ON Semiconductor MC14541B, Manual

Page: 5 / 10

MC14541B
www.onsemi.com
4
SWITCHING CHARACTERISTICS (Note 5)
(C
L
= 50 pF, T
A
= 25 _ C)
Characteristic Symbol V
DD
Min Typ
(Note 6)
Max Unit
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
t
TLH
,
t
THL
5.0
10
15
−
−
− 100
50
40
200
100
80
ns
Propagation Delay, Clock to Q (2
8
Output)
t
PLH
, t
PHL
= (1.7 ns/pF) C
L
+ 3415 ns
t
PLH
, t
PHL
= (0.66 ns/pF) C
L
+ 1217 ns
t
PLH
, t
PHL
= (0.5 ns/pF) C
L
+ 875 ns
t
PLH
t
PHL
5.0
10
15
−
−
− 3.5
1.25
0.9
10.5
3.8
2.9
m s
Propagation Delay, Clock to Q (2
16
Output)
t
PHL
, t
PLH
= (1.7 ns/pF) C
L
+ 5915 ns
t
PHL
, t
PLH
= (0.66 ns/pF) C
L
+ 3467 ns
t
PHL
, t
PLH
= (0.5 ns/pF) C
L
+ 2475 ns
t
PHL
t
PLH
5.0
10
15
−
−
− 6.0
3.5
2.5 18
10
7.5
m
s
Clock Pulse Width t
WH(cl)
5.0
10
15
900
300
225 300
100
85
−
−
− ns
Clock Pulse Frequency (50% Duty Cycle) f
cl
5.0
10
15
−
−
− 1.5
4.0
6.0 0.75
2.0
3.0
MHz
MR Pulse Width t
WH(R)
5.0
10
15
900
300
225 300
100
85
−
−
− ns
Master Reset Removal Time t
rem
5.0
10
15
420
200
200 210
100
100 −
−
− ns
5. The formulas given are for the typical characteristics only at 25 _ C.
6. Data labelled “Typ” is not to be used for design purposes but is intended as an indication of the IC’s potential performance.
Figure 1. Power Dissipation Test Circuit
and Waveform
Figure 2. Switching Time Test Circuit
and Waveforms
PULSE
GENERATOR
V
DD
C
L
Q
R
S
AR
Q/Q SELECT
MODE
A
B
MR
V
SS
20 ns 20 ns
90%
50%
10%
50%
DUTY CYCLE
(R
tc
AND C
tc
OUTPUTS ARE LEFT OPEN)
PULSE
GENERATOR
V
DD
R
S
AR
Q/Q SELECT
MODE
A
B
MR
V
SS
C
L
Q
20 ns
90%
50%
20 ns
10%
R
S
Q
t
PLH
50%
90%
50%
10%
50%
t
TLH
t
THL
t
PHL