MC74VHCT257A Datasheet, PDF (5/8 Pages) ON Semiconductor – Quad 2-Channel Multiplexer with 3-State Outputs

MC74VHCT257A
NOISE CHARACTERISTICS (Input t_r = t_f = 3.0ns, C_L = 50pF, V_CC = 5.0V)
Symbol
V_OLP
V_OLV
V_IHD
V_ILD
Characteristic
Quiet Output Maximum Dynamic V_OL
Quiet Output Minimum Dynamic V_OL
Minimum High Level Dynamic Input Voltage
Maximum Low Level Dynamic Input Voltage
OE
V_CC
A, B or S
50%
GND
t_PLH
t_PHL
Y
Y
50% V_CC
Y
T_A = 25°C
Typ
Max
Unit
0.3
0.8
V
– 0.3
– 0.8
V
2.0
V
0.8
V
50%
t_PZL
t_PLZ
50% V_CC
t_PZH
t_PHZ
50% V_CC
V_CC
GND
HIGH
IMPEDANCE
V_OL + 0.3V
V_OH - 0.3V
HIGH
IMPEDANCE
Figure 5. Switching Waveform
Figure 6. Switching Waveform
DEVICE
UNDER
TEST
TEST POINT
OUTPUT
C_L*
*Includes all probe and jig capacitance
Figure 7. Test Circuit
DEVICE
UNDER
TEST
TEST POINT
OUTPUT ^{1 kΩ}
C_L *
CONNECT TO V_CC WHEN
TESTING t_PLZ AND t_PZL.
CONNECT TO GND WHEN
TESTING t_PHZ AND t_PZH.
*Includes all probe and jig capacitance
Figure 8. Test Circuit
INPUT
Figure 9. Input Equivalent Circuit
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