UNISONIC TECHNOLOGIES CO., LTD
U74AHC374
OCTAL EDGE-TRIGGERED
D-TYPE FLIP-FLOPS WITH
3-STATE OUTPUTS
DESCRIPTION
The
U74AHC374
is a octal edge-triggered D-type flip-flops with
3-state outputs and it has 8 channels.
When the
OE
input is low, on the positive transition of the clock
(CLK) input, the Q outputs are set to the logic levels of the data (D)
inputs.
When the
OE
input is high, the outputs are in the
high-impedance.
To ensure the high-impedance state during power up or power
down,
OE
should be tied to V
CC
through a pull-up resistor; the
minimum value of the resistor is determined by the current-sinking
capability of the driver.
CMOS IC
TSSOP-20
FEATURES
* Operate from 2V to 5.5V
* Max t
PD
of 12.7ns at V
CC
=3.3V, C
L
=15pF
* Max I
CC
of 4uA
* Typ V
OL
< 0.36V at V
CC
=4.5V,I
O
=8mA,T
A
=25°C
* Typ V
OH
> 3.94V at V
CC
=4.5V,I
O
=-8mA, T
A
=25°C
ORDERING INFORMATION
Ordering Number
Lead Free
Halogen Free
U74HC374L-P20-R
U74HC374G-P20-R
U74HC374L-P20-T
U74HC374G-P20-T
Package
TSSOP-20
TSSOP-20
Packing
Tape Reel
Tube
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Copyright © 2011 Unisonic Technologies Co., Ltd
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QW-R502-647.A
U74AHC374
PIN CONFIGURATION
CMOS IC
FUNCTION TABLE
INPUTS(
OE
)
L
L
L
H
INPUTS(CLK)
↑
↑
H or L
X
INPUTS(D)
H
L
X
X
OUTPUT(Q)
H
L
Q0
Z
LOGIC SYMBOL
OE 1
CLK 11
1D 3
2D
3D
4D
4
7
8
EN
C1
1D
2 1Q
5 2Q
6 3Q
9 4Q
5D 13
6D 14
7D 17
8D 18
12 5Q
15 6Q
16 7Q
19 8Q
LOGIC DIAGRAM
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U74AHC374
ABSOLUTE MAXIMUM RATING
PARAMETER
CMOS IC
SYMBOL
RATINGS
UNIT
Supply Voltage
V
CC
-0.5 ~ 7
V
Input Voltage
V
IN
-0.5 ~ 7
V
Output Voltage
V
OUT
-0.5 ~ V
CC
+0.5
V
V
CC
or GND Current
I
CC
±75
mA
Output Current
I
OUT
±25
mA
Input Clamp Current
I
IK
-20
mA
Output Clamp Current
I
OK
±20
mA
Operating Temperature
T
OPR
-40 ~ + 85
℃
Storage Temperature
T
STG
-65 ~ + 150
℃
Note: Absolute maximum ratings are those values beyond which the device could be permanently damaged.
Absolute maximum ratings are stress ratings only and functional device operation is not implied.
RECOMMENDED OPERATING CONDITIONS
PARAMETER
Supply Voltage
High-level Input Voltage
SYMBOL
V
CC
V
IH
TEST CONDITIONS
V
CC
=2V
V
CC
=3V
V
CC
=5.5V
V
CC
=2V
V
CC
=3V
V
CC
=5.5V
High or low state
V
CC
= 2 V
V
CC
= 3.3 V ± 0.3 V
V
CC
= 5 V ± 0.5 V
V
CC
= 2 V
V
CC
= 3.3 V ± 0.3 V
V
CC
= 5 V ± 0.5 V
V
CC
= 3.3 V ± 0.3 V
V
CC
= 5 V ± 0.5 V
MIN
2
1.5
2.1
3.85
TYP
MAX
5.5
UNIT
V
V
0.5
0.9
1.65
V
CC
V
CC
-50
-4
-8
50
4
8
100
20
Low-level Input Voltage
Input Voltage
