –0.5 to VCC +0.5 V
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 Sink/Source Current, per Pin ±50 mA
ICC DC VCC or GND Current per Output Pin ±50 mA
Tstg Storage Temperature –65 to +150 °C
* Maximum Ratings are those values beyond which damage to the device may occur. Functional operation should be restricted to the Recommended
Operating Conditions.
MC74AC174 MC74ACT174
5-3
FACT DATA
RECOMMENDED OPERATING CONDITIONS
Symbol Parameter Min Typ Max Unit
VCC
Supply Voltage
′AC 2.0 5.0 6.0
V
VCC
Supply Voltage
′ACT 4.5 5.0 5.5
V
Vin, Vout DC Input Voltage, Output Voltage (Ref. to GND) 0 VCC V
tr, tf
Input Rise and Fall Time (Note 1)
′AC Devices except Schmitt Inputs
VCC @ 3.0 V 150
tr, tf
Input Rise and Fall Time (Note 1)
′AC Devices except Schmitt Inputs
VCC @ 4.5 V 40 ns/V
r, tf
′AC Devices except Schmitt Inputs
VCC @ 5.5 V 25
tr, tf
Input Rise and Fall Time (Note 2)
′ACT Devices except Schmitt Inputs
VCC @ 4.5 V 10
ns/V
tr, tf
Input Rise and Fall Time (Note 2)
′ACT Devices except Schmitt Inputs
VCC @ 5.5 V 8.0
ns/V
TJJunction Temperature (PDIP) 140 °C
TAOperating Ambient Temperature Range –40 25 85 °C
IOH Output Current — High –24 mA
IOL Output Current — Low 24 mA
1. Vin from 30% to 70% VCC; see individual Data Sheets for devices that differ from the typical input rise and fall times.
2. Vin from 0.8 V to 2.0 V ; see individual Data Sheets for devices that dif fer from the typical input rise and fall times.
DC CHARACTERISTICS
Symbol
Parameter
VCC
(V)
74AC 74AC
Unit
Conditions
Symbol
Parameter
VCC
(V)
TA = +25°CTA =
–40°C to +85°C
Unit
Conditions
Typ Guaranteed Limits
VIH
Minimum High Level
Input Voltage
3.0 1.5 2.1 2.1 VOUT = 0.1 V
Input Voltage
4.5 2.25 3.15 3.15 V or VCC – 0.1 V
5.5 2.75 3.85 3.85
VIL
Maximum Low Level
Input Voltage
3.0 1.5 0.9 0.9 VOUT = 0.1 V
Input Voltage
4.5 2.25 1.35 1.35 V or VCC – 0.1 V
5.5 2.75 1.65 1.65
VOH
Minimum High Level
Output Voltage
3.0 2.99 2.9 2.9 IOUT = –50 µA
Output Voltage
4.5 4.49 4.4 4.4 V
5.5 5.49 5.4 5.4
V
*VIN = VIL or VIH
3.0 2.56 2.46
V
–12 mA
4.5 3.86 3.76
V
IOH –24 mA
5.5 4.86 4.76 –24 mA
VOL
Maximum Low Level
Output Voltage
3.0 0.002 0.1 0.1 IOUT = 50 µA
Output Voltage
4.5 0.001 0.1 0.1 V
5.5 0.001 0.1 0.1
V
*VIN = VIL or VIH
3.0 0.36 0.44
V
12 mA
4.5 0.36 0.44
V
IOL 24 mA
5.5 0.36 0.44 24 mA
IIN
Maximum Input
Leakage Current
5.5
±0.1
±1.0
µA
VI = VCC, GND
Leakage Current
5.5
±0.1
±1.0
µA
VI = VCC, GND
IOLD
†Minimum Dynamic
Output Current
5.5 75 mA VOLD = 1.65 V Max
IOHD
Output Current
5.5 –75 mA VOHD = 3.85 V Min
ICC
Maximum Quiescent
Supply Current
5.5
8.0
80
µA
VIN = VCC or GND
Supply Current
5.5
8.0
80
µA
VIN = VCC or GND
* All outputs loaded; thresholds on input associated with output under test.
†Maximum test duration 2.0 ms, one output loaded at a time.
Note: IIN and ICC @ 3.0 V are guaranteed to be less than or equal to the respective limit @ 5.5 V VCC.
MC74AC174 MC74ACT174
5-4
FACT DATA
AC CHARACTERISTICS (For Figures and Waveforms — See Section 3)
Symbol
Parameter
VCC*
(V)
74AC 74AC
Unit
Fig.
No.
