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| Micrel, Inc. 3.3V DIFFERENTIAL LVPECL-to-LVTTL TRANSLATOR Precision Edge(R) SY89321L Precision Edge(R) SY89321L FEATURES 3.3V power supply 1.9ns typical propagation delay 275MHz fMAX Differential LVPECL inputs 24mA LVTTL outputs Flow-through pinouts Internal input resistors: pulldown on IN, pulldown and pullup on /IN s Q output will default LOW with inputs open s VBB output s Available in ultra-small 8-pin MLF(R) (2mm x 2mm) package s s s s s s s Precision Edge(R) DESCRIPTION The SY89321L is a differential LVPECL-to-LVTTL translator requiring only a single +3.3V power. Because LVPECL (Low Voltage Positive ECL) levels are used, only +3.3V and ground are required. The SY89321L is functionally equivalent to the SY100EPT21L, but in an ultra-small 8-lead MLF(R) package that features a 70% smaller footprint. This ultra-small package and low skew single gate design make the SY89321L ideal for applications that require the translation of a clock or data signal where minimal space, low power and low cost are critical. VBB allows a differential, single-ended, or AC-coupled interface to the device. If used, the VBB output should be bypassed to VCC with 0.01F capacitor. Under open input conditions, the /IN will be biased at a VCC/2 voltage level and the IN input will be pulled to ground. This condition will force the Q output low to provide added stability. The SY89321L is compatible with positive ECL 100k logic levels. BLOCK DIAGRAM LVPECL IN Q /IN LVTTL Precision Edge is a registered trademark of Micrel, Inc. MicroLeadFrame and MLF are registered trademarks of Amkor Technology, Inc. M9999-051006 hbwhelp@micrel.com or (408) 955-1690 Rev.: C Amendment: /0 1 Issue Date: May 2006 Micrel, Inc. Precision Edge(R) SY89321L PACKAGE/ORDERING INFORMATION Ordering Information NC IN /IN VBB 1 2 8 VCC Q NC GND Note: LVTTL 7 6 5 Part Number SY89321LMITR SY89321LMGTR(1) Package Type MLF-8 MLF-8 Operating Range Industrial Industrial Package Marking 321 321 with Pb-Free bar-line indicator Lead Finish Sn-Pb Pb-Free NiPdAu LVPECL 3 4 8-Pin MLF(R) Ultra-Small Outline (2mm x 2mm) 1. Pb-Free package is recommended for new designs. PIN DESCRIPTION Pin Number 1,6 2 Pin Name NC IN 100K LVPECL Input 100K LVPECL Input Reference Voltage Output Ground LVTTL Output Positive Power Supply Type Pin Function No connection. Differential PECL Input: Internal 75k pull-down resistor. If left open, pin defaults LOW. Q output will be LOW. See "Input Interface Applications" section for single-ended inputs. Differential PECL 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. Bias Reference Voltage: VCC-1.3V. Used as reference voltage for singleended inputs or AC-coupling to the IN, /IN inputs. Limit sink / source 0.5mA. GND and Exposed pad must be tied to ground plane. Single-ended LVTTL Output: Defaults to LOW if IN inputs left open. Positive Power Supply: Bypass with 0.1F//0.01F low ESR capacitors. 3 /IN 4 5 7 8 VBB GND, Exposed Pad Q VCC M9999-051006 hbwhelp@micrel.com or (408) 955-1690 2 Micrel, Inc. Precision Edge(R) SY89321L Absolute Maximum Ratings(Note 1) Supply Voltage (VCC) .................................. -0.5V to +3.8V Input Voltage (VIN) ......................................... -0.5V to VCC LVTT Output Current (IOUT) Continuous ............................................................. 50mA Surge .................................................................... 100mA Current (VBB) Source or sink current on VBB, Note 3 ................ 