Philips Semiconductors
Product specification
4-bit binary full adder with fast carry
74HC/HCT283
DC CHARACTERISTICS FOR 74HCT
For the DC characteristics see “74HC/HCT/HCU/HCMOS Logic Family Specifications”.
Output capability: standard
ICC category: MSI
Note to HCT types
The value of additional quiescent supply current (∆ICC) for a unit load of 1 is given in the family specifications.
To determine ∆ICC per input, multiply this value by the unit load coefficient shown in the table below.
INPUT
UNIT LOAD COEFFICIENT
CIN
B2, A2, A1
B1
1.50
1.00
0.40
B4, A4, A3, B3
0.50
AC CHARACTERISTICS FOR 74HCT
GND = 0 V; tr = tf = 6 ns; CL = 50 pF
Tamb (°C)
74HCT
TEST CONDITIONS
SYMBOL PARAMETER
UNIT
WAVEFORMS
VCC
(V)
+25
−40 to +85
−40 to +125
min. typ. max. min. max. min. max.
tPHL/ tPLH propagation delay
18
25
27
31
29
27
28
7
31
43
46
53
49
46
48
15
39
54
58
66
61
58
60
19
47
65
69
80
74
69
72
22
ns
ns
ns
ns
ns
ns
ns
ns
4.5
4.5
4.5
4.5
4.5
4.5
4.5
4.5
Fig.6
Fig.6
Fig.6
Fig.6
Fig.6
Fig.6
Fig.6
Fig.6
CIN to ∑1
t
t
t
t
t
PHL/ tPLH propagation delay
IN to ∑2
C
PHL/ tPLH propagation delay
CIN to ∑3
PHL/ tPLH propagation delay
CIN to ∑4
PHL/ tPLH propagation delay
An or Bn to ∑n
PHL/ tPLH propagation delay
CIN to COUT
tPHL/ tPLH propagation delay
An or Bn to COUT
t
THL/ tTLH output transition time
December 1990
7
NXP [ NXP ]
