MC14585B
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SWITCHING CHARACTERISTICS
(7.)
(C
L
= 50 pF, T
A
= 25
_
C)
Characteristic
Output Rise and Fall Time
t
TLH
, t
THL
= (1.5 ns/pF) C
L
+ 25 ns
t
TLH
, t
THL
= (0.75 ns/pF) C
L
+ 12.5 ns
t
TLH
, t
THL
= (0.55 ns/pF) C
L
+ 9.5 ns
Turn–On, Turn–Off Delay Time
t
PLH
, t
PHL
= (1.7 ns/pF) C
L
+ 345 ns
t
PLH
, t
PHL
= (0.66 ns/pF) C
L
+ 147 ns
t
PLH
, t
PHL
= (0.5 ns/pF) C
L
+ 105 ns
Symbol
t
TLH
,
t
THL
V
DD
5.0
10
15
5.0
10
15
Min
—
—
—
—
—
—
Typ
(8.)
100
50
40
430
180
130
Max
200
100
80
860
360
260
Unit
ns
t
PLH
,
t
PHL
ns
7. The formulas given are for the typical characteristics only at 25
_
C.
8. Data labelled “Typ” is not to be used for design purposes but is intended as an indication of the IC’s potential performance.
20 ns
20 ns
V
DD
A3
1
2f
B3
V
SS
V
OH
(A > B)
out
V
OL
V
OH
(A = B)
out
V
OL
V
OH
(A < B)
out
V
OL
t
TLH
Inputs (A>B) and (A=B) high, and inputs B2, A2, B1,
A1, B0, A0 and (A<B) low.
f in respect to a system clock.
(A < B)
out
t
PLH
90%
50%
10%
t
THL
V
OL
B0
10%
t
PHL
V
OH
90%
50%
V
SS
20 ns
20 ns
V
DD
V
SS
V
DD
Inputs (A>B) and (A=B) high, and inputs B3, A3, B2,
A2, B1, A1, A0, and (A<B) low.
Figure 1. Dynamic Power Dissipation
Signal Waveforms
Figure 2. Dynamic Signal Waveforms
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