SY100EPT21L 3.3V Differential ECL LVPECL-to-LVTTL Translator ECL Pro General Description The SY100EPT21L is a single, differential LVPECL-to- LVTTL translator using a single +3.3V power supply. Because the device uses low-voltage positive ECL ECL Pro (LVPECL) levels, only +3.3V and ground are required. The Features small-outline 8-pin SOIC package and low-skew, single- gate design make the EPT21L ideal for applications that Guaranteed over the industrial temperature range: require the translation of a clock or data signal where 40C to +85C minimal space, low power, and low cost are critical. Pin-for-pin, plug-in replacement to MC100EPT21D/DT VBB allows a differential, single-ended, or AC-coupled 3.3V power supply output should be interface to the device. If used, the VBB 1.9ns typical propagation delay bypassed to VCC with 0.01F capacitor. 275MHz fMAX (clock) Under open input conditions, the /D is biased at a VCC/2 Differential LVPECL inputs voltage level and the D input is pulled to ground. This condition forces the Q output low to provide added 24mA LVTTL output stability. Flow-through pin configuration The 100EPT is compatible with positive ECL 100K logic Q output defaults LOW with inputs open levels. For applications that require the smallest footprint, VBB output consider the SY89321L in ultra-small 8-pin MSOP and Available in 8-pin MSOP and SOIC packages SOIC packages. Data sheets and support documentation can be found on Micrels web site at: www.micrel.com. Applications ASIC/FPGA interface Legacy interface Precision differential-to-general purpose, single-ended translation Cross Reference Micrel ON Semiconductor SY100EPT21LZI MC100EPT21D SY100EPT21LZITR MC100EPT21DR2 SY100EPT21LKI MC100EPT21DT SY100EPT21LKITR MC100EPT21DTR2 ECL Pro is a trademark of Micrel, Inc Micrel Inc. 2180 Fortune Drive San Jose, CA 95131 USA tel +1 (408) 944-0800 fax + 1 (408) 474-1000 Micrel, Inc. SY100EPT21L (1) Ordering Information Part Number Package Operating Range Marking (2) SY100EPT21LZG 8-Pin SOIC (Z8-1) Industrial XEP21L with Pb-Free bar-line indicator (2, 3) SY100EPT21LZGTR 8-Pin SOIC (Z8-1) Industrial XEP21L with Pb-Free bar-line indicator (2) SY100EPT21LKG 8-Pin MSOP (K8-1) Industrial XP21 with Pb-Free bar-line indicator (2, 3) SY100EPT21LKGTR 8-Pin MSOP (K8-1) Industrial XP21 with Pb-Free bar-line indicator Notes: 1. Contact factory for die availability. Dice are guaranteed at T = 25C, DC Electricals only. A 2. Pb-Free packages are recommended for new designs. 3. Tape and Reel. Pin Configuration 8-Pin SOIC (Z8-1) 8-Pin MSOP (K8-1) Pin Description Pin Number Pin Name Pin Function 1 NC No Connect 2, 3 D, /D Differential LVPECL Input Pair 4 VBB Output Reference Voltage 5 GND Ground 6 NC No Connect 7 Q LVTTL Output 8 VCC Positive Supply Truth Table D /D Q L H L H L H Open Open L M9999-112712-F November 20012 2 hbwhelp micrel.com or (408) 955-1690