DSC2211FL2-E0018 Crystal-less™ Configurable Clock Generator General Description Features The DSC2211FL2-E0018 is a programmable, high performance dual LVCMOS output oscillator utilizing Micrel's proven silicon MEMS technology to provide excellent jitter and stability while incorporating high output frequency flexibility and drive strength control. The DSC2211FL2-E0018 allows the user to independently modify the frequency of each output and LVCMOS drive strength 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 25/27MHz - LVCMOS 125/24MHz • 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 VDD/VDD2 Block Diagram Control Circuitry MEMS ÷2 ÷ M1 CLK1 25MHz LVCMOS ÷2 ÷ M2 CLK2 125MHz LVCMOS PLL 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 2973 Revision 1.0 [email protected] or (408) 955-1690 Micrel, Inc. DSC2211FL2-E0018 Ordering Information Ordering Part Number Industrial Temperature Range Shipping Package DSC2211FL2-E0018 -40°C to +105°C Tube 14-pin 3.2mm x 2.5mm QFN DSC2211FL2-E0018T -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 CLK2 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 O SPI serial data from slave to master 7 SS_bar I SPI slave select (active low) 8 CLK1 O LVCMOS output 9 NC Leave unconnected or connect to ground 10 NC Leave unconnected or connect to ground 11 CLK2 O 12 VDD2 PWR Power supply for LVCMOS output CLK2, 1.65V to 3.6V (VDD2 ≤ VDD) 13 VDD PWR Power supply 14 FS I May 11, 2015 2973 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 LVCMOS output Frequency select pin, see Table 2 for details 2 Revision 1.0 [email protected] or (408) 955-1690 Micrel, Inc. DSC2211FL2-E0018 Operational Description The DSC2211FL2-E0018 is a dual output LVCMOS oscillator consisting of a MEMS resonator and a supporting PLL IC. The two LVCMOS outputs are generated through independent 8-bit programmable dividers from the output of the internal PLL. DSC2211FL2-E0018 allows for easy programming of theoutput frequencies using SPI interface. Upon power-up, the output frequencies are controlled by an internal pre-programmed memory (OTP). This memory stores all coefficients required by the PLL for two different default frequency pairs. The control pin (FS) selects the initial pair. Once the device is powered up, a new output frequency pair can be programmed using SPI pins. Programming details are provided in the Programming Guide. The DSC2211FL2-E0018 has independent control of the output voltage levels of the two outputs. The high voltage level of CLK1 is equal to the main supply voltage, VDD (pin 13). VDD2 (pin 12) sets the high voltage level of CLK2. VDD2 must be equal to or less than VDD at all times to insure proper operation. VDD2 can be as low as 1.65V. When OE (pin 1) is floated or connected to VDD, the DSC2211FL2-E0018 is in operational mode. Driving OE to ground will disable both output drivers (hi-impedance mode). DSC2211FL2-E0018 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 [OXS2, OXS1, OXS0] - Default is [111] - X = 1 for CLK1, and 2 for CLK2 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) 0 1 CLK1 27 25 CLK2 24 125 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 2973 3 Revision 1.0 [email protected] or (408) 955-1690 Micrel, Inc. DSC2211FL2-E0018 Specifications (Unless specified otherwise: T = 25°C, max LVCMOS drive strength) Parameter Symbol Condition Min. Typ. Max. Units Supply Voltage¹ VDD 2.25 3.6 V Supply Voltage (CLK2)¹ VDD2 1.65 3.6 V Supply Current IDD OE pin low - outputs are disabled 21 23 mA Supply Current² IDD OE pin high - outputs are enabled CL = 15pF, F01 = F02 = 125MHz 32 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 Time³ tSU Input Logic Levels Input Logic High Input Logic Low VIH VIL Output Disable Time4 tDA 5 ns Output Enable Time tEN 20 ns Pull-Up Resistor² 0.75 x VDD - Pull-up exists on all digital IO 40 kOhms LVCMOS Outputs Output Logic Levels Output Logic High Output Logic Low VOH VOL I = ±6mA Output Transition Time4 Rise Time Fall Time tR tF 20% to 80% CL = 15pF 1.1 1.4 CLK1 CLK2 [FS] = [1] 25 125 Frequency Output Duty Cycle 5 0.9 x VDD - SYM 0.1 x VDD 45 Period Jitter JPER F01 = F02 = 125MHz Integrated Phase Noise JPH 200kHz to 20MHz @ 125MHz 100kHz to 20MHz @ 125MHz 12kHz to 20MHz @ 125MHz 2 2 ns MHz 55 3 0.3 0.38 1.7 V % psRMS psRMS 2 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. May 11, 2015 2973 4 Revision 1.0 [email protected] or (408) 955-1690 Micrel, Inc. DSC2211FL2-E0018 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 2973 5 Revision 1.0 [email protected] or (408) 955-1690 Micrel, Inc. DSC2211FL2-E0018 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.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 2973 6 Revision 1.0 [email protected] or (408) 955-1690