DSC2030FE5-B0018 [MICROCHIP]
Crystal-less⢠Configurable Clock Generator;
| 型号： | DSC2030FE5-B0018 |
| 厂家： | 
MICROCHIP |
| 描述： | Crystal-less⢠Configurable Clock Generator |
| 文件： | 总6页 (文件大小：1386K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
DSC2030FE5-B0018
Crystal-less™ Configurable Clock Generator
General Description
Features
The DSC2030FE5-B0018 is a high performance
LVDS oscillator utilizing Microchip's proven silicon
MEMS technology to provide excellent jitter and
stability while incorporating additional device
functionality.
The DSC2030FE5-B0018 allows the user to easily
modify the frequency of the oscillators using FS pins.
The DSC2030FE5-B0018 has provision for up to four
user-defined pre-programmed, pin-selectable output
frequencies.
• Frequency and output formats:
- LVDS
100/25/50/74.25MHz
• Low RMS phase jitter: <1ps (typ)
• ±10ppm frequency stability
• -20°C to +70°C ext. commercial temperature range
• High supply noise rejection: -50dBc
• 4 Pin-selectable output frequencies
• Excellent shock & vibration immunity
- Qualified to MIL-STD-883
• High reliability
Applications
- 20x better MTF than quartz oscillators
• Supply range of 2.25 to 3.6V
• AEC-Q100 automotive qualified
• 14-pin 3.2mm x 2.5mm QFN package
• Consumer Electronics
• Storage Area Networks
- SATA, SAS, Fibre Channel
• Passive Optical Networks
- EPON, 10G-EPON, GPON, 10G-GPON
• Ethernet
- 1G, 10GBASE-T/KR/LR/SR, and FCoE
• HD/SD/SDI Video & Surveillance
• PCI Express
• Automotive
Block Diagram
VDD/VDD2
Control Circuitry
CLK1+
MEMS
PLL
÷ 2
÷ M1
CLK1-
100MHz LVDS
FS0/FS1
OE
VSS
ClockWorks is a registered trademark of Microchip Technology Inc.
Microchip Technology Inc.
http://www.microchip.com
February 28, 2017
4944
Revision 1.0
tcghelp@microchip.com
Microchip Technology Inc.
DSC2030FE5-B0018
Ordering Information
Ordering Part Number
DSC2030FE5-B0018
DSC2030FE5-B0018T
Industrial Temperature Range
-20°C to +70°C
Shipping
Tube
Package
14-pin 3.2mm x 2.5mm QFN
14-pin 3.2mm x 2.5mm QFN
-20°C to +70°C
Tape and Reel
Devices are Green and RoHS compliant. Sample material may have only a partial top mark.
Pin Configuration
OE
NC
NC
NC
NC
CLK1-
CLK1+
GND
14-pin 3.2mm x 2.5mm QFN
Pin Description
Pin Number
Pin Name
OE
Pin Type
Pin Function
Enables outputs when high and disables outputs when low
Leave unconnected or connect to ground
Leave unconnected or connect to ground
Ground
1
I
2
NC
3
NC
4
5
GND
FS0
PWR
I
I
Least significant bit for frequency selection, see Table 1 for details
Most significant bit for frequency selection, see Table 1 for details
Leave unconnected or connect to ground
Positive LVDS output
6
FS1
7
NC
8
CLK1+
CLK1-
NC
O
O
9
Negative LVDS output
10
11
12, 13
14
Leave unconnected or connect to ground
Leave unconnected or connect to ground
Power supply
NC
VDD2, VDD
NC
PWR
Leave unconnected or connect to ground
February 28, 2017
4944
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Revision 1.0
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Microchip Technology Inc.
DSC2030FE5-B0018
Operational Description
The DSC2030FE5-B0018 is a LVDS oscillator
consisting of a MEMS resonator and a supporting
PLL IC. The LVDS output is generated through
independent 8-bit programmable dividers from the
output of the internal PLL.
When OE (pin 1) is floated or connected to VDD,
the DSC2030FE5-B0018 is in operational mode.
Driving OE to ground will tri-state output driver
(hi-impedance mode).
The actual frequency output by DSC2030FE5-B0018
is controlled by an internal pre-programmed memory
(OTP). This memory stores all coefficients required
by the PLL for up to four different frequencies.
Two control pins (FS0, FS1) select the output
frequency.
Output Clock Frequencies
Frequency select bits are weakly tied high so if left unconnected the default setting will be [11] and the device will output the
associated frequency highlighted in bold.
