LTC4240 Linear Technology, LTC4240 Datasheet - Page 14
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LTC4240
Manufacturer Part Number
LTC4240
Description
CompactPCI Hot Swap Controller with I2C Compatible Interface
Manufacturer
Linear Technology
Datasheet
1.LTC4240.pdf
(28 pages)
Available stocks
Company
Part Number
Manufacturer
Quantity
Price
Part Number:
LTC4240CGN
Manufacturer:
LINEAR/凌特
Quantity:
20 000
APPLICATIO S I FOR ATIO
LTC4240
Table 2. Command Byte Definitions
C7
C6
C5
C4
C3
C2
C1
C0
14
SDA
SCL
START
1
0
HIGH
Don’t care
Don’t care
Ignore V
Ignore 12V
Sets RESETOUT
Turns OFF/ON to OFF
Overrides OFF/ON pin
Turns on LED open drain
Don’t care
RESETOUT
2
1
U
C1 TURNS ON THE EXTERNAL STATUS
LED INDEPENDENT OF RESETOUT.
EEOUT
ADDR 4
C1
3
OUT
U
ADDRESS BYTE
faults
faults
ADDR 3
4
ADDR 2
W
5
LED
Figure 2. Send Byte Command Latch and Logic
ADDR 1
6
ADDR 0
7
U
Figure 1. Send Byte Protocol
OFF/ON
C2 PULLS DOWN THE GATE OF THE
EXTERNAL N-CHANNEL SWITCHES. IT
ALSO TURNS OFF THE 12V
INTERNAL POWER SWITCHES.
C2
R/WR=0
LOW
Don’t care
Don’t care
Don’t ignore V
Don’t ignore 12V
Does not set RESETOUT low
Does not set OFF/ON
Does not override OFF/ON pin
Does not turn on LED open drain
Don’t care
8
ACK
9
IN
XX
EEOUT
AND V
1
OUT
GATE
EEIN
faults
XX
faults
2
C5
3
COMMAND BYTE
RESETIN
PWRGD
C3 IS USED TO SET
LOCAL_PCI_RST# (RESETOUT).
C4
4
C3
C3
5
C2
6
RESETOUT
C1
7
4240 F02
POWER-UP STATE
COMMAND BYTE
XX
8
LOW
LOW
LOW
LOW
LOW
N/A
N/A
N/A
LATCH
ACK
9
STOP
4240 F01
4240f