RX – 6 RX + 3 " />
參數(shù)資料
型號(hào)： LTC4264IDE#PBF
廠商： Linear Technology
文件頁(yè)數(shù)： 2/24頁(yè)
文件大小： 0K
描述： IC CNTRLR PD INTERFACE 12-DFN
產(chǎn)品培訓(xùn)模塊： Power over Ethernet
標(biāo)準(zhǔn)包裝： 91
控制器類型： 以太網(wǎng)供電控制器（POE）
接口： IEEE 802.3af
電流 - 電源： 3mA
工作溫度： -40°C ~ 85°C
安裝類型： 表面貼裝
封裝/外殼： 12-WFDFN 裸露焊盤
供應(yīng)商設(shè)備封裝： 12-DFN（4x3）
包裝： 管件
LTC4264
10
4264f
APPLICATIONS INFORMATION
RX –
6
RX +
3
TX –
2
TX +
RJ45
T1
POWERED
DEVICE (PD)
INTERFACE
AS DEFINED
BY IEEE 802.3af
4264 F04
1
7
8
5
4
SPARE –
SPARE+
TO PHY
BR2
0.1
F
100V
BR1
GND
D3
LTC4264
VIN
Figure 4. PD Front End Using Diode Bridges on Main and Spare Inputs
pin high will reduce the signature resistor to 10k which is
an invalid signature per the IEEE 802.3af specications.
This will prevent a PSE from detecting and powering the
PD. This invalid signature is present in the PSE probing
range of –2.8V to –10V. When the input rises above –10V,
the signature resistor reverts to 25k to minimize power
dissipation in the LTC4264. To disable the signature, tie
SHDN to GND. Alternately, the SHDN pin can be driven
high with respect to VIN. When SHDN is high, all functions
are disabled. For normal operation tie SHDN to VIN.
CLASSIFICATION
Once the PSE has detected a PD, the PSE may option-
ally classify the PD. Classication provides a method for
more efcient allocation of power by allowing the PSE
to identify lower-power PDs and assign the appropriate
power level to these devices. For each class, there is an
associated load current that the PD asserts onto the line
during classication probing. The PSE measures the PD
load current in order to assign the proper PD classica-
tion. Class 0 is included in the IEEE 802.3af specication
to cover PDs that do not support classication. Class 1-3
partition PDs into three distinct power ranges as shown in
Table 2. Class 4 is reserved by the IEEE 802.3af committee
for future use. The new Class 5 dened here is available
for system vendors to implement a unique classication
for use in closed systems and is not dened or supported
by the IEEE 802.3af. With the extended classication
range available in the LTC4264, it is possible for system
designers to dene multiple classes using load currents
between 40mA and 75mA.
GND
VIN
SHDN
LTC4264
SIGNATURE DISABLE
4264 F05
25k SIGNATURE
RESISTOR
16k
TO
PSE
Figure 5. 25k Signature Resistor with Disable
相關(guān)PDF資料
PDF描述
PIC16F722-E/MV IC MCU 8BIT 3.5KB FLASH 28UQFN
PIC16LF722-E/ML IC PIC MCU FLASH 3.5KB 28-QFN
PIC16F689-E/SS IC PIC MCU FLASH 4KX14 20SSOP
PIC16F685-E/SS IC PIC MCU FLASH 4KX14 20SSOP
KSZ8895RQI IC 10/100-T 5 PORT SW 128PQFP
相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
LTC4265 制造商:LINER 制造商全稱:Linear Technology 功能描述:Quad IEEE 802.3at Power over Ethernet Controller
LTC4265CDE#PBF 功能描述:IC CTRLR PD INTERFACE HP 12-DFN RoHS:是 類別:集成電路 (IC) >> PMIC - 熱交換 系列:- 標(biāo)準(zhǔn)包裝:50 系列:- 類型:熱交換控制器 應(yīng)用:-48V 遠(yuǎn)程電力系統(tǒng)，AdvancedTCA ? 系統(tǒng)，高可用性 內(nèi)部開(kāi)關(guān):無(wú) 電流限制:可調(diào) 電源電壓:11.5 V ~ 14.5 V 工作溫度:-40°C ~ 85°C 安裝類型:表面貼裝 封裝/外殼:10-TFSOP，10-MSOP（0.118"，3.00mm 寬） 供應(yīng)商設(shè)備封裝:10-MSOP 包裝:管件
LTC4265CDE#TRPBF 功能描述:IC CTRLR PD INTERFACE HP 12-DFN RoHS:是 類別:集成電路 (IC) >> PMIC - 熱交換 系列:- 標(biāo)準(zhǔn)包裝:50 系列:- 類型:熱交換控制器 應(yīng)用:-48V 遠(yuǎn)程電力系統(tǒng)，AdvancedTCA ? 系統(tǒng)，高可用性 內(nèi)部開(kāi)關(guān):無(wú) 電流限制:可調(diào) 電源電壓:11.5 V ~ 14.5 V 工作溫度:-40°C ~ 85°C 安裝類型:表面貼裝 封裝/外殼:10-TFSOP，10-MSOP（0.118"，3.00mm 寬） 供應(yīng)商設(shè)備封裝:10-MSOP 包裝:管件
LTC4265CDE-PBF 制造商:LINER 制造商全稱:Linear Technology 功能描述:IEEE 802.3at High Power PD Interface Controller with 2-Event Classifi cation Recognition
LTC4265CDE-TRPBF 制造商:LINER 制造商全稱:Linear Technology 功能描述:IEEE 802.3at High Power PD Interface Controller with 2-Event Classifi cation Recognition
發(fā)布緊急采購(gòu)，3分鐘左右您將得到回復(fù)。

采購(gòu)需求

(若只采購(gòu)一條型號(hào)，填寫一行即可)

發(fā)布成功！您可以繼續(xù)發(fā)布采購(gòu)。也可以進(jìn)入我的后臺(tái)，查看報(bào)價(jià)

發(fā)布成功！您可以繼續(xù)發(fā)布采購(gòu)。也可以進(jìn)入我的后臺(tái)，查看報(bào)價(jià)

*型號(hào) *數(shù)量 廠商 批號(hào) 封裝
添加更多采購(gòu)

我的聯(lián)系方式

*
*
*