參數(shù)資料
型號(hào): LTC4274CUHF#PBF
廠商: Linear Technology
文件頁(yè)數(shù): 11/28頁(yè)
文件大?。?/td> 702K
描述: IC CONTROLLER POE 38-QFN
標(biāo)準(zhǔn)包裝: 52
類型: 以太網(wǎng)供電 PSE 控制器(PoE)
應(yīng)用: 供電設(shè)備(PSE)
內(nèi)部開關(guān):
電流限制: 可調(diào)
電源電壓: 3 V ~ 4.3 V
工作溫度: -40°C ~ 85°C
安裝類型: 表面貼裝
封裝/外殼: 38-QFN
供應(yīng)商設(shè)備封裝: 38-QFN(5x7)裸露焊盤
包裝: 管件
LTC4274
11
4274fd
 I
2
C TIMING DIAGRAMS
Figure 6. Writing to a Register
Figure 7. Reading from a Register
SCL
SDA
4274 F06
0
0
1
AD3  AD2  AD1  AD0
A7   A6   A5   A4   A3   A2    A1   A0
R/W  ACK
D7   D6   D5   D4   D3   D2    D1   D0
ACK
ACK
START BY
MASTER
ACK BY
SLAVE
ACK BY
SLAVE
ACK BY
SLAVE
FRAME 1
SERIAL BUS ADDRESS BYTE
FRAME 2
REGISTER ADDRESS BYTE
FRAME 3
DATA BYTE
STOP BY
MASTER
SCL
SDA
0
0
1
AD3  AD2  AD1  AD0
A7   A6   A5   A4   A3   A2    A1   A0
R/W  ACK
ACK
0
0
1
AD3  AD2  AD1  AD0
D7   D6   D5   D4   D3   D2    D1   D0
R/W  ACK
ACK
START BY
MASTER
ACK BY
SLAVE
ACK BY
SLAVE
4274 F07
STOP BY
MASTER
REPEATED
START BY
MASTER
ACK BY
SLAVE
NO ACK BY
MASTER
FRAME 1
SERIAL BUS ADDRESS BYTE
FRAME 2
REGISTER ADDRESS BYTE
FRAME 1
SERIAL BUS ADDRESS BYTE
FRAME 2
DATA BYTE
Figure 8. Reading the Interrupt Register (Short Form)
Figure 9. Reading from Alert Response Address
SCL
SDA
4274 F08
0
1
0   AD3  AD2  AD1  AD0
D7   D6   D5   D4   D3   D2    D1   D0
R/W  ACK
ACK
START BY
MASTER
ACK BY
SLAVE
NO ACK BY
MASTER
FRAME 1
SERIAL BUS ADDRESS BYTE
FRAME 2
DATA BYTE
STOP BY
MASTER
SCL
SDA
4274 F09
0
0
1
1
0
AD3
0
0
0
0
1
AD2  AD1 AD0
R/W  ACK
ACK
1
START BY
MASTER
ACK BY
SLAVE
 NO ACK BY
MASTER
FRAME 1
ALERT RESPONSE ADDRESS BYTE
FRAME 2
SERIAL BUS ADDRESS BYTE
STOP BY
MASTER
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