UNISONIC TECHNOLOGIES CO., LTD
U74AHCT374
OCTAL EDGE-TRIGGERED
D-TYPE FLIP-FLOPS WITH
3-STATE OUTPUTS
DESCRIPTION
The
U74AHCT374
is a octal edge-triggered D-type flip-flops
with 3-state outputs and 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
* Inputs are TTL-Voltage Compatible
* Operate from 4.5V to 5.5V
* Inputs Accept Voltages to 5.5V
* Max t
PD
of 9.4ns at V
CC
=5V, C
L
=15pF
* Typical V
OL
< 0.36V at V
CC
=4.5V, I
OL
=8mA, T
A
=25°C
* Typical V
OH
> 3.94V at V
CC
=4.5V, I
OH
=-8mA, T
A
=25°C
ORDERING INFORMATION
Ordering Number
Lead Free
Halogen Free
U74AHCT374L-P20-R
U74AHCT374G-P20-R
U74AHCT374L-P20-T
U74AHCT374G-P20-T
Package
TSSOP-20
TSSOP-20
Packing
Tape Reel
Tube
www.unisonic.com.tw
Copyright © 2011 Unisonic Technologies Co., Ltd
1 of 6
QW+R502-690.A
U74AHCT374
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
Q
0
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
UNISONIC TECHNOLOGIES CO., LTD
www.unisonic.com.tw
2 of 6
QW-R502-690.A
U74AHCT374
ABSOLUTE MAXIMUM RATING
PARAMETER
Supply Voltage
Input Voltage
Output
Voltage
CMOS IC
SYMBOL
RATINGS
UNIT
V
CC
-0.5 ~ 7
V
V
IN
-0.5 ~ 7
V
V
OUT
-0.5 ~ V
CC
+0.5
V
V
CC
or GND Current
I
CC
±70
mA
Output Current
I
OUT
±35
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
Low-level Input Voltage
Input Voltage
Output Voltage
High-Level Output Current
Low-Level Output Current
Input Rise or Fall Times
Operating free-Air Temperature
SYMBOL
V
CC
V
IH
V
IL
V
IN
V
OUT
I
OH
I
OL
t
R
, t
F
T
A
MIN
4.5
2
0
0
TYP
MAX
5.5
0.8
5.5
V
CC
-8
8
20
85
UNIT
V
V
V
V
V
mA
mA
ns/V
℃
-40
ELECTRICAL CHARACTERISTICS
PARAMETER
Output Voltage High-Level
Output Voltage Low-Level
Input Leakage Current
Leakage Current (For Output in
High-Impedance State)
Quiescent Supply Current
Additional Quiescent Supply
Current
Input Capacitance
Output Capacitance
SYMBOL
V
OH
V
OL
I
I(LEAK)
I
OZ
I
CC
ΔI
CC
C
I
C
O
TEST CONDITIONS
V
CC
=4.5V, I
OH
=-50μA
V
CC
=4.5V, I
OH
=-8mA
V
CC
=4.5V, I
OL
=50μA
V
CC
=4.5V, I
OL
=8mA
V
CC
=0V to 5.5V,
V
IN
=0 or 5.5V
V
CC
=5.5V,V
IN
=V
IH
or V
IH
,V
OUT
=0 or 5.5V
V
CC
=5.5V,
V
IN
=V
CC
or GND, I
OUT
=0
V
CC
=5.5V, one input at 3.4V,
Other inputs at V
CC
or GND
V
CC
=5V,
V
IN
=V
CC
or GND
V
CC
=5V,
V
OUT
=V
CC
or GND
MIN
4.4
3.94
TYP
4.5
MAX
UNIT
V
0.1
0.36
±0.1
±0.25
4
1.35
4
9
10
V
μA
μA
μA
mA
pF
pF
UNISONIC TECHNOLOGIES CO., LTD
www.unisonic.com.tw
3 of 6
QW-R502-690.A
U74AHCT374
PARAMETER
From CLK to Q
From
OE
to Q
From
OE
to Q
Maximum Clock Frequency
Pulse Width
Setup Time
Hold Time
SYMBOL
t
PLH
/t
PHL
t
PZL
/t
PZH
t
PLZ
/t
PHZ
f
MAX
t
W
t
SU
t
H
TEST CONDITIONS
C
L
=15pF
V
CC
= 5 V ± 0.5 V
C
L
=50pF
C
L
=15pF
V
CC
= 5 V ± 0.5 V
C
L
=50pF
C
L
=15pF
V
CC
= 5 V ± 0.5 V
C
L
=50pF
C
L
=15pF
V
CC
= 5 V ± 0.5 V
C
L
=50pF
V
CC
= 5 V ± 0.5 V
V
CC
= 5 V ± 0.5 V
V
CC
= 5 V ± 0.5 V
MIN
TYP
5.6
6.4
6.5
7.3
6.2
7
90
85
6.5
2.5
2.5
CMOS IC
SWITCHING CHARACTERISTICS
(T
A
=25℃, See TEST CIRCUIT AND WAVEFORMS)
MAX
9.4
10.4
10.2
11.2
10.2
11.2
140
130
UNIT
ns
ns
ns
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
MIN
TYP
27
MAX
UNIT
pF
UNISONIC TECHNOLOGIES CO., LTD
www.unisonic.com.tw
4 of 6
QW-R502-690.A
U74AHCT374
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
5V±0.5V
Input
V
IN
V
CC
t
R
, t
F
≤3ns
V
M
V
CC
/2
V
LOAD
V
CC
C
L
15pF
50pF
R
L
1kΩ
V
Δ
0.5V
UNISONIC TECHNOLOGIES CO., LTD
www.unisonic.com.tw
5 of 6
QW-R502-690.A
京公网安备 11010802033920号
EEWORLD
