MAX9217ECM Maxim Integrated, MAX9217ECM Datasheet - Page 12

• Manufacturer Part Number: MAX9217ECM
• Description: Serializers & Deserializers - Serdes 27-Bit DC-Balanced Serializer
• Manufacturer: Maxim Integrated
• Type: Serializerr

Specifications of MAX9217ECM

• Data Rate: 700 Mbit/s
• Input Type: LVCMOS/LVTTL
• Output Type: LVDS
• Number Of Inputs: 27
• Number Of Outputs: 1
• Operating Supply Voltage: 3 V to 3.6 V
• Operating Temperature Range: - 40 C to + 85 C
• Package / Case: TQFP-48
• Maximum Operating Temperature: + 85 C
• Minimum Operating Temperature: - 40 C
• Mounting Style: SMD/SMT

27-Bit, 3MHz-to-35MHz
DC-Balanced LVDS Serializer
The MAX9217 has an integrated 100Ω output-termina-
tion resistor. This resistor damps reflections from
induced noise and mismatches between the transmis-
sion line impedance and termination resistors at the
deserializer input. With PWRDWN = low or with the sup-
ply off, the output termination is switched out and the
LVDS output is high impedance.
The integrated 100Ω output termination is made up of
two 50Ω resistors in series. The junction of the resistors
is connected to the CMF pin for connecting an optional
common-mode filter capacitor. Connect the filter
capacitor to ground close to the MAX9217 as shown in
Figure 13. The capacitor shunts common-mode switch-
ing current to ground to reduce EMI.
Figure 12. AC-Coupling Capacitor Values vs. Clock Frequency
of 18MHz to 35MHz
12
______________________________________________________________________________________
140
125
110
95
80
65
50
35
20
18
vs. PARALLEL CLOCK FREQUENCY
AC-COUPLING CAPACITOR VALUE
PARALLEL CLOCK FREQUENCY (MHz)
21
TWO CAPACITORS PER LINK
FOUR CAPACITORS PER LINK
24
Common-Mode Filter
27
30
33
Termination
36
Table 3. Parallel Clock Frequency Range
Select
Figure 13. Common-Mode Filter Capacitor Connection
RNG1
0
0
1
1
RNG0
0
1
0
1
CLOCK (MHz)
PARALLEL
10 to 20
20 to 35
5 to10
3 to 5
R
R
O
O
/ 2
/ 2
SERIAL DATA RATE
OUT+
CMF
OUT-
100 to 200
200 to 400
400 to 700
60 to 100
(Mbps)
C
CMF