3.3V DIFFERENTIAL LVPECL-to-LVTTL TRANSLATOR Micrel Precision Edge™ SY89321L Precision Edge™ SY89321L FEATURES ■ ■ ■ ■ ■ ■ ■ 3.3V power supply 1.9ns typical propagation delay 275MHz fMAX (clock bit stream, not pseudo-random) Differential LVPECL inputs 24mA LVTTL outputs Flow-through pinouts Internal input resistors: pulldown on IN, pulldown and pullup on /IN ■ Q output will default LOW with inputs open ■ VBB output ■ Available in ultra-small 8-pin MLF™ (2mm x 2mm) package Precision Edge™ 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™ 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 0.01µF 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 trademark of Micrel, Inc. MicroLeadFrame and MLF are trademarks of Amkor Technology, Inc. Rev.: A 1 Amendment: /0 Issue Date: August 2003 Precision Edge™ SY89321L Micrel PACKAGE/ORDERING INFORMATION Ordering Information NC 1 IN 2 VCC Part Number 7 Q SY89321LMITR(1) 8 LVTTL Package Type Operating Range Package Marking MLF-8 Industrial 321 LVPECL /IN 3 6 NC VBB 4 5 GND Note 1. Tape and Reel. 8-Pin MLF™ Ultra-Small Outline (2mm x 2mm) PIN DESCRIPTION Pin Number Pin Name 1,6 NC Type Pin Function 2 IN 100K LVPECL Input Differential PECL Input: Internal 75kΩ pull-down resistor. If left open, pin defaults LOW. Q output will be LOW. See “Input Interface Applications” section for single-ended inputs. 3 /IN 100K LVPECL Input Differential PECL 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. 4 VBB Reference Voltage Output 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. 5 GND, Exposed Pad Ground 7 Q LVTTL Output Single-ended LVTTL Output: Defaults to LOW if IN inputs left open. 8 VCC Positive Power Supply Positive Power Supply: Bypass with 0.1µF//0.01µF low ESR capacitors. No connection. GND and Exposed pad must be tied to ground plane. 2 Precision Edge™ SY89321L Micrel Absolute Maximum Ratings(Note 1) Operating Ratings(Note 2) 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, 10 sec.) ................... +220°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 4 MLF™ (θJA) Still-Air ................................................................. 93°C/W 500lfpm ............................................................... 87°C/W MLF™ (ΨJB) Junction-to-Board ................................................ 60°C/W LVTTL DC ELECTRICAL CHARACTERISTICS VCC = +3.3V ±10% Symbol Parameter Condition Min Typ Max Units IOS Output Short Circuit Current VOUT = 0V, Note 5 –80 — –275 mA ICC Power Supply Current — 14 20 mA VOH Output HIGH Voltage IOH = –3.0mA 2.0 — — V VOL Output LOW Voltage IOL = 24mA — — 0.5 V LVPECL DC ELECTRICAL CHARACTERISTICS VCC = +3.3V ±10%; TA = –40°C to +85°C unless otherwise noted. Symbol Parameter VIH Condition Min Typ Max Units Input HIGH Voltage VCC–1.165 — VCC–0.880 V VIL Input LOW Voltage VCC–1.810 — VCC–1.475 V VBB Bias Voltage VCC–1.38 VCC–1.32 VCC–1.26 V IIH Input HIGH Current — — 150 µA IIL Input LOW Current IN 0.5 — — µA Input LOW Current /IN –300 — — µA 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. Due to the limited drive capability use for input of the same package only. Note 4. Package thermal resistance assumes exposed pad is soldered (or equivalent) to the devices most negative potential (GND) on the PCB. Note 5. Max. limit only applicable for short durations, not for continuous operation! 3 Precision Edge™ SY89321L Micrel AC ELECTRICAL CHARACTERISTICS VCC = +3.3V ±10%; CL = 20pF, TA = –40°C to +85°C unless otherwise noted. Symbol Parameter Condition Min Typ Max Units fMAX Maximum Input Frequency Note 6 275 — — MHz tpd Propagation Delay 1.5 1.9 2.5 ns tskpp Part-to-Part Skew — — 0.5 ns VCMR Common Mode Range 1.2 — VCC V VPP Minimum Peak-to-Peak Input 100 — — mV tr tf Output Rise/Fall Time (1.0V to 2.0V) 0.5 — 1.0 ns tJITTER Cycle-to-cycle (rms) Note 9 2 psrms Total jitter (pk-pk) Note 10 15 pspk-pk Note 6. VIN ≥ 100mV, Note 7 Note 8 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. Note 7. Part-to-Part Skew considering HIGH-to-HIGH transitions at common VCC level. 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. INPUT INTERFACE APPLICATIONS SY89321L IN VCC /IN 0.01µF VBB Single-Ended Input (Terminating unused input) 4 Precision Edge™ SY89321L Micrel 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. TEL 1849 FORTUNE DRIVE SAN JOSE, CA 95131 + 1 (408) 944-0800 FAX + 1 (408) 944-0970 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. © 2003 Micrel, Incorporated. 5