SCLS068E − NOVEMBER 1988 − REVISED AUGUST 2003
Operating Voltage Range of 4.5 V to 5.5 V
Outputs Can Drive Up To 10 LSTTL Loads
Low Power Consumption, 80-µA Max ICC
Typical tpd = 12 ns
±4-mA Output Drive at 5 V
Low Input Current of 1 µA Max
1
20
2
19
3
18
4
17
5
16
6
15
7
14
8
13
9
12
10
11
SN54HCT273 . . . FK PACKAGE
(TOP VIEW)
VCC
8Q
8D
7D
7Q
6Q
6D
5D
5Q
CLK
2D
2Q
3Q
3D
4D
4
3 2 1 20 19
18
5
17
6
16
7
15
8
14
9 10 11 12 13
8D
7D
7Q
6Q
6D
4Q
GND
CLK
5Q
5D
CLR
1Q
1D
2D
2Q
3Q
3D
4D
4Q
GND
Inputs Are TTL-Voltage Compatible
Contain Eight D-Type Flip-Flops
Direct Clear Input
Applications Include:
− Buffer/Storage Registers
− Shift Registers
− Pattern Generators
1D
1Q
CLR
VCC
SN54HCT273 . . . J OR W PACKAGE
SN74HCT273 . . . DB, DW, N, NS, OR PW PACKAGE
(TOP VIEW)
D
D
D
D
8Q
D
D
D
D
D
D
description/ordering information
These devices are positive-edge-triggered D-type flip-flops with a common enable input. The ’HCT273 devices
are similar to the ’HCT377 devices, but feature a common clear enable (CLR) input instead of a latched clock.
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
directly related to the positive-going pulse. When CLK is at either the high or low level, the D input has no effect
at the output. The circuits are designed to prevent false clocking by transitions at CLR.
ORDERING INFORMATION
PACKAGE†
TA
PDIP − N
SN74HCT273N
Tube of 25
SN74HCT273DW
Reel of 2000
SN74HCT273DWR
SOP − NS
Reel of 2000
SN74HCT273NSR
HCT273
SSOP − DB
Reel of 2000
SN74HCT273DBR
HT273
Tube of 70
SN74HCT273PW
Reel of 2000
SN74HCT273PWR
Reel of 250
SN74HCT273PWT
CDIP − J
Tube of 20
SNJ54HCT273J
SNJ54HCT273J
CFP − W
Tube of 85
SNJ54HCT273W
SNJ54HCT273W
LCCC − FK
Tube of 55
SNJ54HCT273FK
TSSOP − PW
−55°C
−55
C to 125
125°C
C
TOP-SIDE
MARKING
Tube of 20
SOIC − DW
−40°C to 85°C
ORDERABLE
PART NUMBER
SN74HCT273N
HCT273
HT273
SNJ54HCT273FK
† Package drawings, standard packing quantities, thermal data, symbolization, and PCB design guidelines are
available at www.ti.com/sc/package.
Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of
Texas Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.
Copyright 2003, Texas Instruments Incorporated
!"#$ $%$
$&'"%$ !''#$ % & (!)*%$ %#+ '! $&'"
(#&%$ (#' # #'" & #,% $'!"#$ %$%' -%''%$.+
'!$ ('#$/ # $ $##%'*. $*!# #$/ & %**
(%'%"##'+
POST OFFICE BOX 655303
• DALLAS, TEXAS 75265
1
SCLS068E − NOVEMBER 1988 − REVISED AUGUST 2003
FUNCTION TABLE
(each flip-flop)
INPUTS
CLR
CLK
D
OUTPUT
Q
L
X
X
L
H
↑
H
H
H
↑
L
L
H
L
X
Q0
logic diagram (positive logic)
1D
CLK
2D
3
11
3D
4
1D
1D
C1
5D
8
1D
C1
R
CLR
4D
7
1D
C1
R
6D
13
1D
C1
R
7D
14
1D
C1
R
8D
17
1D
C1
R
18
1D
C1
R
C1
R
R
1
2
1Q
5
6
2Q
3Q
9
12
4Q
15
5Q
6Q
16
7Q
19
8Q
logic diagram, each flip-flop (positive logic)
D
C
C
TG
TG
Q
C
C
C
C
TG
CLK(I)
TG
C
C
C
C
R
2
POST OFFICE BOX 655303
• DALLAS, TEXAS 75265
SCLS068E − NOVEMBER 1988 − REVISED AUGUST 2003
absolute maximum ratings over operating free-air temperature range (unless otherwise noted)†
Supply voltage range, VCC . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . −0.5 V to 7 V
Input clamp current, IIK (VI < 0 or VI > VCC) (see Note 1) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ±20 mA
Output clamp current, IOK (VO < 0 or VO > VCC) (see Note 1) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ±20 mA
Continuous output current, IO (VO = 0 to VCC) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ±25 mA
Continuous current through VCC or GND . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ±50 mA
Package thermal impedance, θJA (see Note 2): DB package . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 70°C/W
DW package . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 58°C/W
N package . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 69°C/W
NS package . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 60°C/W
PW package . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 83°C/W
Storage temperature range, Tstg . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . −65°C to 150°C
† Stresses beyond those listed under “absolute maximum ratings” may cause permanent damage to the device. These are stress ratings only, and
functional operation of the device at these or any other conditions beyond those indicated under “recommended operating conditions” is not
implied. Exposure to absolute-maximum-rated conditions for extended periods may affect device reliability.
