- 您现在的位置：买卖IC网 > PDF目录22128 > LTC4240IGN#TR (Linear Technology)IC CTRLR HOT SWAP CPCI 28-SSOP PDF资料下载
参数资料
| 型号： | LTC4240IGN#TR |
| 厂商： | Linear Technology |
| 文件页数： | 8/28页 |
| 文件大小： | 493K |
| 描述： | IC CTRLR HOT SWAP CPCI 28-SSOP |
| 标准包装： | 2,500 |
| 类型： | 热交换控制器 |
| 应用： | CompactPCI? |
| 内部开关： | 无 |
| 电源电压： | 3.3V，5V，±12V |
| 工作温度： | -40°C ~ 85°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 28-SSOP（0.154"，3.90mm 宽） |
| 供应商设备封装： | 28-SSOP |
| 包装： | 带卷 (TR) |
第1页第2页第3页第4页第5页第6页第7页当前第8页第9页第10页第11页第12页第13页第14页第15页第16页第17页第18页第19页第20页第21页第22页第23页第24页第25页第26页第27页第28页
LTC4240
8
4240f
PWRGD (Pin 8): Open-Drain Power Good Output. Con-
nect the CPCI HEALTHY# signal to the PWRGD pin.
PWRGD remains low while V
12VOUT
e 11.1V, V
3VOUT
e
2.9V, V
5VOUT
e 4.65V and V
EEOUT
d 10.5V. When any of
the supplies drops below its power good threshold volt-
age, PWRGD will go high after a 10祍 deglitching time. The
switches will not be turned off when PWRGD goes high,
unless a fault has occurred. The CPCI specification calls
for a 0.01礔 bypass capacitor on the backplane for
HEALTHY#.
BE (Pin 9): QuickSwitch Bus Enable Output. The BE output
remains high until power is good on all supplies. This
serves to isolate the I/O data lines during live
insertion. This is a CMOS output powered by 5V
IN
.
GND (Pin 10): Analog Ground. Connect to analog ground
plane.
ADDRIN (Pin 11): I
2
C Address Programming Input. The
I
2
C address is programmed by connecting the ADDRIN
pin to a resistor divider between the 5V
IN
pin and GND. See
Table 1 for 1% resistor values and corresponding ad-
dresses. Resistors must be placed close to the ADDRIN
pin to minimize errors due to stray capacitance and
resistance on the board trace. Connect this pin to ground
if I
2
C is not used.
SDA (Pin 12): I
2
C Data Input and Output. Note that TTL
levels are used. Connect this pin to ground if I
2
C is not
used.
SCL (Pin 13): I
2
C Clock Input, 100kHz Maximum. Note
that TTL levels are used. Do not float. Connect this pin to
ground if I
2
C is not used.
RESETOUT (Pin 14): Open-Drain Reset Output. Connect
the CPCI LOCAL_PCI_RST# signal to the RESETOUT pin.
RESETOUT is the logical combination of RESETIN, PWRGD,
and I
2
C RESETOUT latch output.
LED (Pin 15): CPCI Status LED. Pulls low to light LED
when RESETOUT is low or when the I
2
C LED latch is set.
DGND (Pin 16): Digital Ground. Connect to ground plane.
DRIVE (Pin 17): External transistors base drive output for
bus precharge. Connects to the base of an external NPN
emitter-follower which in turn biases the PRECHARGE
PRSNT1# (Pin 1): PCI Present Detect Input 1. PRSNT1#
and PRSNT2# are readable over the I
2
C Bus. PRSNT1#
and PRSNT2# indicate the maximum power used by the
card. Do not float.
PRSNT2# (Pin 2): PCI Present Detect Input 2. Do not float.
12V
IN
(Pin 3): 12V Supply Input. A 0.5& switch is inter-
nally connected between 12V
IN
and 12V
OUT
with foldback
current limit. An undervoltage lockout circuit prevents the
switches from turning on while the 12V
IN
pin is below 8V.
12V
IN
provides power to some of the LTC4240s internal
circuitry. See Input Transient Protection section on how to
protect 12V
IN
from large voltage transients.
V
EEIN
(Pin 4): 12V Supply Input. A 1& internal switch is
connected between V
EEIN
and V
EEOUT
with foldback cur-
rent limit. An undervoltage lockout circuit prevents the
switches from turning on while V
EEIN
is above 9V. See
Connecting V
EEIN
section for more notes on V
EEIN
and
V
EEOUT
. Also refer to Input Transient Protection section.
