參數(shù)資料
型號： LTC4258CGW#TRPBF
廠商： Linear Technology
文件頁數(shù)： 28/28頁
文件大?。?/td> 0K
描述： IC POE 802.3AF QUAD 36-SSOP
標準包裝： 1,000
控制器類型： 以太網(wǎng)供電控制器（POE）
接口： IEEE 802.3af
電源電壓： 3 V ~ 4 V
電流 - 電源： 2.5mA
工作溫度： 0°C ~ 70°C
安裝類型： 表面貼裝
封裝/外殼： 36-BSOP（0.295"，7.50mm 寬）
供應商設(shè)備封裝： 36-SSOP
包裝： 帶卷 (TR)
LTC4258
9
4258fb
*
The
start-up
state
of
the
V
EE
UVLO
bit
depends
on
the
order
in
which
the
V
DD
and
V
EE
supplies
are
brought
up.
V
DD
UVLO
is
not
set
by
RESET
pin
or
reset
all
pushbutton.
Encoding
CLASS
STATUS
DETECT
STATUS
MODE
BIT
ENCODING
000
Class
Status
Unknown
000
Detect
Status
Unknown
00
Shutdown
Power
Off,
Detection
and
Class
Off
001
Class
1
001
Short
Circuit
(<1V)
01
Manual
Will
Not
Advance
Between
States
010
Class
2
010
Reserved
10
Semiauto
Detect
and
Class
But
Wait
to
Turn
On
Power
011
Class
3
011
RLOW
11
Auto
Detect,
Class
and
Power
Automatically
100
Class
4
100
Detect
Good
101
Undefined—Read
as
Class
0
101
RHIGH
110
Class
0
110
Open
Circuit
111
Overcurrent
111
Reserved
Key:
RO
=
Read
Only
R/W
=
Read/Write
CoR
=
Clear
on
Read
WO
=
Write
Only
ADDRESS
REGISTER
NAME
R/W
PORT
BIT
7
BIT
6
BIT
5
BIT
4
BIT
3
BIT
2
BIT
1
BIT
0
RESET
STATE
RESET
STATE
Interrupts
Auto
Pin
Low
Auto
Pin
High
00h
Interrupt
RO
Global
Supply
Event
t START
Fault
t ICUT
Fault
Class
Complete
Detect
Complete
Disconnect
Pwr
Good
Event
Pwr
Enable
Event
1000,0000
01h
Int
Mask
R/W
Global
Mask
7
Mask
6
Mask
5
Mask
4
Mask
3
Mask
2
Mask
1
Mask
0
1000,0000
1110,0100
Events
02h
Power
Event
RO
4321
Pwr
Good
Pwr
Good
Pwr
Good
Pwr
Good
Pwr
Enable
Pwr
Enable
Pwr
Enable
Pwr
Enable
0000,0000
03h
Power
Event
CoR
Change
4
Change
3
Change
2
Change
1
Change
4
Change
3
Change
2
Change
1
04h
Detect
Event
RO
4321
Class
Complete
4
Class
Complete
3
Class
Complete
2
Class
Complete
1
Detect
Complete
4
Detect
Complete
3
Detect
Complete
2
Detect
Complete
1
0000,0000
05h
Detect
Event
CoR
06h
Fault
Event
RO
4321
Disconnect
4
Disconnect
3
Disconnect
2
Disconnect
1
t ICUT
Fault
4
t ICUT
Fault
3
t ICUT
Fault
2
t ICUT
Fault
1
0000,0000
07h
Fault
Event
CoR
08h
t START
Event
RO
4321
Reserved
t START
Fault
4
t START
Fault
3
t START
Fault
2
t START
Fault
1
0000,0000
09h
t START
Event
CoR
0Ah
Supply
Event
RO
4321
Over
Temp
Reserved
V
DD
UVLO
V
EE
UVLO
Reserved
0011,0000*
0Bh
Supply
Event
CoR
Status
0Ch
Port
1
Status
RO
1
Reserved
Class
Status
2
Class
Status
1
Class
Status
0
Reserved
Detect
Status
2
Detect
Status
1
Detect
Status
0
0000,0000
0Dh
Port
2
Status
RO
2
Reserved
Class
Status
2
Class
Status
1
Class
Status
0
Reserved
Detect
Status
2
Detect
Status
1
Detect
Status
0
0000,0000
0Eh
Port
3
Status
RO
3
Reserved
Class
Status
2
Class
Status
1
Class
Status
0
Reserved
Detect
Status
2
Detect
Status
1
Detect
Status
0
0000,0000
0Fh
Port
4
Status
RO
4
Reserved
Class
Status
2
Class
Status
1
Class
Status
0
Reserved
Detect
Status
2
Detect
Status
1
Detect
Status
0
0000,0000
10h
Power
Status
RO
4321
Power
Good
4
Power
Good
3
Power
Good
2
Power
Good
1
Power
Enable
4
Power
Enable
3
Power
Enable
2
Power
Enable
1
0000,0000
11h
Pin
Status
RO
Global
Reserved
AD3
Pin
Status
AD2
Pin
Status
AD1
Pin
Status
AD0
Pin
Status
Reserved
Auto
Pin
Status
00A
3A
2,A
1A
000
00A
3A
2,A
1A
001
Configuration
12h
Operating
Mode
R/W
4321
Port
4
Mode
1
Port
4
Mode
0
Port
3
Mode
1
Port
3
Mode
0
Port
2
Mode
1
Port
2
Mode
0
Port
1
Mode
1
Port
1
Mode
0
0000,0000
1111,1111
13h
Disconnect
Enable
R/W
4321
Reserved
DC
Discon
En
4
DC
Discon
En
3
DC
Discon
En
2
DC
Discon
En
1
0000,0000
0000,1111
14h
Detect/Class
Enable
R/W
4321
Class
Enable
4
Class
Enable
3
Class
Enable
2
Class
Enable
1
Detect
Enable
4
Detect
Enable
3
Detect
Enable
2
Detect
Enable
1
0000,0000
1111,1111
15h
Reserved
R/W
Reserved
0000,0000
16h
Timing
Config
R/W
G
lobal
Reserved
t START1
t START0
t ICUT1
t ICUT0
t DIS1
t DIS0
0000,0000
17h
Misc
Config
R/W
Global
Interrupt
Pin
Reserved
1000,0000
Enable
Pushbuttons
18h
Det/Class
Restart
PB
WO
4321
Restart
Class
4
Restart
Class
3
Restart
Class
2
Restart
Class
1
Restart
Detect
4
Restart
Detect
3
Restart
Detect
2
Restart
Detect
1
0000,0000
19h
Power
Enable
PB
WO
4321
Power
Off
4
Power
Off
3
Power
Off
2
Power
Off
1
Power
On
4
Power
On
3
Power
On
2
Power
On
1
0000,0000
1Ah
Reset
PB
WO
Global
Clear
All
Clear
Interrupt
Pin
Reserved
Reset
All
Reset
Port
4
Reset
Port
3
Reset
Port
2
Reset
Port
1
0000,0000
Interrupts
TABLE 1. REGISTER
AP
W
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