NOTES: 1. The input and output voltage ratings may be exceeded if the input and output current ratings are observed.
2. The package thermal impedance is calculated in accordance with JESD 51-7.
recommended operating conditions (see Note 3)
SN54HCT273
MIN
NOM
MAX
MIN
NOM
MAX
4.5
5
5.5
4.5
5
5.5
VCC
VIH
Supply voltage
VIL
VI
Low-level input voltage
Input voltage
0
VO
∆t/∆v
Output voltage
0
High-level input voltage
VCC = 4.5 V to 5.5 V
VCC = 4.5 V to 5.5 V
SN74HCT273
2
2
Input transition rise/fall time
V
V
0.8
VCC
VCC
UNIT
0
0
500
0.8
V
VCC
VCC
V
500
ns
V
TA
Operating free-air temperature
−55
125
−40
85
°C
NOTE 3: All unused inputs of the device must be held at VCC or GND to ensure proper device operation. Refer to the TI application report,
Implications of Slow or Floating CMOS Inputs, literature number SCBA004.
electrical characteristics over recommended operating free-air temperature range (unless
otherwise noted)
PARAMETER
TEST CONDITIONS
VCC
TA = 25°C
MIN
TYP
MAX
SN54HCT273
MIN
MAX
SN74HCT273
MIN
MAX
UNIT
4.4
4.499
4.4
4.4
VI = VIH or VIL
IOH = −20 µA
IOH = −4 mA
4.5 V
VOH
4.5 V
3.98
4.30
3.7
3.84
0.001
0.1
0.1
0.1
VI = VIH or VIL
IOL = 20 µA
IOL = 4 mA
4.5 V
VOL
4.5 V
0.17
0.26
0.4
0.33
II
ICC
VI = VCC or 0
VI = VCC or 0,
5.5 V
±0.1
±100
±1000
±1000
nA
8
160
80
µA
1.4
2.4
3
2.9
mA
3
10
10
10
pF
∆ICC‡
IO = 0
One input at 0.5 V or 2.4 V,
Other inputs at 0 or VCC
Ci
5.5 V
5.5 V
4.5 V
to 5.5 V
V
V
‡ This is the increase in supply current for each input that is at one of the specified TTL voltage levels, rather than 0 V or VCC.
