- 您現(xiàn)在的位置：買賣IC網(wǎng) > PDF目錄11806 > LTC4305CGN#PBF (Linear Technology)IC BUFFER BUS 2WR ADDRESS 16SSOP PDF資料下載
參數(shù)資料
| 型號(hào)： | LTC4305CGN#PBF |
| 廠商： | Linear Technology |
| 文件頁(yè)數(shù)： | 3/20頁(yè) |
| 文件大?。?/td> | 0K |
| 描述： | IC BUFFER BUS 2WR ADDRESS 16SSOP |
| 產(chǎn)品培訓(xùn)模塊： | LTC4310 - Hot-Swappable I²C Isolators |
| 標(biāo)準(zhǔn)包裝： | 100 |
| 應(yīng)用： | 帶放大器的多路復(fù)用器 |
| 接口： | SMBus（2 線/I²C） |
| 電源電壓： | 2.2 V ~ 5.5 V |
| 封裝/外殼： | 16-SSOP（0.154"，3.90mm 寬） |
| 供應(yīng)商設(shè)備封裝： | 16-SSOP |
| 包裝： | 管件 |
| 安裝類型： | 表面貼裝 |
| 產(chǎn)品目錄頁(yè)面： | 1355 (CN2011-ZH PDF) |
第1頁(yè)第2頁(yè)當(dāng)前第3頁(yè)第4頁(yè)第5頁(yè)第6頁(yè)第7頁(yè)第8頁(yè)第9頁(yè)第10頁(yè)第11頁(yè)第12頁(yè)第13頁(yè)第14頁(yè)第15頁(yè)第16頁(yè)第17頁(yè)第18頁(yè)第19頁(yè)第20頁(yè)
LTC4305
11
4305f
separated by the series combination of their switches’ on
resistances. While neither, either or both downstream
buses may be connected at the same time, logic high
levels are corrupted if both downstream buses are active
and both the VCC voltage and one downstream bus pull-up
voltage are larger than the pull-up supply voltage of the
other downstream bus. An example of this issue is shown
in Figure 1. During logic highs, DC current flows from
VBUS1 through the series combination of R1, N1, N2 and
R2 and into VBUS2, causing the SDA1 voltage to drop and
current to be sourced into VBUS2. To avoid this problem,
do not activate bus 1 when bus 2 is active.
first, the pin’s voltage is rising at a minimum slew rate of
0.8V/
s; second, the voltages on both the upstream bus
and the connected downstream buses exceed 0.8V.
Note that a downstream bus must be connected to the
upstream bus in order for its rise time accelerator current
to be active. See the Applications Section for choosing a
bus pull-up resistor value to ensure that the rise time
accelerator switches turn on. Do not activate boost cur-
rents on a bus whose pull-up supply voltage VBUS < VCC.
Doing so would cause the boost currents to source
current from VCC into the VBUS supply during rising
edges.
Downstream Bus Connection Fault
By default, the LTC4305 will only connect to downstream
buses whose SDA and SCL pins are both high (above 1V)
at the moment that it receives the connection command.
In this case, the LTC4305 sets the Failed Connection
Attempt bit of register 0 low and pulls the ALERT low when
the master tries to connect to a low downstream bus. Note
that users can write a high to the Connection Requirement
bit of register 2 to program the LTC4305 to connect to
downstream buses regardless of their logic state at the
moment of connection. In this case, the Downstream
Channel Connection Fault never occurs.
Stuck Low Timeout Fault
The Stuck Low Timeout Circuitry monitors the two com-
mon internal nodes of the downstream SDA and SCL
switches and runs a timer whenever either of the internal
node voltages is below 0.52V. The timer is reset whenever
both internal node voltages are above 0.6V. If the timer
ever reaches the time programmed by Timeout Mode Bits
1 and 0 of register 2, the LTC4305 pulls ALERT low and
OPERATIO
U
Rise Time Accelerators
The Upstream Accelerators Enable and Downstream Ac-
celerators Enable bits of register 1 activate the upstream
and downstream rise time accelerators, respectively. When
activated, the accelerators turn on in a controlled manner
and source current into the pins during positive bus
transitions.