TIMER/AUX 12V
IN
(Pin 5): Current Fault Inhibit Timing
Input. Connect a capacitor from TIMER to GND. With the
LTC4240 turned off (OFF/ON = HIGH), the TIMER pin is
internally held at GND. When the device is turned on, an
11.5礎 pull-up current source is connected to TIMER.
Current limit faults will be ignored until the voltage at the
TIMER pin rises above 5.5V. The Timer capacitor also
serves as an auxiliary charge reservoir for internal V
CC
in
the event the 12V
IN
pin voltage glitches below the LTC4240
UVL threshold voltage.
5V
OUT
(Pin 6): 5V Output Sense. The PWRGD pin will not
pull low until the 5V
OUT
pin voltage exceeds 4.65V. When
the power switches are turned off, a 50& resistor pulls
5V
OUT
to ground.
FAULT (Pin 7): Open-Drain Fault Output . FAULT is pulled
low when a current limit fault is detected. Current limit
faults are ignored until the voltage at the TIMER pin is
above 5.5V. Once the TIMER cycle is complete, FAULT
pulls low and the LTC4240 turns off (in the event of an
overcurrent fault lasting longer than 35祍). The LTC4240
will remain in the off state until the OFF/ON pin is cycled
high then low or power is cycled. Note that the OFF/ON
cycling can also be performed using I
2
C bus.
U
U
PI FU CTIO S
相关PDF资料 |
PDF描述 |
|---|---|
| VE-2WB-CY-F3 | CONVERTER MOD DC/DC 95V 50W |
| LC4064C-10TN44I | IC CPLD 64MACROCELLS 44TQFP |
| TAJA686M004RNJ | CAP TANT 68UF 4V 20% 1206 |
| VE-2WB-CY-F1 | CONVERTER MOD DC/DC 95V 50W |
| LC4032V-5TN48C | IC CPLD 32MACROCELLS 48TQFP |
相关代理商/技术参数 |
参数描述 |
|---|---|
| LTC4241 | 制造商:LINER 制造商全称:Linear Technology 功能描述:PCI-Bus with 3.3V Auxiliary Hot Swap Controller |
| LTC4241CGN | 功能描述:IC CTRLR HOTSWAP PCI 3.3V 20SSOP RoHS:否 类别:集成电路 (IC) >> PMIC - 热交换 系列:- 标准包装:50 系列:- 类型:热交换控制器 应用:-48V 远程电力系统，AdvancedTCA ? 系统，高可用性 内部开关:无 电流限制:可调 电源电压:11.5 V ~ 14.5 V 工作温度:-40°C ~ 85°C 安装类型:表面贴装 封装/外壳:10-TFSOP，10-MSOP（0.118"，3.00mm 宽） 供应商设备封装:10-MSOP 包装:管件 |
| LTC4241CGN#PBF | 功能描述:IC CTRLR HOTSWAP CPCI I2C 20SSOP RoHS:是 类别:集成电路 (IC) >> PMIC - 热交换 系列:- 标准包装:50 系列:- 类型:热交换控制器 应用:-48V 远程电力系统，AdvancedTCA ? 系统，高可用性 内部开关:无 电流限制:可调 电源电压:11.5 V ~ 14.5 V 工作温度:-40°C ~ 85°C 安装类型:表面贴装 封装/外壳:10-TFSOP，10-MSOP（0.118"，3.00mm 宽） 供应商设备封装:10-MSOP 包装:管件 |
| LTC4241CGN#TR | 功能描述:IC CTRLR HOTSWAP 3.3V AUX 20SSOP RoHS:否 类别:集成电路 (IC) >> PMIC - 热交换 系列:- 标准包装:50 系列:- 类型:热交换控制器 应用:-48V 远程电力系统，AdvancedTCA ? 系统，高可用性 内部开关:无 电流限制:可调 电源电压:11.5 V ~ 14.5 V 工作温度:-40°C ~ 85°C 安装类型:表面贴装 封装/外壳:10-TFSOP，10-MSOP（0.118"，3.00mm 宽） 供应商设备封装:10-MSOP 包装:管件 |
| LTC4241CGN#TRPBF | 功能描述:IC PCI-BUS W/HOT SWAP 20SSOP RoHS:是 类别:集成电路 (IC) >> PMIC - 热交换 系列:- 标准包装:50 系列:- 类型:热交换控制器 应用:-48V 远程电力系统，AdvancedTCA ? 系统，高可用性 内部开关:无 电流限制:可调 电源电压:11.5 V ~ 14.5 V 工作温度:-40°C ~ 85°C 安装类型:表面贴装 封装/外壳:10-TFSOP，10-MSOP（0.118"，3.00mm 宽） 供应商设备封装:10-MSOP 包装:管件 |
发布紧急采购，3分钟左右您将得到回复。