DSC2210FL2-A0026 Crystal-less™ Configurable Clock Generator General Description Features The DSC2210FL2-A0026 is a programmable, high performance LVCMOS oscillators utilizing Micrel's proven silicon MEMS technology to provide excellent jitter and stability while incorporating additional device functionality. The DSC2210FL2-A0026 allows the user to easily modify the frequency using SPI interface. The user can also select from two pre-programmed default output frequencies using the frequency select pin. • Frequency and output formats: - LVCMOS 75/25MHz • Low RMS phase jitter: <1ps (typ) • ±25ppm frequency stability • -40°C to +105°C ext. industrial temperature range • High supply noise rejection: -50dBc • SPI programmable frequency and drive • Excellent shock & vibration immunity - Qualified to MIL-STD-883 • High reliability - 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 Applications • 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 MEMS PLL ÷2 CLK1 75MHz LVCMOS ÷ M1 FS OE VSS Micrel Inc. • 2180 Fortune Drive • San Jose, CA 95131 • USA • tel +1 (408) 944-0800 • fax + 1 (408) 474-1000 • http://www.micrel.com May 11, 2015 2975 Revision 1.0 [email protected] or (408) 955-1690 Micrel, Inc. DSC2210FL2-A0026 Ordering Information Ordering Part Number Industrial Temperature Range Shipping Package DSC2210FL2-A0026 -40°C to +105°C Tube 14-pin 3.2mm x 2.5mm QFN DSC2210FL2-A0026T -40°C to +105°C Tape and Reel 14-pin 3.2mm x 2.5mm QFN VDD2 FS Pin Configuration VDD Devices are Green and RoHS compliant. Sample material may have only a partial top mark. NC SCLK NC GND CLK1 SS_bar NC MISO NC MOSI OE 14-pin 3.2mm x 2.5mm QFN Pin Description Pin Number Pin Name Pin Type 1 OE I 2 NC 3 SCLK I 4 GND PWR 5 MOSI 6 MISO 7 SS_bar 8 CLK1 9 NC Leave unconnected or connect to ground 10 NC Leave unconnected or connect to ground 11 NC Leave unconnected or connect to ground 12, 13 VDD2, VDD PWR 14 FS I May 11, 2015 2975 Pin Function Enables outputs when high and disables outputs when low Leave unconnected or connect to ground SPI serial clock from master to slave Ground SPI serial data from master to slave O SPI serial data from slave to master SPI slave select (active low) O LVCMOS output Power supply Frequency select pin, see Table 2 for details 2 Revision 1.0 [email protected] or (408) 955-1690 Micrel, Inc. DSC2210FL2-A0026 Operational Description The DSC2210FL2-A0026 is a LVCMOS oscillator consisting of a MEMS resonator and a supporting PLL IC. The LVCMOS output is generated through independent 8-bit programmable dividers from the output of the internal PLL. DSC2210FL2-A0026 allows for easy programming of the output frequencies using 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. When OE (pin 1) is floated or connected to VDD, the DSC2210FL2-A0026 is in operational mode. Driving OE to ground will disable both output drivers (hiimpedance mode). DSC2210FL2-A0026 has programmable output drive strength, which can be controlled via 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. Output Drive Strength Bits [OS2, OS1, OS0] - Default is [111] 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 Table 1. Rise/Fall Times for Drive Strengths Output Clock Frequencies Frequency select bits 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. Freq Select Bit [FS] - Default is [1] Freq (MHz) CLK1 0 1 25 75 Table 2. Pin-Selectable Output Frequencies Absolute Maximum Ratings Item Min. Max. Units Supply Voltage -0.3 +4.0 V Input Voltage -0.3 VDD + 0.3 V Junction Temp - +150 °C Storage Temp -55 +150 °C Soldering Temp - +260 °C ESD HBM MM CDM - 4000 400 1500 Condition 40sec max. V 1000+ years of data retention on internal memory May 11, 2015 2975 3 Revision 1.0 [email protected] or (408) 955-1690 Micrel, Inc. DSC2210FL2-A0026 Specifications (Unless specified otherwise: T = 25°C, max LVCMOS drive strength) Parameter Symbol Supply Voltage¹ VDD Supply Current IDD Condition Min. Typ. 2.25 OE pin low - output is disabled 21 Max. Units 3.6 V 23 mA Frequency Stability F Includes frequency variation due to initial tolerance, temp. and power supply voltage ±25 ppm Aging F First year (@ 25°C) ±5 ppm T = 25°C 5 ms 0.25 x VDD V Startup Time² tSU Input Logic Levels Input Logic High Input Logic Low VIH VIL Output Disable Time³ tDA 5 ns Output Enable Time³ tEN 20 ns 4 Pull-Up Resistor 0.75 x VDD - Pull-up exists on all digital IO 40 kOhms LVCMOS Output OE pin high - output is enabled CL = 15pF, F0 = 125MHz Supply Current 4 IDD Output Logic Levels Output Logic High Output Logic Low VOH VOL I = ±6mA Output Transition Time³ Rise Time Fall Time tR tF 20% to 80% CL = 15pF 1.1 1.3 Frequency CLK1 [FS] = [1] 75 Output Duty Cycle SYM Period Jitter JPER F0 = 125MHz Integrated Phase Noise JPH 200kHz to 20MHz @ 125MHz 100kHz to 20MHz @ 125MHz 12kHz to 20MHz @ 125MHz 31 0.9 x VDD - 45 35 mA 0.1 x VDD V 2 2 MHz 55 3 0.3 0.38 1.7 ns % psRMS 2 psRMS Notes: 1. Pin 12 VDD2, and pin 13 VDD should be filtered with 0.1uF capacitors. 2. tSU is time to 100ppm stable output frequency after VDD is applied and outputs are enabled. 3. Output Waveform and Test Circuit figures below define the parameters. 4. Output is enabled if OE pin is floated or not connected. May 11, 2015 2975 4 Revision 1.0 [email protected] or (408) 955-1690 Micrel, Inc. DSC2210FL2-A0026 Nominal Performance Parameters (Unless specified otherwise: T = 25°C, VDD = 3.3V) Figure 1. LVCMOS Phase Jitter (integrated phase noise) LVCMOS Output Waveform Output OE Figure 2. LVCMOS Output Waveform MSL 1 @ 260°C refer to JSTD-020C Ramp-Up Rate (200°C to Peak Temp) 3°C/sec Max. Preheat Time 150°C to 200°C 60 - 180 sec Time maintained above 217°C 60 - 150 sec Peak Temperature 255 - 260°C Time within 5°C of actual Peak 20 - 40 sec Ramp-Down Rate 6°C/sec Max. Time 25°C to Peak Temperature 8 min Max. May 11, 2015 2975 5 Revision 1.0 [email protected] or (408) 955-1690 Micrel, Inc. DSC2210FL2-A0026 Solder Reflow Profile Figure 3. Solder Reflow Profile Package Information6 3.2mm x 2.5mm 14 Lead Plastic Package Notes: 5. Connect the exposed die paddle to ground. 6. Package information is correct as of the publication date. For updates and most current information, go to www.micrel.com. 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. © 2015 Micrel, Incorporated. May 11, 2015 2975 6 Revision 1.0 [email protected] or (408) 955-1690