SN54AHC273, SN74AHC273
OCTAL D-TYPE FLIP-FLOPS
WITH CLEAR
SCLS376G JUNE 1997 REVISED JULY 2003
1
POST OFFICE BOX 655303
DALLAS, TEXAS 75265
D
Operating Range 2-V to 5.5-V V
CC
D
Contain Eight Flip-Flops With Single-Rail
Outputs
D
Direct Clear Input
D
Individual Data Input to Each Flip-Flop
D
Applications Include:
Buffer/Storage Registers
Shift Registers
Pattern Generators
D
Latch-Up Performance Exceeds 250 mA Per
JESD 17
D
ESD Protection Exceeds JESD 22
2000-V Human-Body Model (A114-A)
1000-V Charged-Device Model (C101)
description/ordering information
These circuits are positive-edge-triggered D-type
flip-flops with a direct 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 directly related
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.
ORDERING INFORMATION
TA
PACKAGE
ORDERABLE
PART NUMBER
TOP-SIDE
MARKING
PDIP N
Tube
SN74AHC273N
SN74AHC273N
SOIC
DW
Tube
SN74AHC273DW
AHC273
SOIC DW
Tape and reel
SN74AHC273DWR
AHC273
40
C to 85
C
SOP NS
Tape and reel
SN74AHC273NSR
AHC273
40
C to 85
C
SSOP DB
Tape and reel
SN74AHC273DBR
HA273
TSSOP
PW
Tube
SN74AHC273PW
HA273
TSSOP PW
Tape and reel
SN74AHC273PWR
HA273
TVSOP DGV
Tape and reel
SN74AHC273DGVR
HA273
CDIP J
Tube
SNJ54AHC273J
SNJ54AHC273J
55
C to 125
C
CFP W
Tube
SNJ54AHC273W
SNJ54AHC273W
LCCC FK
Tube
SNJ54AHC273FK
SNJ54AHC273FK
Package drawings, standard packing quantities, thermal data, symbolization, and PCB design guidelines
are available at www.ti.com/sc/package.
On products compliant to MIL-PRF-38535, all parameters are tested
unless otherwise noted. On all other products, production
processing does not necessarily include testing of all parameters.
Copyright
2003, Texas Instruments Incorporated
PRODUCTION DATA information is current as of publication date.
Products conform to specifications per the terms of Texas Instruments
standard warranty. Production processing does not necessarily include
testing of all parameters.
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.
SN54AHC273 . . . J OR W PACKAGE
SN74AHC273 . . . DB, DGV, DW, N, NS, OR PW PACKAGE
(TOP VIEW)
SN54AHC273 . . . FK PACKAGE
(TOP VIEW)
3
2
1 20 19
9 10 11 12 13
4
5
6
7
8
18
17
16
15
14
2D
2Q
3Q
3D
4D
1D
1Q
CLR
5Q
5D
8Q
4Q
GND
CLK
V
CC
8D
7D
7Q
6Q
6D
1
2
3
4
5
6
7
8
9
10
20
19
18
17
16
15
14
13
12
11
CLR
1Q
1D
2D
2Q
3Q
3D
4D
4Q
GND
V
CC
8Q
8D
7D
7Q
6Q
6D
5D
5Q
CLK
SN54AHC273, SN74AHC273
OCTAL D-TYPE FLIP-FLOPS
WITH CLEAR
SCLS376G JUNE 1997 REVISED JULY 2003
2
POST OFFICE BOX 655303
DALLAS, TEXAS 75265
FUNCTION TABLE
(each flip-flop)
INPUTS
OUTPUT
CLR
CLK
D
OUTPUT
Q
L
X
X
L
H
H
H
H
L
L
H
L
X
Q0
logic diagram (positive logic)
CLK
1D
1Q
2D
2Q
3D
3Q
4D
4Q
5D
5Q
6D
6Q
7D
7Q
8D
8Q
CLR
1D
R
C1
1D
R
C1
1D
R
C1
1D
R
C1
1D
R
C1
1D
R
C1
1D
R
C1
1D
R
C1
3
4
7
8
13
14
17
18
2
5
6
9
12
15
16
19
11
1
logic diagram, each flip-flop (positive logic)
