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| Micrel, Inc. 2.5V/3.3V/5V 1:2 DIFFERENTIAL PECL/LVPECL/ECL FANOUT BUFFER Precision Edge(R) SY89311U Precision Edge(R) SY89311U 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 100K compatible I/O Wide temperature range: -40C to +85C Available in ultra-small 8-pin MLF(R) (2mm x 2mm) package Precision Edge(R) 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. BLOCK DIAGRAM Q0 IN PECL /IN Q1 /Q1 /Q0 PECL Precision Edge is a registered trademark of Micrel, Inc. MicroLeadFrame and MLF are registered trademarks of Amkor Technology, Inc. M9999-092606 hbwhelp@micrel.com or (408) 955-1690 Rev.: D Amendment: /0 1 Issue Date: September 2006 Micrel, Inc. Precision Edge(R) SY89311U PACKAGE/ORDERING INFORMATION Q0 /Q0 Q1 /Q1 1 2 3 4 8 7 6 5 VCC IN /IN VEE Ordering Information Part Number SY89311UMITR SY89311UMGTR(1) Note: 1. Pb-Free package is recommended for new designs. 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 8-Pin MLF(R) Ultra-Small Outline (2mm x 2mm) PIN DESCRIPTION Pin Number 1, 2, 3, 4 Pin Name Q0, /Q0, Q1, /Q1 Type 100K Output Pin Function Differential PECL/ECL Outputs: Default to LOW if IN inputs are left open. See"Output Interface Applications" section for recommendations on terminations. Unused output pairs may be left floating without any inpact 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 75k 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 75k 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 0.1F//0.01F low ESR capacitors. 5 6 VEE, Exposed Pad /IN Negative Power Supply 100K Input 7 IN 100K Input 8 VCC Positive Power Supply M9999-092606 hbwhelp@micrel.com or (408) 955-1690 2 Micrel, Inc. Precision Edge(R) SY89311U Absolute Maximum Ratings(1) Supply Voltage (VCC) .................................. -0.5V to +6.0V Input Voltage (VIN) ......................................... -0.5V 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.) ................... +260C Storage Temperature (TS) ....................... -65C to +150C Operating Ratings(2) Supply Voltage |VCC-VEE| .................. +2.375V to +2.625V ............................................................ +3.0V to +3.6V ............................................................ +4.5V to +5.5V Ambient Temperature (TA) ......................... -40C to +85C Package Thermal Resistance, Note 3 MLFTM (JA) Still-Air ................................................................. 93C/W 500lfpm ............................................................... 87C/W MLFTM (JB) Junction-to-Board ................................................ 60C/W DC ELECTRICAL CHARACTERISTICS(4) TA = -40C to +85C Symbol VCC Parameter Power Supply Voltage Condition LVPECL LVPECL PECL ECL LVECL LVECL Max. VCC, no load VIN = VIH IN /IN VIN = VIL VIN = VIL 0.5 -150 1.0 Min 2.375 3.0 4.5 -5.5 -3.6 -2.625 Typ 2.5 3.3 5.0 -5.0 -3.3 -2.5 30 Max 2.625 3.6 5.5 -4.5 -3.0 -2.375 44 150 Units V V V V V V mA A A A pF IEE IIH IIL CIN Power Supply Current Input HIGH Current Input LOW Current Input Capacitance (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 = 50 to VCC-2V; TA = -40C to +85C, unless otherwise noted. Symbol VOH VOL VIH VIL VIHCMR IIH IIL Parameter Output HIGH Voltage Output LOW Voltage Input HIGH Voltage Input LOW Voltage Input HIGH Voltage Common Mode Range Input HIGH Current Input LOW Current (IN) Input LOW Current (/IN) Notes: 1. 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 ratlng conditions for extended periods may affect device reliability. 