DSC2311KL1-R0021 Crystal-less™ Configurable Clock Generator General Description Features DSC2311KL1-R0021 is a crystal-less clock generator that is factory configurable to simultaneously output two separate frequencies from 2.3 to 170MHz. The clock generator uses proven silicon MEMS technology to provide low jitter and high frequency stability across a wide range of supply voltages and temperatures. By eliminating the external quartz crystal, crystal-less clock generators significantly enhance reliability and accelerate product development, while meeting stringent clock performance criteria for a variety of consumer electronics, communications, and storage applications. DSC2311KL1-R0021 has an output enable/disable feature allowing it to disable the outputs when OE is low. The device is available in a space-saving 6-pin 2.5mm x 2.0mm TDFN package that needs only a single external bypass capacitor. This requires a PCB footprint equivalent to that of a 1.0mm x 1.0mm crystal-based clock generator. • Two simultaneous LVCMOS outputs: - 25MHz - 50MHz • Low RMS phase jitter: <1ps (typical) • ±50ppm frequency stability • -40°C to +105°C ext. industrial temperature range • High supply noise rejection: -50dBc • High shock & vibration immunity - Qualified to MIL-STD-883 • High reliability - 20x higher MTBF than crystal-based clock generator designs • Programmable output strength for EMI reduction and signal integrity optimization • Supply range of 2.25 to 3.6V • AEC-Q100 automotive qualified • 6-pin 2.5mm x 2.0mm TDFN package Applications • Consumer Electronics • Camera and Imaging Modules • Home Automation • Industrial and Power Conversion • Mobile Communications, Internet, and Sensor Devices • Solid State, Hard Drive, and Flash Drive Storage • Automotive Block Diagram Control Circuitry MEMS ÷ M1 CLK0 25MHz LVCMOS ÷ M2 CLK1 50MHz LVCMOS PLL OE 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 10, 2015 2966 Revision 1.0 [email protected] or (408) 955-1690 Micrel, Inc. DSC2311KL1-R0021 Ordering Information Ordering Part Number Industrial Temperature Range Shipping Package DSC2311KL1-R0021 -40°C to +105°C Tube 6-pin 2.5mm x 2.0mm TDFN DSC2311KL1-R0021T -40°C to +105°C Tape and Reel 6-pin 2.5mm x 2.0mm TDFN Devices are Green and RoHS compliant. Sample material may have only a partial top mark. Pin Configuration OE VDD DNC CLK1 GND CLK0 6-pin 2.5mm x 2.0mm TDFN Pin Description Pin Number Pin Name Pin Type 1 OE I 2 DNC 3 GND PWR 4 CLK0 O LVCMOS CLK0 output frequency = 25MHz 5 CLK1 O LVCMOS CLK1 output frequency = 50MHz 6 VDD PWR May 10, 2015 2966 Pin Level Pin Function Active high output enable for CLK0 and CLK1 Leave unconnected or connect to the ground Power supply ground Power supply 2 Revision 1.0 [email protected] or (408) 955-1690 Micrel, Inc. DSC2311KL1-R0021 Specifications (Unless specified otherwise: T = 25°C, VDD = 3.3V) Parameter Symbol Supply Voltage¹ VDD Supply Current² IDD Condition Min. Typ. 2.25 OE pin low - outputs are disabled 21 ±50 Max. Units 3.6 V 23 mA Frequency Stability 6 F Includes frequency variation due to initial tolerance, temp. and power supply voltage Aging F First year (@ 25°C) ±5 ppm T = 25°C 5 ms 0.25 x VDD V ppm Startup Time³ tSU Input Logic High Input Logic Low VIH VIL Output Disable Time 4 tDA 5 ns Output Enable Time 4 tEN 20 ns Pull-Up Resistor² 0.75 x VDD - Pull-up exists on pin 1 Output Logic High Output Logic Low VOH VOL I = ±6mA Output Transition Time 4 Rise Time Fall Time tR tF 20% to 80% CL = 15pF F0 F1 CLK0 CLK1 Frequency Output Duty Cycle Period Jitter 5 Integrated Phase Noise 40 0.9 x VDD - kOhms 0.1 x VDD 1.1 1.43 2 2 25 50 SYM 45 JPER CLK0 = CLK1 = 25MHz JCC 200kHz to 20MHz @ 25MHz 100kHz to 20MHz @ 25MHz 12kHz to 20MHz @ 25MHz 3 Notes: 1. Pin 4 VDD should be filtered with 0.1uF capacitor. 2. Output is enabled if OE pad is high or not connected. Supply current = Disabled Current + Consumption graph on next page. 3. tSU is time to stable output frequency after VDD is applied and outputs are enabled. 4. See Figure 3 for detail (all based on maximum drive settings). 5. Period Jitter includes crosstalk from adjacent output. 6. For other ppm stabilities, contact the factory at [email protected]. IDD from CLK0 + ns MHz 55 0.3 0.38 1.7 V % psRMS psRMS 2 IDD from CLK1. See Current 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 - May 10, 2015 2966 4000 400 1500 3 Condition 40sec max. V Revision 1.0 [email protected] or (408) 955-1690 Micrel, Inc. DSC2311KL1-R0021 Current Consumption Figure 1. Total Current = Disabled Current + IDD Fout1 + IDD Fout2 Solder Reflow Profile Figure 2. Solder Reflow Profile 6 QFN 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 10, 2015 2966 4 Revision 1.0 [email protected] or (408) 955-1690 Micrel, Inc. DSC2311KL1-R0021 OE Function and Output Waveform Output OE Figure 3. OE Function and Output Waveform Package Information7 6-pin TDFN (2.5mm x 2.0mm) Note: 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 10, 2015 2966 5 Revision 1.0 [email protected] or (408) 955-1690