- 您現(xiàn)在的位置：買賣IC網(wǎng) > PDF目錄179919 > LTC4257IS8#PBF (LINEAR TECHNOLOGY CORP) IEEE 802.3af PD Power over Ethernet Interface Controller; Package: SO; No of Pins: 8; Temperature Range: -40°C to +85°C PDF資料下載
參數(shù)資料
| 型號： | LTC4257IS8#PBF |
| 廠商： | LINEAR TECHNOLOGY CORP |
| 元件分類： | 網(wǎng)絡(luò)接口 |
| 英文描述： | IEEE 802.3af PD Power over Ethernet Interface Controller; Package: SO; No of Pins: 8; Temperature Range: -40°C to +85°C |
| 中文描述： | DATACOM, NETWORK INTERFACE SUPPORT CIRCUIT, PDSO8 |
| 封裝： | 0.150 INCH, LEAD FREE, PLASTIC, SOP-8 |
| 文件頁數(shù)： | 9/20頁 |
| 文件大?。?/td> | 258K |
| 代理商： | LTC4257IS8#PBF |
LTC4257
17
4257fb
APPLICATIO S I FOR ATIO
WU
UU
Layout
The LTC4257 is relativity immune to layout problems.
Excessive parasitic capacitance on the RCLASS pin should
be avoided. If using the DD package, include an electrically
isolated heat sink to which the exposed pad on the bottom
of the package can be soldered. For optimal thermal
performance, make the heat sink as large as possible.
Voltages in a PD can be as large as – 57V, so high voltage
layout techniques should be employed.
The load capacitor connected between Pins 5 and 8 of the
LTC4257 can store significant energy when fully charged.
The design of a PD must ensure that this energy is not
inadvertently dissipated in the LTC4257. The polarity-
protection diode(s) prevent an accidental short on the
cable from causing damage. However, if the VIN pin is
shorted to the GND pin inside the PD while the load
capacitor is charged, current will flow through the para-
sitic body diode of the internal MOSFET and may cause
permanent damage to the LTC4257.
Input Surge Suppression
The LTC4257 is specified to operate with an absolute
maximum voltage of – 100V and is designed to tolerate
brief overvoltage events. However, the pins that interface
to the outside world (primarily VIN and GND) can routinely
see peak voltages in excess of 10kV. To protect the
LTC4257, it is highly recommended that a transient volt-
age suppressor be installed between the bridge and the
LTC4257 (D3 in Figure 2).
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| LTC4257IS8#TRPBF | IEEE 802.3af PD Power over Ethernet Interface Controller; Package: SO; No of Pins: 8; Temperature Range: -40°C to +85°C |
| LTC4259ACGW-1#PBF | Quad IEEE 802.3af Power over Ethernet Controller with AC Disconnect; Package: SSOP; No of Pins: 36; Temperature Range: 0°C to +70°C |
| LTC4259ACGW-1#TRPBF | Quad IEEE 802.3af Power over Ethernet Controller with AC Disconnect; Package: SSOP; No of Pins: 36; Temperature Range: 0°C to +70°C |
| LTC4259AIGW-1#PBF | Quad IEEE 802.3af Power over Ethernet Controller with AC Disconnect; Package: SSOP; No of Pins: 36; Temperature Range: -40°C to +85°C |
| LTC4259AIGW-1#TRPBF | Quad IEEE 802.3af Power over Ethernet Controller with AC Disconnect; Package: SSOP; No of Pins: 36; Temperature Range: -40°C to +85°C |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| LTC4258 | 制造商:LINER 制造商全稱:Linear Technology 功能描述:Quad IEEE 802.3at Power over Ethernet Controller |
| LTC4258_09 | 制造商:LINER 制造商全稱:Linear Technology 功能描述:Quad IEEE 802.3af Power over Ethernet Controller with Integrated Detection |
| LTC4258CGW | 制造商:Linear Technology 功能描述:POWER OVER ETHERNET CONTROLLER |
| LTC4258CGW#PBF | 功能描述:IC POE 802.3AF QUAD 36-SSOP RoHS:是 類別:集成電路 (IC) >> 接口 - 控制器 系列:- 標準包裝:2,450 系列:- 控制器類型:SPI 總線至 I²C 總線橋接 接口:I²C，串行，SPI 電源電壓:2.4 V ~ 3.6 V 電流 - 電源:11mA 工作溫度:-40°C ~ 85°C 安裝類型:表面貼裝 封裝/外殼:24-VFQFN 裸露焊盤 供應商設(shè)備封裝:24-HVQFN（4x4） 包裝:托盤 配用:568-3511-ND - DEMO BOARD SPI TO I2C 其它名稱:935286452157SC18IS600IBSSC18IS600IBS-ND |
| LTC4258CGW#TR | 制造商:Linear Technology 功能描述:POWER OVER ETHERNET CONTROLLER |
發(fā)布緊急采購，3分鐘左右您將得到回復。