Configurable Four Output, Low Jitter Crystal-less™ Clock Generator
Features
• Low RMS Phase Jitter: <1 ps (typ.)
• High Stability: ±25 ppm, ±50 ppm
• Wide Temperature Range:
- Industrial –40°C to +85°C
- Ext. Commercial –20°C to +70°C
• High Supply Noise Rejection: –50 dBc
• Four Format-Configurable Outputs:
- LVPECL, LVDS, HCSL, LVCMOS
• Available Pin-Selectable Frequency Table
- 1 Pin per Bank for 2 Frequency Sets
• Wide Frequency Range:
- 2.3 MHz – 460 MHz
• 20-Pin QFN Footprint (5.0 mm x 3.2 mm)
• Excellent Shock and Vibration Immunity
• High Reliability
- 20x better MTF than quartz-based devices
• Wide Supply Range of 2.25V to 3.6V
• Lead Free and RoHS-Compliant
• AEC-Q100 Automotive Qualified
General Description
The DSC400 is a four output crystal-less™ clock
generator. It utilizes proven PureSilicon™ MEMS
technology to provide excellent jitter and stability while
incorporating additional device functionality.
The nominal frequencies of the outputs can be identical
or independently derived from common PLLs.
Each output may be configured independently to
support a single-ended LVCMOS interface or a
differential interface. Differential options include
LVPECL, LVDS, or HCSL.
The DSC400 provides two independent select lines for
choosing between two sets of pre-configured
frequencies per bank. It also has two OE pins to allow
for enabling and disabling outputs.
The DSC400 is packaged in a 20-pin QFN (5 mm x
3.2 mm) and is available in extended commercial and
industrial temperature grades.
Block Diagram
CONTROL
CIRCUITRY
BANK 1
MEMS
PLL
OUTPUT
CONTROL
AND
DIVIDERS
BANK 2
FSB1
FSB2
CLK2+
CLK2-
CLK3+
CLK3-
CLK0+
CLK0-
Applications
• Communications and Networks
• Ethernet
- 1G, 10GBASE-T/KR/LR/SR, and FCoE
• Storage Area Networks
- SATA, SAS, Fibre Channel
• Passive Optical Networks
- EPON, 10G-EPON, GPON, 10G-PON
• HD/SD/SDI Video and Surveillance
• Automotive
• Media and Video
• Embedded and Industrial
PLL
OE1
OE2
CLK1+
CLK1-
2016 Microchip Technology Inc.
DS20005612A-page 1
DSC400
1.0
ELECTRICAL CHARACTERISTICS
Absolute Maximum Ratings †
Supply Voltage .......................................................................................................................................... –0.3V to +4.0V
Input Voltage .......................................................................................................................................–0.3V to V
测试/测量
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