U74HCT373_15 [UTC]
OCTAL TRANSPARENT D-TYPE LATCHES WITH;
| 型号： | U74HCT373_15 |
| 厂家： | 
Unisonic Technologies |
| 描述： | OCTAL TRANSPARENT D-TYPE LATCHES WITH |
| 文件： | 总6页 (文件大小：232K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
UNISONIC TECHNOLOGIES CO., LTD
U74HCT373
CMOS IC
OCTAL TRANSPARENT
D-TYPE LATCHES WITH
3-STATE OUTPUTS
DESCRIPTION
The U74HCT373 is an octal transparent D-type latch with
3-state outputs, and it has 8 channels.
TSSOP-20
When the OE input is low and the LE input is high, the Q
outputs follow the D inputs. When OE is low and LE is low, the
Q outputs are latched at the logic levels of the D inputs.
When the OE input is high, the outputs are in the
high-impedance. The OE does not affect the internal operations
of the latches. Old data can be retained or new data can be
entered while the outputs are in the high-impedance state.
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 21ns at VCC=5.5V, CL=50pF
* Typ VOL< 0.26V at VCC=4.5V, IOL=6mA, TA=25°C
* Typ VOH> 3.94V at VCC=4.5V, IOH=-6mA, TA=25°C
ORDERING INFORMATION
Ordering Number
Lead Free
Package
Packing
Halogen Free
U74HCT373L-P20-R
U74HCT373L-P20-T
U74HCT373G-P20-R
U74HCT373G-P20-T
TSSOP-20
TSSOP-20
Tape Reel
Tube
www.unisonic.com.tw
Copyright © 2011 Unisonic Technologies Co., Ltd
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U74HCT373
CMOS IC
PIN CONFIGURATION
VCC
OE
1Q
1D
2D
2Q
1
2
3
4
5
20
19
18
17
8Q
8D
7D
7Q
6Q
6D
16
15
14
3Q
3D
6
7
8
4D
13 5D
12 5Q
4Q
9
LE
11
GND
10
FUNCTION TABLE
INPUTS( OE )
INPUTS(LE)
INPUTS(D)
OUTPUT(Q)
L
L
H
H
L
H
L
H
L
L
X
X
Q0
Z
H
X
Note: H: HIGH voltage level; L: LOW voltage level.
LOGIC SYMBOL
LOGIC DIAGRAM
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U74HCT373
CMOS IC
ABSOLUTE MAXIMUM RATING
PARAMETER
SYMBOL
VCC
VI
RATINGS
-0.5 ~ 7
-0.5 ~ 7
-0.5 ~ VCC +0.5
-20
UNIT
Supply voltage
V
V
Input voltage (Note 3)
Output voltage (Note 3)
Input clamp current
Output clamp current
Output current
VO
V
IIK
mA
mA
mA
mA
℃
IOK
±20
IO
±35
VCC or GND current
Storage temperature
ICC
±70
TSTG
-65 ~ +150
Note: 1. Absolute maximum ratings are those values beyond which the device could be permanently damaged.
Note: Absolute maximum ratings are stress ratings only and functional device operation is not implied.
Note: 2. The input and output voltage ratings may be exceeded if the input and output current ratings are observed.
