dtr-156-sm OPLINK Communications Inc., dtr-156-sm Datasheet - Page 4

• Manufacturer Part Number: dtr-156-sm
• Description: Oc-3/stm-1 & Oc-12/stm-4 Sff Single Mode Transceivers
• Manufacturer: OPLINK Communications Inc.

Transmitter Electrical Interface
Receiver Electrical Interface
Electrical Power Supply Characteristics
Application Notes
Transmitter: When the DATA+ input is at logic HIGH and
DATA- input is at logic LOW, the laser diode is on; and vice
versa. The transmitter is normally enabled (i.e. when the TX
Disable control input is not connected). When the TX Disable
control input voltage is higher than V
off independent of the input data. The transmitter has two
options for input termination. With “WS” and “WSE” versions,
the transmitter input interface is standard LV-PECL (i.e. normal
resistor termination needs to be provided externally by the user).
With the “W” and “WE” version, an internal differential 100Ω
resistor termination is provided at the transmitter input interface
for convenience (see circuit diagrams on page 5).
The transmitter incorporates an Average Power Control (APC)
loop to stabilize the transmitter average optical output power
against temperature variation. The APC loop always acts to
keep the transmitter average optical output power at a constant
value. Therefore, when the input data is all continuous “zeroes”
or all continuous “ones,” the transmitter optical output power
is a constant level equal to the nominal average optical output
power (not at the “off” level or at the “on” level).
Receiver: Both differential DATA+ and DATA- outputs are
LV-PECL levels requiring proper termination (see circuit diagram
on page 5). For optimum performance, both outputs should be
terminated in the same manner, even if only one is used.
The signal detect circuit monitors the level of the incoming
optical signal and generates a logic LOW signal when an
insufficient photocurrent is produced. If the signal detect output
is LV-TTL level, no termination is required. If the signal detect
output is LV-PECL level, a termination resistor of 160Ω to GND
Input HIGH Voltage
Input LOW Voltage
Output HIGH Voltage (LV-PECL)
Output LOW Voltage (LV-PECL)
Output HIGH Voltage (LV-TTL)
Output LOW Voltage (LV-TTL)
Output Current
1
Transmitter Disable Voltage
Transmitter Enable Voltage
Supply Voltage
Supply Current
1
With 50Ω terminated to V
Supply current does not include termination resistor current.
1
Parameter
Parameter
Parameter
CC
- 2V.
DTR-xxx-SM-LC-W & DTR-xxx-SM-LS-W
RX
TX
CC
1
1
- 1.3V, the laser is turned
(over Operating Case Temperature, V
(over Operating Case Temperature, V
Symbol
Symbol
Symbol
I
I
V
CC,TX
CC,RX
V
V
V
V
V
V
V
V
I
DIS
EN
OH
OH
OL
OL
O
CC
IH
IL
(over Operating Case Temperature, V
4
is required.
Interface circuit: The power supply line should be well-filtered.
All 0.1µF power supply bypass capacitors should be as close
to the DTR transceiver module as possible. The two front ground
posts (mounting studs) should be grounded to circuit ground
or chassis ground.
V
V
Minimum
V
V
Minimum
Minimum
V
CC
CC
CC
CC
CC
3.13
2.4
Pin Assignments
- 1.165
- 1.950
- 1.10
- 1.84
0
0
-
-
-
- 1.3
PIN
10
4
2
3
5
6
7
8
9
1
RX GND
V
SD (RX SIGNAL DETECT)
RD- (RX DATA OUT -)
RD+ (RX DATA OUT +)
V
TX GND
TX DISABLE
TD+ (TX DATA IN +)
TD- (TX DATA IN -)
CC
CC
RX
TX
CC
FUNCTION
= 3.13 to 3.47V)
Typical
Typical
Typical
CC
3.3
= 3.13 to 3.47V)
80
70
-
-
-
-
-
-
-
-
-
CC
= 3.13 to 3.47V)
V
V
Maximum
Maximum
Maximum
V
V
LOGIC FAMILY
CC
CC
CC
CC
3.47
V
120
100
V
LV-PECL
LV-PECL
LV-PECL
LV-PECL
0.8
0.8
25
- 0.700
- 1.475
- 0.90
LV-TTL
LV-TTL
- 1.60
CC
CC
21737-0295, Rev. A
-
-
-
-
9-21-2003
Units
Units
Units
mA
mA
V
V
V
V
V
V
V
V
V