Datasheet

UNISONIC TECHNOLOGIES CO., LTD
U74AHCT373
CMOS IC
OCTAL TRANSPARENT D-TYPE
LATCHES WITH 3-STATE
OUTPUTS
„
DESCRIPTION
The U74AHCT373 is an octal transparent D-type latch with
3-state outputs and 8 channels.
When the OE input is low and the LE input is high, the Q
TSSOP-20
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 8.5ns at VCC=5V, CL=15pF
„
ORDERING INFORMATION
Ordering Number
Lead Free
Halogen Free
U74AHCT373L-P20-R
U74AHCT373G-P20-R
U74AHCT373L-P20-T
U74AHCT373G-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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„
„
CMOS IC
PIN CONFIGURATION
OE
1
20 VCC
1Q
2
19
8Q
1D
3
18
8D
2D
4
17
7D
2Q
5
16 7Q
3Q
6
15 6Q
3D
7
14
4D
8
13 5D
4Q
9
12
GND
10
6D
5Q
11 LE
FUNCTION TABLE
INPUTS( OE )
INPUTS(LE)
L
H
L
H
L
L
H
X
Note: H: HIGH voltage level; L: LOW voltage level.
„
LOGIC SYMBOL
„
LOGIC DIAGRAM
UNISONIC TECHNOLOGIES CO., LTD
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INPUTS(D)
H
L
X
X
OUTPUT(Q)
H
L
Q0
Z
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CMOS IC
ABSOLUTE MAXIMUM RATING
PARAMETER
SYMBOL
RATINGS
UNIT
Supply Voltage Range
VCC
-0.5 ~ 7
V
Input Voltage Range (Note 3)
VI
-0.5 ~ 7
V
Output Voltage Range (Note 3)
VO
-0.5 ~ VCC +0.5
V
Input Clamp Current
IIK
-20
mA
Output Clamp Current
IOK
±20
mA
Output Current
IO
±25
mA
VCC or GND Current
ICC
±75
mA
Storage Temperature
TSTG
-65 ~ +150
℃
Note: 1. Absolute maximum ratings are those values beyond which the device could be permanently damaged.
2. Absolute maximum ratings are stress ratings only and functional device operation is not implied.
3. The input and output voltage ratings may be exceeded if the input and output current ratings are observed.
„
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 (TA=25°C)
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
Output Capacitance
CI
CO
IOZ
ICC
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
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 3.4V,
Other inputs at VCC or GND
VCC=5V, VIN=VCC or GND
VCC=5V, VOUT=VCC or GND
UNISONIC TECHNOLOGIES CO., LTD
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MIN
4.4
3.94
TYP
4.5
MAX
UNIT
V
0.1
0.36
±0.1
V
μA
±0.25 μA
4
9
4
μA
1.35
mA
10
pF
pF
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CMOS IC
SWITCHING CHARACTERISTICS
PARAMETER
SYMBOL
From D to Q
tPLH/tPHL
From LE to Q
From OE to Q
tPZL/tPZH
From OE to Q
tPLZ/tPHZ
Pulse Width, LE High
Setup Time, Data Before LE↓
Hold Time, Data After LE↓
„
tW
tSU
tH
TEST CONDITIONS
VCC=5V±0.5V, CL=15pF
VCC=5V±0.5V, CL=50pF
VCC=5V±0.5V, CL=15pF
VCC=5V±0.5V, CL=50pF
VCC=5V±0.5V, CL=15pF
VCC=5V±0.5V, CL=50pF
VCC=5V±0.5V, CL=15pF
VCC=5V±0.5V, CL=50pF
VCC=5V±0.5V
VCC=5V±0.5V
VCC=5V±0.5V
MIN
TYP
5.1
5.9
7.7
8.5
6.3
7.1
6
6.8
MAX
8.5
9.5
12.3
13.3
10.9
11.9
10.2
11.2
6.5
1.5
3.5
UNIT
ns
ns
ns
ns
ns
ns
OPERATING CHARACTERISTICS(TA=25°С)
PARAMETER
Power Dissipation Capacitance
SYMBOL
TEST CONDITIONS
CPD
No load, f=1MHz
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MIN
TYP
17
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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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.
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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