Precision Edge 3.3V DIFFERENTIAL SY89321L Micrel, Inc. Precision Edge LVPECL/CML/LVDS-to-LVTTL SY89321L TRANSLATOR FEATURES 3.3V power supply Precision Edge 1.9ns typical propagation delay 275MHz f MAX DESCRIPTION Differential LVPECL/CML/LVDS inputs 24mA LVTTL outputs The SY89321L is a differential LVPECL/CML/LVDS- Flow-through pinouts to-LVTTL translator requiring only a single +3.3V power. Internal input resistors: pulldown on IN, pulldown The SY89321L is functionally equivalent to the and pullup on /IN SY100EPT21L, but in an ultra-small 8-pin MLF package that features a 70% smaller footprint. This ultra-small Q output will default LOW with inputs open package and low skew single gate design make the V output BB SY89321L ideal for applications that require the translation Available in ultra-small 8-pin MLF (2mm x 2mm) of a clock or data signal where minimal space, low power package and low cost are critical. V allows a differential, single-ended, or AC-coupled BB interface to the device. If used, the V output should be BB bypassed to V with 0.01 F capacitor. CC Under open input conditions, the /IN will be biased at a V /2 voltage level and the IN input will be pulled to BLOCK DIAGRAM CC ground. This condition will force the Q output low to provide added stability. The SY89321L is compatible with positive ECL 100k logic levels. IN LVPECL/ Q LVTTL CML/LVDS /IN Precision Edge is a registered trademark of Micrel, Inc. MicroLeadFrame and MLF are registered trademarks of Amkor Technology, Inc. Rev.: D Amendment: /0 M9999-060208 1 Issue Date: June 2008 hbwhelp micrel.com or (408) 955-1690 Precision Edge SY89321L Micrel, Inc. PACKAGE/ORDERING INFORMATION Ordering Information NC 1 8 VCC Package Operating Package Lead LVTTL Part Number Type Range Marking Finish IN 2 Q 7 SY89321LMITR MLF-8 Industrial 321 Sn-Pb /IN 3 6 NC (1) LVPECL/CML/LVDS SY89321LMGTR MLF-8 Industrial 321 with Pb-Free VBB 4 5 GND Pb-Free bar-line indicator NiPdAu Note: 8-Pin MLF 1. Pb-Free package is recommended for new designs. Ultra-Small Outline (2mm x 2mm) PIN DESCRIPTION Pin Number Pin Name Type Pin Function 1,6 NC No connection. 2 IN 100K LVPECL/ Differential PECL/CML/LVDS Input: Internal 75k pull-down resistor. If left CML/LVDS open, piN defaults LOW. Q output will be LOW. See Input Interface Input Applications section for CML, LVDS and single-ended inputs. 3 /IN 100K LVPECL/ Differential PECL/CML/LVDS Input: Internal 75k pull-up and pull-down CML/LVDS resistors. If left floating, pin defaults to V /2. When not used, this input can CC Input be left open. See Input Interface Applications section for CML, LVDS and single-ended inputs. 4 VBB Reference Bias Reference Voltage: V 1.3V. Used as reference voltage for single- CC Voltage Output ended inputs or AC-coupling to the IN, /IN inputs. Limit sink / source 0.5mA. 5 GND, Ground GND and Exposed pad must be tied to ground plane. Exposed Pad 7 Q LVTTL Output Single-ended LVTTL Output: Defaults to LOW if IN inputs left open. 8 VCC Positive Positive Power Supply: Bypass with 0.1 F//0.01 F low ESR capacitors. Power Supply M9999-060208 2 hbwhelp micrel.com or (408) 955-1690