LTC4258 LINER [Linear Technology], LTC4258 Datasheet - Page 5

• Manufacturer Part Number: LTC4258
• Description: Quad IEEE 802.3af Power over Ethernet Controller with Integrated Detection
• Manufacturer: LINER [Linear Technology]

TEST TI I G
W U
SDA
SCL
V
V
Figure 2. Detect, Class and Turn-On Timing in Auto or Semiauto Modes
PORT n
GATE n
t
INT
V
1
SENSE n
t
2
V
0V
EE
INSERTED
TO V
V
t
TO V
SENSE n
3
PD
INT
EE
INT
EE
t
V
4
LIM
0V
Figure 4. DC Disconnect Timing
Figure 3. Current Limit Timing
Figure 5. I
t
t
5
DETDLY
V
MIN
t
DET
t
r
t
CLSDLY
2
t
C Interface Timing
f
t
VMIN
V
t
6
V
CLASS
CUT
t
PON
t
DIS
t
START
t
7
t
4258 F03
CLASS
, t
V
T
ICUT
4258 F04
4258 F02
PORT
TURN ON
(AUTO MODE)
t
4258 F05
8
LTC4258
4258p
5