74LV257D 查看數據表（PDF） - Philips Electronics
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74LV257D Datasheet PDF : 12 Pages
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Philips Semiconductors
Quad 2-input multiplexer (3-State)
TEST CIRCUIT
VCC
PULSE
GENERATOR
VI
RT
D.U.T.
VO
50pF
CL
RL= 1KΩ
Test Circuit for switching times
DEFINITIONS
RT = Termination resistance should be equal to ZOUT of pulse generators.
RL = Load resistor
CL = Load capacitance includes jig and probe capacitance
TEST
tPLH/tPHL
VCC
< 2.7V
2.7–3.6V
VI
VCC
2.7V
SV00776
Figure 3. Load circuitry for switching times.
Product specification
74LV257
1998 May 20
7
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