Datasheet

UNISONIC TECHNOLOGIES CO., LTD
U74AHCT374
CMOS IC
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.
TSSOP-20
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 VCC through a pull-up
resistor; the minimum value of the resistor is determined by the
current-sinking capability of the driver.
„
FEATURES
* Inputs are TTL-Voltage Compatible
* Operate from 4.5V to 5.5V
* Inputs Accept Voltages to 5.5V
* Max tPD of 9.4ns at VCC=5V, CL=15pF
* Typical VOL< 0.36V at VCC=4.5V, IOL=8mA, TA=25°C
* Typical VOH> 3.94V at VCC=4.5V, IOH=-8mA, TA=25°C
„
ORDERING INFORMATION
Ordering Number
Lead Free
Halogen Free
U74AHCT374L-P20-R
U74AHCT374G-P20-R
U74AHCT374L-P20-T
U74AHCT374G-P20-T
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Copyright © 2011 Unisonic Technologies Co., Ltd
Package
Packing
TSSOP-20
TSSOP-20
Tape Reel
Tube
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QW+R502-690.A
U74AHCT374
CMOS IC
„
PIN CONFIGURATION
„
FUNCTION TABLE
INPUTS( OE )
L
L
L
H
„
INPUTS(CLK)
↑
↑
H or L
X
OUTPUT(Q)
H
L
Q0
Z
LOGIC SYMBOL
OE 1
CLK 11
1D 3
2D
3D
4D
4
EN
C1
1D
7
8
5D 13
6D 14
7D 17
8D 18
„
INPUTS(D)
H
L
X
X
2 1Q
5 2Q
6 3Q
9 4Q
12 5Q
15 6Q
16 7Q
19 8Q
LOGIC DIAGRAM
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U74AHCT374
„
CMOS IC
ABSOLUTE MAXIMUM RATING
PARAMETER
Supply Voltage
Input Voltage
Output Voltage
SYMBOL
RATINGS
UNIT
VCC
-0.5 ~ 7
V
VIN
-0.5 ~ 7
V
VOUT
-0.5 ~ VCC +0.5
V
VCC or GND Current
ICC
±70
mA
Output Current
IOUT
±35
mA
Input Clamp Current
IIK
-20
mA
Output Clamp Current
IOK
±20
mA
Operating Temperature
TOPR
-40 ~ + 85
℃
Storage Temperature
TSTG
-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
VCC
VIH
VIL
VIN
VOUT
IOH
IOL
tR, tF
TA
MIN
4.5
2
TYP
MAX
5.5
UNIT
V
V
V
V
V
mA
mA
ns/V
℃
0.8
5.5
VCC
-8
8
20
85
0
0
-40
ELECTRICAL CHARACTERISTICS
PARAMETER
SYMBOL
Output Voltage High-Level
VOH
Output Voltage Low-Level
VOL
Input Leakage Current
Leakage Current (For Output in
High-Impedance State)
Quiescent Supply Current
Additional Quiescent Supply
Current
Input Capacitance
Output Capacitance
II(LEAK)
TEST CONDITIONS
VCC=4.5V, IOH=-50μA
VCC=4.5V, IOH=-8mA
VCC=4.5V, IOL=50μA
VCC=4.5V, IOL=8mA
VCC=0V to 5.5V, VIN=0 or 5.5V
IOZ
VCC=5.5V,VIN=VIH or VIH,VOUT=0 or 5.5V
ICC
VCC=5.5V, VIN=VCC or GND, IOUT=0
VCC=5.5V, one input at 3.4V,
Other inputs at VCC or GND
VCC=5V, VIN=VCC or GND
VCC=5V, VOUT=VCC or GND
ΔICC
CI
CO
UNISONIC TECHNOLOGIES CO., LTD
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MIN
4.4
3.94
TYP
4.5
4
9
MAX
UNIT
V
0.1
0.36
±0.1
μA
±0.25
μA
4
μA
1.35
mA
10
pF
pF
V
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CMOS IC
SWITCHING CHARACTERISTICS (TA =25℃, See TEST CIRCUIT AND WAVEFORMS)
PARAMETER
SYMBOL
From CLK to Q
tPLH/tPHL
From OE to Q
tPZL/tPZH
From OE to Q
tPLZ/tPHZ
Maximum Clock Frequency
fMAX
Pulse Width
Setup Time
Hold Time
tW
tSU
tH
„
TEST CONDITIONS
CL =15pF
VCC = 5 V ± 0.5 V
CL =50pF
CL =15pF
VCC = 5 V ± 0.5 V
CL =50pF
CL =15pF
VCC = 5 V ± 0.5 V
CL =50pF
CL =15pF
VCC = 5 V ± 0.5 V
CL =50pF
VCC = 5 V ± 0.5 V
VCC = 5 V ± 0.5 V
VCC = 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
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(TA=25°С)
PARAMETER
Power Dissipation Capacitance
SYMBOL
TEST CONDITIONS
CPD
No load, VCC = 5 V, f=1MHz
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MIN
TYP
27
MAX
UNIT
pF
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„
CMOS IC
TEST CIRCUIT AND WAVEFORMS
VCC
5V±0.5V
Input
VIN
tR, tF
VCC
≤3ns
TEST
tPLH/tPHL
tPLZ/tPZL
tPHZ/tPZH
S1
Open
VLOAD
GND
VM
VLOAD
CL
RL
VΔ
VCC/2
VCC
15pF
50pF
1kΩ
0.5V
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U74AHCT374
„
CMOS IC
TEST CIRCUIT AND WAVEFORMS(Cont.)
VIN
Input
VM
VM
tPLH
tPHL
0V
VOH
Output
VM
VM
VOL
tPLH
tPHL
VO
H
VM
Output
VM
VOL
Voltage Waveforms Propagation Delay Times
Note: A. CL includes probe and jig capacitance.
B. PRR ≤1MHz, ZO = 50Ω, tR ≤3ns, tF ≤3ns.
UTC assumes no responsibility for equipment failures that result from using products at values that
exceed, even momentarily, rated values (such as maximum ratings, operating condition ranges, or
other parameters) listed in products specifications of any and all UTC products described or contained
herein. UTC products are not designed for use in life support appliances, devices or systems where
malfunction of these products can be reasonably expected to result in personal injury. Reproduction in
whole or in part is prohibited without the prior written consent of the copyright owner. The information
presented in this document does not form part of any quotation or contract, is believed to be accurate
and reliable and may be changed without notice.
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www.unisonic.com.tw
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