Datasheet

UNISONIC TECHNOLOGIES CO., LTD
U74HCT374
CMOS IC
OCTAL EDGE-TRIGGERED
D-TYPE FLIP-FLOPS WITH
3-STATE OUTPUTS
„
DESCRIPTION
The U74HCT374 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 VCC through a pull-up
resistor; the minimum value of the resistor is determined by the
current-sinking capability of the driver.
„
TSSOP-20
FEATURES
* Inputs are TTL-Voltage Compatible
* Operate from 4.5V to 5.5V
* Inputs Accept Voltages to 5.5V
* Max tpd of 25ns at VCC=5.5V, CL=50pF
* Typ VOL< 0.26V at VCC=4.5V, IOL=6mA, TA=25°C
* Typ VOH> 3.98V at VCC=4.5V, IOH=-6mA, TA=25°C
„
ORDERING INFORMATION
Ordering Number
Lead Free
Halogen Free
U74HCT374L-P20-R
U74HCT374G-P20-R
U74HCT374L-P20-T
U74HCT374G-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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U74HCT374
CMOS IC
„
PIN CONFIGURATION
„
FUNCTION TABLE
„
INPUTS( OE )
INPUTS(CLK)
INPUTS(D)
OUTPUT(Q)
L
L
L
H
↑
↑
H or L
X
H
L
X
X
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
„
2 1Q
5 2Q
6 3Q
9 4Q
12 5Q
15 6Q
16 7Q
19 8Q
LOGIC DIAGRAM
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„
CMOS IC
ABSOLUTE MAXIMUM RATING
PARAMETER
SYMBOL
RATINGS
UNIT
Supply Voltage
VCC
-0.5 ~ 7
V
Input Voltage
VIN
-0.5 ~ 7
V
Output Voltage
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 temperature
„
SYMBOL
VCC
VIH
VIL
VIN
VOUT
IOH
IOL
tR, tF
TA
UNIT
V
V
V
V
V
mA
mA
ns/V
℃
RATINGS
4.5 ~ 5.5
2
0.8
0 ~ VCC
0 ~ VCC
-8
8
500
-40 ~ 85
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
II(LEAK)
Additional quiescent supply current
ΔICC
Input Capacitance
IOZ
ICC
CI
TEST CONDITIONS
VCC=4.5V, IOH=-20μA
VCC=4.5V, IOH=-6mA
VCC=4.5V, IOL=20μA
VCC=4.5V, IOL=6mA
VCC=5.5V, VIN=0 or 5.5V
VCC=5.5V, VIN=VIH or VIH,
VOUT=0 or 5.5V
VCC=5.5V, VIN=VCC or GND, IOUT=0
VCC=5.5V, one input at 0.5V or 3.4V,
Other inputs at VCC or GND
VCC=4.5V to 5V
UNISONIC TECHNOLOGIES CO., LTD
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MIN
4.4
3.98
TYP
4.499
4.3
0.001
0.17
±0.1
MAX
UNIT
±0.01
±0.5
μA
8
μA
V
0.1
V
0.26
±100 nA
1.4
2.4
mA
3
10
pF
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„
CMOS IC
TIMING REQUIREMENTS
PARAMETER
Clock Frequency
SYMBOL
fCLOCK
Pulse Width, CLK High or Low
tW
Setup Time, Data Before CLK↑
tSU
Hold Time, Data After CLK↑
tH
„
MIN
TYP
MAX
31
36
16
14
20
17
10
10
UNIT
MHz
ns
ns
ns
SWITCHING CHARACTERISTICS (See TEST CIRCUIT AND WAVEFORMS)
PARAMETER
Maximum Clock Frequency
From CLK to Q
From OE to Q
From OE to Q
Output transition rise/fall time
„
TEST CONDITIONS
VCC=4.5V
VCC=5.5V
VCC=4.5V
VCC=5.5V
VCC=4.5V
VCC=5.5V
VCC=4.5V
VCC=5.5V
SYMBOL
TEST CONDITIONS
VCC=4.5V, CL=50pF
f(MAX)
VCC=5.5V, CL=50pF
VCC=4.5V, CL=50pF
tPD
VCC=5.5V, CL=50pF
(tPLH/tPHL) VCC=4.5V, CL=150pF
VCC=5.5V, CL=150pF
VCC=4.5V, CL=50pF
tEN
VCC=5.5V, CL=50pF
(tPZL/tPZH) VCC=4.5V, CL=150pF
VCC=5.5V, CL=150pF
tDIS
VCC=4.5V, CL=50pF
(tPLZ/tPHZ) VCC=5.5V, CL=50pF
VCC=4.5V, CL=50pF
tT
VCC=5.5V, CL=50pF
(tR/tF) VCC=4.5V, CL=150pF
VCC=5.5V, CL=150pF
MIN
31
36
TYP
36
40
30
25
40
35
26
23
34
29
23
22
10
9
18
16
MAX
UNIT
MHz
36
32
46
41
30
27
40
36
30
27
12
11
42
38
ns
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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RATINGS
85
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
tW
VIN
Input
VM
VM
0
V
Pulse Duration
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„
CMOS IC
TEST CIRCUIT AND WAVEFORMS(Cont.)
VIN
Input
VM
VM
tPLH
tPHL
0V
VOH
Output
VM
VM
VOL
tPLH
tPHL
VOH
VM
Output
VM
VOL
Voltage Waveforms Propagation Delay Times
Note: A. CL includes probe and jig capacitance.
Note: 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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