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| 3.3V DIFFERENTIAL LVPECL-to-LVTTL TRANSLATOR FEATURES s s s s s s s 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 D, pulldown and pullup on /D s Q output will default LOW with inputs open or at GND s VBB output s Available in 8-pin MSOP and SOIC package SY100EPT21L DESCRIPTION The SY100EPT21L is a single differential LVPECL-toLVTTL translator using a single +3.3V power supply. Because LVPECL (Low Voltage Positive ECL) levels are used, only +3.3V and ground are required. The small outline 8-lead SOIC package and low skew single gate design make the EPT21L 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 /D will be biased at a VCC/2 voltage level and the D input will be pulled to ground. This condition will force the Q output low to provide added stability. The 100EPT is compatible with positive ECL 100K logic levels. PIN CONFIGURATION/BLOCK DIAGRAM PIN NAMES Pin Function LVTTL Output Differential LVPECL Input Pair Positive Supply Output Reference Voltage Ground NC 1 D2 LVPECL LVTTL 8 VCC 7Q 6 NC 5 GND Q D, /D VCC VBB GND D3 VBB 4 (Available in 8-pin SOIC and 8-pin MSOP) Rev.: A Amendment: /1 1 Issue Date: July 2000 Micrel SY100EPT21L ABSOLUTE MAXIMUM RATINGS(1) Symbol VCC VI VO IO Tstore TA Paramter Power Supply Voltage PECL Input Voltage Voltage Applied to Output at HIGH State Current Applied to Output at LOW State Storage Temperature Operating Temperature Value -0.5 to +3.8 0V to VCC+0.5 -0.5 to VCC Twice the Rated IOL -65 to +150 -40 to +85 Unit V V V mA C C TRUTH TABLE D L H Open /D H L Open Q L H L 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. LVTTL DC ELECTRICAL CHARACTERISTICS VCC = +3.3V 5% TA = -40C Symbol IOS ICC VOH VOL Parameter Output Short Circuit Current Power Supply Current Output HIGH Voltage Output LOW Voltage Min. -80 -- 2.0 -- Max. -275 20 -- 0.5 TA = 0C Min. -80 -- 2.0 -- Max. -275 20 -- 0.5 TA = +25C Min. -80 -- 2.0 -- Typ. -- 14 -- -- Max. -275 20 -- 0.5 TA = +85C Min. -80 -- 2.0 -- Max. -275 20 -- 0.5 Unit mA mA V V IOH = -3.0mA IOL = 24mA Condition VOUT = 0V LVPECL DC ELECTRICAL CHARACTERISTICS VCC = +3.3V 5% TA = -40C Symbol IIH IIL VIH VIL VBB Parameter Input HIGH Current Input LOW Current D /D Min. -- 0.5 -300 2135 1490 1920 Max. 150 -- -- 2420 1825 2040 TA = 0C Min. -- 0.5 -300 2135 1490 1920 Max. 150 -- -- 2420 1825 2040 TA = +25C Min. -- 0.5 -300 2135 1490 1920 Typ. -- -- -- -- -- 1980 Max. 150 -- -- 2420 1825 2040 TA = +85C Min. -- 0.5 -300 2135 1490 1920 Max. 150 -- -- 2420 1825 2040 Unit A A Condition Input HIGH Voltage(2) 100EPT Input LOW Reference Voltage(2) Output(2) 100EPT 100EPT NOTES: 1. These values are for VCC = 3.3V. Level Specifications will vary 1:1 VCC. 2 Micrel SY100EPT21L AC ELECTRICAL CHARACTERISTICS VCC = +3.3V 5% TA = -40C Symbol tPLH tPHL tskpp fMAX VCMR VPP tr tf Parameter Propagation Delay Part-to-Part Skew(1,2) Maximum Input Frequency(3,4) Min. 1.5 -- 275 1.2 100 0.5 Max. 2.5 0.5 -- VCC -- 1.0 TA = 0C Min. 1.5 -- 275 1.2 100 0.5 Max. 2.5 0.5 -- VCC -- 1.0 TA = +25C Min. 1.5 -- 275 1.2 100 0.5 Typ. 1.9 -- -- -- -- -- Max. 2.5 0.5 -- VCC -- 1.0 TA = +85C Min. 1.5 -- 275 1.2 100 0.5 Max. 2.5 0.5 -- VCC -- 1.0 Unit ns ns MHz V mV ns CL = 20pF Condition CL = 20pF CL = 20pF CL = 20pF Common Mode Range Minimum Peak-to-Peak Input(5) Output Rise/Fall Time (1.0V to 2.0V) NOTES: 1. Part-to-Part Skew considering HIGH-to-HIGH transitions at common VCC level. 2. These parameters are guaranteed but not tested. 3. Frequency at which output levels will meet a 0.8V to 2.0V minimum swing. 4. The fMAX value is specified as the minimum guaranteed maximum frequency. Actual operational maximum frequency may be greater. 5. 100mV input guarantees full logic at output. PRODUCT ORDERING CODE Ordering Code SY100EPT21LZC SY100EPT21LZCTR SY100EPT21LKC SY100EPT21LKCTR Package Type Z8-1 Z8-1 K8-1 K8-1 Operating Range Commercial Commercial Commercial Commercial VCC Range (V) +3.3V 5% +3.3V 5% +3.3V 5% +3.3V 5% 3 Micrel SY100EPT21L 8 LEAD PLASTIC SOIC (Z8-1) Rev. 03 4 Micrel SY100EPT21L 8 LEAD MSOP (K8-1) Rev. 01 5 Micrel SY100EPT21L 6 Micrel SY100EPT21L 7 Micrel SY100EPT21L MICREL-SYNERGY TEL 3250 SCOTT BOULEVARD SANTA CLARA CA 95054 USA FAX + 1 (408) 980-9191 + 1 (408) 914-7878 WEB http://www.micrel.com This information is believed to be accurate and reliable, however no responsibility is assumed by Micrel for its use nor for any infringement of patents or other rights of third parties resulting from its use. No license is granted by implication or otherwise under any patent or patent right of Micrel Inc. (c) 2000 Micrel Incorporated 8 |
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