MC74LCX138_05 Datasheet, PDF (5/8 Pages) ON Semiconductor – Low-Voltage CMOS 3-to-8 Decoder/Demultiplexer With 5 V−Tolerant Inputs

CAPACITIVE CHARACTERISTICS
Symbol
Parameter
C_IN
C_OUT
C_PD
Input Capacitance
Output Capacitance
Power Dissipation Capacitance
MC74LCX138
Condition
V_CC = 3.3 V, V_I = 0 V or V_CC
V_CC = 3.3 V, V_I = 0 V or V_CC
10 MHz, V_CC = 3.3 V, V_I = 0 V or V_CC
Typical
Unit
7
pF
8
pF
25
pF
An, E3
Vmi
V_CC
Vmi
t_PHL
t_PLH
0V
V_OH
On
Vmo
Vmo
V_OL
WAVEFORM 1: PROPAGATION DELAYS FOR INVERTING OUTPUTS
2.7 V
An, E1, E2 ^Vmi
Vmi
t_PHL
On
Vmo
t_PLH
0V
V_OH
Vmo
V_OL
WAVEFORM 2: PROPAGATION DELAYS FOR NON−INVERTING OUTPUTS
Symbol
Vmi
Vmo
3.3 V + 0.3 V
1.5 V
1.5 V
Vcc
2.7 V
1.5 V
1.5 V
2.5 V + 0.2 V
Vcc/2
Vcc/2
Figure 4. AC Waveforms
V_CC
PULSE
GENERATOR
DUT
R_T
C_L
R_L
C_L = 50 pF at V_CC = 3.3 + 0.3 V or equivalent (includes jig and probe capacitance)
C_L = 30 pF at V_CC = 2.5 + 0.2 V or equivalent (includes jig and probe capacitance)
R_L = R₁ = 500 W or equivalent
R_T = Z_OUT of pulse generator (typically 50 W)
Figure 5. Test Circuit
http://onsemi.com
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