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| DIFFERENTIAL PECL-to-TTL TRANSLATOR FEATURES s s s s s s 2.5ns typical propagation delay Low power Differential PECL inputs 24mA TTL outputs Flow-through pinouts Available in 8-pin SOIC package ClockWorksTM SY10ELT21 SY100ELT21 DESCRIPTION The SY10/100ELT21 are single differential PECL-toTTL translators. Because PECL (Positive ECL) levels are used, only +5V and ground are required. The small outline 8-lead SOIC package and low skew single gate design make the ELT21 ideal for applications that require the translation of a clock or data signal where minimal space, low power, and low cost are critical. The VBB output allow differential single-ended, or ACcoupled interface to the device. If used, the VBB output should be bypassed to VCC with a 0.01F capacitor. The ELT21 is available in both ECL standards: the 10ELT is compatible with positive ECL 10H logic levels, while the 100ELT is compatible with positive ECL 100K logic levels. PIN CONFIGURATION/BLOCK DIAGRAM PIN NAMES Pin Q TTL Output Differential PECL Inputs +5.0V Supply Reference Output Ground Function NC 1 D2 PECL TTL 8 VCC 7Q 6 NC 5 GND D, /D VCC VBB GND D3 VBB 4 SOIC TOP VIEW Rev.: B Amendment: /0 1 Issue Date: April 2000 Micrel ClockWorksTM SY10ELT21 SY100ELT21 ABSOLUTE MAXIMUM RATINGS(1) Symbol VCC VI VO IO Tstore TA Parameter 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 +7.0 0V to VCC+0.5 -0.5 to +5.5 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. TTL DC ELECTRICAL CHARACTERISTICS VCC = 4.75V to 5.25V TA = -40C Symbol IOS ICC VOH VOL Parameter Output Short Circuit Current Power Supply Current Output HIGH Voltage Output LOW Voltage Min. -80 -- 2.5 2.0 -- Max. -200 20 -- -- 0.5 TA = 0C Min. -80 -- 2.5 2.0 -- Max. -200 20 -- -- 0.5 TA = +25C Min. -80 -- 2.5 2.0 -- Typ. -- 14 -- -- -- Max. -200 20 -- -- 0.5 TA = +85C Min. -80 -- 2.5 2.0 -- Max. -200 20 -- -- 0.5 Unit mA mA V V V Condition VOUT = 0V -- IOH = -3.0mA IOH = -15mA IOL = 24mA PECL DC ELECTRICAL CHARACTERISTICS VCC = 4.75V to 5.25V TA = -40C Symbol IIH IIL VIH VIL VBB Parameter Input HIGH Current Input LOW Current Input HIGH Voltage(2) 10ELT 100ELT Min. -- 0.5 3770 3835 3050 3190 3570 3620 Max. 150 -- 4110 4120 3500 3525 3700 3740 TA = 0C Min. -- 0.5 3830 3835 3050 3190 3620 3620 Max. 150 -- 4160 4120 3520 3525 3730 3740 TA = +25C Min. -- 0.5 3870 3835 3050 3190 3650 3620 Typ. -- -- -- -- -- -- -- Max. 150 -- 4190 4120 3520 3525 3750 3740 TA = +85C Min. -- 0.5 3940 3835 3050 3190 3690 3620 Max. 150 -- 4280 4120 3555 3525 3810 3740 Unit A A mV mV mV Condition Input LOW Voltage(2) 10ELT 100ELT Reference Output(2) 10ELT 100ELT NOTES: 1. These values are for VCC = 5.0V. Level Specifications will vary 1:1 VCC. 2 Micrel ClockWorksTM SY10ELT21 SY100ELT21 AC ELECTRICAL CHARACTERISTICS VCC = 4.75V to 5.25V TA = -40C Symbol tPLH tPHL tskpp fMAX VCMR VPP tr tf Parameter Propagation Delay D to Output Q Part-to-Part Skew(1, 2) Maximum Input Frequency (2, 3, 4) TA = 0C Min. 2.0 -- 160 2.4 200 -- Max. 3.0 0.5 -- VCC -- 1.5 TA = +25C Min. 2.0 -- 160 2.4 200 -- Typ. -- -- -- -- -- -- Max. 3.0 0.5 -- VCC -- 1.5 TA = +85C Min. 2.0 -- 160 2.4 200 -- Max. 3.0 0.5 -- VCC -- 1.5 Unit ns ns MHz V mV ns CL = 50pF Condition CL = 50pF CL = 50pF CL = 50pF Min. 2.0 -- 160 2.4 Input(5) 200 -- Max. 3.0 0.5 -- VCC -- 1.5 Common Mode Range Minimum Peak-to-Peak Output Rise/Fall Time (1.0V to 2.0V) NOTES: 1. Part-to-Part Skew considering HIGH-to-HIGH transitions at common VCC levels. 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. 200mV input guarantees full logic at output. PRODUCT ORDERING CODE Ordering Code SY10ELT21ZC SY10ELT21ZCTR SY100ELT21ZC SY100ELT21ZCTR Package Type Z8-1 Z8-1 Z8-1 Z8-1 Operating Range Commercial Commercial Commercial Commercial VCC Range (V) +4.75 to +5.25 +4.75 to +5.25 +4.75 to +5.25 +4.75 to +5.25 3 Micrel ClockWorksTM SY10ELT21 SY100ELT21 8 LEAD SOIC .150" WIDE (Z8-1) Rev. 03 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 4 |
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