FDL300D ETC, FDL300D Datasheet - Page 11

• Manufacturer Part Number: FDL300D
• Description: Fiber Optic Transceiver Solution for Seamless Digital to Light/ Light to Digital Conversion
• Manufacturer: ETC

Port State
Full Power
Low Power
Ultra-Low Power
Off
FDL300E/FDL300D (Preliminary) Revision P13
Firecomms assumes no responsibility for inaccuracies or omissions in the information
contained in this document. Specifications are subject to change without notice.
No patent rights are granted to any of the circuits described herein.
P O W E R M A N A G E M E N T F U N C T I O N S
There are four port states available when Firecomms FDL FOTs are configured for IEEE 1394 operation. These states
are described in the Port States table.
Each FOT can be in one of three states: On, Sleep, or Off. Based on these states, the port states can be implemented
as follows:
•
•
•
•
The FDL300E/D FOT pair supports the IEEE 1394b PMD wake up on LAN specification (ref: TS2004024). Low power
mode is triggered by the differential voltage signal swing at the input to the Tx dropping below 50 mV. In this case, the
Tx switches to a sleep power state consuming a maximum of 20 uA. Ultra-low power mode is triggered by a hard-
disable of the Tx, which is when the power to the Tx is switched off (Vcc = 0 V). In both low power and ultra-low
power cases, the Rx responds to the Tx powering down. With the Tx powered off, the Rx signal detect (SD) drops low
and remains low for more than 50 ms at which point the Rx also switches into sleep mode (consuming a maximum of
20 uA). The last power mode is referred to as power off. This occurs when the DC power (Vcc) to both the Tx and Rx
is hard-disabled (switched off). The wake up is described by the circuit diagrams shown in Figures 5 through 7.
Full Power: Both Tx and Rx are fully powered up
Low Power: Tx and Rx are in a sleep state
Ultra-Low Power: Tx is fully powered down (Vcc = 0 V) and Rx is in a sleep state
Off: Both Tx and Rx are fully powered down (Vcc = 0 V)
Sleep
Tx
On
Off
Off
Consumption
(Maximum)
Tx Current
55 mA
20 uA
0 A
0 A
P O R T S T A T E S
Sleep
Sleep
Rx
On
Off
Consumption
(Maximum)
Rx Current
45 mA
20 uA
20 uA
0 A
Total Maximum
FDL300E/FDL300D
Current
Tx+Rx
100 mA
40 uA
20 uA
0 A
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