Symbol
Parameter
VCC*
(V)
TA = +25°C
CL = 50 pF
TA = –40°C
to +85°C
CL = 50 pF
Unit
Fig.
No.
Min Typ Max Min Max
fmax
Maximum Clock 3.3 90 100 70
MHz
3-3
fmax
Frequency 5.0 100 125 100
MHz
3-3
tPLH
Propagation Delay 3.3 2.0 9.0 11.5 1.5 12.5
ns
3-6
tPLH
CP to Qn5.0 1.5 6.0 8.5 1.0 9.5
ns
3-6
tPHL
Propagation Delay 3.3 2.0 8.5 11.0 1.5 12.0
ns
3-6
tPHL
CP to Qn5.0 1.5 6.0 8.0 1.0 9.0
ns
3-6
tPHL
Propagation Delay 3.3 2.5 9.0 11.5 2.0 12.5
ns
3-6
tPHL
MR to Qn5.0 1.5 7.0 9.0 1.5 10.5
ns
3-6
* Voltage Range 3.3 V is 3.3 V ±0.3 V.
Voltage Range 5.0 V is 5.0 V ±0.5 V.
AC OPERATING REQUIREMENTS
Symbol
Parameter
VCC*
(V)
74AC 74AC
Unit
Fig.
No.
Symbol
Parameter
VCC*
(V)
TA = +25°C
CL = 50 pF
TA = –40°C
to +85°C
CL = 50 pF
Unit
Fig.
No.
Typ Guaranteed Minimum
ts
Setup Time, HIGH or LOW 3.3 2.5 6.5 7.0
ns
3-9
ts
Dn to CP 5.0 2.0 5.0 5.5
ns
3-9
th
Hold Time, HIGH or LOW 3.3 1.0 3.0 3.0
ns
3-9
th
Dn to CP 5.0 0.5 3.0 3.0
ns
3-9
tw
MR Pulse Width, LOW
3.3 1.0 5.5 7.0
ns
3-6
tw
MR Pulse Width, LOW
5.0 1.0 5.0 5.0
ns
3-6
tw
CP Pulse Width
3.3 1.0 5.5 7.0
ns
3-6
tw
CP Pulse Width
5.0 1.0 5.0 5.0
ns
3-6
trec
Recovery TIme 3.3 0 2.5 2.5
ns
3-6
trec
MR to CP 5.0 0 2.0 2.0
ns
3-6
* Voltage Range 3.3 V is 3.3 V ±0.3 V.
Voltage Range 5.0 V is 5.0 V ±0.5 V.
MC74AC174 MC74ACT174
5-5
FACT DATA
DC CHARACTERISTICS
Symbol
Parameter
VCC
(V)
74ACT 74ACT
Unit
Conditions
Symbol
Parameter
VCC
(V)
TA = +25°CTA =
–40°C to +85°C
Unit
Conditions
Typ Guaranteed Limits
VIH
Minimum High Level
Input Voltage
4.5 1.5 2.0 2.0
V
VOUT = 0.1 V
Input Voltage
5.5 1.5 2.0 2.0
V
or VCC – 0.1 V
VIL
Maximum Low Level
Input Voltage
4.5 1.5 0.8 0.8
V
VOUT = 0.1 V
Input Voltage
5.5 1.5 0.8 0.8
V
or VCC – 0.1 V
VOH
Minimum High Level
Output Voltage
4.5 4.49 4.4 4.4
V
IOUT = –50 µA
Output Voltage
5.5 5.49 5.4 5.4
V
*VIN = VIL or VIH
4.5 3.86 3.76 V
IOH
–24 mA
5.5 4.86 4.76
IOH
–24 mA
VOL
Maximum Low Level
Output Voltage
4.5 0.001 0.1 0.1
V
IOUT = 50 µA
Output Voltage
5.5 0.001 0.1 0.1
V
*VIN = VIL or VIH
4.5 0.36 0.44 V
IOL
24 mA
5.5 0.36 0.44
IOL
24 mA
IIN
Maximum Input
Leakage Current
5.5
±0.1
±1.0
µA
VI = VCC, GND
Leakage Current
5.5
±0.1
±1.0
µA
VI = VCC, GND
∆ICCT Additional Max. ICC/Input 5.5 0.6 1.5 mA VI = VCC – 2.1 V
IOLD
†Minimum Dynamic
Output Current
5.5 75 mA VOLD = 1.65 V Max
IOHD
Output Current
5.5 –75 mA VOHD = 3.85 V Min
ICC
Maximum Quiescent
Supply Current
5.5
8.0
80
µA
VIN = VCC or GND
Supply Current
5.5
8.0
80
µA
VIN = VCC or GND
* All outputs loaded; thresholds on input associated with output under test.
