XMT5170B-155-ST Ver la hoja de datos (PDF) - HP => Agilent Technologies
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XMT5170B-155-ST Datasheet PDF : 6 Pages
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Connection Diagram
Top View
FIBER PIGTAIL
NC
1
LASER BIAS MONITOR (+)
2
NC
3
LASER BIAS MONITOR (–)
4
VEE
5
VCC
6
TRANSMIT DISABLE
7
VCC
8
VCC
9
NC
10
20
NC
19
LASER BACK FACET MONITOR (+)
18
VCC
17
LASER BACK FACET MONITOR (–)
16
DATA
15
DATA
14
VEE
13
CASE GROUND (SEE NOTE BELOW)
12
VCC
11
CASE GROUND (SEE NOTE BELOW)
Pin Descriptions
Pins 1, 3, 10, 20, NC:
These pins should not be con-
nected 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.
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 XMT5170-155 case is plastic,
therefore pins are not connected.
Pins 15, 16, DATA, DATA:
These are differential ECL inputs.
If open circuited they float to VBB
(VCC –1.3 V).
Pin 17, Laser Back Facet
Monitor (–):
See Figure 2.
Pin 19, Laser Back Facet
Monitor (+):
See Figure 2.
PIN 2
PIN 4
VCC
LASER
3 kΩ
3 kΩ
10 Ω
MODULATION
CURRENT
IBIAS
VEE
Figure 1. Laser Bias Monitor Circuitry.
VCC
MONITOR
PHOTODIODE
PIN 19
3 kΩ
PIN 17
3 kΩ
200 Ω
TO LASER BIAS
CONTROL CIRCUITRY
Figure 2. Back Facet Monitor Circuitry.
425
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