max9208eait Maxim Integrated Products, Inc., max9208eait Datasheet - Page 11

• Manufacturer Part Number: max9208eait
• Description: 10-bit Bus Lvds Deserializers
• Manufacturer: Maxim Integrated Products, Inc.

Table 2. Input/Output Function Table
X = don’t care
The MAX9206/MAX9208 deserializers can operate in a
variety of topologies. Examples of double-terminated
point-to-point and point-to-point broadcast are shown
in Figures 10 and 11. Use 1% surface-mount termina-
tion resistors.
A point-to-point interface terminated at each end in the
characteristic impedance of the cable or PC board
traces is shown in Figure 10. The total load seen by the
serializer is 50Ω. The double termination typically
reduces reflections compared to a single 100Ω termi-
nation. A single 100Ω termination at the deserializer
input is feasible and makes the differential signal swing
larger.
A point-to-point version of a multidrop bus is shown in
Figure 11. The low-jitter MAX9150 10-port repeater is
used to reproduce and transmit the serializer output
over 10 double-terminated point-to-point links.
Compared to a bus, more interconnect is traded for
robust hot-plug capability.
The repeater eliminates nine serializers compared to 10
individual point-to-point serializer-to-deserializer con-
nections. Since repeater jitter is a component of the
total jitter seen at the deserializer input (along with
other sources of jitter), a low-jitter repeater is essential
in most high data-rate applications.
A four-layer PC board providing separate power,
ground, and signal layers is recommended. Keep the
LVTTL/LVCMOS inputs and outputs separated from the
BLVDS inputs to prevent coupling into the BLVDS lines.
REN
High
Low
X
LOGIC INPUTS
PWRDN
High
High
Low
______________________________________________________________________________________
Power applied and stable
Deserializer initialized
Deserializer initialized
CONDITIONS
Board Layout
Topologies
10-Bit Bus LVDS Deserializers
Power-down mode. PLL is stopped. Current consumption is reduced
to 400µA (typ). ROUT_, RCLK, and LOCK are high impedance.
RCLK and ROUT_ are high impedance. LOCK is active, indicating
the serial input status.
RCLK and ROUT_ are active. LOCK is active, indicating the serial
input status.
TRANSISTOR COUNT: 9602
PROCESS: CMOS
TOP VIEW
RCLK_R/F
REFCLK
PWRDN
AGND
AGND
AGND
DGND
RCLK
LOCK
AV
AV
REN
RI+
RI-
CC
CC
OUTPUTS
10
11
12
13
14
1
2
3
4
5
6
7
8
9
MAX9206/
MAX9208
SSOP
Pin Configuration
Chip Information
28
27
26
25
24
23
22
21
20
19
18
17
16
15
ROUT0
ROUT1
ROUT2
ROUT3
ROUT4
DV
DGND
DV
DGND
ROUT5
ROUT6
ROUT7
ROUT8
ROUT9
CC
CC
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