3V LVTTL-TO-DIFFERENTIAL LVPECL AND DIFFERENTIAL LVPECL-TO-LVTTL TRANSLATOR Micrel, Inc. Precision Edge® SY89328L ® Precision Edge SY89328L FEATURES ■ 3.3V ±10% power supply ■ Guaranteed AC parameters over temperature: fMAX > 275MHz (LVTTL) ■ < 2ns LVPECL-to-LVTTL propagation delay ■ < 600ps LVTTL-to-LVPECL propagation delay ■ Internal 75kΩ input pull-up and pull-down resistors ■ Industrial temperature range: –40°C to +85°C ■ Available in ultra-small 8-pin MLF™ (2mm × 2mm) package Precision Edge® DESCRIPTION The SY89328L is a differential LVPECL-to-LVTTL translator and an LVTTL-to-differential LVPECL translator in a single package. Because LVPECL (Positive ECL) levels are used, only +3.3V and ground are required. The SY89328L is functionally equivalent to the SY100EPT28L, but in an ultra-small 8-lead MLF™ package that features a 70% smaller footprint. This ultra-small package and the dual translation design of the SY89328L make it ideal for applications that are sending and receiving signals across a backplane. BLOCK DIAGRAM IN_LVPECL Q_LVTTL /IN_LVPECL Q_LVPECL IN_LVTTL /Q_LVPECL Precision Edge is a registered trademark of Micrel, Inc. MicroLeadFrame and MLF are trademarks of Amkor Technology, Inc. M9999-072005 [email protected] or (408) 955-1690 Rev.: B 1 Amendment: /0 Issue Date: July 2005 Precision Edge® SY89328L Micrel, Inc. PACKAGE/ORDERING INFORMATION Ordering Information IN_LVPECL 1 8 VCC /IN_LVPECL 2 7 Q_LVTTL Part Number Q_LVPECL 3 6 IN_LVTTL GND /Q_LVPECL 4 5 Package Type Operating Range Package Marking Lead Finish SY89328LMITR MLF-8 Industrial HEP28 Sn-Pb SY89328LMGTR MLF-8 Industrial HEP28 with Pb-Free bar-line indicator Pb-Free NiPdAu 8-Pin MLF™ Ultra-Small Outline (2mm × 2mm) PIN DESCRIPTION Pin Number Pin Name Type 1, 2 IN_LVPECL, /IN_LVPECL 100k ECL Input Differential LVPECL Input: Includes internal 75kΩ pull-down resistor on internal 75kΩ pull-up and pull-down resistors on /IN. See “Input Interface Applications” section for single-ended inputs. 7 Q_LVTTL LVTTL Output Single-ended LVTTL Output: Translated from LVPECL input. Q_LVTTL output will default LOW with IN_LVPECL and /IN_LVPECL inputs left open. 6 IN_LVTTL LVTTL Input 3, 4 Q_LVPECL, /Q_LVPECL 100k ECL Output Differential LVPECL Output: Translated from LVTTL input. See “Output Interface Applications” section for recommendations on terminations. 8 VCC VCC Power Positive Power Supply: Bypass with 0.1µF//0.01µF low ESR capacitors. 5 GND, Exposed Pad Ground ` M9999-072005 [email protected] or (408) 955-1690 Pin Function Single-ended LVTTL Input. GND and exposed pad must be tied to ground plane. 2 Precision Edge® SY89328L Micrel, Inc. Absolute Maximum Ratings(Note 1) Operating Ratings(Note 2) Supply Voltage (VCC) .................................. –0.5V to +3.8V 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.) ................... +260°C Storage Temperature (TS) ....................... –65°C to +150°C Supply Voltage (VCC) ...................................... 3.0V to 3.6V 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™ (ΨJB) Junction-to-Board ................................................ 