1/11
April 2001
s
HIGH SPEED:
f
MAX
= 250MHz (TYP.) at V
CC
= 5V
s
LOW POWER DISSIPATION:
I
CC
= 4
A(MAX.) at T
A
=25C
s
HIGH NOISE IMMUNITY:
V
NIH
= V
NIL
= 28 % V
CC
(MIN.)
s
50
TRANSMISSION LINE DRIVING
CAPABILITY
s
SYMMETRICAL OUTPUT IMPEDANCE:
|I
OH
| = I
OL
= 24mA (MIN)
s
BALANCED PROPAGATION DELAYS:
t
PLH
t
PHL
s
OPERATING VOLTAGE RANGE:
V
CC
(OPR) = 2V to 6V
s
PIN AND FUNCTION COMPATIBLE WITH
74 SERIES 174
s
IMPROVED LATCH-UP IMMUNITY
DESCRIPTION
The 74AC174 is an advanced high-speed CMOS
HEX D-TYPE FLIP FLOP WITH CLEAR
fabricated with sub-micron silicon gate and
double-layer metal wiring C
2
MOS tecnology.
Information signals applied to D inputs are
transferred to the Q output on the positive going
edge of the clock pulse.
When the CLEAR input is held low, the Q outputs
are held low independentely of the other inputs.
All inputs and outputs are equipped with
protection circuits against static discharge, giving
them 2KV ESD immunity and transient excess
voltage.
74AC174
HEX D-TYPE FLIP FLOP WITH CLEAR
PIN CONNECTION AND IEC LOGIC SYMBOLS
ORDER CODES
PACKAGE
TUBE
T & R
DIP
74AC174B
SOP
74AC174M
74AC174MTR
TSSOP
74AC174TTR
TSSOP
DIP
SOP
74AC174
2/11
INPUT AND OUTPUT EQUIVALENT CIRCUIT
PIN DESCRIPTION
TRUTH TABLE
X : Don't Care
LOGIC DIAGRAM
This logic diagram has not to be used to estimate propagation delays
PIN No
SYMBOL
NAME AND FUNCTION
1
CLEAR
Asynchronous Master
Reset (Active LOW)
2, 5, 7, 10,
12, 15
Q0 to Q5
Flip-Flop Outputs
3, 4, 6, 11,
13, 14
D0 to D5
Data Inputs
9
CLOCK
Clock Input (LOW-to-HIGH,
Edge Trigger)
8
GND
Ground (0V)
16
V
CC
Positive Supply Voltage
INPUTS
OUTPUT
FUNCTION
CLEAR
D
CLOCK
Q
L
X
X
L
CLEAR
H
L
L
H
H
H
H
X
Q
n
NO CHANGE
74AC174
3/11
ABSOLUTE MAXIMUM RATINGS
Absolute Maximum Ratings are those values beyond which damage to the device may occur. Functional operation under these conditions is
not implied.
RECOMMENDED OPERATING CONDITIONS
1) V
IN
from 30% to 70% of V
CC
Symbol
Parameter
Value
Unit
V
CC
Supply Voltage
-0.5 to +7
V
V
I
DC Input Voltage
-0.5 to V
CC
+ 0.5
V
V
O
DC Output Voltage
-0.5 to V
CC
+ 0.5
V
I
IK
DC Input Diode Current
20
mA
I
OK
DC Output Diode Current
20
mA
I
O
DC Output Current
50
mA
I
CC
or I
GND
DC V
CC
or Ground Current
300
mA
T
stg
Storage Temperature
-65 to +150
C
T
L
Lead Temperature (10 sec)
300
C
Symbol
Parameter
Value
Unit
V
CC
Supply Voltage
2 to 6
V
V
I
Input Voltage
0 to V
CC
V
V
O
Output Voltage
0 to V
CC
V
T
op
Operating Temperature
-55 to 125
C
dt/dv
Input Rise and Fall Time V
CC
= 3.0, 4.5 or 5.5V (note 1)
8
ns/V
74AC174
4/11
DC SPECIFICATIONS
1) Maximum test duration 2ms, one output loaded at time
2) Incident wave switching is guaranteed on transmission lines with impedances as low as 50
Symbol
Parameter
Test Condition
Value
Unit
V
CC
(V)
T
A
= 25C
-40 to 85C
-55 to 125C
Min.
Typ.
Max.
Min.
Max.
Min.
Max.
