DSC2210FL2-T [MICREL]
Low-Jitter I2C/SPI Programmable CMOS Oscillator;
| 型号： | DSC2210FL2-T |
| 厂家： | 
MICREL SEMICONDUCTOR |
| 描述： | Low-Jitter I2C/SPI Programmable CMOS Oscillator |
| 文件： | 总6页 (文件大小：565K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
DSC2110 DSC2210
Low-Jitter I2C/SPI Programmable CMOS Oscillator
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General Description
Features
The DSC2110 and DSC2210 series of
Low RMS Phase Jitter: <1 ps (typ)
High Stability: ±10, ±25, ±50 ppm
programmable,
high-performance
CMOS
oscillators utilize a proven silicon MEMS
technology to provide excellent jitter and
stability while incorporating high output
frequency flexibility and drive strength
control. DSC2110 and DSC2210 allow the
user to modify the frequency and CMOS drive
strength using I2C or SPI interface,
respectively. User can also select from two
pre-programmed default output frequencies
using the control pin.
Wide Temperature Range
o Automotive: -55° to 125° C
o Ext. Industrial: -40° to 105° C
o Industrial: -40° to 85° C
o Ext. commercial: -20° to 70° C
High Supply Noise Rejection: -50 dBc
I2C/SPI Programmable Freq & Drive
Short Lead Times: 2 Weeks
DSC2110 and DSC2210 are packaged in 14-
pin 3.2x2.5 mm QFN packages and available
in temperature grades from Ext. Commercial
to Automotive.
Wide Freq. Range:
o CMOS Output: 2.3 to 170 MHz
Miniature Footprint of 3.2x2.5mm
Excellent Shock & Vibration Immunity
o Qualified to MIL-STD-883
Block Diagram
High Reliability
o 20x better MTF than quartz oscillators
Supply Range of 2.25 to 3.6 V
Lead Free & RoHS Compliant
Applications
Consumer Electronics
Storage Area Networks
o SATA, SAS, Fibre Channel
Passive Optical Networks
o EPON, 10G-EPON, GPON, 10G-PON
Ethernet
o 1G, 10GBASE-T/KR/LR/SR, and FCoE
HD/SD/SDI Video & Surveillance
PCI Express
Pin # DSC2110 (I2C)
DSC2210 (SPI)
3
5
6
7
NC
SDA
SCL
SCLK
MOSI
MISO
SS
CS_bar
______________________________________________________________________________________________________________________________________________
DSC2110 DSC2210 Page 1 MK-Q-B-P-D-12050101
Low-Jitter I2C/SPI Programmable CMOS Oscillator
DSC2110 DSC2210
Pin Description
Pin No. Pin Name Pin Type
Description
Enables outputs when high and disables when low
Leave unconnected or grounded
DSC2110: Leave unconnected or grounded
DSC2210: Serial clock from master
Ground
1
2
Enable
NC
I
NA
NA
I
Power
I
NC
3
4
5
SCLK
GND
SDA
MOSI
SCL
MISO
CS_bar
SS
DSC2110: I2C Serial Data
DSC2210: SPI Serial Data from Master to Slave
DSC2110: I2C Serial Clock
DSC2210: SPI Serial Data from Slave to Master
DSC2110: I2C Chip Select (Active Low)
DSC2210: SPI Slave Select (Active Low)
CMOS output 1
Leave unconnected or grounded
Leave unconnected or grounded
Leave unconnected or grounded
Power Supply
I
O
I
I
6
7
8
9
Output1
NC
O
NA
NA
NA
Power
Power
I
10
11
12
13
14
NC
NC
VDD2
VDD
FS
Power Supply
Default output clock frequency bit
Operational Description
The DSC2110/2210 is a CMOS oscillator
consisting of a MEMS resonator and a support
mode. Driving Enable to ground will disable
both output drivers (hi-impedance mode).
PLL IC.
