fcm-8519-2-t4 Finisar Corporation., fcm-8519-2-t4 Datasheet - Page 3

• Manufacturer Part Number: fcm-8519-2-t4
• Description: Copper Gbic Transceiver
• Manufacturer: Finisar Corporation.

Low Speed Signals, Electronic
Characteristics
Parameter
GBIC Output LOW
GBIC Output HIGH
GBIC Input LOW
GBIC Input HIGH
Low Speed Signal Parameters
Parameter
RX_LOS Assert Level
RX_LOS Deassert Level
RX_LOS Hysteresis
RX_LOS Assert Delay
RX_LOS Negate Delay
TX_DISABLE Assert Time
TX_DISABLE Negate Time
TX Output Amplitude,
TX_DISABLE Asserted
FCM -8519-1-T4/FCM-8519-2-T4 Product Specification
TX_DISABLE is a TTL signal as described in Tables 3 and 4. RX_LOS is a CMOS
open drain output. MOD_DEF(1) (SCL) and MOD_DEF(2) (SDA) are open drain
CMOS signals (see section VII, “Serial Communication Protocol”). Note that all Finisar
copper GBICs are 'module definition 4' since they support the serial identification
protocol. MOD_DEF(1), MOD_DEF(2), and RX_LOS must be pulled up to host_Vcc.
For more detailed information, see sections 5.3.1 – 5.3.8 in the GBIC Specification Rev.
5.4
Finisar Corporation 03/10/2000
1
.
Symbol
V
V
Table 4. Low speed signals – electronic characteristics
V
V
OH
OL
IL
IH
Table 5. Low speed signal parameters (preliminary)
t_loss_on
t_loss_off
Symbol
t_off
t_on
host_Vcc -
--
--
--
Min
0.5
0
0
2
Min
host_Vcc +
Vcc + 0.3
Typ
50
90
40
10
10
5
5
Max
0.5
0.3
0.8
Max
1000
100
100
10
70
Units Notes/Conditions
V
V
V
V
Units Notes/Conditions
mV
mV
mV
mV
sec
sec
sec
sec
4.7k to 10k pull-up to host_Vcc,
measured at host side of connector
4.7k to 10k pull-up to host_Vcc,
measured at host side of connector
4.7k to 10k pull-up to Vcc,
measured at GBIC side of
connector
4.7k to 10k pull-up to Vcc,
measured at GBIC side of
connector
From detection of loss of signal
to assertion of RX_LOS
From detection of presence of
signal to negation of RX_LOS
Rising edge of TX_DISABLE to
fall of output signal below 10%
of nominal
Falling edge of TX_DISABLE to
rise of output signal above 90%
of nominal
Peak to peak
F i n i s a r
Page 3