5V/3.3V TTL-to-DIFFERENTIAL PECL TRANSLATOR FEATURES ■ ■ ■ ■ ■ ■ ■ ClockWorks™ SY10ELT20V SY100ELT20V DESCRIPTION 3.3V and 5V power supply options 300ps typical propagation delay Low power Differential PECL output PNP TTL input for minimal loading Flow-through pinouts Available in 8-pin SOIC package The SY10/100ELT20V is a single TTL-to-differential PECL translators. Because PECL (Positive ECL) levels are used, either +5V or +3.3V and ground are required. The small outline 8-lead SOIC package and low skew single gate design make the ELT20V ideal for applications that require the translation of a clock or data signal where minimal space, low power, and low cost are critical. The ELT20V 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 NC 1 8 VCC TTL Q 2 Q Differential PECL Output 7 D D TTL Input 6 NC VCC +5V/+3.3V Supply 5 GND GND Ground PECL Q 3 NC 4 Function SOIC TOP VIEW Rev.: A 1 Amendment: /0 Issue Date: December 1999 ClockWorks™ SY10ELT20V SY100ELT20V Micrel ABSOLUTE MAXIMUM RATINGS(1) Symbol Paramter TRUTH TABLE Value Unit D Q Q VCC Power Supply Voltage –0.5 to +7.0 V H H L VI TTL Input Voltage –0.5 to VCC V L L H II TTL Input Current –30 to +5.0 mA Open H L IOUT PECL Output Current –Continuous –Surge mA 50 100 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. DC ELECTRICAL CHARACTERISTICS VCC = +3.3V ±10% or +5.0V ±10% TA = –40°C Symbol ICC Parameter Power Supply Current TA = 0°C TA = +25°C TA = +85°C Min. Max. Min. Max. Min. Typ. Max. Min. Max. Unit Condition — 20 — 20 — — 20 — 20 mA — TTL DC ELECTRICAL CHARACTERISTICS VCC = +3.3V ±10% or +5.0V ±10% TA = –40°C Symbol Parameter TA = 0°C TA = +25°C Min. Max. Min. Max. Min. Typ. TA = +85°C Max. Min. Max. Unit Condition VIH Input HIGH Voltage 2.0 — 2.0 — 2.0 — 2.0 — V — VIL Input LOW Voltage — 0.8 — 0.8 — 0.8 — 0.8 V — IIH Input HIGH Current — — 20 100 — — 20 100 — — 20 100 — — 20 100 µA VIN = 2.7V VIN = VCC IIL Input LOW Current — –0.2 — –0.2 — –0.2 — –0.2 mA VIN = 0.5V VIK Input Clamp Voltage — –1.2 — –1.2 — –1.2 — –1.2 V IIN = –18mA Unit Condition PECL DC ELECTRICAL CHARACTERISTICS VCC = +3.3V ±10% or +5.0V ±10% TA = –40°C Symbol VOH VOL Parameter Output HIGH TA = 0°C TA = +25°C TA = +85°C Min. Max. Min. Max. Min. Typ. Max. Min. Max. 10ELT 3920 100ELT 3915 4110 4120 3980 3975 4160 4120 4020 3975 — — 4190 4120 4090 3975 4280 4120 3350 3445 3050 3190 3370 3380 3050 3190 — — 3370 3380 3050 3190 3405 3380 Voltage(1) mV Output LOW Voltage(1) 10ELT 3050 100ELT 3170 mV NOTES: 1. These values are for VCC = 5.0V. Level Specifications will vary 1:1 with VCC. 2 ClockWorks™ SY10ELT20V SY100ELT20V Micrel AC ELECTRICAL CHARACTERISTICS(1) VCC = +3.3V ±10% or +5.0V ±10% TA = –40°C Symbol Parameter TA = 0°C TA = +25°C TA = +85°C Min. Max. Min. Max. Min. Typ. Max. Min. Max. Unit tPLH tPHL Propagation Delay(1) 100 600 100 600 100 — 600 100 600 ps 50Ω to VCC – 2.0V tskpp Part-to-Part Skew(2) — 500 — 500 — — 500 — 500 ps 50Ω to VCC – 2.0V fMAX Maximum Input Frequency 350 — 350 — 350 — — 350 — MHz 50Ω to VCC – 2.0V tr tf Output Rise/Fall Time (20% to 80%) 200 500 200 500 200 — 500 200 500 ps 50Ω to VCC – 2.0V NOTE: 1. Input Rise Time < 1.0ns. 2. Guaranteed by design. Not tested in production. PRODUCT ORDERING INFORMATION Ordering Code Package Type Operating Range SY10ELT20VZC Z8-1 Commercial SY10ELT20VZCTR Z8-1 Commercial SY100ELT20VZC Z8-1 Commercial SY100ELT20VZCTR Z8-1 Commercial 3 Condition ClockWorks™ SY10ELT20V SY100ELT20V Micrel 8 LEAD SOIC .150" WIDE (Z8-1) Rev. 03 MICREL-SYNERGY TEL 3250 SCOTT BOULEVARD SANTA CLARA CA 95054 USA + 1 (408) 980-9191 FAX + 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. © 2000 Micrel Incorporated 4