Freq Select Bits [FS1, FS0] - Default is [11]
Freq (MHz)
00
01
10
11
CLK1
25
50
74.25
100
Table 1. Pin-Selectable Output Frequencies
Absolute Maximum Ratings
Item
Min.
-0.3
-0.3
-
Max.
+4.0
Units
Condition
Supply Voltage
Input Voltage
Junction Temp
Storage Temp
Soldering Temp
V
V
VDD + 0.3
+150
°C
°C
°C
-55
-
+150
+260
40sec max.
ESD
HBM
MM
4000
400
-
V
CDM
1500
1000+ years of data retention on internal memory
February 28, 2017
4944
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Microchip Technology Inc.
DSC2030FE5-B0018
Specifications (Unless specified otherwise: T = 25°C)
Parameter
Symbol
VDD
Condition
Min.
Typ.
Max.
3.6
Units
V
Supply Voltage¹
Supply Current
2.25
IDD
OE pin low - output is disabled
21
29
23
mA
OE pin high - output is enabled
RL = 100Ohms, F0 = 156.25MHz
Supply Current²
IDD
F
32
mA
Includes frequency variation due to initial
tolerance, temp. and power supply voltage
Frequency Stability
±10
ppm
Aging
F
First year (@ 25°C)
T = 25°C
±5
5
ppm
ms
Startup Time³
tSU
Input Logic Levels
Input Logic High
Input Logic Low
VIH
VIL
0.75 x VDD
-
-
V
0.25 x VDD
Output Disable Time4
Output Enable Time
Pull-Up Resistor²
tDA
tEN
5
ns
ns
20
Pull-up exists on all digital IO
LVDS Output
40
kOhms
Output Offset Voltage
Delta Offset Voltage
Pk to Pk Output Swing
R = 100Ohms Differential
1.125
1.4
50
V
mV
mV
Single-Ended
350
200
100
Output Transition Time4
Rise Time
20% to 80%
RL = 100Ohms, CL = 2pF
tR
tF
350
52
ps
Fall Time
Frequency
CLK1
SYM
JPER
[FS1, FS0] = [1, 1]
Differential
MHz
%
Output Duty Cycle
Period Jitter5
48
F0 = 156.25MHz
2.5
psRMS
200kHz to 20MHz @ 156.25MHz
100kHz to 20MHz @ 156.25MHz
12kHz to 20MHz @ 156.25MHz
0.28
0.4
1.7
Integrated Phase Noise
JPH
2
psRMS
Notes:
1. Pin 12 VDD2, and pin 13 VDD should be filtered with 0.1uF capacitors.
2. Output is enabled if OE pin is floated or not connected.
3. tSU is time to 100ppm stable output frequency after VDD is applied and outputs are enabled.
4. Output Waveform and Test Circuit figures below define the parameters.
5. Period Jitter includes crosstalk from adjacent output.
February 28, 2017
4944
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Microchip Technology Inc.
DSC2030FE5-B0018
Nominal Performance Parameters (Unless specified otherwise: T = 25°C, VDD = 3.3V)
Figure 1. LVDS Phase Jitter (integrated phase noise)
LVDS Output Waveform
350
OE
Figure 2. LVDS Output Waveform
MSL 1 @ 260°C refer to JSTD-020C
Ramp-Up Rate (200°C to Peak Temp)
Preheat Time 150°C to 200°C
Time maintained above 217°C
Peak Temperature
3°C/sec Max.
60 - 180 sec
60 - 150 sec
255 - 260°C
20 - 40 sec
Time within 5°C of actual Peak
Ramp-Down Rate
6°C/sec Max.
8 min Max.
Time 25°C to Peak Temperature
February 28, 2017
4944
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Microchip Technology Inc.
DSC2030FE5-B0018
Solder Reflow Profile
Figure 3. Solder Reflow Profile
Package Information7
3.2mm x 2.5mm 14 Lead Plastic Package
Notes:
6. Connect the exposed die paddle to ground.
7. Package information is correct as of the publication date. For updates and most current information, go to www.microchip.com.
Microchip 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 Microchip does not assume responsibility for its use. Microchip 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 Microchip's terms and
conditions of sale for such products, Microchip assumes no liability whatsoever, and Microchip disclaims any express or implied warranty
relating to the sale and/or use of Microchip products including liability or warranties relating to fitness for a particular purpose,
merchantability, or infringement of any patent, copyright or other intellectual property right.
Microchip 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 Microchip Products for use in life support appliances, devices
or systems is a Purchaser's own risk and Purchaser agrees to fully indemnify Microchip for any damages resulting from such use or sale.
© 2017 Microchip Technology Inc.
February 28, 2017
4944
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Revision 1.0
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