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LTC4270BIUKG#PBF

P1-P3P4-P6P7-P9P10-P12P13-P15P16-P18P19-P21P22-P24P25-P27P28-P30P31-P32
LTC4270/LTC4271
10
42701fd
For more information www.linear.com/LTC4270
TEST TIMING DIAGRAMS
V
PORTn
INT
V
OC
V
EE
t
DET
t
ME
t
MEL
V
MARK
V
CLASS
15.5V
20.5V
t
CLE
t
CLE
t
CLEON
PD
CONNECTED
0V
42701 F01
FORCED-CURRENT
CLASSIFICATION
t
PON
FORCED-
VOLTAGE
Figure 1. Detect, Class and Turn-On Timing in AUTO Pin or Semi-auto Modes
V
LIM
V
CUT
0V
V
SENSEn
TO V
EE
INT
42701 F02
t
START
, t
CUT
V
MIN
V
SENSEn
TO V
EE
INT
t
DIS
t
MPS
42701 F03
Figure 2. Current Limit Timing
Figure 3. DC Disconnect Timing
LTC4270/LTC4271
11
42701fd
For more information www.linear.com/LTC4270
TEST TIMING DIAGRAMS
V
GATEn
V
EE
MSD
t
MSD
42701 F04
SCL
SDA
t
1
t
2
t
3
t
r
t
f
t
5
t
6
t
7
t
8
t
4
42701 F05
Figure 4. Shut Down Delay Timing
Figure 5. I
2
C Interface Timing
LTC4270/LTC4271
12
42701fd
For more information www.linear.com/LTC4270
I
2
C TIMING DIAGRAMS
SCL
SDA
42701 F06
AD6 01
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
AD6 01
AD3 AD2 AD1 AD0 A7 A6 A5 A4 A3 A2 A1 A0
R/W
ACK
ACK
01
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
42701 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
AD6
SCL
SDA
42701 F08
AD6 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
42701 F09
0 0 110
AD30AD600 1 AD2 AD1 AD0
R/W
ACK
ACK1
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
Figure 6. Writing to a Register
Figure 7. Reading from a Register
Figure 8. Reading the Interrupt Register (Short Form)
Figure 9. Reading from Alert Response Address
P1-P3P4-P6P7-P9P10-P12P13-P15P16-P18P19-P21P22-P24P25-P27P28-P30P31-P32

LTC4270BIUKG#PBF

Mfr. #:
Buy LTC4270BIUKG#PBF
Manufacturer:
Analog Devices Inc.
Description:
Power Switch ICs - POE / LAN PoE+ 25.5W 12-Port PSE Controller (Ethernet interface)
Lifecycle:
New from this manufacturer.
Delivery:
DHL FedEx Ups TNT EMS
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