Instrukcja obsługi Microchip SY88933AL


Przeczytaj poniżej 📖 instrukcję obsługi w języku polskim dla Microchip SY88933AL (9 stron) w kategorii nieskategoryzowany. Ta instrukcja była pomocna dla 9 osób i została oceniona przez 2 użytkowników na średnio 4.5 gwiazdek

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SY88933AL
3.3V, 1.25Gbps PECL High-Sensitivity
Limiting Post Amplifier w/TTL Signal Detect
MLF and MicroLeadFrame are registered trademarks of Amkor Technology.
Micrel Inc. • 2180 Fortune Drive • San Jose, CA 95131 • USA • tel +1 (408) 944-0800 • fax + 1 (408) 474-1000 • http://www.micrel.com
February 2007
M9999-021207-B
hbwhelp@micrel.com or (408) 955-1690
General Description
The SY88933AL high-sensitivity limiting post amplifier
is designed for use in fiber-optic receivers. The device
connects to typical transimpedance amplifiers (TIAs).
The linear signal output from TIAs can contain
significant amounts of noise and may vary in amplitude
over time. The SY88933AL quantizes these signals
and outputs PECL level waveforms.
The SY88933AL operates from a single +3.3V power
supply, over temperatures ranging from –40
o
C to
+85
o
C. With its wide bandwidth and high gain, signal
with data rates up to 1.25Gbps and as small as 5mV
PP
can be amplified to drive devices with PECL inputs.
The SY88933AL generates a high gain signal-detect
(SD) open-collector TTL output. The SD function has a
high gain input stage for increased sensitivity. A
programmable signal-detect level set pin (SD
LVL
) sets
the sensitivity of the input amplitude detection. SD
asserts high if the input amplitude rises above the
threshold set by SD
LVL
and de-asserts low otherwise.
The enable input (EN) de-asserts the true output signal
without removing the input signal. The SD output can
be fed back to the EN input to maintain output stability
under a loss-of-signal condition. Typically, 3.4dB SD
hysteresis is provided to prevent chattering.
All support documentation can be found on Micrel’s
web site at: www.micrel.com.
Features
Single 3.3V power supply
DC-to-1.25Gbps operation
Low-noise PECL data outputs
High gain SD
Chatter-free open-collector TTL signal detect (SD)
output with internal 4.75k pull-up resistor
TTL EN input
Programmable SD level set (SD
LVL
)
Available in a tiny 10-pin MSOP package
Pin-compatible with SY88933V
Applications
GPON/BPON/EPON/GEPON
Gigabit Ethernet
531Mbps and 1062Mbps Fibre Channel
OC-3 and OC-12 SONET/SDH
High-gain line driver and line receiver
Low-gain TIA interface
Markets
FTTX
Optical transceiver
Datacom/telecom
Micrel, Inc. SY88933AL
February 2007
2 M9999-021207-B
hbwhelp@micrel.com or (408) 955-1690
Typical Application Circuit
Micrel, Inc. SY88933AL
February 2007
3 M9999-021207-B
hbwhelp@micrel.com or (408) 955-1690
Ordering Information
Part Number Package
Type
Operating
Range
Package Marking Lead
Finish
SY88933ALKG K10-1 Industrial 933A with Pb-Free bar line indicator NiPdAu
Pb-Free
SY88933ALKGTR
(1)
K10-1 Industrial 933A with Pb-Free bar line indicator NiPdAu
Pb-Free
SY88933ALKI K10-1 Industrial 933A SnPb
SY88933ALKITR
(1)
K10-1 Industrial 933A SnPb
Note:
1. Tape and Reel.
Pin Configuration
10-Pin MSOP (K10-1)
Pin Description
Pin Number Pin Name Type Pin Function
1 EN TTL Input: Default is
HIGH.
Enable: This input enables the outputs when it is HIGH. Note that
this input is internally connected to a 25k pull-up resistor and will
default to a logic HIGH state if left open.
2 DIN Data Input True data input.
3 /DIN Data Input Complementary data input.
4 VREF Reference voltage: Placing a capacitor here to V
CC
helps stabilize
SD
LVL
.
5 SDLVL Input Signal-Detect Level Set: a resistor from this pin to V
CC
sets the
threshold for the data input amplitude at which SD will be asserted.
6 GND Ground Device ground.
7 SD Open-collector TTL
output w/internal
4.75k pull-up
resistor
Signal-Detect: asserts high when the data input amplitude rises
above the threshold set by SD
LVL
.
8 /DOUT PECL Output Complementary data output.
9 DOUT PECL Output True data output.
10 VCC Power Supply Positive power supply.


Specyfikacje produktu

Marka: Microchip
Kategoria: nieskategoryzowany
Model: SY88933AL

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