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PLN
LED
MNT
PLN
LED
MNT
PWR
EN
GND
PWR
EN
GND
1P8V
1P5V
LED MONITOR
JMP98
JMP99
U28
JMP100
JMP101
1P5V AND 1P8V LEDS DISABLED
COMPLETELY
PLN
LED
MNT
PLN
LED
MNT
PWR
EN
GND
PWR
EN
GND
1P8V
1P5V
LED MONITOR
JMP98
JMP99
U28
JMP100
JMP101
1P5V AND 1P8V LEDS DISABLED
COMPLETELY
(JMP57 SHUNT
POSITION IS A
DON’T CARE)
(JMP57 SHUNT
POSITION IS A
DON’T CARE)
Power Monitoring LEDs
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Figure 6. TLK6002 EVM Voltage Monitor LED Disabled Example
Placing the jumper on the DIRECT side of the LED Monitor/Direct Connect selection header connects the
LED drive circuit to the power plane itself, causing the LED to be lit when the voltage is great enough to
cause current to flow through the LED drive circuit. This LED configuration has been designed to be used
when pushing the lower limits of the acceptable voltage range to continue to provide an indicator that
power is on the plane, however, without regards to what that voltage may actually be.
The jumper on the Voltage Monitor Enable/Disable header does not matter as this is only the input to the
voltage monitor circuit, which has been bypassed when the LED drive circuit is connected directly to the
power plane itself.
Figure 7. TLK6002 EVM Voltage Monitor LED Connected Directly to Plane Example
10
TLK6002 Dual-Channel, 0.47-Gbps to 6.25-Gbps, Multi-Rate Transceiver
SLLU132 – October 2010
Evaluation Module
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