LTC4258 datasheet(6/28 Pages) LINER | Quad IEEE 802.3af Power over Ethernet Controller with Integrated Detection

6 page

LTC4258

4258p

Figure 8. Reading the Interrupt Register (Short Form)

Figure 6. Writing to a Register

Figure 7. Reading from a Register

Figure 9. Reading from Alert Response Address

TI I G DIAGRA S

SCL

SDA

4258 F06

AD3 AD2 AD1 AD0

R/W ACK

ACK

START BY

MASTER

ACK BY

SLAVE

ACK BY

SLAVE

ACK BY

SLAVE

FRAME 1

SERIAL BUS ADDRESS BYTE

FRAME 2

FRAME 3

DATA BYTE

STOP BY

MASTER

SCL

SDA

AD3 AD2 AD1 AD0

R/W ACK

ACK

AD3 AD2 AD1 AD0

R/W ACK

ACK

START BY

MASTER

ACK BY

SLAVE

ACK BY

SLAVE

4258 F07

STOP BY

MASTER

REPEATED

START BY

MASTER

ACK BY

SLAVE

NO ACK BY

MASTER

FRAME 1

SERIAL BUS ADDRESS BYTE

FRAME 2

FRAME 1

SERIAL BUS ADDRESS BYTE

FRAME 2

DATA BYTE

SCL

SDA

4258 F08

AD3 AD2 AD1 AD0

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

4258 F09

AD3

AD2 AD1 AD0

R/W ACK

ACK

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

Part Number	Components Description	Html View	Manufacturer
LTC4259A	Quad IEEE 802.3af Power over Ethernet Controller with AC Disconnect	1 2 3 4 5 More	Linear Technology
LTC4267	Power over Ethernet IEEE 802.3af PD Interface with Integrated Switching Regulator	1 2 3 4 5 More	Linear Technology
LM5072	Integrated 100V Power Over Ethernet PD Interface and PWM Controller with Aux Support	1 2 3 4 5 More	National Semiconductor
0873-2X8R-66	INTEGRATED CONNECTOR MODULES Power over Ethernet MagJack® with LEDs 2 x 8	1 2 3 4 5	Bel Fuse Inc.
0873-2X6R-66	INTEGRATED CONNECTOR MODULES Power over Ethernet MagJack with LEDs 2 x 6	1 2 3 4 5	Bel Fuse Inc.
0864-2X6R-55	INTEGRATED CONNECTOR MODULES Power over Ethernet MagJack® 2 x 6 with LEDs	1 2 3 4 5	Bel Fuse Inc.
LTC4257-1	Power over Ethernet Interface Controller with Dual Current Limit	1 2 3 4 5 More	Linear Technology
LM5071	Power Over Ethernet PD Controller with Auxiliary Power Power Over Ethernet PD Controller with Auxiliary Power	1 2 3 4 5 More	National Semiconductor
LM5070	Integrated Power Over Ethernet PD Interface and PWM Controller	1 2 3 4 5 More	National Semiconductor
0826-1X1T-80	INTEGRATED CONNECTOR MODULES Power over Ethernet MagJack® with LEDs	1 2 3	Bel Fuse Inc.

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