3 / 7 page
HG Genuine
GBIC Transceiver
MGB-243S
Receiver Loss of Signal
Assert Time _Logic low to high
tA, RX-LOS
100
us
Receiver Loss of Signal
Assert Time _Logic high to low
tD, RX-LOS
100
us
Pin Figure:
Figure 1
Pin Definitions:
Pin
Signal Name
Description
1
RX-LOS
Receiver Loss of Signal, TTL high, open collector
2
RGND
Receiver Ground
3
RGND
Receiver Ground
4
MOD_DEF(0)
TTL Low
5
MOD_DEF(1)
SCL Serial Clock Signal
6
MOD_DEF(2)
SDA Serial Data Signal
7
TX-DISABLE
Transmitter Disable
8
TGND
Transmitter Ground
9
TGND
Transmitter Ground
10
TX-FAULT
Transmit Fault
11
RGND
Receiver Ground
12
-RX_DAT
Receiver Data, Differential PECL, AC coupled
13
+RX_DAT
Receiver Data, Differential PECL, AC coupled
14
RGND
Receiver Ground
15
VDDR
Receiver supply
16
VDDT
Transmitter supply
17
TGND
Transmitter Ground
18
+TX_DAT
Transmitter Data, Differential PECL, AC coupled
19
-TX_DAT
Transmitter Data, Differential PECL, AC coupled
20
TGND
Transmitter Ground
Functions Description:
The laser is driven by a LD driver IC which converts differential input LVPECL (3.3V) or PECL (5V) logic
signals into an analog laser driving current.
MGB-243X complies with Module Definition 4. It features an EEPROM that contains the detailed product
3of7