Rainbow Electronics MAX4885 - Manual (Page 7)

MAX4885
Complete VGA 1:2 or 2:1 Multiplexer
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tr < 5ns
tf < 5ns
50%
0V
LOGIC
INPUT
R
L
R0, G0, B0
GND
SEL
C L INCLUDES FIXTURE AND STRAY CAPACITANCE.
V OUT = V N_
(
R L )
R L + R ON
V N_
V+
t OFF
0V
R1, G1, B1
R2, G2, B2
0.9 x V 0UT 0.9 x V OUT
t
ON
V OUT
SWITCH
OUTPUT
LOGIC
INPUT
IN DEPENDS ON SWITCH CONFIGURATION;
INPUT POLARITY DETERMINED BY SENSE OF SWITCH.
V+
C L
V+
V OUT
MAX4885
50%
Timing Circuits/Timing Diagrams
INPUT
OUTPUT
V OH
t PHL t PLH
t SKEW = | t PLH - t PHL |
t PD = MAX (t PLH , t PHL )
1V
50%
0V
50%
0.9V
50% 50%
0V
R S = R L = 50 Ω
C L = 10pF
V GEN
GND
C L
V OUT
V+
V OUT
IN
OFF
ON
OFF
∆V
OUT
Q = ( ∆V
OUT )(C L )
LOGIC INPUT WAVEFORMS INVERTED FOR SWITCHES
THAT HAVE THE OPPOSITE LOGIC SENSE.
OFF
ON
OFF
IN
V IL TO V IH
V+
R GEN
SEL
MAX4885
R0, G0, B0 R1, G1, B1
R2, G2, B2
Figure 1. Switching Time
Figure 2. Propagation Delay and Skew Waveforms
Figure 3. Charge Injection