The CMOS output is generated
The DSC2110/2210 has programmable output
drive strength, which can be controlled via
I2C/SPI. Table 1 displays typical rise / fall
times for the output with a 15pf load
capacitance as a function of these control bits
at VDD=3.3V and room temperature.
through independent 8-bit programmable
dividers from the output of the internal PLL.
DSC2110/2210 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
DSC2110/2210.
Table 1. Rise/Fall times for drive strengths
Output Drive Strength Bits
[OXS2, OXS1, OXS0] - Default [111]
X=1 for output1, and 2 for output2
000 001 010 011 100 101 110 111
tr (ns) 2.1 1.7 1.6 1.4 1.3 1.3 1.2 1.1
tf (ns) 2.5 2.4 2.4
2
1.8 1.6 1.3 1.3
When Enable (pin 1) is floated or connected to
VDD, the DSC2110/2210 is in operational
______________________________________________________________________________________________________________________________________________
DSC2110 DSC2210 Page 2 MK-Q-B-P-D-12050101
Low-Jitter I2C/SPI Programmable CMOS Oscillator
DSC2110 DSC2210
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
Select Bit [FS] – Default is [1]
Ordering
Info
Freq
(MHz)
0
1
A0001
A0002
fOUT
fOUT
27
24
155.52
25
106.25
75
A0003
A0004
A0005
A0006
A0007
A0008
A0009
A00010
fOUT
fOUT
fOUT
fOUT
fOUT
fOUT
fOUT
fOUT
72
74.25
50
27
16
13.56
55
96
25
50
55.296
27.648
27.648
55.296
Contact factory for additional
configurations.
AXXXX
fOUT
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.
______________________________________________________________________________________________________________________________________________
DSC2110 DSC2210
Page 3
MK-Q-B-P-D-12050101
Low-Jitter I2C/SPI Programmable CMOS Oscillator
DSC2110 DSC2210
Absolute Maximum Ratings
Ordering Code
Item
Min
Max
Unit Condition
Temp Range
E: -20 to 70
I: -40 to 85
L: -40 to 105
M: -55 to 125
Supply Voltage
Input Voltage
Junction Temp
Storage Temp
Soldering Temp
-0.3
+4.0
V
Prog Mode
1: I2C bus
2: SPI bus
Packing
T: Tape & Reel
: Tube
-0.3 VDD+0.3
V
-
-55
-
+150
+150
+260
°C
°C
°C
V
DSC2 1 10 F I 2
xxxxx
T
40sec max.
ESD
HBM
MM
-
Package
Stability
1: ±50ppm
2: ±25ppm
5: ±10ppm
Freq (MHz)
See Freq. table
4000
400
1500
F: 3.2x2.5mm
CDM
Note: 1000+ years of data retention on internal memory
Specifications (Unless specified otherwise: T=25° C, max CMOS drive strength)
Parameter
Supply Voltage1
Condition
Min.
Typ.
Max.
Unit
V
VDD
IDD
2.25
3.6
23
Supply Current
EN pin low – output is disabled
21
mA
Includes frequency variations due
to initial tolerance, temp. and
power supply voltage
±10
±25
±50
Frequency Stability
Δf
ppm
Aging
Startup Time2
Δf
tSU
1 year @25°C
T=25°C
±5
5
ppm
ms
Input Logic Levels
Input logic high
Input logic low
VIH
VIL
0.75xVDD
-
-
V
0.25xVDD
Output Disable Time3
Output Enable Time
Pull-Up Resistor4
tDA
5
ns
ns
tEN
20
Pull-up exists on all digital IO
40
31
kΩ
CMOS Output
EN pin high – output is enabled
Supply Current4
IDD
35
mA
V
CL=15pF, FO=125 MHz
Output Logic Levels
Output logic high
Output logic low
VOH
VOL
I=±6mA
0.9xVDD
-
-
0.1xVDD
Output Transition time3
Rise Time
20% to 80%
CL=15pf
tR
tF
1.1
1.3
2
2
ns
Fall Time
Commercial/Industrial temp range
Automotive temp range
2.3
45
170
100
Frequency
f0
MHz
Output Duty Cycle
Period Jitter
SYM
JPER
55
2
%
FO=125 MHz
3
psRMS
200kHz to 20MHz @ 125MHz
100kHz to 20MHz @ 125MHz
12kHz to 20MHz @ 125MHz
0.3
0.38
1.7
Integrated Phase Noise
JCC
psRMS
Notes:
1.