V
IH
High Level Input
Voltage
3.0
V
O
= 0.1 V or
V
CC
-0.1V
2.1
1.5
2.1
2.1
V
4.5
3.15
2.25
3.15
3.15
5.5
3.85
2.75
3.85
3.85
V
IL
Low Level Input
Voltage
3.0
V
O
= 0.1 V or
V
CC
-0.1V
1.5
0.9
0.9
0.9
V
4.5
2.25
1.35
1.35
1.35
5.5
2.75
1.65
1.65
1.65
V
OH
High Level Output
Voltage
3.0
I
O
=-50
A
2.9
2.99
2.9
2.9
V
4.5
I
O
=-50
A
4.4
4.49
4.4
4.4
5.5
I
O
=-50
A
5.4
5.49
5.4
5.4
3.0
I
O
=-12 mA
2.56
2.46
2.4
4.5
I
O
=-24 mA
3.86
3.76
3.7
5.5
I
O
=-24 mA
4.86
4.76
4.7
V
OL
Low Level Output
Voltage
3.0
I
O
=50
A
0.002
0.1
0.1
0.1
V
4.5
I
O
=50
A
0.001
0.1
0.1
0.1
5.5
I
O
=50
A
0.001
0.1
0.1
0.1
3.0
I
O
=12 mA
0.36
0.44
0.5
4.5
I
O
=24 mA
0.36
0.44
0.5
5.5
I
O
=24 mA
0.36
0.44
0.5
I
I
Input Leakage
Current
5.5
V
I
= V
CC
or GND
0.1
1
1
A
I
CC
Quiescent Supply
Current
5.5
V
I
= V
CC
or GND
4
40
80
A
I
OLD
Dynamic Output
Current (note 1, 2)
5.5
V
OLD
= 1.65 V max
75
50
mA
I
OHD
V
OHD
= 3.85 V min
-75
-50
mA
74AC174
5/11
AC ELECTRICAL CHARACTERISTICS (C
L
= 50 pF, R
L
= 500
, Input t
r
= t
f
= 3ns)
(*) Voltage range is 3.3V
0.3V
(**) Voltage range is 5.0V
0.5V
CAPACITIVE CHARACTERISTICS
1) C
PD
is defined as the value of the IC's internal equivalent capacitance which is calculated from the operating current consumption without
load. (Refer to Test Circuit). Average operating current can be obtained by the following equation. I
CC(opr)
= C
PD
x V
CC
x f
IN
+ I
CC
/6 (per circuit)
Symbol
Parameter
Test Condition
Value
Unit
V
CC
(V)
T
A
= 25C
-40 to 85C
-55 to 125C
Min.
Typ.
Max.
Min.
Max.
Min.
Max.
t
PLH
t
PHL
Propagation Delay
Time
CLOCK to Y
3.3
(*)
1.5
8.5
11.0
12.5
14.0
ns
5.0
(**)
1.5
6.0
8.0
9.5
10.5
t
PHL
Propagation Delay
Time
CLEAR to Y
3.3
(*)
1.5
9.0
11.5
12.5
13.5
ns
5.0
(**)
1.5
7.0
9.0
10.5
11.0
t
WL
CLEAR Pulse
Width, LOW
3.3
(*)
1.0
5.5
7.0
7.0
ns
5.0
(**)
1.0
5.0
5.0
5.0
t
W
CLOCK Pulse
Width
3.3
(*)
1.0
5.5
7.0
7.0
ns
5.0
(**)
1.0
5.0
5.0
5.0
t
s
Setup Time D to
CLOCK, HIGH or
LOW
3.3
(*)
2.5
6.5
7.0
7.0
ns
5.0
(**)
2.0
5.0
5.5
5.5
t
h
Hold Time D to
CLOCK, HIGH or
LOW
3.3
(*)
1.0
3.0
3.0
3.0
ns
5.0
(**)
0.5
3.0
3.0
3.0
t
REM
Recovery Time
CLEAR to CK
3.3
(*)
0
2.5
2.5
2.5
ns
5.0
(**)
0
2.0
2.0
2.0
f
MAX
Maximum Clock
Frequency
3.3
(*)
90
200
70
70
MHz
5.0
(**)
100
250
100
100
Symbol
Parameter
Test Condition
Value
Unit
V
CC
(V)
T
A
= 25C
-40 to 85C
-55 to 125C
Min.
Typ.
Max.
Min.
Max.
Min.
Max.
C
IN
Input Capacitance
5.0
4.5
pF
C
PD
Power Dissipation
Capacitance
(note1)
5.0
f
IN
= 10MHz
33
pF
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