Texas Instruments LMX2594PSEVM, Руководство пользователя

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9.2 Output Format Selection
The OE pin is used to enable or disable the output.
The OS pin is used to bias internal drivers and change the output format.
Table 9-2. Reference PRO Output Format Selection
OE OS OUTPUT FORMAT
GND Don't Care Disabled
Vdd GND LVPECL
Vdd NC LVDS
Vdd Vdd HCSL
It is imperative to match the output termination passive components as shown in Table 9-3 .
Table 9-3. Output Termination Configuration
OUTPUT FORMAT COUPLING COMPONENT VALUE
LVPECL AC (Default configuration) R15, R28 0 Ω
R26, R29 150 Ω
C24, C25 0.01 µF
R27, R30, R31 DNP
DC
(1)
R15, R28, C24, C25 0 Ω
R26, R27, R29, R30, R31 DNP
LVDS
(2)
AC R25, R27, R28, R30 0 Ω
R31 100 Ω
C24, C25 0.01 µF
R26, R29 DNP
DC R25, R27, R28, R30, C24, C25 0 Ω
R31 100 Ω
R26, R29 DNP
HCSL AC R15, R28 0 Ω
R26, R29 50 Ω
C24, C25 0.01 µF
R27, R30, R31 DNP
DC R25, R28, C24, C25 0 Ω
R26, R29 50 Ω
R27, R30, R31 DNP
(1) 50-Ω to VCC – 2-V termination is required on receiver.
(2) 100-Ω differential termination (R31) is provided onboard. Removing this termination is possible if the differential termination is available
on the receiver.
www.ti.com Reference PRO
SNAU278 – JULY 2022
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LMX2594PSEVM Evaluation Instructions 17
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