參數(shù)資料
型號(hào)： PCA9515AD
廠商： NXP Semiconductors N.V.
元件分類(lèi)： I2C/I2S
英文描述： I2C-bus repeater
封裝： PCA9515AD<SOT96-1 (SO8)|<<http://www.nxp.com/packages/SOT96-1.html<1<week 5, 2005,;PCA9515AD<SOT96-1 (SO8)|<<http://www.nxp.com/packages/SOT96-1.html<1<week 5, 2005
文件頁(yè)數(shù)： 1/18頁(yè)
文件大?。?/td> 104K
代理商： PCA9515AD
1.
General description
The PCA9515A is a CMOS integrated circuit intended for application in I
2
C-bus and
SMBus systems.
While retaining all the operating modes and features of the I
2
C-bus system, it permits
extension of the I
2
C-bus by buffering both the data (SDA) and the clock (SCL) lines, thus
enabling two buses of 400 pF.
The I
2
C-bus capacitance limit of 400 pF restricts the number of devices and bus length.
Using the PCA9515A enables the system designer to isolate two halves of a bus, thus
more devices or longer length can be accommodated. It can also be used to run two
buses, one at 5 V and the other at 3.3 V or a 400 kHz and 100 kHz bus, where the
100 kHz bus is isolated when 400 kHz operation of the other is required.
Two or more
PCA9515A
s cannot be put in series.
The PCA9515A design does not
allow this configuration. Since there is no direction pin, slightly different ‘legal’ low voltage
levels are used to avoid lock-up conditions between the input and the output. A ‘regular
LOW’ applied at the input of a PCA9515A will be propagated as a ‘buffered LOW’ with a
slightly higher value. When this ‘buffered LOW’ is applied to another PCA9515A,
PCA9516A or PCA9518/A in series, the second PCA9515A, PCA9516A or PCA9518/A
will not recognize it as a ‘regular LOW’ and will not propagate it as a ‘buffered LOW’ again.
The PCA9510/A, PCA9511/A, PCA9512/A, PCA9513/A, PCA9514/A cannot be used in
series with the PCA9515A, PCA9516A or PCA9518/A, but can be used in series with
themselves since they use shifting instead of static offsets to avoid lock-up conditions.
The output pull-down of each internal buffer is set for approximately 0.5 V, while the input
threshold of each internal buffer is set about 0.07 V lower, when the output is internally
driven LOW. This prevents a lock-up condition from occurring.
2.
Features
I
2-channel, bidirectional buffer
I
I
2
C-bus and SMBus compatible
I
Active HIGH repeater enable input
I
Open-drain input/outputs
I
Lock-up free operation
I
Supports arbitration and clock stretching across the repeater
I
Accommodates Standard-mode and Fast-mode I
2
C-bus devices and multiple masters
I
Powered-off high-impedance I
2
C-bus pins
I
Operating supply voltage range of 2.3 V to 3.6 V
I
5.5 V tolerant I
2
C-bus and enable pins
PCA9515A
I
2
C-bus repeater
Rev. 04 — 11 April 2008
Product data sheet
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相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
PCA9515AD,112 功能描述:接口-信號(hào)緩沖器、中繼器 I2C BUS REPEATER RoHS:否 制造商:Texas Instruments 工作電源電壓: 工作溫度范圍: 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:VSSOP-8 封裝:Reel
PCA9515AD,118 功能描述:接口-信號(hào)緩沖器、中繼器 I2C BUS REPEATER RoHS:否 制造商:Texas Instruments 工作電源電壓: 工作溫度范圍: 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:VSSOP-8 封裝:Reel
PCA9515AD,118-CUT TAPE 制造商:NXP 功能描述:PCA9515A Series 3.6 V 2-Channel Bidirectional Buffer I2C-bus repeater - SOIC - 8
PCA9515AD 制造商:Texas Instruments 功能描述:1WO-CHANNEL BIDIRECTIONAL ((NW))
PCA9515AD/G,118 制造商:NXP Semiconductors 功能描述:Tape & Reel
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