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SY88803VKC PDF预览

SY88803VKC

更新时间： 2024-02-24 04:31:43
品牌 Logo 应用领域
麦瑞 - MICREL ATM集成电路SONET集成电路SDH集成电路电信集成电路电信电路放大器光电二极管瞄准线异步传输模式
页数 文件大小 规格书
8页 60K
描述
3.3V/5V 155Mbps PECL LOW POWER LIMITING POST AMPLIFIER W/TTL LOS

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SY88803VKC 技术参数

是否Rohs认证：不符合生命周期：Obsolete
零件包装代码：MSOP包装说明：TSSOP, TSSOP10,.19,20
针数：10Reach Compliance Code：compliant
HTS代码：8542.39.00.01风险等级：5.42
Is Samacsys：N应用程序：SONET;SDH
JESD-30 代码：S-PDSO-G10JESD-609代码：e0
长度：3 mm湿度敏感等级：1
功能数量：1端子数量：10
最高工作温度：85 °C最低工作温度：-40 °C
封装主体材料：PLASTIC/EPOXY封装代码：TSSOP
封装等效代码：TSSOP10,.19,20封装形状：SQUARE
封装形式：SMALL OUTLINE, THIN PROFILE, SHRINK PITCH峰值回流温度（摄氏度）：240
电源：3.3/5 V认证状态：Not Qualified
座面最大高度：1.1 mm子类别：ATM/SONET/SDH ICs
最大压摆率：0.042 mA标称供电电压：3.3 V
表面贴装：YES技术：BIPOLAR
电信集成电路类型：ATM/SONET/SDH SUPPORT CIRCUIT温度等级：INDUSTRIAL
端子面层：Tin/Lead (Sn/Pb)端子形式：GULL WING
端子节距：0.5 mm端子位置：DUAL
处于峰值回流温度下的最长时间：30宽度：3 mm
Base Number Matches：1

SY88803VKC 数据手册

 浏览型号SY88803VKC的Datasheet PDF文件第2页浏览型号SY88803VKC的Datasheet PDF文件第3页浏览型号SY88803VKC的Datasheet PDF文件第4页浏览型号SY88803VKC的Datasheet PDF文件第6页浏览型号SY88803VKC的Datasheet PDF文件第7页浏览型号SY88803VKC的Datasheet PDF文件第8页 
SY88803V  
Micrel, Inc  
DETAILED DESCRIPTION  
The SY88803V low-power limiting post-amplifier operates Loss-of-Signal Level Set  
from a single +3.3V or +5V power supply, over temperatures  
from –40°C to +85°C. Signals with data rates up to 155Mbps  
A programmable loss-of-signal level set pin (LOS ) sets  
the threshold of the input amplitude detection. Setting a  
LVL  
and as small as 5mV can be amplified. Figure 1 shows  
voltage on LOS  
between V  
and V  
sets this  
PP  
LVL  
CC  
REF  
the allowed input voltage swing. The SY88803V generates  
threshold. If desired, a resistor divider between V  
and  
CC  
an LOS output. LOS  
amplitude detection.  
sets the sensitivity of the input  
V
, as shown in Figure 5, also creates this threshold.  
LVL  
REF  
The smaller the voltage difference from LOS  
to V , the  
LVL  
CC  
smaller the LOS sensitivity. Hence, larger input amplitude is  
required to deassert LOS. “Typical Operating Characteristics”  
shows the relationship between the input amplitude detection  
Input Amplifier/Buffer  
Figure 2 shows a simplified schematic of the SY88803V's  
input stage. The high-sensitivity of the input amplifier allows  
signals as small as 5mV  
sensitivity and the LOS  
voltage.  
LVL  
to be detected and amplified.  
PP  
The input amplifier allows input signals as large as Hysteresis  
1800mV . Input signals are linearly amplified with a typically  
38dB differential voltage gain. Since it is a limiting amplifier,  
The SY88803V provides typically 4.6dB LOS electrical  
hysteresis. By definition, a power ratio measured in dB is  
PP  
the SY88803V outputs typically 1500mV voltage-limited  
2
10log(power ratio). Power is calculated as V /R for an  
PP  
IN  
waveforms for input signals that are greater than 18mV  
.
electrical signal. Hence the same ratio can be stated as  
20log(voltage ratio). While in linear mode, the electrical  
voltage input changes linearly with the optical power and  
hence the ratios change linearly. Therefore, the optical  
hysteresis in dB is half the electrical hysteresis in dB given  
in the datasheet. The SY88803V provides typically 2.3dB  
LOS optical hysteresis. As the SY88803V is an electrical  
device, this datasheet refers to hysteresis in electrical terms.  
With 6dB LOS hysteresis, a voltage factor of two is required  
to assert or deassert LOS.  
PP  
Applications requiring the SY88803V to operate with high-  
gain should have the upstream TIA placed as close as  
possible to the SY88803V’s input pins to ensure the best  
performance of the device.  
Output Buffer  
The SY88803V’s PECL output buffer is designed to drive  
50Ω lines. The output buffer requires appropriate termination  
for proper operation. An external 50Ω resistor to V –2V  
CC  
for each output pin provides this. Figure 3 shows a simplified  
schematic of the output stage and includes an appropriate  
termination method.  
Loss-of-Signal  
The SY88803V generates a chatter-free TTL LOS. A  
recommended 2.5kΩ pullup resistor to V  
is required for  
CC  
proper operation, as shown in Figure 4. LOS is used to  
determine that 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 LOS  
and  
LVL  
deasserts low otherwise. LOS can be fed back to the enable  
(/EN) input to maintain output stability under a loss of signal  
condition. /EN deasserts the true output signal without  
removing the input signals. Typically 4.6dB LOS hysteresis  
is provided to prevent chattering.  
M9999-051706  
hbwhelp@micrel.com or (408) 955-1690  
5
12345678

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