參數(shù)資料
型號(hào)： 11274-502-XTP
廠商： ON SEMICONDUCTOR
元件分類(lèi)： PLL合成/DDS/VCOs
英文描述： PLL FREQUENCY SYNTHESIZER, 28 MHz, PDSO16
封裝： 0.150 INCH, GREEN, SOIC-16
文件頁(yè)數(shù)： 28/43頁(yè)
文件大小： 1343K
代理商： 11274-502-XTP
FS6131-01/FS6131-01g Programmable Line Lock Clock Generator IC
Data Sheet
However, the full signal amplitude may take up to twice as long as the propagation delay of the line to develop, reducing noise immunity
during the half-amplitude period. Note that the voltage at the receive end must add up to a signal amplitude that meets the receiver
switching thresholds. The slew rate of the signal may be reduced due to the additional RC delay of the load capacitance and the line
impedance. Also, note that the output driver impedance will vary slightly with the output logic state (high or low).
11.3 Serial Communications
Connection of devices to a standard-mode implementation of the I2C-bus is similar to that shown in Figure 24. Selection of the pull-up
resistors (RP) and the optional series resistors (RS) on the SDA and SCL lines depends on the supply voltage, the bus capacitance and
the number of connected devices with their associated input currents.
Control of the clock and data lines is done through open drain/collector current-sink outputs, and thus requires external pull-up resistors
on both lines.
A guideline is
bus
r
P
C
t
R
×
<
2
where tr is the maximum rise time (minus some margin) and Cbus is the total bus capacitance. Assuming an I2C controller and eight to ten
other devices on the bus, including this one, results in values in the 5kW to 7kW range. Use of a series resistor to provide protection
against high voltage spikes on the bus will alter the values for RP.
R
P
SDA
SCL
Data In
Data Out
Clock Out
Data In
Data Out
Clock In
R
P
R
S
(optional)
R
S
(optional)
R
S
(optional)
R
S
(optional)
RECEIVER
TRANSMITTER
Figure 24: Connections to the Serial Bus
11.3.1 For More Information
More information on the I
2C -bus can be found in the document The I2C-bus And How To Use It (Including Specifications), available
from Philips Semiconductors at http://www-us2.semiconductors.philips.com.
34
AMI Semiconductor – Rev. 3.0, Jan. 08
www.amis.com
Specifications subject to change without notice
相關(guān)PDF資料
PDF描述
11274-001-XTP PLL FREQUENCY SYNTHESIZER, 28 MHz, PDSO16
11274-502-XTD PLL FREQUENCY SYNTHESIZER, 28 MHz, PDSO16
11274-001-XTD PLL FREQUENCY SYNTHESIZER, 28 MHz, PDSO16
11274-502-XTP PLL FREQUENCY SYNTHESIZER, 28 MHz, PDSO16
11274-001-XTD PLL FREQUENCY SYNTHESIZER, 28 MHz, PDSO16
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