When no downstream buses are connected, an upstream
accelerator turns on when its pin voltage exceeds 0.8V
and is rising at a minimum slew rate of 0.8V/
s. When one
or more downstream buses are connected, the accelera-
tor on a given pin turns on when these conditions are met:
Figure 1. Example of Unacceptable Level Shifting
SDA2
4305 F01
SDA1
R1
10k
R2
10k
N1
N2
VCC = VBUS1 = 5V
VBUS2 = 2.5V
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| LTC1755EGN#PBF | IC SMART CARD INTERFACE 24SSOP |
| AT32UC3C264C-A2UR | IC MCU AVR32 64K FLASH 64TQFP |
| LTC1756EGN#PBF | IC SMART CARD INTERFACE 16SSOP |
| AT89C51IC2-RLRUL | IC 8051 MCU 32K FLASH 44-VQFP |
| ATMEGA645V-8AUR | MCU AVR 64KB FLASH 8MHZ 64TQFP |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| LTC4305IDHD | 功能描述:IC BUFFER BUS 2WR ADDRESS 16-DFN RoHS:否 類別:集成電路 (IC) >> 接口 - 專用 系列:- 特色產(chǎn)品:NXP - I2C Interface 標(biāo)準(zhǔn)包裝:1 系列:- 應(yīng)用:2 通道 I²C 多路復(fù)用器 接口:I²C，SM 總線 電源電壓:2.3 V ~ 5.5 V 封裝/外殼:16-TSSOP（0.173"，4.40mm 寬） 供應(yīng)商設(shè)備封裝:16-TSSOP 包裝:剪切帶 (CT) 安裝類型:表面貼裝 產(chǎn)品目錄頁(yè)面:825 (CN2011-ZH PDF) 其它名稱:568-1854-1 |
| LTC4305IDHD#PBF | 功能描述:IC BUFFER BUS 2WR ADDRESS 16-DFN RoHS:是 類別:集成電路 (IC) >> 接口 - 專用 系列:- 特色產(chǎn)品:NXP - I2C Interface 標(biāo)準(zhǔn)包裝:1 系列:- 應(yīng)用:2 通道 I²C 多路復(fù)用器 接口:I²C，SM 總線 電源電壓:2.3 V ~ 5.5 V 封裝/外殼:16-TSSOP（0.173"，4.40mm 寬） 供應(yīng)商設(shè)備封裝:16-TSSOP 包裝:剪切帶 (CT) 安裝類型:表面貼裝 產(chǎn)品目錄頁(yè)面:825 (CN2011-ZH PDF) 其它名稱:568-1854-1 |
| LTC4305IDHD#TR | 功能描述:IC BUFFER BUS 2WR ADDRESS 16-DFN RoHS:否 類別:集成電路 (IC) >> 接口 - 專用 系列:- 特色產(chǎn)品:NXP - I2C Interface 標(biāo)準(zhǔn)包裝:1 系列:- 應(yīng)用:2 通道 I²C 多路復(fù)用器 接口:I²C，SM 總線 電源電壓:2.3 V ~ 5.5 V 封裝/外殼:16-TSSOP（0.173"，4.40mm 寬） 供應(yīng)商設(shè)備封裝:16-TSSOP 包裝:剪切帶 (CT) 安裝類型:表面貼裝 產(chǎn)品目錄頁(yè)面:825 (CN2011-ZH PDF) 其它名稱:568-1854-1 |
| LTC4305IDHD#TRPBF | 功能描述:IC BUFFER BUS 2WR ADDRESS 16-DFN RoHS:是 類別:集成電路 (IC) >> 接口 - 專用 系列:- 特色產(chǎn)品:NXP - I2C Interface 標(biāo)準(zhǔn)包裝:1 系列:- 應(yīng)用:2 通道 I²C 多路復(fù)用器 接口:I²C，SM 總線 電源電壓:2.3 V ~ 5.5 V 封裝/外殼:16-TSSOP（0.173"，4.40mm 寬） 供應(yīng)商設(shè)備封裝:16-TSSOP 包裝:剪切帶 (CT) 安裝類型:表面貼裝 產(chǎn)品目錄頁(yè)面:825 (CN2011-ZH PDF) 其它名稱:568-1854-1 |
| LTC4305IGN | 功能描述:IC BUFFER BUS 2WR ADDRESS 16SSOP RoHS:否 類別:集成電路 (IC) >> 接口 - 專用 系列:- 特色產(chǎn)品:NXP - I2C Interface 標(biāo)準(zhǔn)包裝:1 系列:- 應(yīng)用:2 通道 I²C 多路復(fù)用器 接口:I²C，SM 總線 電源電壓:2.3 V ~ 5.5 V 封裝/外殼:16-TSSOP（0.173"，4.40mm 寬） 供應(yīng)商設(shè)備封裝:16-TSSOP 包裝:剪切帶 (CT) 安裝類型:表面貼裝 產(chǎn)品目錄頁(yè)面:825 (CN2011-ZH PDF) 其它名稱:568-1854-1 |
發(fā)布緊急采購(gòu)，3分鐘左右您將得到回復(fù)。