參數資料
| 型號： | SY88149NDLMG TR |
| 廠商： | Micrel Inc |
| 文件頁數： | 1/13頁 |
| 文件大小： | 0K |
| 描述： | IC LIMITING AMP 1.25GBPS 16QFN |
| 特色產品： | SY88149NDL Limiting Post Amplifier |
| 標準包裝： | 1 |
| 類型： | 限幅后置放大器 |
| 應用： | 光纖學網絡 |
| 安裝類型： | 表面貼裝 |
| 封裝/外殼： | 16-VFQFN 裸露焊盤 |
| 供應商設備封裝： | 16-QFN（3x3） |
| 包裝： | 標準包裝 |
| 其它名稱： | 576-4003-6 |
SY88149NDL
1.25Gbps Burst-Mode Limiting Amplifier
with Ultra-Fast Signal Assert Timing
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 2012
M9999-020712-A
hbwhelp@micrel.com or (408) 955-1690
General Description
The SY88149NDL is a high-sensitivity, burst-mode
capable limiting post amplifier designed for Optical Line
Terminal (OLT) receiver applications. The SY88149NDL
satisfies the strict timing restrictions of the GPON
standards by providing ultra-fast Loss-of-Signal (LOS) or
Signal-Detect (SD) output. Auto Reset and Manual Reset
options are provided to control LOS/SD output timing. For
increased flexibility, this device also includes an option to
select between LOS or SD output. The device can be
connected
to
burst-mode
capable
transimpedance
amplifiers (TIAs) using AC or DC coupling.
The SY88149NDL generates a high-gain LOS or SD
LVTTL output. A programmable LOS/SD level set pin
(LOS/SDLVL) sets the sensitivity of the input amplitude
detection. When LOS/SD SEL pin is left open or tied to
Vcc, JAM is active high, SD is selected and asserts high if
the input amplitude rises above the threshold sets by
LOS/SDLVL and de-asserts low otherwise. When LOS/SD
SEL pin is set low or tied to GND, JAM is active low, LOS
is selected and asserts low if the input amplitude rises
above the threshold sets by LOS/SDLVL and de-asserts
high otherwise. The LOS/SD output can be fed back to the
JAM input to maintain output stability under an invalid
signal conditions. Typically, 4–5 dB SD hysteresis is
provided to prevent chattering.
The SY88149NDL also features a selectable proprietary
Noise Discriminator that aids by filtering out input signals
that do not qualify as a 1.25Gbps GPON preamble signal
in the initial startup phase. This feature minimizes false SD
Asserts that can be triggered by random noise.
The SY88149NDL operates from a single +3.3V power
supply, over temperatures ranging from –40
oC to +85oC.
With its wide bandwidth and high gain, signals up to
1.25Gbps and as small as 5mVpp can be amplified to
drive devices with LVPECL inputs.
All support documentation can be found on Micrel’s web
site at: www.micrel.com.
Features
<5ns SD Assert (LOS Deassert) time
Option to AUTO RESET or manual RESET LOS/SD
output
Selectable LOS/SD output option
High-sensitivity LOS/SD signal detect
Low-noise LVPECL data outputs
Squelching function to maintain output stability
Programmable LOS/SD level set (LOS/SDLVL)
5mVpp input sensitivity
1.25Gbps operation
Single 3.3V power supply
Available in a 16-pin (3mm × 3mm) QFN package
Applications
GE-PON/GPON OLT
Gigabit Ethernet
Fibre Channel
OC-3/12/24 SONET/SDH
High-gain line driver and line receiver
Low-gain TIA interface
Markets
FTTH PON
Datacom/Telecom
Optical transceiver
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