Datasheet

UNISONIC TECHNOLOGIES CO., LTD
U74HC373
CMOS IC
OCTAL D-TYPE
TRANSPARENT LATCH

DIP-20
DESCRIPTION
The U74HC373 consists of eight D-type transparent latches
with 3-state outputs. When letch-enable (LE) is high, the latches
operate at the transparent mode, and the latches’ output will
change
corresponding with the data present at D0 to D7. When
output-enable (OE) is low, the contents of the latches will be
present at the outputs. The outputs will be in the high impedance
when OE goes high.

SOP-20
SSOP-20
TSSOP-20
FEATURES
* Operation Voltage Range: 2~6V
* Drive Up to 15 LSTTL Loads
* 3-State Outputs
* Output Capability Suitable for Bus Driving

ORDERING INFORMATION
Ordering Number
Lead Free
Halogen Free
U74HC373L-D20-T
U74HC373G-D20-T
U74HC373G-S20-R
U74HC373G-R20-R
U74HC373G-P20-R

Package
Packing
DIP-20
SOP-20
SSOP-20
TSSOP-20
Tube
Tape Reel
Tape Reel
Tape Reel
MARKING
DIP-20
www.unisonic.com.tw
Copyright © 2015 Unisonic Technologies Co., Ltd
SOP-20 / SSOP-20 / TSSOP-20
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U74HC373

PIN CONFIGURATION

FUNCTION TABLE
INPUTS(LE)
INPUTS( OE )
L
H
L
H
L
L
H
X
Note: H: HIGH voltage level; L: LOW voltage level.

LOGIC SYMBOL

LOGIC DIAGRAM
CMOS IC
INPUTS(D)
H
L
X
X
UNISONIC TECHNOLOGIES CO., LTD
www.unisonic.com.tw
OUTPUT(Q)
H
L
Q0
Z
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U74HC373

CMOS IC
ABSOLUTE MAXIMUM RATING (TA=25°С, unless otherwise specified)
PARAMETER
SYMBOL
RATINGS
UNIT
Supply Voltage
VCC
-0.5 ~ 7
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
°C
Storage Temperature
TSTG
-65 ~ + 150
°C
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.

THERMAL DATA
PARAMETER
Junction to Ambient

SYMBOL
DIP-20
SOP-20
SSOP-20
TSSOP-20
UNIT
°C/W
RECOMMENDED OPERATING CONDITIONS (TA=25°С, unless otherwise specified)
PARAMETER
Supply Voltage
SYMBOL
VCC
High-level Input Voltage
VIH
Low-level Input Voltage
VIL
Input Voltage
Output Voltage
VIN
VOUT
Input Rise or Fall Times
tR, tF

θJA
RATINGS
52
80
96
103
TEST CONDITIONS
VCC=2.0V
VCC=4.5V
VCC=6.0V
VCC=2.0V
VCC=4.5V
VCC=6.0V
High or low state
VCC=2.0V
VCC=4.5V
VCC=6.0V
MIN
2
1.5
3.15
4.2
0
0
0
0
0
TYP
5
MAX
6
UNIT
V
V
0.5
1.35
1.8
VCC
VCC
1
0.5
0.4
V
V
V
μs
ELECTRICAL CHARACTERISTICS (TA=25°С, unless otherwise specified)
PARAMETER
Output Voltage High-Level
Output Voltage Low-Level
Input Leakage Current
Disable Output Leakage Current
Quiescent Supply Current
Input Capacitance
SYMBOL
VOH
VOL
II(LEAK)
IOZ
IQ
CIN
TEST CONDITIONS
VCC=2.0V
VCC=4.5V IOH=-20μA, VIN=VIH or VIL
VCC=6.0V
VCC=4.5V, IOH=-6mA, VIN=VIH or VIL
VCC=6.0V, IOH=-7.8mA, VIN=VIH or VIL
VCC=2.0V
VCC=4.5V IOH=-20μA, VIN=VIH or VIL
VCC=6.0V
VCC=4.5V, IOL=6mA, VIN=VIH or VIL
VCC=6.0V, IOL=7.8mA, VIN=VIH or VIL
VCC=6.0V, VIN=VCC or 0
VCC=6.0V, VOUT=VCC or 0
VCC=6.0V, VIN=VCC or 0, IOUT=0
VCC=2.0V~6.0V
UNISONIC TECHNOLOGIES CO., LTD
www.unisonic.com.tw
MIN
1.9
4.4
5.9
3.98
5.48
TYP
1.998
4.499
5.999
4.3
5.8
2
1
1
170
150
±0.1
±0.01
3
MAX
UNIT
V
100
100
100
260
260
±100
±0.5
8
10
mV
nA
μA
μA
pF
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U74HC373

CMOS IC
SWITCHING CHARACTERISTICS (see test circuit and waveforms)
PARAMETER
SYMBOL
Propagation delay from input
(D) to output (Q)
tPLH/tPHL
Propagation delay from input
(LE) to output (Q)
Output enable time from input
( OE ) to output (Q)
Output disable time from input
( OE ) to output (Q)
tPZL/tPZH
tPLZ/tPHZ
to Q
tT
Pulse Width
tW
Setup Time
tSU
Hold Time
tH

TEST CONDITIONS
VCC=2.0V
CL=50pF
VCC=4.5V
VCC=6.0V
VCC=2.0V
VCC=4.5V
CL=150pF
VCC=6.0V
VCC=2.0V
CL=50pF
VCC=4.5V
VCC=6.0V
VCC=2.0V
CL=150pF
VCC=4.5V
VCC=6.0V
VCC=2.0V
VCC=4.5V
CL=50pF
VCC=6.0V
VCC=2.0V
CL=150pF
VCC=4.5V
VCC=6.0V
VCC=2.0V
CL=50pF
VCC=4.5V
VCC=6.0V
VCC=2.0V
CL=150pF
VCC=4.5V
VCC=6.0V
VCC=2.0V
VCC=4.5V
VCC=6.0V
VCC=2.0V
VCC=4.5V
VCC=6.0V
VCC=2.0V
VCC=4.5V
VCC=6.0V
MIN
TYP
58
15
13
82
22
19
73
18
15
100
24
20
65
17
14
90
23
19
50
15
13
28
8
6
80
16
14
50
10
9
20
10
10
MAX
150
30
26
200
40
34
175
35
30
225
45
38
150
30
26
200
40
34
150
30
26
60
12
10
TYP
100
MAX
UNIT
ns
ns
ns
ns
ns
ns
ns
OPERATING CHARACTERISTICS (TA=25°С, unless otherwise specified)
PARAMETER
Power Dissipation Capacitance
SYMBOL
TEST CONDITIONS
CPD
No Load
UNISONIC TECHNOLOGIES CO., LTD
www.unisonic.com.tw
MIN
UNIT
pF
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U74HC373

CMOS IC
TEST CIRCUIT AND WAVEFORMS
RL
tPZH
tPZL
tPHZ
tPLZ
tPHL
tPLH
1kΩ
1kΩ
-
CL
S1
50pF, Open
150pF Closed
Open
50pF
Closed
50pF,
Open
150pF
S2
Closed
Open
Closed
Open
Open
Note: CL includes probe and jig capacitance.
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.
UNISONIC TECHNOLOGIES CO., LTD
www.unisonic.com.tw
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