Precision Edge™ SY10ELT21L SY100ELT21L FINAL 3.3V DIFFERENTIAL LVPECL-to-LVTTL TRANSLATOR FEATURES ■ ■ ■ ■ ■ ■ ■ 3.3V power supply 2.0ns typical propagation delay Low power Differential LVPECL inputs 24mA TTL outputs Flow-through pinouts Available in 8-pin SOIC package Precision Edge™ DESCRIPTION The SY10/100ELT21L are single differential LVPECLto-LVTTL translators 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 ELT21L 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 /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 ELT21L 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 NC 1 8 VCC TTL D 2 7 Q PECL D 3 VBB 4 6 NC 5 GND PIN NAMES Pin Function Q TTL Output D, /D Differential LVPECL Inputs VCC +3.3V Supply VBB Reference Output GND Ground Precision Edge is a trademark of Micrel, Inc. Rev.: C 1 Amendment: /0 Issue Date: February 2003 Precision Edge™ SY10ELT21L SY100ELT21L Micrel ABSOLUTE MAXIMUM RATINGS(1) Symbol TRUTH TABLE Value Unit D /D Q –0.5 to +3.8 V L H L 0V to VCC+0.5 V H L H Open Open L Paramter VCC Power Supply Voltage VI PECL Input Voltage VO Voltage Applied to Output at HIGH State –0.5 to VCC V IO Current Applied to Output at LOW State Twice the Rated IOL mA Tstore Storage Temperature –65 to +150 °C TA Operating Temperature –40 to +85 °C 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 = +3.3V ±5% TA = –40°C Symbol TA = 0°C TA = +25°C TA = +85°C Parameter Min. Max. Min. Max. Min. Typ. Max. Min. Max. Unit Condition IOS Output Short Circuit Current –80 –275 –80 –275 –80 — –275 –80 –275 mA ICC Power Supply Current — 20 — 20 — 14 20 — 20 mA VOH Output HIGH Voltage 2.0 — 2.0 — 2.0 — — 2.0 — V IOH = –3.0mA VOL Output LOW Voltage — 0.5 — 0.5 — — 0.5 — 0.5 V IOL = 24mA VOUT = 0V PECL DC ELECTRICAL CHARACTERISTICS VCC = +3.3V ±5% TA = –40°C Symbol Parameter TA = 0°C TA = +25°C TA = +85°C Min. Max. Min. Max. Min. Typ. Max. Min. Max. Unit — 150 — 150 — — 150 — 150 µA IIH Input HIGH Current IIL Input LOW Current D /D 0.5 –300 — — 0.5 –300 — — 0.5 –300 — — — — 0.5 –300 — — µA VIH Input HIGH Voltage(2) 10ELT 100ELT 2070 2135 2410 2420 2130 2135 2460 2420 2170 2135 — — 2490 2420 2240 2135 2580 2420 mV VIL Input LOW Voltage(2) 10ELT 100ELT 1350 1490 1800 1825 1350 1490 1820 1825 1350 1490 — — 1820 1825 1350 1490 1855 1825 mV VBB Reference Output(2) 10ELT 100ELT 1870 1920 2000 2040 1920 1920 2030 2040 1950 1920 2000 1980 2050 2040 1990 1920 2110 2040 mV NOTES: 1. These values are for VCC = 3.3V. Level Specifications will vary 1:1 VCC. 2 Condition Precision Edge™ SY10ELT21L SY100ELT21L Micrel AC ELECTRICAL CHARACTERISTICS VCC = +3.3V ±5% TA = –40°C Symbol Parameter TA = 0°C TA = +25°C TA = +85°C Min. Max. Min. Max. Min. Typ. Max. Min. Max. Unit Condition tPLH tPHL Propagation Delay 1.5 2.5 1.5 2.5 1.5 2.0 2.5 1.5 2.5 ns CL = 20pF tskpp Part-to-Part Skew(1,2) — 0.5 — 0.5 — — 0.5 — 0.5 ns CL = 20pF CL = 20pF Frequency(2,3,4) fMAX Maximum Input 275 — 275 — 275 — — 275 — MHz VCMR Common Mode Range 1.2 VCC 1.2 VCC 1.2 — VCC 1.2 VCC V VPP Minimum Peak-to-Peak Input(5) 100 — 100 — 100 — — 100 — mV tr tf Output Rise/Fall Time (1.0V to 2.0V) 0.5 1.0 0.5 1.0 0.5 — 1.0 0.5 1.0 ns CL = 20pF 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 SY10ELT21LZC SY10ELT21LZCTR* SY100ELT21LZC SY100ELT21LZCTR* Package Type Operating Range Marking Code Z8-1 Commercial HEL21L Z8-1 Z8-1 Z8-1 Commercial Commercial Commercial Ordering Code Package Type Operating Range Marking Code SY10ELT21LZI(1) Z8-1 Industrial HEL21L HEL21L SY10ELT21LZITR*(1) Z8-1 Industrial HEL21L XEL21L SY100ELT21LZI(1) Z8-1 Industrial XEL21L XEL21L SY100ELT21LZITR*(1) Z8-1 Industrial XEL21L *Tape and Reel Note 1. Recommended for new designs. 3 Precision Edge™ SY10ELT21L SY100ELT21L Micrel 8 LEAD SOIC .150" WIDE (Z8-1) Rev. 03 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. 4