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DSC2140 डेटा पत्रक PDF( Datasheet डाउनलोड )


डेटा पत्रक - Low-Jitter I2C/SPI Programmable HCSL Oscillator - Discera

भाग संख्या DSC2140
समारोह Low-Jitter I2C/SPI Programmable HCSL Oscillator
मैन्युफैक्चरर्स Discera 
लोगो Discera लोगो 
पूर्व दर्शन
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<?=DSC2140?> डेटा पत्रक पीडीएफ

DSC2140 pdf
DSC2140 DSC2240
Low-Jitter I2C/SPI Programmable HCSL Oscillator
Pin Description
Pin No.
1
2
3
4
5
6
7
8
9
10
11
12
13
14
Pin Name
Enable
NC
NC
SCLK
GND
SDA
MOSI
SCL
MISO
CS_bar
SS
Output1+
Output1-
NC
NC
VDD2
VDD
FS
Pin Type
I
NA
NA
I
Power
I
I
O
I
I
O
O
NA
NA
Power
Power
I
Description
Enables outputs when high and disables when low
Leave unconnected or grounded
DSC2140: Leave unconnected or grounded
DSC2240: Serial clock from master
Ground
DSC2140: I2C Serial Data
DSC2240: SPI Serial Data from Master to Slave
DSC2140: I2C Serial Clock
DSC2240: SPI Serial Data from Slave to Master
DSC2140: I2C Chip Select (Active Low)
DSC2240: SPI Slave Select (Active Low)
Positive HCSL Output
Negative HCSL Output
Leave unconnected or grounded
Leave unconnected or grounded
Power Supply
Power Supply
Default output clock frequency bit
Operational Description
The DSC2140/2240 is a HCSL oscillator
consisting of a MEMS resonator and a support
PLL IC. The HCSL output is generated
through independent 8-bit programmable
dividers from the output of the internal PLL.
DSC2140/2240 allows for easy programming
of the output frequencies using I2C/SPI
interface. Upon power-up, the initial output
frequency is controlled by an internal pre-
programmed memory (OTP). This memory
stores all coefficients required by the PLL for
two different default frequencies. The control
pin (FS) selects the initial frequency. Once
the device is powered up, a new output
frequency can be programmed. Programming
details are provided in the Programming
Guide. Standard default frequencies are
described in the following sections. Discera
supports customer defined versions of the
DSC2140/2240.
When Enable (pin 1) is floated or connected to
VDD, the DSC2140/2240 is in operational
mode. Driving Enable to ground will disable
both output drivers (hi-impedance mode).
Output Clock Frequencies
Table 2 lists the standard frequency configurations and the associated ordering information to be
used in conjunction with the ordering code. Customer defined combinations are available.
Table 2. Pre-programmed pin-selectable output frequency combinations
Ordering
Info
D0001
DXXXX
Freq
(MHz)
fOUT
fOUT
Select Bit [FS] Default is [1]
0
1
125 156.25
Contact factory for additional configurations.
Frequency select bit are weakly tied high so if left unconnected the default setting will be [1] and
the device will output the associated frequency highlighted in Bold.
_____________________________________________________________________________________________________________________________ _________________
DSC2140 DSC2240
Page 2
MK-Q-B-P-D-12050110

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डाउनलोड[ DSC2140 Datasheet.PDF ]


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