74HC283 查看數據表（PDF） - Philips Electronics
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74HC283 Datasheet PDF : 8 Pages
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Philips Semiconductors
4-bit binary full adder with fast carry
Product specification
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
CIN
B2, A2, A1
B1
B4, A4, A3, B3
UNIT LOAD COEFFICIENT
1.50
1.00
0.40
0.50
AC CHARACTERISTICS FOR 74HCT
GND = 0 V; tr = tf = 6 ns; CL = 50 pF
Tamb (°C)
SYMBOL PARAMETER
74HCT
+25
−40 to +85
min. typ. max. min. max.
tPHL/ tPLH propagation delay
CIN to ∑1
18 31
39
tPHL/ tPLH propagation delay
CIN to ∑2
25 43
54
tPHL/ tPLH propagation delay
CIN to ∑3
27 46
58
tPHL/ tPLH propagation delay
CIN to ∑4
31 53
66
tPHL/ tPLH propagation delay
An or Bn to ∑n
29 49
61
tPHL/ tPLH propagation delay
CIN to COUT
27 46
58
tPHL/ tPLH propagation delay
An or Bn to COUT
28 48
60
tTHL/ tTLH output transition time
7 15
19
TEST CONDITIONS
−40 to +125
UNIT
VCC
(V)
min. max.
WAVEFORMS
47 ns 4.5 Fig.6
65 ns 4.5 Fig.6
69 ns 4.5 Fig.6
80 ns 4.5 Fig.6
74 ns 4.5 Fig.6
69 ns 4.5 Fig.6
72 ns 4.5 Fig.6
22 ns 4.5 Fig.6
December 1990
7
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