UNISONIC TECHNOLOGIES CO., LTD
U74HC273
OCTAL D-TYPE FLIP-FLOPS
WITH CLEAR
DESCRIPTION
DIP-20
CMOS IC
The
U74HC273
devices are positive-edge-triggered D-type
flip-flops with a direct active low clear (CLR) input.
Information at the data (D) inputs meeting the setup time
requirements is transferred to the Q outputs on the positive-going
edge of the clock (CLK) pulse. Clock triggering occurs at a particular
voltage level and is not related directly to the transition time of the
positive-going pulse. When CLK is at either the high or low level, the
D input has no effect at the output.
SSOP-20
FEATURES
* Wide Operating Voltage Range of 2 V to 6 V
* Low Power Consumption, 80-μA Maximum ICC
*Typical t
PD
= 12 ns
* ±4mA Output Drive at 5 V
* Low Input Current of 1
μA
Maximum
* Contain Eight Flip-Flops With Single-Rail Outputs
* Direct Clear Input
* Individual Data Input to Each Flip-Flop
ORDERING INFORMATION
Ordering Number
Lead Free
U74HC273L-D20-T
U74HC273L-R20-R
Halogen Free
U74HC273G-D20-T
U74HC273G-R20-R
Package
DIP-20
SSOP-20
Packing
Tube
Tape Reel
MARKING
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QW-R502-B61.B
U74HC273
PIN CONFIGURATION
CLR
Q1
D1
D2
Q2
Q3
D3
D4
Q4
GND
1
2
3
4
5
6
7
8
9
10
20
19
18
17
16
15
13
12
11
V
DD
Q8
D8
D7
Q7
Q6
D5
Q5
CLK
CMOS IC
14 D6
FUNCTION TABLE
INPUTS
CLR
CLK
D
OUTPUT
Q
L
H
L
Q
0
L
X
X
H
↑
H
H
↑
L
H
L
X
H = High voltage level；L = Low voltage level；X = Don’t care
FUNCTIONAL BLOCK DIAGRAM
LOGIC DIAGRAM, EACH FLIP-FLOP (POSITIVE LOGIC)
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U74HC273
ABSOLUTE MAXIMUM RATING
CMOS IC
PARAMETER
SYMBOL
CONDITIONS
RATINGS
UNIT
Supply Voltage
V
CC
-0.5 ~ 7
V
Continuous Output Current
I
OUT
V
OUT
=0 ~ V
CC
±25
mA
Input Clamp Current
I
IK
V
IN
<0 or V
IN
<V
CC
±20
mA
Output Clamp Current
I
OK
V
IN
<0 or V
OUT
>V
CC
±20
mA
Storage Temperature Range
T
STG
-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.
RECOMMENDED OPERATING COMDITIONS
SYMBOL
V
CC
V
IH
V
CC
=2V
V
CC
=4.5V
V
CC
=6V
V
CC
=2V
V
CC
=4.5V
V
CC
=6V
CONDITIONS
MIN
2
1.5
3.15
4.2
TYP
5
MAX
6
UNIT
V
V
0.5
V
1.35
1.8
V
CC
V
V
CC
V
1000
500 ns/V
400
+85
°C
PARAMETER
Supply Voltage
High-Level Input Voltage
Low-Level Input Voltage
Input Voltage
Output Voltage
Input Transition Rise or Fall
Rate
Operating Temperature
V
IL
V
IN
V
OUT
t/v
T
A
0
0
V
CC
=2V
V
CC
=4.5V
V
CC
=6V
-40
ELECTRICAL CHARACTERISTICS
(T
A
=25°C, unless otherwise specified)
PARAMETER
SYMBOL
TEST CONDITIONS
V
CC
=2V, I
OH
=-20μA
V
CC
=4.5V, I
OH
=-20μA
V
CC
=6V, I
OH
=-20μA
V
CC
=4.5V, I
OH
=-4mA
V
CC
=6V, I
OH
=-5.2mA
V
CC
=2V, I
OL
=20μA
V
CC
=4.5V, I
OL
=20μA