1.5mA Lead Temperature (soldering, 20 sec.) ................... +260C Storage Temperature (TS) ....................... -65C to +150C Operating Ratings(Note 2) Supply Voltage (VCC) ...................................... 3.0V to 3.6V Ambient Temperature (TA) ......................... -40C to +85C Package Thermal Resistance, Note 4 MLF(R) (JA) Still-Air ................................................................. 93C/W 500lfpm ............................................................... 87C/W MLF(R) (JB) Junction-to-Board ................................................ 60C/W LVTTL DC ELECTRICAL CHARACTERISTICS VCC = +3.3V 10% Symbol IOS ICC VOH VOL Parameter Output Short Circuit Current Power Supply Current Output HIGH Voltage Output LOW Voltage IOH = -3.0mA IOL = 24mA Condition VOUT = 0V, Note 5 Min -80 -- 2.0 -- Typ -- 14 -- -- Max -275 20 -- 0.5 Units mA mA V V LVPECL DC ELECTRICAL CHARACTERISTICS VCC = +3.3V 10%; TA = -40C to +85C unless otherwise noted. Symbol VIH VIL VBB IIH IIL Note 1. Parameter Input HIGH Voltage Input LOW Voltage Bias Voltage Input HIGH Current Input LOW Current IN Input LOW Current /IN Condition Min VCC-1.165 VCC-1.810 -- 0.5 -300 Typ -- -- Max VCC-0.880 VCC-1.475 150 -- -- Units V V V A A A VCC-1.38 VCC-1.32 VCC-1.26 -- -- -- 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. The data sheet limits are not guaranteed if the device is operated beyond the operating ratings. Due to the limited drive capability use for input of the same package only. Package thermal resistance assumes exposed pad is soldered (or equivalent) to the devices most negative potential (GND) on the PCB. Max. limit only applicable for short durations, not for continuous operation! Note 2. Note 3. Note 4. Note 5. M9999-051006 hbwhelp@micrel.com or (408) 955-1690 3 Micrel, Inc. Precision Edge(R) SY89321L AC ELECTRICAL CHARACTERISTICS VCC = +3.3V 10%; CL = 20pF, TA = -40C to +85C unless otherwise noted. Symbol fMAX tpd tskpp VCMR VPP tr tf tJITTER Parameter Maximum Input Frequency Propagation Delay Part-to-Part Skew Common Mode Range Minimum Peak-to-Peak Input Output Rise/Fall Time (1.0V to 2.0V) Cycle-to-cycle (rms) Total jitter (pk-pk) Note 6. Note 7. Note 8. Note 9. Condition Note 6 VIN 100mV, Note 7 Note 8 Min 275 1.5 -- 1.2 100 0.5 Typ -- 1.9 -- -- -- -- Max -- 2.5 0.5 VCC -- 1.0 2 15 Units MHz ns ns V mV ns psRMS psPP Note 9 Note 10 The fMAX value is specified as the minimum guaranteed maximum frequency (While maintaining TTL swing of 0.8V to 2.0V). Actual operational maximum frequency may be greater. Part-to-Part Skew considering HIGH-to-HIGH transitions at common VCC level. VPP(min) is the minimum input swing for which AC parameters are guaranteed. Cycle-to-cycle jitter definition: The variation of periods between adjacent cycles, Tn - Tn-1,where T is the time between rising edges of the output signal. Note 10. Total jitter definition: with an ideal clock input of frequency fMAX, no more than one output edge in 1012 output edge will deviate by more than the specified peak-to-peak jitter value. INPUT INTERFACE APPLICATIONS SY89321L IN VCC /IN 0.01F VBB Single-Ended Input (Terminating unused input) M9999-051006 hbwhelp@micrel.com or (408) 955-1690 4 Micrel, Inc. Precision Edge(R) SY89321L 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: Note 1. Package meets Level 2 qualification. Note 2. All parts are dry-packaged before shipment. Note 3. Exposed pads must be soldered to a ground for proper thermal management. MICREL, INC. 2180 FORTUNE DRIVE SAN JOSE, CA 95131 TEL USA + 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. M9999-051006 hbwhelp@micrel.com or (408) 955-1690 5 |
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