0 $&'"%$ $#'$ ('! $ # &'"%1# '
#/$ (%# & #1#*("#$+ %'%#' %% %$ #'
(#&%$ %'# #/$ /%*+ #,% $'!"#$ '##'1# # '/
%$/# ' $$!# ## ('! -! $#+
POST OFFICE BOX 655303
• DALLAS, TEXAS 75265
3
SCLS068E − NOVEMBER 1988 − REVISED AUGUST 2003
timing requirements over recommended operating free-air temperature range (unless otherwise
noted)
fclock
Clock frequency
CLK high or low
tw
Pulse duration
CLR low
Data
tsu
Setup time before CLK↑
CLR inactive
th
Hold time data after CLK↑
TA = 25°C
MIN
MAX
SN54HCT273
VCC
4.5 V
25
16
20
5.5 V
28
19
23
MIN
SN74HCT273
MAX
MIN
4.5 V
20
30
25
5.5 V
18
25
22
4.5 V
16
24
20
5.5 V
14
20
17
4.5 V
20
30
25
5.5 V
17
25
21
4.5 V
20
30
25
5.5 V
17
25
21
4.5 V
0
0
0
5.5 V
0
0
0
MAX
UNIT
MHz
ns
ns
ns
switching characteristics over recommended operating free-air temperature range, VCC = 5 V ± 0.5 V,
CL = 50 pF (unless otherwise noted) (see Figure 1)
SN54HCT273
PARAMETER
FROM
(INPUT)
TO
(OUTPUT)
VCC
MIN
fmax
tpd
CLR
Any
tPHL
CLR
Any
tt
Any
TA = 25°C
TYP
MAX
MIN
4.5 V
25
31
16
5.5 V
28
37
19
MAX
UNIT
MHz
4.5 V
15
34
50
5.5 V
12
29
42
4.5 V
17
15
50
5.5 V
15
34
42
4.5 V
8
18
22
5.5 V
7
19
21
ns
ns
ns
switching characteristics over recommended operating free-air temperature range, VCC = 5 V ± 0.5 V,
CL = 50 pF (unless otherwise noted) (see Figure 1)
SN74HCT273
PARAMETER
FROM
(INPUT)
TO
(OUTPUT)
fmax
tpd
CLR
Any
tPHL
CLR
Any
tt
Any
VCC
POST OFFICE BOX 655303
MIN
4.5 V
25
31
20
5.5 V
28
37
23
MAX
15
34
42
5.5 V
12
29
36
4.5 V
17
34
42
5.5 V
15
29
36
4.5 V
8
15
19
5.5 V
7
14
17
• DALLAS, TEXAS 75265
UNIT
MHz
4.5 V
0 $&'"%$ $#'$ ('! $ # &'"%1# '
#/$ (%# & #1#*("#$+ %'%#' %% %$ #'
(#&%$ %'# #/$ /%*+ #,% $'!"#$ '##'1# # '/
%$/# ' $$!# ## ('! -! $#+
4
TA = 25°C
MIN
TYP
MAX
ns
ns
ns
SCLS068E − NOVEMBER 1988 − REVISED AUGUST 2003
operating characteristics, VCC = 5 V, TA = 25°C
PARAMETER
Cpd
TEST CONDITIONS
Power dissipation capacitance
No load
TYP
30
UNIT
pF
PARAMETER MEASUREMENT INFORMATION
From Output
Under Test
Test
Point
3V
High-Level
Pulse
1.3 V
0V
CL = 50 pF
(see Note A)
tw
1.3 V
1.3 V
0V
3V
1.3 V
3V
Low-Level
Pulse
LOAD CIRCUIT
Input
1.3 V
VOLTAGE WAVEFORMS
PULSE DURATIONS
1.3 V
0V
tPLH
In-Phase
Output
1.3 V
10%
tPHL
90%
90%
tr
Out-ofPhase
Output
tPHL
90%
VOH Reference
1.3 V
Input
10% V
OL
tf
tPLH
1.3 V
10%
1.3 V
10%
90%
tf
VOH
Data
Input 1.3 V
0.3 V
3V
1.3 V
0V
tsu
2.7 V
VOL
tr
tr
VOLTAGE WAVEFORMS
SETUP AND HOLD AND INPUT RISE AND FALL TIMES
th
2.7 V
3V
1.3 V
0.3 V 0 V
tf
VOLTAGE WAVEFORMS
PROPAGATION DELAY AND OUTPUT RISE AND FALL TIMES
NOTES: A. CL includes probe and test-fixture capacitance.
B. Phase relationships between waveforms were chosen arbitrarily. All input pulses are supplied by generators having the following
characteristics: PRR ≤ 1 MHz, ZO = 50 Ω, tr = 6 ns, tf = 6 ns.