2. The data sheet limits are not guaranteed if the device is operated beyond the operating ratings. 3. Package Thermal Resistance values assume exposed pad is soldered (or equivalent) to the device's most negative potential on the PCB. 4. This circuit is designed to meet the DC specifications shown in the above table after thermal equilibrium has been established. 5. VIHCMR (min) varies 1:1 with VEE, (max) varies 1:1 with VCC. M9999-092606 hbwhelp@micrel.com or (408) 955-1690 Condition Min VCC-1.145 VCC-1.945 VCC-1.225 VCC-1.945 Typ Max VCC-0.895 VCC-1.695 VCC-0.88 VCC-1.625 VCC 150 Units V V V V V A A A Note 5 VIN = VIH VIN = VIL VIN = VIL VEE+1.2 0.5 -150 3 Micrel, Inc. Precision Edge(R) SY89311U AC ELECTRICAL CHARACTERISTICS(6) 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 or -5.0V 10%; RL = 50 to VCC-2V; TA = -40C to +85C, unless otherwise noted. Symbol fMAX tpd Parameter Maximum Toggle Frequency Propagation Delay (Differential) IN to Q, /Q IN to Q, /Q Within-Device Skew Part-to-Part Skew tJITTER VDIFF tr, tf Notes: 6. Measured with 750mV input signal, 50% duty cycle. VDIFF_OUT is 400mV. 7. 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. 8. See "Input Waveform." Condition Min 3 Typ Max Units GHz VCC = 3.3V/5V VCC = 2.5V Note 7 VCC = 3.3V/5V, Note 7 VCC = 2.5V, Note 7 Note 8 140 170 220 240 5 300 360 20 150 120 1 ps ps ps ps ps ps(rms) mV ps tSKEW Q, /Q Cycle-to-Cycle Jitter (rms) Input Swing Output Rise/Fall Time (20% to 80%) 150 70 800 120 1200 200 INPUT WAVEFORM IN VIHCMR VDIFF = 150mV to 1200mV /IN M9999-092606 hbwhelp@micrel.com or (408) 955-1690 4 Micrel, Inc. Precision Edge(R) SY89311U INPUT INTERFACE APPLICATIONS VCC R1 IN VCC VCC -1.3V VCC = 2.5V; R1 = 1k, R2 = 900 VCC = 3.3V; R1 = 1k, R2 = 1.6k VCC = 5V; R1 = 1k, R2 = 2.8k R2 Figure 1. Single-Ended Input (Terminating unused input) LVPECL OUTPUT INTERFACE APPLICATIONS VCC VCC R1 ZO = 50 ZO = 50 VCC -2V R2 VCC = 2.5V; R1 = 250, R2 = 62.5 VCC = 3.3V; R1 = 130, R2 = 82 VCC = 5V; R1 = 83, R2 = 125 R1 VCC VCC ZO = 50 ZO = 50 50 50 Rpd VCC R2 VCC = 2.5V; Rpd = 39 VCC = 3.3V; Rpd = 50 VCC = 5V; Rpd = 100 C (Optional) 0.01F Figure 2a. Parallel Thevenin-Equivalent Termination Figure 2b. Three Resistor "Y Termination" VCC VCC VCC R1 R1 ZO = 50 VCC -2V R3 VCC R2 R2 R4 VCC -1.3V VCC = 2.5V; R1 = 250, R2 = 62.5, R3 = 1k, R4 = 900, VCC = 3.3V; R1 = 130, R2 = 82, R3 = 1k, R4 = 1.6k, VCC = 5V; R1 = 83, R2 = 125, R3 = 1k, R4 = 2.8k, Figure 2c. Terminating Unused I/O M9999-092606 hbwhelp@micrel.com or (408) 955-1690 5 Micrel, Inc. Precision Edge(R) SY89311U 8 LEAD ULTRA-SMALL EPAD-MicroLeadFrame(R) (MLF-8) Package EP- Exposed Pad Die CompSide Island Heat Dissipation Heat Dissipation VEE Heavy Copper Plane VEE Heavy Copper Plane PCB Thermal Consideration for 8-Pin MLF(R) Package Package Notes: 1. Package meets Level 2 qualification. 2. All parts are dry-packaged before shipment. 3. Exposed pads must be soldered to a ground for proper thermal management. 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 The information furnished by Micrel in this datasheet is believed to be accurate and reliable. However, no responsibility is assumed by Micrel for its use. Micrel reserves the right to change circuitry and specifications at any time without notification to the customer. 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 at Purchaser's own risk and Purchaser agrees to fully indemnify Micrel for any damages resulting from such use or sale. (c) 2006 Micrel, Incorporated. M9999-092606 hbwhelp@micrel.com or (408) 955-1690 6 |
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