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
PHILIPS [ NXP SEMICONDUCTORS ]
