74HC273; 74HCT273
Octal D-type flip-flop with reset; positive-edge trigger
Rev. 4 — 10 June 2013
Product data sheet
1. General description
The 74HC273; 74HCT273 is an octal positive-edge triggered D-type flip-flop. The device
features clock (CP) and master reset (MR) inputs. The outputs Qn will assume the state of
their corresponding Dn inputs that meet the set-up and hold time requirements on the
LOW-to-HIGH clock (CP) transition. A LOW on MR forces the outputs LOW independently
of clock and data inputs. Inputs include clamp diodes. This enables the use of current
limiting resistors to interface inputs to voltages in excess of V
CC
.
2. Features and benefits
Input levels:
For 74HC273: CMOS level
For 74HCT273: TTL level
Common clock and master reset
Eight positive edge-triggered D-type flip-flops
Complies with JEDEC standard no. 7A
ESD protection:
HBM JESD22-A114F exceeds 2000 V
MM JESD22-A115-A exceeds 200 V.
Multiple package options
Specified from
40 C
to +85
C
and from
40 C
to +125
C
3. Ordering information
Table 1.
Ordering information
Package
Temperature range Name
74HC273N
74HCT273N
74HC273D
74HCT273D
74HC273DB
74HCT273DB
40 C
to +125
C
SSOP20
plastic shrink small outline package; 20 leads; body width
5.3 mm
SOT339-1
40 C
to +125
C
SO20
plastic small outline package; 20 leads; body width 7.5 mm SOT163-1
40 C
to +125
C
DIP20
Description
plastic dual in-line package; 20 leads (300 mil)
Version
SOT146-1
Type number
NXP Semiconductors
74HC273; 74HCT273
Octal D-type flip-flop with reset; positive-edge trigger
Table 1.
Ordering information
…continued
Package
Temperature range Name
Description
plastic thin shrink small outline package; 20 leads; body
width 4.4 mm
Version
SOT360-1
SOT764-1
40 C
to +125
C
40 C
to +125
C
TSSOP20
Type number
74HC273PW
74HCT273PW
74HC273BQ
74HCT273BQ
DHVQFN20 plastic dual in-line compatible thermal enhanced very thin
quad flat package; no leads; 20 terminals;
body 2.5
4.5
0.85 mm
4. Functional diagram
CP
MR
11
11
1
C1
R
3
4
7
8
13
14
17
18
1
11
D0
D1
D2
D3
D4
D5
D6
D7
MR
CP
FF1
TO
FF8
Q0
Q1
Q2
Q3
Q4
Q5
Q6
Q7
2
5
6
9
12
15
16
19
3
4
7
8
13
14
17
18
CP
D0
D1
D2
D3
D4
D5
D6
D7
MR
1
Q0
Q1
Q2
Q3
Q4
Q5
Q6
Q7
D0
2
5
6
9
12
15
16
19
D1
D2
D3
D4
D5
D6
D7
mna763
3
4
7
8
13
14
17
18
1D
2
5
6
9
12
15
16
19
mna764
Q0
Q1
Q2
Q3
Q4
Q5
Q6
Q7
001aae055
Fig 1.
Functional diagram
Fig 2.
Logic symbol
Fig 3.
IEC logic symbol
74HC_HCT273
All information provided in this document is subject to legal disclaimers.
© NXP B.V. 2013. All rights reserved.
Product data sheet
Rev. 4 — 10 June 2013
2 of 21
NXP Semiconductors
74HC273; 74HCT273
Octal D-type flip-flop with reset; positive-edge trigger
D0
D1
D2
D3
D
Q
D
Q
D
Q
D
Q
CP
FF1
R
D
CP
CP
FF2
R
D
CP
FF3
R
D
CP
FF4
R
D
MR
Q0
D4
D5
Q1
D6
Q2
D7
Q3
D
Q
D
Q
D
Q
D
Q
CP
FF5
R
D
CP
FF6
R
D
CP
FF7
R
D
CP
FF8
R
D
Q4
Q5
Q6
Q7
001aae056
Fig 4.
Logic diagram
74HC_HCT273
All information provided in this document is subject to legal disclaimers.
© NXP B.V. 2013. All rights reserved.