CLK(I)
R
Q
C
C
D
C
C
C
C
C
C
TG
C
C
TG
TG
TG
SN54AHC273, SN74AHC273
OCTAL D-TYPE FLIP-FLOPS
WITH CLEAR
SCLS376G JUNE 1997 REVISED JULY 2003
3
POST OFFICE BOX 655303
DALLAS, TEXAS 75265
absolute maximum ratings over operating free-air temperature range (unless otherwise noted)
Supply voltage range, V
CC
0.5 V to 7 V
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Input voltage range, V
I
(see Note 1)
0.5 V to 7 V
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Output voltage range, V
O
(see Note 1)
0.5 V to V
CC
+ 0.5 V
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Input clamp current, I
IK
(V
I
< 0)
20 mA
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Output clamp current, I
OK
(V
O
< 0 or V
O
> V
CC
)
20 mA
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Continuous output current, I
O
(V
O
= 0 to V
CC
)
25 mA
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Continuous current through V
CC
or GND
75 mA
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Package thermal impedance,
JA
(see Note 2): DB package
70
C/W
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
DGV package
92
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, T
stg
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)
SN54AHC273
SN74AHC273
UNIT
MIN
MAX
MIN
MAX
UNIT
VCC
Supply voltage
2
5.5
2
5.5
V
VCC = 2 V
1.5
1.5
VIH
High-level input voltage
VCC = 3 V
2.1
2.1
V
VCC = 5.5 V
3.85
3.85
VCC = 2 V
0.5
0.5
VIL
Low-level input voltage
VCC = 3 V
0.9
0.9
V
VCC = 5.5 V
1.65
1.65
VI
Input voltage
0
5.5
0
5.5
V
VO
Output voltage
0
VCC
0
VCC
V
VCC = 2 V
50
50
m
A
IOH
High-level output current
VCC = 3.3 V
0.3 V
4
4
mA
VCC = 5 V
0.5 V
8
8
mA
VCC = 2 V
50
50
m
A
IOL
Low-level output current
VCC = 3.3 V
0.3 V
4
4
mA
VCC = 5 V
0.5 V
8
8
mA
t/
v
Input transition rise or fall rate
VCC = 3.3 V
0.3 V
100
100
ns/V
t/
v
Input transition rise or fall rate
VCC = 5 V
0.5 V
20
20
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.
SN54AHC273, SN74AHC273
OCTAL D-TYPE FLIP-FLOPS
WITH CLEAR
SCLS376G JUNE 1997 REVISED JULY 2003
4
POST OFFICE BOX 655303
DALLAS, TEXAS 75265
electrical characteristics over recommended operating free-air temperature range (unless
otherwise noted)
PARAMETER
TEST CONDITIONS
VCC
TA = 25
C
SN54AHC273
SN74AHC273
UNIT
PARAMETER
TEST CONDITIONS
VCC
MIN
TYP
MAX
MIN
MAX
MIN
MAX
UNIT
2 V
1.9
1.9
1.9
IOH = 50
m
A
3 V
2.9
2.9
2.9
VOH
4.5 V
4.4
4.4
4.4
V
IOH = 4 mA
3 V
2.58
2.48
2.48
IOH = 8 mA
4.5 V
3.94
3.8
3.8
2 V
0.1
0.1
0.1
IOL = 50
m
A
3 V
0.1
0.1
0.1
VOL
4.5 V
0.1
0.1
0.1
V
IOL = 4 mA
3 V
0.36
0.5
0.44
IOL = 8 mA
4.5 V
0.36
0.5
0.44
II
VI = 5.5 V or GND
0 V to 5.5 V
0.1
1*
1
m
A
ICC
VI = VCC or GND,
IO = 0
5.5 V
4
40
40
m
A
Ci
VI = VCC or GND
5 V
2.5
10
10
pF
* On products compliant to MIL-PRF-38535, this parameter is not production tested at VCC = 0 V.