Pin 4 VDD should be filtered with 0.01uf capacitor.
2.
3.
4.
tsu is time to 100PPM stable output frequency after VDD is applied and outputs are enabled.
Output Waveform and Test Circuit figures below define the parameters.
Output is enabled if Enable pad is floated or not connected.
______________________________________________________________________________________________________________________________________________
DSC2110 DSC2210 Page 4 MK-Q-B-P-D-12050101
Low-Jitter I2C/SPI Programmable CMOS Oscillator
DSC2110 DSC2210
Nominal Performance Parameters (Unless specified otherwise: T=25° C, VDD=3.3 V)
2.5
25MHz-CMOS
50MHz-CMOS
106MHz-CMOS
125MHz-CMOS
2.0
1.5
1.0
0.5
0.0
0
200
400
600
800
1000
Low-end of integration BW: x kHz to 20 MHz
CMOS Phase jitter (integrated phase noise)
Output Waveform: CMOS
tR
tF
VOH
Output
VOL
tEN
1/fo
tDA
VIH
Enable
VIL
______________________________________________________________________________________________________________________________________________
DSC2110 DSC2210 Page 5 MK-Q-B-P-D-12050101
Low-Jitter I2C/SPI Programmable CMOS Oscillator
DSC2110 DSC2210
Solder Reflow Profile
20-40
Sec
260°C
MSL 1 @ 260°C refer to JSTD-020C
Ramp-Up Rate (200°C to Peak Temp) 3°C/Sec Max.
217°C
200°C
60-150
Sec
Preheat Time 150°C to 200°C
Time maintained above 217°C
Peak Temperature
Time within 5°C of actual Peak
Ramp-Down Rate
60-180 Sec
60-150 Sec
255-260°C
20-40 Sec
6°C/Sec Max.
8 min Max.
Reflow
60-180
Sec
150°C
Cool
Pre heat
25°C
Time 25°C to Peak Temperature
Time
8 min max
Package Dimensions
3.2 x 2.5 mm 14 Lead Plastic Package
Disclaimer:
Micrel makes no representations or warranties with respect to the accuracy or completeness of the information furnished in this data sheet. This information
is not intended as a warranty and Micrel does not assume responsibility for its use. Micrel reserves the right to change circuitry, specifications and
descriptions at any time without notice. No license, whether express, implied, arising by estoppel or otherwise, to any intellectual property rights is granted
by this document. Except as provided in Micrel’s terms and conditions of sale for such products, Micrel assumes no liability whatsoever, and Micrel disclaims
any express or implied warranty relating to the sale and/or use of Micrel products including liability or warranties relating to fitness for a particular purpose,
merchantability, or infringement of any patent, copyright or other intellectual property right.
Micrel Products are not designed or authorized for use as components in life support appliances, devices or systems where malfunction of a product can
reasonably be expected to result in personal injury. Life support devices or systems are devices or systems that (a) are intended for surgical implant into the
body or (b) support or sustain life, and whose failure to perform can be reasonably expected to result in a significant injury to the user. A Purchaser’s use or
sale of Micrel Products for use in life support appliances, devices or systems is a Purchaser’s own risk and Purchaser agrees to fully indemnify Micrel for any
damages resulting from such use or sale.
MICREL, Inc.
Phone: +1 (408) 944-0800
●
●
2180 Fortune Drive,
Fax: +1 (408) 474-1000
San Jose, California
95131
●
●
USA
●
Email: hbwhelp@micrel.com
www.micrel.com
______________________________________________________________________________________________________________________________________________
DSC2110 DSC2210 Page 6 MK-Q-B-P-D-12050101
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