参数资料
| 型号： | SY89854UMI |
| 厂商： | Micrel Inc |
| 文件页数： | 10/11页 |
| 文件大小： | 0K |
| 描述： | IC CLK BUFFER TRANSLA 1:4 16-MLF |
| 标准包装： | 300 |
| 系列： | Precision Edge® |
| 类型： | 扇出缓冲器（分配），变换器 |
| 电路数： | 1 |
| 比率 - 输入:输出： | 1:4 |
| 差分 - 输入:输出： | 是/是 |
| 输入： | CML，LVDS，PECL |
| 输出： | LVPECL |
| 频率 - 最大： | 3.5GHz |
| 电源电压： | 2.375 V ~ 3.6 V |
| 工作温度： | -40°C ~ 85°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 16-VFQFN 裸露焊盘，16-MLF? |
| 供应商设备封装： | 16-MLF?（3x3） |
| 包装： | 托盘 |
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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相关代理商/技术参数 |
参数描述 |
|---|---|
| SY89854UMI TR | 功能描述:IC CLK BUFFER TRANSLA 1:4 16-MLF RoHS:否 类别:集成电路 (IC) >> 时钟/计时 - 时钟缓冲器，驱动器 系列:Precision Edge® 标准包装:1 系列:HiPerClockS™ 类型:扇出缓冲器（分配），多路复用器 电路数:1 比率 - 输入:输出:2:18 差分 - 输入:输出:是/无 输入:CML，LVCMOS，LVPECL，LVTTL，SSTL 输出:LVCMOS，LVTTL 频率 - 最大:250MHz 电源电压:2.375 V ~ 3.465 V 工作温度:0°C ~ 70°C 安装类型:表面贴装 封装/外壳:32-LQFP 供应商设备封装:32-TQFP（7x7） 包装:- 其它名称:800-1923-6 |
| SY89854UMY | 功能描述:IC CLK BUFFER TRANSLA 1:4 16-MLF RoHS:是 类别:集成电路 (IC) >> 时钟/计时 - 时钟缓冲器，驱动器 系列:Precision Edge® 标准包装:1 系列:HiPerClockS™ 类型:扇出缓冲器（分配），多路复用器 电路数:1 比率 - 输入:输出:2:18 差分 - 输入:输出:是/无 输入:CML，LVCMOS，LVPECL，LVTTL，SSTL 输出:LVCMOS，LVTTL 频率 - 最大:250MHz 电源电压:2.375 V ~ 3.465 V 工作温度:0°C ~ 70°C 安装类型:表面贴装 封装/外壳:32-LQFP 供应商设备封装:32-TQFP（7x7） 包装:- 其它名称:800-1923-6 |
| SY89854UMY TR | 功能描述:IC CLK BUFFER TRANSLA 1:4 16-MLF RoHS:是 类别:集成电路 (IC) >> 时钟/计时 - 时钟缓冲器，驱动器 系列:Precision Edge® 标准包装:1 系列:HiPerClockS™ 类型:扇出缓冲器（分配），多路复用器 电路数:1 比率 - 输入:输出:2:18 差分 - 输入:输出:是/无 输入:CML，LVCMOS，LVPECL，LVTTL，SSTL 输出:LVCMOS，LVTTL 频率 - 最大:250MHz 电源电压:2.375 V ~ 3.465 V 工作温度:0°C ~ 70°C 安装类型:表面贴装 封装/外壳:32-LQFP 供应商设备封装:32-TQFP（7x7） 包装:- 其它名称:800-1923-6 |
| SY89855U | 制造商:MICREL 制造商全称: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 制造商全称:Micrel Semiconductor 功能描述:Precision Low Power Differential LVPECL 4:1 |
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