DTR-1250-SM-LC OPLINK [OPLINK Communications Inc.], DTR-1250-SM-LC Datasheet - Page 2

• Manufacturer Part Number: DTR-1250-SM-LC
• Description: 3.3V LC connector SFF Gigabit Ethernet CWDM Laser Transceivers
• Manufacturer: OPLINK [OPLINK Communications Inc.]

Transmitter Electrical Interface
Receiver Electrical Interface
Electrical Power Supply Characteristics
Application Notes
DATA interface (DC-coupled modules):
The interface circuit for standard DC-coupled
modules with direct-coupled LV-PECL
interface is shown in Fig. 1. The Transmitter
input has internal 50 ohm termination.
DATA interface (AC-coupled modules):
For modules with AC coupling option, both
transmitter and receiver interface has internal
bias, termination and AC coupling capacitor.
The transmitter can be connected directly to
the driving SERDES as shown in Fig. 2. The
receiver can be connected directly to the
external 50 ohm loads (termination resistor
of the SERDES). For best performance, both
DATA+ & DATA- should be used.
TX DISABLE: The transmitter is normally
enabled (i.e. when the TX DISABLE control
input is not connected or at LV-TTL logic
LOW). When the TX DISABLE voltage is
higher than V
independent of the input data.
SIGNAL DETECT: The Signal Detect
circuit monitors the level of the incoming
optical signal and generates a logic LOW
signal when insufficient photocurrent is
produced. Its output is LV-TTL with no
termination required.(Option for LVPECL is
also avalible.)
21737-0342, Rev. B
1-28-02
1
1
Input HIGH Voltage
Input LOW Voltage
Output HIGH Voltage (LV-PECL)
Output LOW Voltage (LV-PECL)
Output Current
Output HIGH Voltage (LV-TTL)
Output LOW Voltage (LV-TTL)
2
1
Transmitter Disable Voltage
Transmitter Enable Voltage
Supply Voltage
Supply Current
For AC-coupled modules, the input voltage swing is 0.25 V minimum and 1.2 V maximum single-ended.
With 50 ohm terminated to V
For AC-coupled modules, the output voltage swing into 50-ohm load is 0.3 V minimum and 1 V maximum single-ended.
Supply current does not include termination.
CC
- 1.3 V, the laser is turned off
1
Parameter
Parameter
Parameter
1
1
DC-coupled module
AC-coupled module
CC
- 2 volt (for DC-coupled modules).
1,2
1,2
(over Operating Case Temperature Range)
(over Operating Case Temperature Range)
Symbol
Symbol
Symbol
SIGNAL DETECT
V
V
V
V
V
SIGNAL DETECT
V
V
V
I
I
+
V
+
I
CC
CC
DIS
OH
OH
10
EN
OL
O
OL
CC
ferrite inductor
+3.3 volt
10
IH
ferrite inductor
IL
+3.3 volt
TX DISABLE
1 H coil or
1 H coil or
TX DISABLE
µ
ferrite inductor
µ
ferrite inductor
1 H coil or
0.1
1 H coil or
0.1
µ
µ
(over Operating Case Temperature Range)
2
V
V
Minimum
V
V
Minimum
Minimum
V
CC
CC
0.1
0.1
CC
CC
CC
3.13
+
+
2.4
10
10
- 1.165
- 1.950
- 1.10
- 1.84
0
Capacitor values in F, Resistor values in ohm
0
-
-
-
8
3
8
3
- 1.3
6
6
Capacitor values in F, Resistor values in ohm
7
7
0.1
0.1
POSTS
GND
POSTS
GND
2
2
100
1
100
10
1
5
4
9
Typical
Typical
Typical
depending on SERDES
10
9
5
4
160
185
TXD+
TXD -
RXD+
3.3
RXD -
µ
-
-
-
-
-
-
-
-
-
TXD+
TXD -
RXD+
RXD -
µ
160
50 ohm line
50 ohm line
50 ohm line
50 ohm line
50 ohm line
50 ohm line
160
50 ohm line
50 ohm line
Fig.2 AC-coupled modules
depending on SERDES
Fig.1 DC-coupled modules
V
V
Maximum
Maximum
Maximum
V
V
CC
CC
CC
CC
3.47
160
230
255
V
V
0.8
0.8
25
- 0.700
- 1.475
- 0.90
- 1.60
CC
CC
160
100
100
160
160
LV-PECL
LV-PECL
SERDES
Units
Units
Units
mA
mA
mA
V
V
V
V
V
V
V