RECOMMENDED OPERATING CONDITIONS
PARAMETER
SYMBOL
VCC
MIN
4.5
2
TYP
MAX
5.5
UNIT
V
Supply Voltage
High-Level Input Voltage
Low-Level Input Voltage
Input Voltage
VIH
V
VIL
0.8
5.5
VCC
500
85
V
VIN
0
0
V
Output Voltage
VOUT
tR, tF
TA
V
ns/V
℃
Input Rise or Fall Times
Operating free-air temperature
-40
ELECTRICAL CHARACTERISTICS (TA=25°C)
PARAMETER
SYMBOL
TEST CONDITIONS
VCC=4.5V, IOH=-20μA
MIN
TYP
MAX
UNIT
4.4
4.499
4.3
Output Voltage High-Level
Output Voltage Low-Level
VOH
V
V
VCC=4.5V, IOH=-6mA
VCC=4.5V, IOL=20μA
VCC=4.5V, IOL=6mA
3.98
0.001
0.17
±0.1
0.1
VOL
0.26
VCC=5.5V, VIN=0 or 5.5V
±100 ꢀnA
Input Leakage Current
II(LEAK)
IOZ
VCC=5.5V, VIN=VIH or VIH,
Leakage Current (For Output in
High-Impedance State)
±0.01
±0.5 ꢀμA
VOUT=0 or 5.5V
V
CC=5.5V, VIN=VCC or GND, IOUT=0
8
ꢀμA
mA
pF
Quiescent Supply Current
ICC
VCC=5.5V,one Input at 0.5V or3.4V,
Other Inputs at VCC or GND
ΔICC
CI
1.4
3
2.4
10
Additional quiescent supply current
Input Capacitance
VCC=4.5V to 5V
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U74HCT373
CMOS IC
SWITCHING CHARACTERISTICS
PARAMETER
SYMBOL
TEST CONDITIONS
VCC=4.5V, CL=50pF
MIN
TYP
25
21
32
27
28
25
38
36
26
23
33
28
23
22
10
9
MAX
35
32
52
47
35
32
52
47
35
32
52
47
35
32
12
11
42
38
UNIT
VCC=5.5V, CL=50pF
VCC=4.5V, CL=150pF
VCC=5.5V, CL=150pF
VCC=4.5V, CL=50pF
VCC=5.5V, CL=50pF
VCC=4.5V, CL=150pF
From D to Q
From LE to Q
tPD
ns
(tPLH/tPHL
)
VCC=5.5V, CL=150pF
VCC=4.5V, CL=50pF
VCC=5.5V, CL=50pF
VCC=4.5V, CL=150pF
VCC=5.5V, CL=150pF
VCC=4.5V, CL=50pF
tEN
From OE to Q
ns
ns
ns
(tPZL/tPZH
)
tDIS
From OE to Q
(tPLZ/tPHZ
)
VCC=5.5V, CL=50pF
VCC=4.5V, CL=50pF
VCC=5.5V, CL=50pF
VCC=4.5V, CL=150pF
VCC=5.5V, CL=150pF
VCC=4.5V
tT
(tR/tF)
Output transition rise/fall time
18
16
20
17
10
9
Pulse Width, LE high
tW
tSU
tH
ns
ns
ns
VCC=5.5V
VCC=4.5V
Setup Time, data before LE↓
Hold Time, data after LE↓
VCC=5.5V
VCC=4.5V
10
10
VCC=5.5V
OPERATING CHARACTERISTICS(TA=25°С)
PARAMETER
Power Dissipation Capacitance
SYMBOL
CPD
TEST CONDITIONS
No Load
RATINGS
50
UNIT
pF
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U74HCT373
CMOS IC
TEST CIRCUIT AND WAVEFORMS
TEST
tPLH/tPHL
tPLZ/tPZL
tPHZ/tPZH
S1
Open
VLOAD
GND
Input
VCC
VM
VLOAD
VCC
CL
RL
VΔ
VIN
tR, tF
15pF
50pF
5V±0.5V
VCC
≤3ns
VCC/2
1kΩ
0.5V
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U74HCT373
CMOS IC
TEST CIRCUIT AND WAVEFORMS(Cont.)
VIN
Input
VM
VM
0V
tPHL
tPLH
VOH
Output
VM
VM
VOL
tPLH
tPHL
VOH
VM
VM
Output
VOL
Voltage Waveforms Propagation Delay Times
Note: A. CL includes probe and jig capacitance.
B. PRR ≤1MHz, ZO = 50Ω, tR ≤6ns, tF ≤6ns.
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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