Datasheet
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
NXP Semiconductors
74HC273; 74HCT273
Octal D-type flip-flop with reset; positive-edge trigger
6. Functional description
[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.
7. Limiting values
[1] The input and output voltage ratings may be exceeded if the input and output current ratings are observed.
[2] For DIP20 package: above 70 C the value of P
tot
derates linearly with 12 mW/K.
[3] 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.
Table 3. Function table
[1]
Operating modes Inputs Outputs
MR CP Dn Qn
reset (clear) L X X L
load “1” H hH
load “0” H lL
Table 4. Limiting values
In accordance with the Absolute Maximum Rating System (IEC 60134). Voltages are referenced to GND (ground = 0 V)
Symbol Parameter Conditions Min Max Unit
V
CC
supply voltage 0.5 +7 V
I
IK
input clamping current V
I
< 0.5 V or V
I
>V
CC
+0.5V
[1]
- 20 mA
I
OK
output clamping current V
O
< 0.5 V or V
O
>V
CC
+0.5V
[1]
- 20 mA
I
O
output current 0.5 V < V
O
< V
CC
+0.5V - 25 mA
I
CC
supply current - 50 mA
I
GND
ground current 50 - mA
T
stg
storage temperature 65 +150 C
P
tot
total power dissipation T
amb
= 40 C to +125 C
DIP20 package
[2]
- 750 mW
SO20, SSOP20, TSSOP20 and
DHVQFN20 package
[3]
- 500 mW