參數(shù)資料
型號: LTC4257CS8
廠商: Linear Technology
文件頁數(shù): 19/20頁
文件大?。?/td> 263K
描述: IC CTRLR INTFACE PWR/ETHER 8SOIC
標準包裝: 100
類型: 以太網供電開關(PoE)
應用: IP 電話,LAN 網絡供電,網絡路由器和交換機
內部開關:
電流限制: 350mA
工作溫度: 0°C ~ 70°C
安裝類型: 表面貼裝
封裝/外殼: 8-SOIC(0.154",3.90mm 寬)
供應商設備封裝: 8-SOIC
包裝: 管件
產品目錄頁面: 1338 (CN2011-ZH PDF)
LTC4257
19
4257fb
S8 Package
8-Lead Plastic Small Outline (Narrow .150 Inch)
(Reference LTC DWG # 05-08-1610)
PACKAGE DESCRIPTIO
Information furnished by Linear Technology Corporation is believed to be accurate and reliable.
However, no responsibility is assumed for its use. Linear Technology Corporation makes no represen-
tation that the interconnection of its circuits as described herein will not infringe on existing patent rights.
DD Package
8-Lead Plastic DFN (3mm ?/SPAN> 3mm)
(Reference LTC DWG # 05-08-1698)
.016  .050
(0.406  1.270)
.010  .020
(0.254  0.508)
?45?/DIV>
0? 8?TYP
.008  .010
(0.203  0.254)
SO8 0303
.053  .069
(1.346  1.752)
.014  .019
(0.355  0.483)
TYP
.004  .010
(0.101  0.254)
.050
(1.270)
BSC
1
2
3
4
.150  .157
(3.810  3.988)
NOTE 3
8
7
6
5
.189  .197
(4.801  5.004)
NOTE 3
.228  .244
(5.791  6.197)
.245
MIN
.160 ?005
RECOMMENDED SOLDER PAD LAYOUT
.045 ?005
.050 BSC
.030 ?005
 TYP
INCHES
(MILLIMETERS)
NOTE:
1. DIMENSIONS IN
2. DRAWING NOT TO SCALE
3. THESE DIMENSIONS DO NOT INCLUDE MOLD FLASH OR PROTRUSIONS.
  MOLD FLASH OR PROTRUSIONS SHALL NOT EXCEED .006" (0.15mm)
3.00 ?.10
(4 SIDES)
NOTE:
1. DRAWING TO BE MADE A JEDEC PACKAGE OUTLINE M0-229 VARIATION OF (WEED-1)
2. DRAWING NOT TO SCALE
3. ALL DIMENSIONS ARE IN MILLIMETERS
4. DIMENSIONS OF EXPOSED PAD ON BOTTOM OF PACKAGE DO NOT INCLUDE
  MOLD FLASH. MOLD FLASH, IF PRESENT, SHALL NOT EXCEED 0.15mm ON ANY SIDE
5. EXPOSED PAD SHALL BE SOLDER PLATED
6. SHADED AREA IS ONLY A REFERENCE FOR PIN 1 LOCATION
ON TOP AND BOTTOM OF PACKAGE
0.38 ?0.10
BOTTOM VIEWEXPOSED PAD
1.65 ?0.10
(2 SIDES)
0.75 ?.05
R = 0.115
TYP
2.38 ?.10
(2 SIDES)
1
4
8
5
PIN 1
TOP MARK
(NOTE 6)
0.200 REF
0.00  0.05
(DD8) DFN 1203
0.25 ?0.05
2.38 ?.05
(2 SIDES)
RECOMMENDED SOLDER PAD PITCH AND DIMENSIONS
1.65 ?.05
(2 SIDES)
2.15 ?.05
0.50
BSC
0.675 ?.05
3.5 ?.05
PACKAGE
OUTLINE
0.25 ?0.05
0.50 BSC
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