†Maximum test duration 2.0 ms, one output loaded at a time.
AC CHARACTERISTICS (For Figures and Waveforms — See Section 3)
Symbol
Parameter
VCC*
(V)
74ACT 74ACT
Unit
Fig.
No.
Symbol
Parameter
VCC*
(V)
TA = +25°C
CL = 50 pF
TA = –40°C
to +85°C
CL = 50 pF
Unit
Fig.
No.
Min Typ Max Min Max
fmax
Maximum Clock
Frequency
5.0
165
140
MHz
3-3
fmax
Frequency
5.0
165
140
MHz
3-3
tPLH
Propagation Delay
CP to Qn
5.0
1.5
10.5
1.5
11.5
ns
3-6
tPLH
CP to Qn
5.0
1.5
10.5
1.5
11.5
ns
3-6
tPHL
Propagation Delay
CP to Qn
5.0
1.5
10.5
1.5
11.5
ns
3-6
tPHL
CP to Qn
5.0
1.5
10.5
1.5
11.5
ns
3-6
tPHL
Propagation Delay
MR to Qn
5.0
1.5
9.5
1.5
11.0
ns
3-6
tPHL
MR
to Qn
5.0
1.5
9.5
1.5
11.0
ns
3-6
* Voltage Range 5.0 V is 5.0 V ±0.5 V.
MC74AC174 MC74ACT174
5-6
FACT DATA
AC OPERATING REQUIREMENTS
Symbol
Parameter
VCC*
(V)
74ACT 74ACT
Unit
Fig.
No.
Symbol
Parameter
VCC*
(V)
TA = +25°C
CL = 50 pF
TA = –40°C
to +85°C
CL = 50 pF
Unit
Fig.
No.
Typ Guaranteed Minimum
ts
Setup Time, HIGH or LOW
Dn to CP
5.0
1.5
1.5
ns
3-9
ts
Dn to CP
5.0
1.5
1.5
ns
3-9
th
Hold Time, HIGH or LOW
Dn to CP
5.0
2.0
2.0
ns
3-9
th
Dn to CP
5.0
2.0
2.0
ns
3-9
tw
MR Pulse Width, LOW
5.0
3.0
3.5
ns
3-6
tw
MR Pulse Width, LOW
5.0
3.0
3.5
ns
3-6
tw
CP Pulse Width
HIGH or LOW
5.0
3.0
3.5
ns
3-6
tw
HIGH or LOW
5.0
3.0
3.5
ns
3-6
trec
Recovery Time
MR to CP
5.0
0.5
0.5
ns
3-6
trec
MR
to CP
5.0
0.5
0.5
ns
3-6
* 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 85 pF VCC = 5.0 V
MC74AC174 MC74ACT174
5-7
FACT DATA
OUTLINE DIMENSIONS
N SUFFIX
PLASTIC DIP PACKAGE
CASE 648–08
ISSUE R
D SUFFIX
PLASTIC SOIC PACKAGE
CASE 751B–05
ISSUE J
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.
1 8
16 9
SEATING
PLANE
F
J
M
RX 45
_
G
8 PLP
–B–
–A–
M
0.25 (0.010) B S
–T–
D
K
C
16 PL
S
B
M
0.25 (0.010) A S
T
DIM MIN MAX MIN MAX
INCHESMILLIMETERS
A9.80 10.00 0.386 0.393
B3.80 4.00 0.150 0.157
C1.35 1.75 0.054 0.068
D0.35 0.49 0.014 0.019
F0.40 1.25 0.016 0.049
G1.27 BSC 0.050 BSC
J0.19 0.25 0.008 0.009
K0.10 0.25 0.004 0.009
M0 7 0 7
P5.80 6.20 0.229 0.244
R0.25 0.50 0.010 0.019
____
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.
–A–
B
FC
S
HGD
J
L
M
16 PL
SEATING
1 8
916
K
PLANE
–T–
M
A
M
0.25 (0.010) T
DIM MIN MAX MIN MAX
MILLIMETERSINCHES
A0.740 0.770 18.80 19.55
B0.250 0.270 6.35 6.85
C0.145 0.175 3.69 4.44
D0.015 0.021 0.39 0.53
F0.040 0.70 1.02 1.77
G0.100 BSC 2.54 BSC
H0.050 BSC 1.27 BSC
J0.008 0.015 0.21 0.38
K0.110 0.130 2.80 3.30
L0.295 0.305 7.50 7.74
M0 10 0 10
S0.020 0.040 0.51 1.01
____
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MC74AC174/D
*MC74AC174/D*
◊