60°C/W Note 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. Note 2. The data sheet limits are not guaranteed if the device is operated beyond the operating ratings. Note 3. Package thermal resistance assumes exposed pad is soldered (or equivalent) to the devices most negative potential on the PCB. DC ELECTRICAL CHARACTERISTICS(Note 4) Symbol Parameter VCC Power Supply Voltage ICC Power Supply Current Condition Min Typ Max Units 3.0 3.3 3.6 V 22 40 mA Max VCC, No Load LVPECL DC ELECTRICAL CHARACTERISTICS(Note 4) VCC = +3.3V±10% and VEE = 0V; RL = 50Ω to VCC–2V; TA = –40°C to +85°C, unless otherwise noted. Symbol Parameter VOH Output HIGH Voltage VCC–1.145 VCC–1.020 VCC–0.895 V VOL Output LOW Voltage VCC–1.945 VCC–1.820 VCC–1.695 V VIH Input HIGH Voltage VCC–1.225 VCC–0.880 V VIL Input LOW Voltage VCC–1.945 VCC–1.625 V VCMR LVPECL Common Mode Range 1.2 VCC V IIH Input HIGH Current 150 µA IIL Input LOW Current Note 4. Condition Min VIN = 3.46V Typ Max IN 0.5 µA /IN –300 µA The circuit is designed to meet the DC specifications shown in the above table after thermal equilibrium has been established. M9999-072005 [email protected] or (408) 955-1690 Units 3 Precision Edge® SY89328L Micrel, Inc. LVTTL DC ELECTRICAL CHARACTERISTICS(Note 5) VCC = +3.3V±10%; CL = 20pF, TA = –40°C to +85°C, unless otherwise noted. Symbol Parameter Condition Min Typ Max Units VOH Output HIGH Voltage IOH = –3mA 2.0 — — V VOL Output LOW Voltage IOH = –24mA — — 0.5 V VIH Input HIGH Voltage 2.0 — — V VIL Input LOW Voltage — — 0.8 V VIK Input Clamp Voltage IIK = –18mA — — –1.2 V IIH Input HIGH Current VIN = 2.7V — — 20 µA VIN = VCC — — 100 µA IIL Input LOW Current VIN = 0.5V — — –0.2 µA IOUT(SC) LVTTL Output Short-Circuit Current VOUT = 0V –275 — –80 mA Condition Min Typ Max Units LVPECL Note 6 700 — — MHz LVTTL Note 7 275 350 — MHz Propagation Delay IN_LVPECL-to-Q_LVTTL Note 7 1.5 — 2.5 ns IN_LVTTL-to-Q_LVPECL Note 6 100 400 600 ps Note 8 100 — — mV 45 50 55 % AC ELECTRICAL CHARACTERISTICS VCC = +3.3V±10%. TA = –40°C to +85°C, unless otherwise noted. Symbol Parameter fMAX Maximum Frequency tpd VPP LVPECL Input Voltage Swing (Single-Ended) tDC Duty Cycle tJitter Cycle-toCycle Jitter Note 9 <1 psRMS Total Jitter Note 10 20 psPP LVPECL Output Rise/Fall Times (20% to 80%) At full output swing, Note 5 200 — 500 ns LVTTL Output Rise/Fall Times (10% to 90%) At full output swing, Note 6 0.5 — 1.0 ns tr, tf Note 5. The circuit is designed to meet the DC specifications shown in the above table after thermal equilibrium has been established. Note 6. RL = 50Ω to VCC –2V Note 7. CL = 20pF Note 8. VPP (min) is the minimum input swing for which AC parameters are guaranteed. Note 9. 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. M9999-072005 [email protected] or (408) 955-1690 4 Precision Edge® SY89328L Micrel, Inc. LVPECL INPUT INTERFACE APPLICATIONS +3.3V 1kΩ +3.3V IN VCC —1.3V 1.6kΩ Figure 1. Single-Ended Input (Terminating unused input) LVPECL OUTPUT INTERFACE APPLICATIONS +3.3V +3.3V 130Ω 130Ω +3.3V +3.3V ZO = 50Ω +3.3V ZO = 50Ω ZO = 50Ω ZO = 50Ω 50Ω VCC —2V82Ω 50Ω 82Ω VCC —2V Figure 2a. Parallel Thevenin-Equivalent Termination Figure 2b. Three Resistor “Y Termination” +3.3V +3.3V +3.3V 130Ω 1kΩ 130Ω +3.3V ZO = 50Ω 82Ω VCC —2V 82Ω 1.6kΩ VCC —1.3V Figure 2c. Terminating Unused I/O M9999-072005 [email protected] or (408) 955-1690 50Ω 5 C (Optional) 0.01µF Precision Edge® SY89328L Micrel, Inc. 8 LEAD ULTRA-SMALL EPAD-MicroLeadFrame™ (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™ 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 + 1 (408) 944-0800 FAX + 1 (408) 474-1000 WEB USA 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. © 2005 Micrel, Incorporated. M9999-072005 [email protected] or (408) 955-1690 6