Product data sheet
Rev. 4 — 10 June 2013
3 of 21
NXP Semiconductors
74HC273; 74HCT273
Octal D-type flip-flop with reset; positive-edge trigger
5. Pinning information
5.1 Pinning
74HC273
74HCT273
terminal 1
index area
20 V
CC
19 Q7
18 D7
17 D6
16 Q6
15 Q5
14 D5
GND
(1)
13 D4
12 Q4
GND 10
CP 11
MR
2
3
4
5
6
7
8
9
1
Q0
D0
MR
Q0
D0
D1
Q1
Q2
D2
D3
Q3
1
2
3
4
5
6
7
8
9
20 V
CC
19 Q7
18 D7
17 D6
16 Q6
15 Q5
14 D5
13 D4
12 Q4
11 CP
001aae053
74HC273
74HCT273
D1
Q1
Q2
D2
D3
Q3
GND 10
001aae054
Transparent top view
(1) This is not a supply pin. The substrate is attached to this
pad using conductive die attach material. There is no
electrical or mechanical requirement to solder this pad.
However, if it is soldered, the solder land should remain
floating or be connected to GND.
Fig 5.
Pin configuration DIP20, SO20, SSOP20 and
TSSOP20
Fig 6.
Pin configuration DHVQFN20
5.2 Pin description
Table 2.
Symbol
MR
Q0, Q1, Q2, Q3, Q4, Q5, Q6, Q7
D0, D1, D2, D3, D4, D5, D6, D7
GND
CP
V
CC
Pin description
Pin
1
2, 5, 6, 9, 12, 15, 16, 19
3, 4, 7, 8, 13, 14, 17, 18
10
11
20
Description
master reset input (active LOW)
flip-flop output
data input
ground (0 V)
clock input (LOW-to-HIGH, edge-triggered)
supply voltage
74HC_HCT273
All information provided in this document is subject to legal disclaimers.
© NXP B.V. 2013. All rights reserved.
Product data sheet
Rev. 4 — 10 June 2013
4 of 21
NXP Semiconductors
74HC273; 74HCT273
Octal D-type flip-flop with reset; positive-edge trigger
6. Functional description
Table 3.
Function table
[1]
Inputs
MR
reset (clear)
load “1”
load “0”
[1]
H = HIGH voltage level;
h = HIGH voltage level one set-up time prior to the LOW-to-HIGH clock transition;
L = LOW voltage level;
l = LOW voltage level one set-up time prior to the LOW-to-HIGH clock transition;
X = don’t care;
= LOW-to-HIGH clock transition.
Operating modes
Outputs
CP
X
Dn
X
h
l
Qn
L
H
L
L
H
H
7. Limiting values
Table 4.
Limiting values
In accordance with the Absolute Maximum Rating System (IEC 60134). Voltages are referenced to GND (ground = 0 V)
Symbol
V
CC
I
IK
I
OK
I
O
I
CC
I
GND
T
stg
P
tot
Parameter
supply voltage
input clamping current
output clamping current
output current
supply current
ground current
storage temperature
total power dissipation
T
amb
=
40 C
to +125
C
DIP20 package
SO20, SSOP20, TSSOP20 and
DHVQFN20 package
[1]
[2]
[3]
[2]
[3]
Conditions
V
I
<
0.5
V or V
I
> V
CC
+ 0.5 V
V
O
<
0.5
V or V
O
> V
CC
+ 0.5 V
0.5
V < V
O
< V
CC
+ 0.5 V
[1]
[1]
Min
0.5
-
-
-
-
50
65
-
-
Max
+7
20
20
25
50
-
+150
750
500
Unit
V
mA
mA
mA
mA
mA
C
mW
mW
The input and output voltage ratings may be exceeded if the input and output current ratings are observed.
For DIP20 package: above 70
C
the value of P
tot
derates linearly with 12 mW/K.
For SO20 package: above 70
C
the value of P
tot
derates linearly with 8 mW/K.
For SSOP20 and TSSOP20 packages: above 60
C
the value of P
tot
derates linearly with 5.5 mW/K.
For DHVQFN20 packages: P
tot
derates linearly with 4.5 mW/K above 60
C.
74HC_HCT273
All information provided in this document is subject to legal disclaimers.
© NXP B.V. 2013. All rights reserved.
Product data sheet
Rev. 4 — 10 June 2013
5 of 21
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