dtr-1250-mm OPLINK Communications Inc., dtr-1250-mm Datasheet - Page 2

• Manufacturer Part Number: dtr-1250-mm
• Description: 1x9 Gigabit Ethernet 850 Nm Vcsel Transceivers
• Manufacturer: OPLINK Communications Inc.

Transmitter Electrical Interface
Receiver Electrical Interface
Electrical Power Supply Characteristics
Application Notes
DATA interface (DC-coupled module): The interface
circuit for the standard DC-coupled module with direct-
coupled PECL interface is shown in Figure 1. The
termination resistors for the transmitter should be close to
the DTR transceiver module. The termination resistors for
the receiver (50 ohms to V
equivalent resistors shown) should be close to the PHY or
SERDES IC (which receives the DATA outputs from the
receiver).
When interfacing with 3.3 V SERDES IC, AC coupling
can be used as shown in Figure 2. The termination resistors
required by the SERDES are not shown in this figure.
DATA interface (AC-coupled module): 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. The receiver can be connected directly to the
external 50 ohm load (termination resistor of the SERDES).
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.
The SIGNAL DETECT output is PECL level requiring
termination (510 ohms to GND is recommended).
Power supply and grounding: The power supply line
should be well-filtered. All 0.1 µF power supply bypass
capacitors should be as close to the DTR transceiver module
as possible. The two front GND posts should be grounded
to Circuit Ground or Chassis Ground.
21737-0307, Rev. F
03-24-2003
1
1
Input HIGH Voltage
Input LOW Voltage
Data Input Current - HIGH
Data Input Current - LOW
Output HIGH Voltage
Output LOW Voltage
Output Current
Supply Voltage
Supply Current
For AC-coupled modules, the input voltage swing is 0.3 V minimum and 1.2 V maximum.
For AC-coupled modules, the output voltage swing into 50-ohm load is 0.3 V minimum and 1 V maximum.
Parameter
Parameter
Parameter
1
1
1
1
DC-coupled module
AC-coupled module
CC
- 2 volts or the Thevenin
(over Operating Temperature, V
(over Operating Temperature, V
DTR-1250-MM
Symbol
Symbol
Symbol
V
V
V
I
I
V
V
I
I
CC
CC
I
OH
CC
H
O
OL
IH
L
IL
(over Operating Temperature, V
2
Fig.1 Interfacing DC-coupled module to direct-PECL signals
V
V
V
V
Minimum
Minimum
Minimum
CC
CC
CC
CC
+
+
Fig.2 Interfacing DC-coupled module to 3.3 V SERDES
10
ferrite inductor
+5 volt
10
4.75
ferrite inductor
+5 volt
1 H coil or
SIGNAL
DETECT
- 1.035
- 1.950
1 H coil or
- 1.165
- 1.890
µ
SIGNAL
DETECT
-
-
-
ferrite inductor
-
-
µ
ferrite inductor
1 H coil or
0.1
0.1
1 H coil or
µ
µ
CC
= 4.75 to 5.25V)
CC
510
Capacitor values in F, Resistor values in ohm
0.1
Capacitor values in F, Resistor values in ohm
510
0.1
+
= 4.75 to 5.25V)
10
4
DTR-1250-MM
+
6
10
Typical
Typical
Typical
4
9
6
DTR-1250-MM
140
160
0.1
5.0
9
POSTS
-
-
-
-
-
-
-
GND
0.1
5
POSTS
GND
CC
5
= 4.75 to 5.25V)
1
µ
8
7
2
3
µ
1
8
7
2
3
V
V
V
V
Maximum
Maximum
Maximum
130
CC
CC
82
CC
CC
5.25
200
220
350
250
190
- 0.700
- 1.595
25
270
- 0.700
- 1.475
68
82
130
190
270
68
130
82
0.01
0.01
0.01
0.01
130
82
0.1
Units
Units
Units
mA
mA
mA
µA
µA
TXD+
RXD -
V
V
V
TXD -
RXD+
V
V
RXD+
RXD -
TXD+
TXD -
0.1