HP XMT5170A-622-AS, XMT5170A-622-AP, XMT5170B-622-AS, XMT5170B-622-AP Datasheet
622 Mb/s Logic Interface DFB
Laser Transmitter
Preliminary Technical Data
XMT5170-622
Features
• SONET/SDH Compliant to
STM4 L-4.1
OC12 LR-1
• –40°C to +85°C Operation
• Compact 20 Pin Package
• ECL/PECL Logic Interface
• Multisourced Pinout
Applications
• SONET/SDH Systems
• Fiber to the Home
• Data Communications
Networks
Description
The XMT5170-622 is a high
performance uncooled optical
DFB laser transmitter for CCITT
SDH and ANSI SONET
applications. It is designed with
an ECL/PECL logic interface for
622 MBd transmission.
The transmitter incorporates
several features which simplify
system design. The
XMT5170-622 may be operated
with either +5 V or –5 V power
supplies. Its standard 10 KH ECL
data interface enables direct
interface with PECL or ECL logic.
The compact transmitter module
contains a pigtailed laser, data
interface, bias and modulation
control circuitry. Thus, no
external components or adjustments are necessary. Finally, a
laser disable input is provided to
shut down the laser for standby
or test purposes.
The XMT5170-622 includes
analog outputs which are
proportional to laser current and
optical power. These may be used
with external circuitry to detect
end-of-life, or over temperature
conditions.
The transmitter is packaged in a
20 pin 0.4" pitch DIP. Contact
your local representative for
more details.
Preliminary Product Disclaimer
This preliminary data sheet is provided to assist you in the evaluation of engineering samples of the product which is under development
and targeted for release during 1997. Until Hewlett-Packard releases this product for general sales, HP reserves the right to alter prices,
specifications, features, capabilities, function, manufacturing release dates, and even general availability of the product at any time.
430
(5/97)
Connection Diagram
Top View
FIBER PIGTAIL
NC
LASER BIAS MONITOR (+)
NC
LASER BIAS MONITOR (–)
V
EE
V
CC
TRANSMIT DISABLE
V
CC
V
CC
NC
Pin Descriptions
Pins 1, 3, 10, 20, NC:
These pins should not be connected and should be left open
circuit on the application PCB.
Pin 2, Laser Bias Monitor (+):
See Figure 1.
Pin 4, Laser Bias Monitor (–):
See Figure 1.
Pins 5, 14, VEE:
These pins are connected to
ground in +5 V systems and –5 V
in negative supply systems.
1
2
3
4
5
6
7
8
9
10
20
19
18
17
16
15
14
13
12
11
NC
LASER BACK FACET MONITOR (+)
V
CC
LASER BACK FACET MONITOR (–)
DATA
DATA
V
EE
CASE GROUND (SEE NOTE BELOW)
V
CC
CASE GROUND (SEE NOTE BELOW)
Pins 6, 8, 9, 12, 18, VCC:
These pins are connected to +5 V
for positive supply systems and
ground for –5.2 V systems.
Pin 7, Transmit Disable:
Pin 7 floats to VEE when open
circuited, enabling the
transmitter. It must be biased
within 3 V of VCC to disable.
Pins 11, 13, Ground:
The XMT5170-622 case is plastic,
therefore pins are not connected.
Pins 15, 16, DATA, DATA:
These are differential ECL inputs.
If open circuited they float to V
BB
(VCC –1.3 V).
Pin 17, Laser Back Facet
Monitor (–):
See Figure 2.
Pin 19, Laser Back Facet
Monitor (+):
See Figure 2.
V
PIN 2
PIN 4
3 kΩ
3 kΩ
CC
LASER
10 Ω
I
BIAS
V
EE
MODULATION
CURRENT
PIN 19
PIN 17
MONITOR
PHOTODIODE
3 kΩ
3 kΩ
V
CC
200 Ω
TO LASER BIAS
CONTROL CIRCUITRY
Figure 1. Laser Bias Monitor Circuitry. Figure 2. Back Facet Monitor Circuitry.
431
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