SY89311U 2.5V/3.3V/5V 1:2 DIFFERENTIAL PECL/LVPECL/ECL FANOUT BUFFER Precision Edge® General Description The SY89311U is a precision, high-speed 1:2 differential fanout buffer. Having within-device skews and output transition times significantly improved over the EL11V, the SY89311U is ideally suited for those applications which require the ultimate in AC performance in a small package. The differential inputs of the SY89311U employ clamping circuitry to maintain stability under open input conditions. If the inputs are left open, the Q outputs will be LOW. The differential inputs can accept 10/100K ECL/PECL signals (external termination required) and the outputs are 100K ECL/PECL compatible. Datasheets and support documentation are available on Micrel’s web site at: www.micrel.com. Features • 2.5V, 3.3V and 5V power supply • Guaranteed AC parameters over temperature: − fMAX > 3.0GHz − <20ps output-to-output skew − <200ps tr / tf − <300ps propagation delay − 51fs(RMS) phase jitter (typical) • 100K compatible I/O • Wide temperature range: –40°C to +85°C • Available in ultra-small 8-pin MLF® (2mm x 2mm) package Block Diagram Precision Edge is a registered trademark of Micrel, Inc. MicroLeadFrame and MLF are registered trademarks of Amkor Technology, Inc. Micrel Inc. • 2180 Fortune Drive • San Jose, CA 95131 • USA • tel +1 (408) 944-0800 • fax + 1 (408) 474-1000 • http://www.micrel.com April 8, 2014 040814-5.0 [email protected] or (408) 955-1690 Micrel, Inc. SY89311U Ordering Information Part Number SY89311UMITR (1) SY89311UMGT Package Type MLF-8 MLF-8 Operating Range Industrial Industrial Package Marking 311 311 with Pb-Free bar-line indicator Lead Finish Sn-Pb Pb-Free NiPdAu Note: 1. Other voltages are available. Contact Micrel for details. Pin Configuration ® 8-Pin MLF Ultra-Small Outline (2mm x 2mm) Pin Description Pin Number Pin Name Type 1, 2, 3, 4 Q0, /Q0, Q1, /Q1 100K Output 5 VEE, Exposed Pad Negative Power Supply 6 /IN 100K Input 7 IN 100K Input 2 5 Positive Power Supply April 8, 2014 Pin Function Differential PECL/ECL Outputs: Default to LOW if IN inputs are left open. Q1, /Q1 See “Output Interface Applications” section for recommendations on terminations. Unused output pairs may be left floating without any impact on skew or jitter. Negative Power Supply: VEE and exposed pad must be tied to most negative supply. For PECL/LVPECL connect to ground. Differential PECL/ECL Input: Internal 75kΩ pull-up and pull-down resistors. If left floating, pin defaults to VCC/2. When not used, this input can be left open. See “Input Interface Applications” section for single-ended inputs. Differential PECL/ECL Input: Internal 75kΩ pull-down resistor. If left open, pin defaults LOW. Q output will be LOW. Accepts differential 10K and 100K ECL/PECL. See “Input Interface Applications” section for single-ended inputs. Positive Power Supply: Bypass with 0.1µF//0.01µF low ESR capacitors 2 040814-5.0 [email protected] or (408) 955-1690 Micrel, Inc. SY89311U Absolute Maximum Ratings(Error! Reference source not found.) Operating Ratings(Error! Reference source not found.) Supply Voltage (VCC) ..................................... -0.5V to +6.0V Input Voltage (VIN) ............................................... -0.5 to VCC LVPECL Output Current (IOUT) Continuous............................................................ 50mA Surge .................................................................. 100mA Input Current Source or sink current on IN, /IN ........................ ±50mA Lead Temperature (soldering, 20 sec.) .................... +260°C Storage Temperature (TS) ......................... -65°C to +150°C Supply Voltage |VCC-VEE|...................... +2.375V to +2.625V .............................................................. +3.0V to +3.6V .............................................................. +4.5V to +5.5V Ambient Temperature (TA) .......................... –40°C to +85°C Package Thermal Resistance, Note 3 MLF™ (θJA) Still-Air ............................................................... 93°C/W 500lfpm .............................................................. 87°C/W MLF™ (θJB) Junction-to-Board .............................................. 