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參數(shù)資料
| 型號： | TZA3001U |
| 廠商： | NXP SEMICONDUCTORS |
| 元件分類： | 其它接口 |
| 英文描述： | SDH/SONET STM4/OC12 laser drivers |
| 中文描述： | SPECIALTY INTERFACE CIRCUIT, UUC40 |
| 封裝： | 2 X 2 X 0.38 MM, DIE-40 |
| 文件頁數(shù)： | 9/22頁 |
| 文件大?。?/td> | 517K |
| 代理商： | TZA3001U |
1999 Aug 24
9
Philips Semiconductors
Preliminary specification
SDH/SONET STM4/OC12 laser drivers
TZA3001AHL; TZA3001BHL;
TZA3001U
Example:
The following reference currents are required to
limit the bias current range between 6 and 90 mA:
and
The corresponding resistor values are:
×
90 mA
and
If the alarm condition is true, the voltage on pin ALARM
goes to HIGH-level (CMOS). This signal could be used, for
example, to disable the laser driver by driving pin ALS
(a latch is needed in between to prevent oscillation).
Loop mode for TZA3001BHL
In the loop mode the total system application can be
tested. It allows for uninhibited optical transmission
through the fibre front-end (from the photodiode through
thetransimpedancestageandthedataandclockrecovery
unit, to the laser driver and via the laser back to the fibre).
It should be noted that the optical receiver used in
conjunction with the TZA3001BHL must have a loop mode
output in order to complete the test loop.
AHIGH-levelonpin ENLselectstheloopmode.Bydefault
pin ENL is pulled at LOW-level by a 25 k
pull-down
resistor.
Power supply connections
Three separate supply domains [labelled V
CC(B)
, V
CC(G)
and V
CC(R)
] are used to provide isolation between the
high-current outputs, the PECL or CML inputs, and the
monitor photodiode current input. The three domains
should be individually filtered before being connected to a
central V
CC
(see Figs 6 and 7).
All supply pins need to
be connected.
The supply levels should be equal and in
accordance with the values specified in
Chapter “Characteristics”.
I
ALARMLO
1500
300
20
μ
A
=
=
I
ALARMHI
90 mA
60
μ
A
=
=
R
ALARMHI
1500
1.5 V
25 k
=
=
R
ALARMLO
300
1.56 mA
75 k
=
=
To maximize power supply isolation, the MPD cathode on
the laser should be connected to V
CC(G)
and the laser
diode anode to V
CC(B)
. It is recommended to provide the
laser anode with a separate decoupling capacitor C11.
The inverted laser driver modulation pin LAQ is generally
not used. To properly balance the output stage, an
equalizationnetwork Z1withanimpedancecomparableto
the laser is connected between pin LAQ and V
CC(B)
.
All external components should be SMD, preferably of
size 0603 or smaller. The components must be mounted
as close to the IC as possible. It is specially recommended
to mount the following components very close to the IC:
Power supply decoupling capacitors C2, C4 and C6
Input matching network on pins DIN and DINQ
Capacitor C7 on pin MONIN
Output matching network Z1 at the unused output.
Grounding bare die
In addition to the separate V
CC
domains, the bare die
contains three corresponding ground domains. Isolation
between the GND domains is limited due to the finite
substrate conductance.
Mount the die on a, preferably large and highly conductive,
grounded die pad.
All pads GND have to be bonded to
the die pad.
The external ground is thus optimally
combined with the die ground, avoiding ground bouncing
problems.
Layout recommendations
Layout recommendations for the TZA3001AHL and
TZA3001BHL can be found in application note “AN98090
Fiber optic transceiverboard STM1/4/8, OC3,12,24,
FC/GE”
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| TZA3004 | SDH/SONET STM1/OC3 and STM4/OC12 transceiver |
| TZA3004HL | SDH/SONET data and clock recovery unit STM1/4 OC3/12 |
| X00602 | SENSITIVE GATE SCR |
| X00602MA | 0.8A SCRs |
| X00602MA1AA2 | 0.8A SCRs |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| TZA3004 | 制造商:PHILIPS 制造商全稱:NXP Semiconductors 功能描述:SDH/SONET STM1/OC3 and STM4/OC12 transceiver |
| TZA3004HL | 制造商:PHILIPS 制造商全稱:NXP Semiconductors 功能描述:SDH/SONET data and clock recovery unit STM1/4 OC3/12 |
| TZA3005 | 制造商:PHILIPS 制造商全稱:NXP Semiconductors 功能描述:SDH/SONET STM1/OC3 and STM4/OC12 transceiver |
| TZA3005H | 制造商:PHILIPS 制造商全稱:NXP Semiconductors 功能描述:SDH/SONET STM1/OC3 and STM4/OC12 transceiver |
| TZA3011A | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:30 Mbits/s up to 3.2 Gbits/s A-rate(TM) laser drivers |
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