V
CC
=6V, I
OL
=20μA
V
CC
=4.5V, I
OL
=4mA
V
CC
=6V, I
OL
=5.2mA
V
CC
=6V, V
I
=V
CC
o r0
V
CC
=6V, V
I
=V
CC
or 0, I
OUT
=0
V
CC
=2V~6V
MIN TYP
(1)
1.9 1.998
4.4 4.499
5.9 5.999
3.98
4.3
5.48
5.8
0.002
0.001
0.001
0.17
0.15
±0.1
3
MAX
UNIT
High-Level Output Voltage
V
OH
V
Low-Level Output Voltage
V
OL
Input Leakage Current
Quiescent Supply Current
Input Capacitance
I
I(LEAK)
I
CC
C
I
0.1
0.1
0.1
0.26
0.26
±100
8
10
V
μA
μA
pF
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U74HC273
SWITCHING CHARACTERISTICS
(C
L
=50pF, T
A
=25°C, unless otherwise specified)
PARAMETER
Maximum clock pulse
frequency
Propagation delay from input
( CLR ) to output (Any)
Propagation delay from input
(CLK) to output (Any)
Propagation delay to output
(Any)
SYMBOL
f
MAX
TEST CONDITIONS
V
CC
=2.0V
V
CC
=4.5V
V
CC
=6.0V
V
CC
=2.0V
V
CC
=4.5V
V
CC
=6.0V
V
CC
=2.0V
V
CC
=4.5V
V
CC
=6.0V
V
CC
=2.0V
V
CC
=4.5V
V
CC
=6.0V
MIN
5
27
32
TYP
11
50
60
55
15
12
56
15
13
38
8
6
CMOS IC
MAX
t
PHL
t
PD
t
t
160
32
27
160
32
27
75
15
13
UNIT
MHz
MHz
MHz
ns
ns
ns
ns
ns
ns
ns
ns
ns
TIMING REQUIREMENTS
(Input: t
R
, t
F
≤2.5ns;
PRR≤1MHz)
PARAMETER
SYMBOL
f
CLOCK
CLK high or
low
V
CC
= 2V
V
CC
=4.5V
V
CC
=6V
V
CC
= 2V
V
CC
=4.5V
V
CC
=6V
V
CC
= 2V
V
CC
=4.5V
V
CC
=6V
V
CC
= 2V
V
CC
=4.5V
V
CC
=6V
V
CC
= 2V
V
CC
=4.5V
V
CC
=6V
V
CC
= 2V
V
CC
=4.5V
V
CC
=6V
Conditions
MIN
TYP
MAX
5
27
32
UNIT
MHZ
MHZ
MHZ
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
Clock frequency
Pulse duration
CLR low
t
W
Data
Setup time
before CLK↑
CLR inactive
t
SU
Hold time ,data after CLK↑
t
H
80
16
14
80
16
14
100
20
17
100
20
17
0
0
0
OPERATING CHARACTERISTICS
(T
A
=25°C , unless otherwise specified)
SYMBOL
C
PD
TEST CONDITIONS
No load.
MIN
TYP
35
MAX
UNIT
pF
PARAMETER
Power Dissipation
Capacitance per flip-flop
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U74HC273
TEST CIRCUIT AND WAVEFORMS
CMOS IC
Notes: 1. C
L
includes probe and jig capacitance.
2. All input pulses are supplied by generators having the following characteristics: PRR
≤1MHz,
Z
O
= 50Ω,
t
r
= 6 ns, t
f
= 6 ns.
3. For clock inputs, fmax is measured when the input duty cycle is 50%.
4. The outputs are measured one at a time with one input transition per measurement.
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. UTC reserves the right to
make changes to information published in this document, including without limitation specifications and
product descriptions, at any time and without notice. This document supersedes and replaces all
information supplied prior to the publication hereof.
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