60°C/W DC Electrical Characteristics(3) TA = –40°C to +85°C Symbol Parameter Condition VCC Power Supply Voltage LVPECL LVPECL PECL ECL LVECL LVECL IEE Power Supply Current Max. VCC, no load IIH Input HIGH Current VIN = VIH IIL Input Low Current CIN Input Capacitance IN /IN VIN = VIL VIN = VIL Min. Typ. Max. Units 2.375 3.0 4.5 -5.5 -3.6 -2.625 2.5 3.3 5.0 -5.0 -3.3 -2.5 2.625 3.6 5.5 -4.5 -3.0 -2.375 V V V V V V 30 44 mA 150 µA 0.5 -150 µA µA 1.0 pF (100K) ECL/LVECL DC Electrical Characteristics VCC = +2.5V ±5% or +3.3V ±10% or +5.0V ±10% and VEE = 0V; VCC = 0V and VEE = –2.5V ±5% or –3.3V ±10% or –5.0V ±10%; RL = 50Ω to VCC–2V; TA = –40°C to +85°C, unless otherwise noted. Symbol Parameter VOH Output HIGH Voltage VOL Condition Min. Typ. Max. Units VCC –1.145 VCC –0.895 V Output LOW Voltage VCC –1.945 VCC –1.695 V VIH Input HIGH Voltage VCC –1.225 VCC –0.88 V VIL Input LOW Voltage VCC –1.945 VCC –1.625 V VIHCMR Input HIGH Voltage Common Mode Range Note 6 VEE +1.2 VCC V IIH Input HIGH Current VIN = VIH 150 µA IIL Input LOW Current (IN) VIN = VIL 0.5 µA Input LOW Current (/IN) VIN = VIL -150 µA Notes: 2. Permanent device damage may occur if absolute maximum ratings are exceeded. This is a stress rating only and functional operation is not implied at conditions other than those detailed in the operational sections of this data sheet. Exposure to absolute maximum rating conditions for extended periods may affect device reliability. 3. The data sheet limits are not guaranteed if the device is operated beyond the operating ratings. 4. Package Thermal Resistance values assume exposed pad is soldered (or equivalent) to the device's most negative potential on the PCB. 5. This circuit is designed to meet the DC specifications shown in the above table after thermal equilibrium has been established. 6. VIHCMR (min) varies 1:1 with VEE, (max) varies 1:1 with VCC. April 8, 2014 3 040814-5.0 [email protected] or (408) 955-1690 Micrel, Inc. SY89311U AC Electrical Characteristics(7) VCC = +2.5V ±5% or +3.3V ±10% or +5.0V ±10% and VEE = 0V; VCC = 0V and VEE = –2.5V ±5% or –3.3V ±10% or –5.0V ±10%; RL = 50Ω to VCC–2V; TA = –40°C to +85°C, unless otherwise noted. Symbol Parameter fMAX Maximum Toggle Frequency tpd Propagation Delay (Differential) Condition Within-Device Skew Part-to-Part Skew tJITTER Typ. Max. Units 3 IN to Q, /Q IN to Q, /Q tSKEW Min. Q, /Q VCC = 3.3V/5V VCC = 2.5V 140 170 Note 8 GHz 220 240 300 360 ps ps 5 20 ps 150 120 ps ps 1 ps(rms) VCC = 3.3V/5V, Note 8 VCC = 2.5V, Note 8 Cycle-to-Cycle Jitter (rms) Additive Phase Jitter 622MHz over 12kHz-20MHz VDIFF Input Swing Note 9 tr, tf Output Rise/Fall Time (20% to 80%) 51 fs(rms) 150 800 1200 mV 70 120 200 ps Notes: 7. Measured with 750mV input signal, 50% duty cycle. VDIFF_OUT is ≥ 400mV. 8. Skew is measured between outputs under identical transitions. Duty cycle skew is defined only for differential operation when the delays are measured from the cross point of the inputs to the cross point of the outputs. 9. See “Input Waveform”. April 8, 2014 4 040814-5.0 [email protected] or (408) 955-1690 Micrel, Inc. SY89311U Additive Phase Noise Plot VCC = +3.3V, GND = 0, RL = 50Ω to VCC–2V, TA = 25°C April 8, 2014 5 040814-5.0 [email protected] or (408) 955-1690 Micrel, Inc. SY89311U Input Waveform Input Interface Applications Figure 1. Single-Ended Input (Terminating unused Input) April 8, 2014 6 040814-5.0 [email protected] or (408) 955-1690 Micrel, Inc. SY89311U LVPECL Output Interface Applications Figure 2. Parallel Thevenin-Equivalent Termination Figure 3. Three Resistor “Y Termination” Figure 4. Termination Unused I/O April 8, 2014 7 040814-5.0 [email protected] or (408) 955-1690 Micrel, Inc. SY89311U Package Information(10) 8-Lead MLF (MLF-8) Note: 10. Package information is correct as of the publication date. For updates and most current information, go to www.micrel.com. April 8, 2014 8 040814-5.0 [email protected] or (408) 955-1690 Micrel, Inc. SY89311U MICREL, INC. 2180 FORTUNE DRIVE SAN JOSE, CA 95131 USA TEL +1 (408) 944-0800 FAX +1 (408) 474-1000 WEB http://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. © 2006 Micrel, Incorporated. April 8, 2014 9 040814-5.0 [email protected] or (408) 955-1690 Micrel, Inc. SY89311U Revision History Date Change Description/Edits by: 8/4/10 Added new paragraph to disclaimer in boiler plate. Per Colin Sturt. M.Galvan 14 1/16/13 Complete rework 15 April 8, 2014 Rev. 10 040814-5.0 [email protected] or (408) 955-1690