timing requirements over recommended operating free-air temperature range, V
CC
= 3.3 V
0.3 V
(unless otherwise noted) (see Figure 1)
SN54AHC273
SN74AHC273
TA = 25
C
MIN
MAX
TA = 25
C
MIN
MAX
UNIT
MIN
MAX
MIN
MAX
MIN
MAX
MIN
MAX
t
Pulse duration
CLR low
5
6
5
6
ns
tw
Pulse duration
CLK high or low
5
6.5
5
6.5
ns
t
Setup time
Data before CLK
5.5
6.5
5.5
6.5
ns
tsu
Setup time
CLR before CLK
2.5
2.5
2.5
2.5
ns
th
Hold time, data after CLK
1.5
2
1
1
ns
timing requirements over recommended operating free-air temperature range, V
CC
= 5 V
0.5 V
(unless otherwise noted) (see Figure 1)
SN54AHC273
SN74AHC273
TA = 25
C
MIN
MAX
TA = 25
C
MIN
MAX
UNIT
MIN
MAX
MIN
MAX
MIN
MAX
MIN
MAX
t
Pulse duration
CLR low
5
5
5
5
ns
tw
Pulse duration
CLK high or low
5
5
5
5
ns
t
Setup time
Data before CLK
4.5
4.5
4.5
4.5
ns
tsu
Setup time
CLR before CLK
2
2
2
2
ns
th
Hold time, data after CLK
1.5
2
1
1
ns
SN54AHC273, SN74AHC273
OCTAL D-TYPE FLIP-FLOPS
WITH CLEAR
SCLS376G JUNE 1997 REVISED JULY 2003
5
POST OFFICE BOX 655303
DALLAS, TEXAS 75265
switching characteristics over recommended operating free-air temperature range,
V
CC
= 3.3 V
0.3 V (unless otherwise noted) (see Figure 1)
PARAMETER
FROM
TO
LOAD
TA = 25
C
SN54AHC273
SN74AHC273
UNIT
PARAMETER
(INPUT)
(OUTPUT)
CAPACITANCE
MIN
TYP
MAX
MIN
MAX
MIN
MAX
UNIT
f
CL = 15 pF
75*
120*
65*
65
MHz
fmax
CL = 50 pF
50
75
45
45
MHz
tPHL
CLR
Q
CL = 15 pF
8.9*
13.6*
1*
16*
1
16
ns
tPLH
CLK
Q
CL = 15 pF
8.7*
13.6*
1*
16*
1
16
ns
tPHL
CLK
Q
CL = 15 pF
8.7*
13.6*
1*
16*
1
16
ns
tPHL
CLR
Q
CL = 50 pF
11.4
17.1
1
19.5
1
19.5
ns
tPLH
CLK
Q
CL = 50 pF
11.2
17.1
1
19.5
1
19.5
ns
tPHL
CLK
Q
CL = 50 pF
11.2
17.1
1
19.5
1
19.5
ns
tsk(o)
CL = 50 pF
1.5**
1.5
ns
* On products compliant to MIL-PRF-38535, this parameter is not production tested.
** On products compliant to MIL-PRF-38535, this parameter does not apply.
switching characteristics over recommended operating free-air temperature range,
V
CC
= 5 V
0.5 V (unless otherwise noted) (see Figure 1)
PARAMETER
FROM
TO
LOAD
TA = 25
C
SN54AHC273
SN74AHC273
UNIT
PARAMETER
(INPUT)
(OUTPUT)
CAPACITANCE
MIN
TYP
MAX
MIN
MAX
MIN
MAX
UNIT
f
CL = 15 pF
120*
165*
100*
100
MHz
fmax
CL = 50 pF
80
110
70
70
MHz
tPHL
CLR
Q
CL = 15 pF
5.2*
8.5*
1*
10*
1
10
ns
tPLH
CLK
Q
CL = 15 pF
5.8*
9*
1*
10.5*
1
10.5
ns
tPHL
CLK
Q
CL = 15 pF
5.8*
9*
1*
10.5*
1
10.5
ns
tPHL
CLR
Q
CL = 50 pF
6.7
10.5
1
12
1
12
ns
tPLH
CLK
Q
CL = 50 pF
7.3
11
1
12.5
1
12.5
ns
tPHL
CLK
Q
CL = 50 pF
7.3
11
1
12.5
1
12.5
ns
tsk(o)
CL = 50 pF
1**
1
ns
* On products compliant to MIL-PRF-38535, this parameter is not production tested.
** On products compliant to MIL-PRF-38535, this parameter does not apply.
noise characteristics, V
CC
= 5 V, C
L
= 50 pF, T
A
= 25
C (see Note 4)
PARAMETER
SN74AHC273
UNIT
PARAMETER
MIN
TYP
MAX
UNIT
VOL(P)
Quiet output, maximum dynamic VOL
0.7
V
VOL(V)
Quiet output, minimum dynamic VOL
0.7
V
VOH(V)
Quiet output, minimum dynamic VOH
4.7
V
VIH(D)
High-level dynamic input voltage
3.5
V
VIL(D)
Low-level dynamic input voltage
1.5
V
NOTE 4: Characteristics are for surface-mount packages only.
operating characteristics, T
A
= 25
C
PARAMETER
TEST CONDITIONS
TYP
UNIT
Cpd
Power dissipation capacitance
No load,
f = 1 MHz
31
pF
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