MAX9150EUI-T Maxim Integrated Products, MAX9150EUI-T Datasheet - Page 7

• Manufacturer Part Number: MAX9150EUI-T
• Description: LVDS Repeater 0.45V 28-Pin TSSOP T/R
• Manufacturer: Maxim Integrated Products

Specifications of MAX9150EUI-T

• Package: 28TSSOP
• Number Of Drivers: 10
• Transmission Data Rate: 400 Mbps
• Maximum Propagation Delay Time: 3.5 ns
• Differential Input Low Threshold Voltage: -0.1 V
• Differential Input High Threshold Voltage: 0.1 V
• Typical Operating Supply Voltage: 3.3 V

Bypass each of the V
face-mount ceramic 0.1µF and 1nF capacitors in paral-
lel as close to the device as possible, with the smaller
valued capacitor closest to the V
Output trace characteristics affect the performance of
the MAX9150. Use controlled impedance traces to
match trace impedance to both the transmission medi-
um impedance and termination resistor. Ensure that
noise couples as common mode by running the differ-
ential traces close together. Reduce skew by matching
the electrical length of the traces. Excessive skew can
result in a degradation of magnetic field cancellation.
Maintain the distance between the differential traces to
avoid discontinuities in differential impedance. Avoid
90° turns and minimize the number of vias to further
prevent impedance discontinuities.
Transmission media should have a controlled differen-
tial impedance of 100Ω. Use cables and connectors
that have matched differential impedance to minimize
impedance discontinuities.
Avoid the use of unbalanced cables, such as ribbon or
simple coaxial cable. Balanced cables, such as twisted
pair, offer superior signal quality and tend to generate
Figure 1. Driver-Load Test Circuit
Applications Information
_______________________________________________________________________________________
CC
Cables and Connectors
pins with high-frequency sur-
GENERATOR
Differential Traces
CC
Low-Jitter, 10-Port LVDS Repeater
Supply Bypassing
pins.
50Ω
50Ω
RIN+
RIN-
MAX9150
less EMI due to canceling effects. Balanced cables
tend to pick up noise as common mode, which is
rejected by the LVDS receiver.
Termination resistors should match the differential char-
acteristic impedance of the transmission line. Since the
MAX9150 has current-steering devices, an output volt-
age will not be generated without a termination resistor.
Output voltage levels are dependent upon the value of
the total termination resistance. The MAX9150 pro-
duces LVDS output levels for point-to-point links that
are double terminated (100Ω at each end). With the
typical 6.4mA output current, the MAX9150 produces
an output voltage of 320mV when driving a transmis-
sion line terminated at each end with a 100Ω termina-
tion resistor (6.4mA x 50Ω = 320mV). Termination
resistance values may range between 90Ω and 150Ω,
depending on the characteristic impedance of the
transmission medium.
Minimize the distance between the output termination
resistor and the corresponding MAX9150 transmitter
output. Use ±1% surface-mount resistors.
Minimize the distance between the input termination
resistor and the MAX9150 receiver input. Use a ±1%
surface-mount resistor.
PROCESS : CMOS
Test Circuits and Timing Diagrams
V
V
OD
OD
25Ω
25Ω
25Ω
25Ω
DO1+
DO1-
DO10+
DO10-
V
V
OS
OS
Chip Information
Termination
7