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參數(shù)資料
| 型號(hào)： | SY87700ALZG |
| 廠商： | Micrel Inc |
| 文件頁(yè)數(shù)： | 8/16頁(yè) |
| 文件大?。?/td> | 0K |
| 描述： | IC CLOCK/DATA RECOVERY 28-SOIC |
| 標(biāo)準(zhǔn)包裝： | 27 |
| 系列： | AnyRate® |
| 類型： | 時(shí)鐘和數(shù)據(jù)恢復(fù)（CDR），多路復(fù)用器 |
| PLL： | 是 |
| 主要目的： | 以太網(wǎng)，SONET/SDH，ATM 應(yīng)用 |
| 輸入： | PECL |
| 輸出： | PECL |
| 電路數(shù)： | 1 |
| 比率 - 輸入:輸出： | 1:3 |
| 差分 - 輸入:輸出： | 是/是 |
| 頻率 - 最大： | 208Mbps |
| 電源電壓： | 3.15 V ~ 3.45 V |
| 工作溫度： | -40°C ~ 85°C |
| 安裝類型： | 表面貼裝 |
| 封裝/外殼： | 28-SOIC（0.295"，7.50mm 寬） |
| 供應(yīng)商設(shè)備封裝： | 28-SOIC |
| 包裝： | 管件 |
| 產(chǎn)品目錄頁(yè)面： | 1089 (CN2011-ZH PDF) |
| 其它名稱： | 576-2057-5 SY87700ALZG-ND |
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MCP7940N
DS25010C-page 16
2011 Microchip Technology Inc.
5.2.4
CRYSTAL SPECS
The MCP7940N has been designed to operate with a
standard 32.768 kHz tuning fork crystal. The on-board
oscillator has been characterized to operate with a
crystal of maximum ESR of 70K Ohms.
Crystals with a comparable specification are also suit-
able for use with the MCP7940N.
The table below is given as design guidance and a
starting point for crystal and capacitor selection.
EQUATION 5-1:
The following must also be taken into consideration:
Pin capacitance (to be included in Cx2 and Cx1)
Stray Board Capacitance
The recommended board layout for the oscillator area
is shown in Figure 5-3. This actual board shows the
crystal and the load capacitors. In this example, C2 is
CX1, C3 is CX2 and the crystal is designated as Y1.
FIGURE 5-3:
BOARD LAYOUT
Gerber files are available from www/microchip.com/
rtcc.
It is required that the final application should be tested
with the chosen crystal and capacitor combinations
across all operating and environmental conditions.
Please also consult with the crystal specification to
observe correct handling and reflow conditions and for
information on ideal capacitor values.
For more information please see application note
AN1365, “RTCC Best Practices” (DS01365).
Manufacturer
Part Number
Crystal
Capacitance
CX1 Value
CX2 Value
Micro Crystal
CM7V-T1A
7pF
10pF
12pF
Citizen
CM200S-32.768KDZB-UT
6pF
10pF
8 pF
Please work with your crystal vendor.
Cload
CX2 CX1
CX2
CX1
+
-----------------------------
Cstray
+
=
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| SY87700ALZG TR | 功能描述:計(jì)時(shí)器和支持產(chǎn)品 3.3V 32Mbps-175Mbps CDR (I Temp, Green/28 pin SOIC/T+R) RoHS:否 制造商:Micrel 類型:Standard 封裝 / 箱體:SOT-23 內(nèi)部定時(shí)器數(shù)量:1 電源電壓-最大:18 V 電源電壓-最小:2.7 V 最大功率耗散: 最大工作溫度:+ 85 C 最小工作溫度:- 40 C 封裝:Reel |
| SY87700L | 制造商:MICREL 制造商全稱:Micrel Semiconductor 功能描述:3.3V 32-175Mbps AnyRate CLOCK AND DATA RECOVERY |
| SY87700L_06 | 制造商:MICREL 制造商全稱:Micrel Semiconductor 功能描述:3.3V 32-175Mbps AnyRate CLOCK AND DATA RECOVERY |
| SY87700LHG | 功能描述:計(jì)時(shí)器和支持產(chǎn)品 3.3V 32Mbps-175Mbps CDR (I Temp, Green/32 pin TQFP/bulk) RoHS:否 制造商:Micrel 類型:Standard 封裝 / 箱體:SOT-23 內(nèi)部定時(shí)器數(shù)量:1 電源電壓-最大:18 V 電源電壓-最小:2.7 V 最大功率耗散: 最大工作溫度:+ 85 C 最小工作溫度:- 40 C 封裝:Reel |
| SY87700LHG TR | 功能描述:計(jì)時(shí)器和支持產(chǎn)品 3.3V 32Mbps-175Mbps CDR (I Temp, Green/32 pin TQFP/T+R) RoHS:否 制造商:Micrel 類型:Standard 封裝 / 箱體:SOT-23 內(nèi)部定時(shí)器數(shù)量:1 電源電壓-最大:18 V 電源電壓-最小:2.7 V 最大功率耗散: 最大工作溫度:+ 85 C 最小工作溫度:- 40 C 封裝:Reel |
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