C. The outputs are measured one at a time with one input transition per measurement.
D. For clock inputs, fmax is measured when the input duty cycle is 50%.
E. tPLH and tPHL are the same as tpd.
Figure 1. Load Circuit and Voltage Waveforms
POST OFFICE BOX 655303
• DALLAS, TEXAS 75265
5
PACKAGE OPTION ADDENDUM
www.ti.com
24-Aug-2018
PACKAGING INFORMATION
Orderable Device
Status
(1)
Package Type Package Pins Package
Drawing
Qty
Eco Plan
Lead/Ball Finish
MSL Peak Temp
(2)
(6)
(3)
Op Temp (°C)
Device Marking
(4/5)
SN74HCT273DBR
ACTIVE
SSOP
DB
20
2000
Green (RoHS
& no Sb/Br)
CU NIPDAU
Level-1-260C-UNLIM
-40 to 85
HT273
SN74HCT273DW
ACTIVE
SOIC
DW
20
25
Green (RoHS
& no Sb/Br)
CU NIPDAU
Level-1-260C-UNLIM
-40 to 85
HCT273
SN74HCT273DWE4
ACTIVE
SOIC
DW
20
25
Green (RoHS
& no Sb/Br)
CU NIPDAU
Level-1-260C-UNLIM
-40 to 85
HCT273
SN74HCT273DWG4
ACTIVE
SOIC
DW
20
25
Green (RoHS
& no Sb/Br)
CU NIPDAU
Level-1-260C-UNLIM
-40 to 85
HCT273
SN74HCT273DWR
ACTIVE
SOIC
DW
20
2000
Green (RoHS
& no Sb/Br)
CU NIPDAU
Level-1-260C-UNLIM
-40 to 85
HCT273
SN74HCT273DWRG4
ACTIVE
SOIC
DW
20
2000
Green (RoHS
& no Sb/Br)
CU NIPDAU
Level-1-260C-UNLIM
-40 to 85
HCT273
SN74HCT273N
ACTIVE
PDIP
N
20
20
Pb-Free
(RoHS)
CU NIPDAU
N / A for Pkg Type
-40 to 85
SN74HCT273N
SN74HCT273NSR
ACTIVE
SO
NS
20
2000
Green (RoHS
& no Sb/Br)
CU NIPDAU
Level-1-260C-UNLIM
-40 to 85
HCT273
SN74HCT273PW
ACTIVE
TSSOP
PW
20
70
Green (RoHS
& no Sb/Br)
CU NIPDAU
Level-1-260C-UNLIM
-40 to 85
HT273
SN74HCT273PWE4
ACTIVE
TSSOP
PW
20
70
Green (RoHS
& no Sb/Br)
CU NIPDAU
Level-1-260C-UNLIM
-40 to 85
HT273
SN74HCT273PWR
ACTIVE
TSSOP
PW
20
2000
Green (RoHS
& no Sb/Br)
CU NIPDAU
Level-1-260C-UNLIM
-40 to 85
HT273
SN74HCT273PWT
ACTIVE
TSSOP
PW
20
250
Green (RoHS
& no Sb/Br)
CU NIPDAU
Level-1-260C-UNLIM
-40 to 85
HT273
(1)
The marketing status values are defined as follows:
ACTIVE: Product device recommended for new designs.
LIFEBUY: TI has announced that the device will be discontinued, and a lifetime-buy period is in effect.
NRND: Not recommended for new designs. Device is in production to support existing customers, but TI does not recommend using this part in a new design.
PREVIEW: Device has been announced but is not in production. Samples may or may not be available.
OBSOLETE: TI has discontinued the production of the device.
(2)
RoHS: TI defines "RoHS" to mean semiconductor products that are compliant with the current EU RoHS requirements for all 10 RoHS substances, including the requirement that RoHS substance
do not exceed 0.1% by weight in homogeneous materials. Where designed to be soldered at high temperatures, "RoHS" products are suitable for use in specified lead-free processes. TI may
reference these types of products as "Pb-Free".
RoHS Exempt: TI defines "RoHS Exempt" to mean products that contain lead but are compliant with EU RoHS pursuant to a specific EU RoHS exemption.
Addendum-Page 1
Samples
PACKAGE OPTION ADDENDUM
www.ti.com
24-Aug-2018
Green: TI defines "Green" to mean the content of Chlorine (Cl) and Bromine (Br) based flame retardants meet JS709B low halogen requirements of