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| 型號： | SY89854UMY |
| 廠商： | Micrel Inc |
| 文件頁數(shù)： | 10/11頁 |
| 文件大小： | 0K |
| 描述： | IC CLK BUFFER TRANSLA 1:4 16-MLF |
| 標準包裝： | 300 |
| 系列： | Precision Edge® |
| 類型： | 扇出緩沖器（分配），變換器 |
| 電路數(shù)： | 1 |
| 比率 - 輸入:輸出： | 1:4 |
| 差分 - 輸入:輸出： | 是/是 |
| 輸入： | CML，LVDS，PECL |
| 輸出： | LVPECL |
| 頻率 - 最大： | 3.5GHz |
| 電源電壓： | 2.375 V ~ 3.6 V |
| 工作溫度： | -40°C ~ 85°C |
| 安裝類型： | 表面貼裝 |
| 封裝/外殼： | 16-VFQFN 裸露焊盤，16-MLF? |
| 供應商設備封裝： | 16-MLF?（3x3） |
| 包裝： | 管件 |
Micrel, Inc.
SY88353BL
February 2007
8
M9999-021707-B
hbwhelp@micrel.com or (408) 955-1690
Functional Block Diagram
Detailed Description
The SY88353L limiting post amplifier operates from a
single +3.3V power supply, over temperatures from
–40°C to +85°C. Signals with data rates from 155Mbps
up to 3.2Gbps, and as small as 10mVpp, can be
amplified. Figure 1 shows the allowed input voltage
swing. The SY88353L generates a LOS output that can
be feedback to /EN for output stability in the absence of
a signal at the input. LOSLVL sets the sensitivity of the
input amplitude detection. The amplifier features a
signal crossing adjustment for BER optimization in
optical links using optical amplifiers such in WDM
applications.
Input Amplifier/Buffer
Figure 2 shows a simplified schematic of the input
stage. The input amplifier allows signals as small as
10mVpp to be detected and amplified. The input amplifier
allows input signals as large as 1800mVpp. Input signals
are linearly amplified with a typical 38dB differential
voltage gain. Since it is a limiting amplifier, the
SY88353BL outputs typically 800mVpp voltage-limited
waveforms for input signals that are greater than
12mVpp. Applications requiring the SY88353L to operate
with high gain should have the upstream TIA placed as
close as possible to the SY88353BL’s input pins to
ensure the best performance of the device.
Output Buffer
The SY88353BL’s CML output buffer is designed to
drive 50 lines and is internally terminated with 50 to
VCC. Figure 3 shows a simplified schematic of the output
stage.
Loss-of-Signal
The SY88353L generates a chatter-free loss-of-signal
(LOS) open-collector, TTL output, as shown in Figure 4.
LOS is used to determine if the input amplitude is too
small to be considered a valid input. LOS asserts high if
the input amplitude falls below the threshold set by
LOSLVL and de-asserts low otherwise. LOS can be fed
back to the enable (/EN) input to maintain output
stability under a loss of signal condition. /EN de-asserts
low the true output signal without removing the input
signals. Typically, 3.3dB LOS hysteresis is provided to
prevent chattering.
Loss-of-Signal-Level Set
A programmable LOS level set pin (LOSLVL) sets the
threshold of the input amplitude detection. Connecting
an external resistor between VCC and LOSLVL sets the
voltage at LOSLVL. This voltage ranges from VCC to VCC-
1.3V. The external resistor creates a voltage divider
between VCC and VCC-1.3V, as shown in Figure 5.
Hysteresis
The SY88353L typically provides 3.3dB LOS electrical
hysteresis, which is defined as 20log (VINLOS-De-assert/
VINLOS-Assert). Since the relationship between the voltage
out of the ROSA and optical power at its input is linear,
the optical hysteresis will be typically half of the
electrical hysteresis reported in the datasheet. In
practice, the ratio between electrical and optical
hysteresis is found to be within the range 1.5 to 1.8dB.
Thus, 3.3dB electrical hysteresis will correspond to an
optical hysteresis within the range 1.8 to 2.2dB.
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相關代理商/技術(shù)參數(shù) |
參數(shù)描述 |
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| SY89854UMY TR | 功能描述:IC CLK BUFFER TRANSLA 1:4 16-MLF RoHS:是 類別:集成電路 (IC) >> 時鐘/計時 - 時鐘緩沖器，驅(qū)動器 系列:Precision Edge® 標準包裝:1 系列:HiPerClockS™ 類型:扇出緩沖器（分配），多路復用器 電路數(shù):1 比率 - 輸入:輸出:2:18 差分 - 輸入:輸出:是/無 輸入:CML，LVCMOS，LVPECL，LVTTL，SSTL 輸出:LVCMOS，LVTTL 頻率 - 最大:250MHz 電源電壓:2.375 V ~ 3.465 V 工作溫度:0°C ~ 70°C 安裝類型:表面貼裝 封裝/外殼:32-LQFP 供應商設備封裝:32-TQFP（7x7） 包裝:- 其它名稱:800-1923-6 |
| SY89855U | 制造商:MICREL 制造商全稱:Micrel Semiconductor 功能描述:Precision Low Power Differential LVPECL 4:1 MUX with 1:2 Fanout and Internal Termination |
| SY89855U_10 | 制造商:MICREL 制造商全稱:Micrel Semiconductor 功能描述:Precision Low Power Differential LVPECL 4:1 |
| SY89855UMG | 功能描述:編碼器、解碼器、復用器和解復用器 Low Power, Precision 4:1 LVPECL MUX (I Temp, Green) RoHS:否 制造商:Micrel 產(chǎn)品:Multiplexers 邏輯系列:CMOS 位數(shù): 線路數(shù)量（輸入/輸出）:2 / 12 傳播延遲時間:350 ps, 400 ps 電源電壓-最大:2.625 V, 3.6 V 電源電壓-最小:2.375 V, 3 V 最大工作溫度:+ 85 C 安裝風格:SMD/SMT 封裝 / 箱體:QFN-44 封裝:Tray |
| SY89855UMG TR | 功能描述:編碼器、解碼器、復用器和解復用器 Low Power, Precision 4:1 LVPECL MUX (I Temp, Green) RoHS:否 制造商:Micrel 產(chǎn)品:Multiplexers 邏輯系列:CMOS 位數(shù): 線路數(shù)量（輸入/輸出）:2 / 12 傳播延遲時間:350 ps, 400 ps 電源電壓-最大:2.625 V, 3.6 V 電源電壓-最小:2.375 V, 3 V 最大工作溫度:+ 85 C 安裝風格:SMD/SMT 封裝 / 箱體:QFN-44 封裝:Tray |
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