MC14541B_06 Datasheet, PDF (4/10 Pages) ON Semiconductor – Programmable Timer

MC14541B
ÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎ SWITCHING CHARACTERISTICS (Note 5) (C_L = 50 pF, T_A = 25_C)
ÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎ Characteristic
Symbol
V_DD
Min
Typ
Max
Unit
(Note 6)
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
Propagation Delay, Clock to Q (2⁸ 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
Propagation Delay, Clock to Q (2¹⁶ 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
Clock Pulse Width
t_TLH,
ns
t_THL
5.0
−
100
200
10
−
50
100
15
−
40
80
t_PLH
ms
t_PHL
5.0
−
3.5
10.5
10
−
1.25
3.8
15
−
0.9
2.9
t_PHL
ms
t_PLH
5.0
−
6.0
18
10
−
3.5
10
15
−
2.5
7.5
t_WH(cl)
5.0
900
300
10
300
100
15
225
85
−
ns
−
−
Clock Pulse Frequency (50% Duty Cycle)
f_cl
5.0
−
1.5
0.75
MHz
10
−
4.0
2.0
15
−
6.0
3.0
MR Pulse Width
t_WH(R)
5.0
900
300
10
300
100
15
225
85
−
ns
−
−
Master Reset Removal Time
t_rem
5.0
420
210
−
ns
10
200
100
−
15
200
100
−
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.
V_DD
V_DD
PULSE
GENERATOR
R_S
AR
Q/Q SELECT
MODE
Q
A
C_L
B
MR
V_SS
(R_tc AND C_tc OUTPUTS ARE LEFT OPEN)
20 ns
20 ns
90% _50%
10%
50%
DUTY CYCLE
Figure 1. Power Dissipation Test Circuit
and Waveform
PULSE
GENERATOR
R_S
AR
Q/Q SELECT
MODE
A
B
Q
C_L
MR
V_SS
20 ns
R_S
t_PLH
90% _50%
10%
50% ^90%
Q
10%
t_TLH
20 ns
50%
50%
t_PHL
t_THL
Figure 2. Switching Time Test Circuit
and Waveforms
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