Rainbow Electronics MAX9395 - Manual (Page 9)

Balanced cables such as twisted pair offer superior
signal quality and tend to generate less EMI due to
canceling effects.
Board Layout
Use a four-layer printed circuit (PC) board providing
separate signal, power, and ground planes for high-
speed signaling applications. Bypass V
CC to GND as
close to the device as possible. Install termination
resistors as close to receiver inputs as possible. Match
the electrical length of the differential traces to minimize
signal skew.
MAX9394/MAX9395
2:1 Multiplexers and 1:2 Demultiplexers with
Loopback
_______________________________________________________________________________________ 9
LOGIC INPUTS DIFFERENTIAL OUTPUTS
LB_SELA LB_SELB BSEL OUTA_ / OUTA_ OUTB / OUTB
0 0 0 INA selected INB0 selected
0 0 1 INA selected INB1 selected
0 1 X INA selected INA selected
1 0 0 INB0 selected INB0 selected
1 0 1 INB1 selected INB1 selected
1 1 0 INB0 selected INA selected
1 1 1 INB1 selected INA selected
Table 1. Input Select Truth Table
LB_SEL_ OUT_ _
GND or open Normal inputs selected.
V CC Loopback inputs selected.
Table 2. Loopback Select Truth Table
LB_SELA
0
LB
PULSE
GENERATOR
OUTA0
OUTA0
OUTA1
OUTA1
C
L
R L
R L
INA
INA
50 Ω
C L
50 Ω
C
L
C
L
MAX9394
MAX9395
ENA0 = ENA1 = HIGH
1 CHANNEL SHOWN.
FROM
CHANNEL B
R L = 100 Ω ±1%
C
L
= 1.0pF
Figure 5. Output Transition Time, Propagation Delay, and Output Channel-to-Channel Skew Test Circuit
X = Don’t care.