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參數資料
型號: LTC4240IGN#TRPBF
廠商: Linear Technology
文件頁數: 23/28頁
文件大小: 493K
描述: IC CTRLR HOTSWAP CPCI I2C 28SSOP
標準包裝: 2,500
類型: 熱交換控制器
應用: CompactPCI?
內部開關:
電源電壓: 3.3V,5V,±12V
工作溫度: -40°C ~ 85°C
安裝類型: 表面貼裝
封裝/外殼: 28-SSOP(0.154",3.90mm 寬)
供應商設備封裝: 28-SSOP
包裝: 帶卷 (TR)
LTC4240
23
4240f
APPLICATIO  S I FOR  ATIO
U
U
U
than 2礎, then a 50K resistor can be connected directly
from the 1V bias voltage to the I/O line. However, many ICs
connected to the I/O lines can have leakage currents up to
10礎. For these applications, a 10k resistor is used but
must be disconnected when the board has been seated as
determined by the state of the BD_SEL# signal. Figure 14
shows a precharge circuit that uses a bus switch to
GND
5V
IN
OFF/ON
5V
IN
LTC4240*
PRECHARGE
DRIVE
21
28
18
17
Z4: 1PMT5.0AT3
*ADDITIONAL DETAILS OMITTED FOR CLARITY
DATA BUS
I/O
4240 F14
Q3
MMBT2222A
10
R11
18&, 5%
R18
1k, 5%
3V
IN
R
I01
10&
5%
R
PRE1
10k
5%
R
PRE128
10k
5%
PRECHARGE OUT
1V ?0%
I
OUT
 = ?5mA
I/O
R
I0128
10&
5%
R22
2.74&
R8
1k, 5%
R7
12&, 5%
C3, 4.7nF
R9
24&
PCI
BRIDGE
CHIP
MEDIUM 5V
LONG 5V
BD_SEL#
GROUND
I/O PIN 1
I/O PIN 128
Z4
UP TO 128 I/O LINES
0.1礔
100&
LONG
5V
Q4
MMBT3906
R26
51.1k, 5%
R27
75k
5%
BUS SWITCH
V
DD
OE
OUT
OUT
IN
CompactPCI
BACKPLANE
CONNECTOR
(FEMALE)
CompactPCI
BACKPLANE
CONNECTOR
(MALE)
R17
1.2k
5%
Figure 14. Precharge Bus Switch Application Circuit for 3.3V and Universal Hot Swap Boards
Figure 13.Precharge Application Circuit for 5V Signaling Systems
GND
5V
IN
OFF/ON
5V
IN
LTC4240*
PRECHARGE
DRIVE
21
28
18
17
Z4: 1PMT5.0AT3
*ADDITIONAL DETAILS OMITTED FOR CLARITY
DATA BUS
I/O
4240 F13
PRECHARGE OUT
1V ?0%
I
OUT
 = ?5mA
R
PRE1
10k
5%
R11
18&, 5%
R18
1k, 5%
3V
IN
R
I01
10&
5%
I/O
R
I0128
10&
5%
R17
1.2k
 5%
R22
2.74&
R
PRE128
10k
5%
R8
1k, 5%
R7
12&, 5%
C3, 4.7nF
R9
24&
PCI
BRIDGE
CHIP
MEDIUM 5V
LONG 5V
BD_SEL#
GROUND
I/O PIN 1
I/O PIN 128
LONG
5V
Z4
UP TO 128 I/O LINES
Q3
MMBT2222A
CompactPCI
BACKPLANE
CONNECTOR
(FEMALE)
CompactPCI
BACKPLANE
CONNECTOR
(MALE)
connect the individual 10k precharge resistors to the
LTC4240 1V PRECHARGE pin. The electrical connection is
made (bus switches close) when the voltage on the
BD_SEL# pin of the plug-in card is above 4.4V, which
occurs just after the long pins have made contact. The bus
switches are subsequently electrically disconnected when
the board connector makes contact with the BD_SEL# pin
(bus switch OE pin is pulled high by Q4).
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相關代理商/技術參數
參數描述
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LTC4241CGN#TR 功能描述:IC CTRLR HOTSWAP 3.3V AUX 20SSOP RoHS:否 類別:集成電路 (IC) >> PMIC - 熱交換 系列:- 標準包裝:50 系列:- 類型:熱交換控制器 應用:-48V 遠程電力系統,AdvancedTCA ? 系統,高可用性 內部開關:無 電流限制:可調 電源電壓:11.5 V ~ 14.5 V 工作溫度:-40°C ~ 85°C 安裝類型:表面貼裝 封裝/外殼:10-TFSOP,10-MSOP(0.118",3.00mm 寬) 供應商設備封裝:10-MSOP 包裝:管件
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