TTL-to-DIFFERENTIAL ECL TRANSLATOR FEATURES ■ ■ ■ ■ ■ SY100ELT24 DESCRIPTION 500ps typical propagation delay Differential ECL output PNP TTL input for minimal loading Flow-through pinouts Available in 8-pin SOIC package The SY100ELT24 is a TTL-to-differential ECL translator. Because ECL levels are used, a +5V, –5.2V (or –4.5V) and ground are required. The small outline 8lead SOIC package and the single gate of the ELT24 makes it ideal for those applications where performance, space and low power are at a premium. PIN CONFIGURATION/BLOCK DIAGRAM PIN NAMES Pin VEE 1 D 2 TTL 8 VCC 7 Q ECL NC 3 6 Q NC 4 5 GND Function Q, Q Differential ECL Output D TTL Input VCC Positive Supply VEE Negative Supply GND Ground SOIC TOP VIEW Rev.: A 1 Amendment: /0 Issue Date: November 1999 SY100ELT24 Micrel ABSOLUTE MAXIMUM RATINGS(1) Symbol Paramter TRUTH TABLE Value Unit D Q Q H H L VCC Power Supply Voltage –0.5 to +7.0 V VI TTL Input Voltage –0.5 to VCC V L L H mA Open H L II TTL Input Current IOUT ECL Output Current — Continuous — Surge –30 to +5.0 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 = 4.5V to 5.5V; VEE = –4.2V to –5.5V TA = –40°C Symbol Parameter TA = 0°C TA = +25°C TA = +85°C Min. Max. Min. Max. Min. Max. Min. Max. Unit Condition ICC Power Supply Current — 10 — 10 — 10 — 10 mA — IEE Power Supply Current — 20 — 20 — 20 — 20 mA No output load AC ELECTRICAL CHARACTERISTICS VCC = 4.5V to 5.5V; VEE = –4.2V to –5.5V 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 tPLH tPHL Propagation Delay 300 900 300 900 300 500 900 300 900 ps 50Ω to –2.0V tr tf Output Rise/Fall Time 20% to 80% 200 700 200 700 200 300 700 200 700 ps 50Ω to –2.0V fMAX Maximum Input Frequency 200 — 200 — 200 — — 200 — MHz 2 SY100ELT24 Micrel TTL DC ELECTRICAL CHARACTERISTICS VCC = 4.5V to 5.5V; VEE = –4.2V to –5.5V TA = –40°C Symbol Parameter TA = 0°C TA = +25°C TA = +85°C Min. Max. Min. Max. Min. 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 — –0.6 — –0.6 — –0.6 — –0.6 mA VIN = 0.5V VIK Input Clamp Voltage — –1.2 — –1.2 — –1.2 — –1.2 V IIN = –18mA ECL DC ELECTRICAL CHARACTERISTICS VCC = 4.5V to 5.5V; VEE = –4.2V to –5.5V TA = –40°C Symbol Parameter TA = 0°C TA = +25°C TA = +85°C Min. Max. Min. Max. Min. Max. Min. Max. Unit Condition VOH Output HIGH Voltage –1085 –880 –1025 –880 –1025 –880 –1025 –880 mV 50Ω to –2.0V VOL Output LOW Voltage –1830 –1555 –1810 –1620 –1810 –1620 –1810 –1620 mV 50Ω to –2.0V PRODUCT ORDERING CODE Ordering Code 3 Package Type Operating Range SY100ELT24ZC Z8-1 Commercial SY100ELT24ZCTR Z8-1 Commercial SY100ELT24 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