- 您现在的位置：买卖IC网 > PDF目录11629 > LTC4315IMS#PBF (Linear Technology)IC 2WIRE BUS BUFFER 12MSOP PDF资料下载
参数资料
| 型号： | LTC4315IMS#PBF |
| 厂商： | Linear Technology |
| 文件页数： | 20/20页 |
| 文件大小： | 0K |
| 描述： | IC 2WIRE BUS BUFFER 12MSOP |
| 标准包装： | 37 |
| 类型： | 2线总线缓冲器 |
| Tx/Rx类型： | I²C Logic |
| 电容 - 输入： | 10pF |
| 电源电压： | 2.9 V ~ 5.5 V |
| 电流 - 电源： | 8.1mA |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 12-TSSOP（0.118"，3.00mm 宽） |
| 供应商设备封装： | 12-MSOP |
| 包装： | 管件 |
LTC4315
9
4315f
The LTC4315 provides capacitance buffering, data and
clock Hot Swap capability and level translation of I2C signals
on its clock and data pins. The high noise margin of the
LTC4315 permits interoperability with I2C devices that drive
a high VOL,permitsseriesconnectionofmultipleLTC4315s
and provides improved I2C communication reliability.
The LTC4315 isolates backplane and card capacitances,
provides slew limited acceleration of rising edges and slew
control of falling edges while level translating 1.5V, 1.8V,
2.5V, 3.3V and 5V busses. These features are illustrated
in the following subsections.
RISE TIME ACCELERATOR (RTA) PULL-UP CURRENT
STRENGTH
After an input to output connection has been established
the RTAs on both the input and output sides of the SDA
and SCL busses are activated based on the state of the
ACC pin and the VCC2 supply voltage. During positive bus
transitions of at least 0.4V/μs, the RTAs provide pull-up
currents to reduce rise time. Enabling the RTAs allows
users to choose larger bus pull-up resistors to reduce
power consumption and improve logic low noise margins,
to design with bus capacitances outside of the I2C speci-
fication and to operate at a higher clock frequency. The
function of the ACC pin in setting IRTA is summarized in
Table 1. In the strong mode (ACC low) the acceleration is
slew limited to a maximum bus rise rate of 75V/μs. The
strong mode current is therefore directly proportional to
the bus capacitance. The LTC4315 is capable of sourcing
up to 40mA of current in the strong mode. If ACC is left
open, rise time acceleration is provided by a 2.5mA pull up.
TABLE 1: ACC Control of the RTA Current IRTA
ACC
IRTA
Low
Strong
Hi-Z
2.5mA
High
None
The ACC pin has a resistive divider between VCCandground
to set its voltage to 0.5 VCC if left open.
APPLICATIONS INFORMATION
Figures 1 and 2 show the rising waveforms of heavily
loaded SDAIN and SDAOUT busses with the ACC pin set for
strong mode and 2.5mA current source mode respectively.
In both figures, during a rising edge, the buffers are active
and the input and output sides connected, until the bus
voltages on both the input and output sides are greater than
0.33 VMIN, where VMIN is the lower of the VCC and VCC2
voltages. When each individual bus voltage rises above
0.41 VMIN, the RTA on that bus turns on. The effect of the
acceleration strength is shown in the SDA waveforms in
Figures 1 and 2 for identical bus loads. The RTAs supply
10mA and 2.5mA of pull-up current IRTA in the strong and
current source modes respectively for the bus conditions
shown in Figures 1 and 2. For identical bus loads, the bus
rises faster in Figure 1 compared to Figure 2 because of
the higher IRTA.
Figure 1. Bus Rising Edge for the Strong Acceleration Mode.
VCC = VCC2 = 5V
Figure 2. Bus Rising Edge for the Current Source
Acceleration Mode. VCC = VCC2 = 5V
2V/DIV
1μs/DIV
4315 F01
VCC = VCC2 = 5V
RBUS = 20k
CIN = COUT = 200pF
ACC = 0V
SDAIN
SDAOUT
2V/DIV
1μs/DIV
4315 F02
VCC = VCC2 = 5V
RBUS = 20k
CIN = COUT = 200pF
ACC = OPEN
SDAIN
SDAOUT
相关PDF资料 |
PDF描述 |
|---|---|
| VE-J5F-IY-F1 | CONVERTER MOD DC/DC 72V 50W |
| LTC4313IDD-3#PBF | IC 2WIRE BUS BUFFER 8DFN |
| LTC4313IDD-2#PBF | IC 2WIRE BUS BUFFER 8DFN |
| VE-J5D-IZ-B1 | CONVERTER MOD DC/DC 85V 25W |
| LTC4313IMS8-2#PBF | IC 2WIRE BUS BUFFER 8MSOP |
相关代理商/技术参数 |
参数描述 |
|---|---|
| LTC435 | 制造商:Thomas & Betts 功能描述:TSB COVER,4WAY,350MCM |
| LTC4350CGN | 功能描述:IC CNTRLR HOTSWAP LOADSHAR16SSOP RoHS:否 类别:集成电路 (IC) >> PMIC - 热交换 系列:- 产品培训模块:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 标准包装:119 系列:- 类型:热交换控制器 应用:通用型，PCI Express? 内部开关:无 电流限制:- 电源电压:3.3V，12V 工作温度:-40°C ~ 85°C 安装类型:表面贴装 封装/外壳:80-TQFP 供应商设备封装:80-TQFP（12x12） 包装:托盘 产品目录页面:1423 (CN2011-ZH PDF) |
| LTC4350CGN#PBF | 功能描述:IC CTLR HOTSWAP LOADSHARE 16SSOP RoHS:是 类别:集成电路 (IC) >> PMIC - 热交换 系列:- 产品培训模块:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 标准包装:119 系列:- 类型:热交换控制器 应用:通用型，PCI Express? 内部开关:无 电流限制:- 电源电压:3.3V，12V 工作温度:-40°C ~ 85°C 安装类型:表面贴装 封装/外壳:80-TQFP 供应商设备封装:80-TQFP（12x12） 包装:托盘 产品目录页面:1423 (CN2011-ZH PDF) |
| LTC4350CGN#TR | 功能描述:IC CNTRLR HOTSWAP LOADSHAR16SSOP RoHS:否 类别:集成电路 (IC) >> PMIC - 热交换 系列:- 产品培训模块:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 标准包装:119 系列:- 类型:热交换控制器 应用:通用型，PCI Express? 内部开关:无 电流限制:- 电源电压:3.3V，12V 工作温度:-40°C ~ 85°C 安装类型:表面贴装 封装/外壳:80-TQFP 供应商设备封装:80-TQFP（12x12） 包装:托盘 产品目录页面:1423 (CN2011-ZH PDF) |
| LTC4350CGN#TRPBF | 功能描述:IC CNTRLR HOTSWAP LOADSHAR16SSOP RoHS:是 类别:集成电路 (IC) >> PMIC - 热交换 系列:- 产品培训模块:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 标准包装:119 系列:- 类型:热交换控制器 应用:通用型，PCI Express? 内部开关:无 电流限制:- 电源电压:3.3V，12V 工作温度:-40°C ~ 85°C 安装类型:表面贴装 封装/外壳:80-TQFP 供应商设备封装:80-TQFP（12x12） 包装:托盘 产品目录页面:1423 (CN2011-ZH PDF) |
发布紧急采购，3分钟左右您将得到回复。