MC14555B_06 Datasheet, PDF (3/6 Pages) ON Semiconductor – Dual Binary to 1−of−4 Decoder/Demultiplexer

MC14555B, MC14556B
ÎÎÎÎSWÎÎITCÎÎHINÎÎG CÎÎHARÎÎACÎÎTERÎÎISTÎÎICSÎÎ(NoÎÎte 5ÎÎ) (CÎÎ_L = 5ÎÎ0 pFÎÎ, T_AÎÎ= 25ÎΰC)ÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎ_TyÎÎ_p ÎÎÎÎÎÎÎÎÎÎÎÎ
Characteristic
Symbol
V_DD
Min
(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,
ns
t_THL
5.0
−
100
200
10
−
50
100
15
−
40
80
Propagation Delay Time − A, B to Output
t_PLH, t_PHL = (1.7 ns/pF) C_L + 135 ns
t_PLH, t_PHL = (0.66 ns/pF) C_L + 62 ns
t_PLH, t_PHL = (0.5 ns/pF) C_L + 45 ns
t_PLH,
ns
t_PHL
5.0
−
220
440
10
−
95
190
15
−
70
140
Propagation Delay Time − E to Output
t_PLH, t_PHL = (1.7 ns/pF) C_L + 115 ns
t_PLH, t_PHL = (0.66 ns/pF) C_L + 52 ns
t_PLH, t_PHL = (0.5 ns/pF) C_L + 40 ns
t_PLH,
ns
t_PHL
5.0
−
200
400
10
−
85
170
15
−
65
130
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.
INPUT E LOW
20 ns
20 ns
90%
V_DD
50%
A INPUTS
1
10%
V_SS
(50% DUTY CYCLE)
2f
V_DD
B INPUTS
V_SS
(50% DUTY CYCLE)
V_OH
OUTPUT Q1
V_OL
All 8 outputs connect to respective C_L loads.
f in respect to a system clock.
Figure 1. Dynamic Power Dissipation Signal Waveforms
20 ns
INPUT A HIGH, INPUT E LOW
20 ns
INPUT B
t_PHL
OUTPUT Q3
MC14556B
t_THL
t_PLH
OUTPUT Q3
MC14555B
t_TLH
90%
50%
10%
90%
50%
10%
90%
50%
10%
V_DD
V_SS
t_PLH
V_OH
t_TLH ^VOL
t_PHL
V_OH
V_OL
t_THL
Figure 2. Dynamic Signal Waveforms
LOGIC DIAGRAM
(1/2 of Dual)
A
B
E
*Eliminated for MC14555B
http://onsemi.com
3
*
Q0
*
Q1
*
Q2
*
Q3