Output Voltage
High-level Output Current
V
IL
V
IN
V
OUT
I
OH
V
V
V
μA
mA
μA
mA
ns
0
0
Low-level Output Current
Input Rise or Fall Times
I
OL
t
R
, t
F
ELECTRICAL CHARACTERISTICS
(T
A
=25℃)
PARAMETER
SYMBOL
TEST CONDITIONS
V
CC
=2V, I
OH
=-50μA
V
CC
=3V, I
OH
=-50μA
V
CC
=4.5V, I
OH
=-50μA
V
CC
=3V, I
OH
=-4mA
V
CC
=4.5V, I
OH
=-8mA
V
CC
=2V, I
OH
=50μA
V
CC
=3V, I
OH
=50μA
V
CC
=4.5V, I
OH
=50μA
V
CC
=3V, I
OH
=4mA
V
CC
=4.5V, I
OH
=8mA
V
CC
= 0 to 5.5V,
V
IN
=5.5V or GND
V
CC
=5.5V,
V
OUT
=
V
CC
or GND
V
CC
=5.5V,
V
IN
=V
CC
or GND, I
OUT
=0
V
CC
=5V,
V
IN
=V
CC
or GND
V
CC
=5V,
V
OUT
=V
CC
or GND
MIN
1.9
2.9
4.4
2.58
3.94
TYP
2
3
4.5
MAX
UNIT
Output Voltage High-Level
V
OH
V
Output Voltage Low-Level
V
OL
Input Leakage Current
3-state Leakage Current
Quiescent Supply Current
Input Capacitance
Output Capacitance
I
I(LEAK)
I
OZ
I
CC
C
I
C
O
4
6
0.1
0.1
0.1
0.36
0.36
±0.1
±0.25
4
10
V
μA
μA
μA
pF
pF
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U74AHC374
SWITCHING CHARACTERISTICS
(See TEST CIRCUIT AND WAVEFORMS)
PARAMETER
From CLK to Q
SYMBOL
t
PLH
/t
PHL
TEST CONDITIONS
C
L
=15pF
V
CC
= 3.3V ± 0.3V
C
L
=50pF
C
L
=15pF
V
CC
= 5V ± 0.5V
C
L
=50pF
C
L
=15pF
V
CC
= 3.3V ± 0.3V
C
L
=50pF
C
L
=15pF
V
CC
= 5V ± 0.5V
C
L
=50pF
C
L
=15pF
V
CC
= 3.3V ± 0.3V
C
L
=50pF
C
L
=15pF
V
CC
= 5V ± 0.5V
C
L
=50pF
C
L
=15pF
V
CC
= 3.3V ± 0.3V
C
L
=50pF
C
L
=15pF
V
CC
= 5V ± 0.5V
C
L
=50pF
V
CC
= 3.3 V ± 0.3 V
V
CC
= 5 V ± 0.5 V
V
CC
= 3.3 V ± 0.3 V
V
CC
= 5 V ± 0.5 V
V
CC
= 3.3 V ± 0.3 V
V
CC
= 5 V ± 0.5 V
MIN
TYP
8.1
10.6
5.4
6.9
7.1
9.6
5.1
6.6
7.5
10.2
4.6
6.1
130
85
185
120
CMOS IC
From
OE
to Q
t
PZL
/t
PZH
From
OE
to Q
t
PLZ
/t
PHZ
MAX
12.7
16.2
8.1
10.1
11
14.5
7.6
9.6
10.5
14
6.8
8.8
UNIT
ns
ns
ns
Maximum Clock Frequency
f
MAX
Pulse Width
Setup Time
Hold Time
t
W
t
SU
t
H
80
55
130
85
5
5
4.5
3
2
2
MHz
ns
ns
ns
OPERATING CHARACTERISTICS
(T
A
=25°С)
PARAMETER
Power Dissipation Capacitance
SYMBOL
TEST CONDITIONS
C
PD
No load, V
CC
= 5 V,
f=1MHz
RATINGS
32
UNIT
pF
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QW-R502-647.A
U74AHC374
TEST CIRCUIT AND WAVEFORMS
CMOS IC
TEST
t
PLH
/t
PHL
t
PLZ
/t
PZL
t
PHZ
/t
PZH
S1
Open
V
LOAD
GND
V
CC
3.3V±0.3V
5V±0.5V
Input
V
IN
V
CC
V
CC
t
R
, t
F
≤3ns
≤3ns
V
M
V
CC
/2
V
CC
/2
V
LOAD
V
CC
V
CC
C
L
15pF
50pF
15pF
50pF
R
L
1kΩ
1kΩ
V
Δ
0.3V
0.5V
t
W
V
IN
Input
V
M
V
M
0
V
Pulse Duration
Timing Input
t
SU
V
M
t
H
V
IN
Data Input
V
M
V
M
0V
Setup and Hold Times
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Embedded System
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