DIFFERENTIAL ECL-to-TTL TRANSLATOR FEATURES ■ ■ ■ ■ ■ SY100ELT25 DESCRIPTION 2.6ns typical propagation delay Differential ECL inputs 24mA TTL outputs Flow-through pinouts Available in 8-pin SOIC package The SY100ELT25 is a differential ECL-to-TTL 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 ELT25 makes it ideal for those applications where performance, space and low power are at a premium. The VBB output allows the ELT25 to also be used in a single-ended input mode. In this mode the VBB output is tied to the D input for a non-inverting buffer or the D input for an inverting buffer. If used the VBB pin should be bypassed to ground via a 0.01µF capacitor. PIN NAMES PIN CONFIGURATION/BLOCK DIAGRAM Pin VEE 1 8 VCC D 2 7 Q D 3 6 NC VBB 4 5 GND Function Q TTL Output D Differential ECL Inputs VCC Positive Supply VEE Negative Supply VBB Reference Output GND Ground SOIC TOP VIEW Rev.: A 1 Amendment: /0 Issue Date: October 1999 SY100ELT25 Micrel ABSOLUTE MAXIMUM RATINGS(1) Symbol TRUTH TABLE Value Unit D D Q –0.5 to +7.0 V L H L VEE to GND+0.5 V H L H Open Open L Paramter VCC Power Supply Voltage VIN ECL Input Voltage VOUT Voltage Applied to Output at HIGH State –0.5 to +5.5 V IOUT 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. 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 — 14 — 14 9 14 — 14 mA — IEE Power Supply Current — 14 — 14 5.5 14 — 14 mA — AC 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 tPLH tPHL Propagation Delay D to Output Q 1.7 3.6 1.7 3.6 1.7 3.6 1.7 3.6 ns CL = 20pF fMAX Maximum Frequency 150 — 150 — 150 — 150 — MHz CL = 20pF tr tf Output Rise/Fall Time (1.0V to 2.0V) — 1.5 — 1.5 — 1.5 — 1.5 ns CL = 20pF TTL DC ELECTRICAL CHARACTERISTICS VCC = 4.5V to 5.5V; VEE = –4.2V to –5.5V TA = –40°C Symbol Parameter VOH Output HIGH Voltage VOL Output LOW Voltage IOS Output Short Circuit Current TA = 0°C TA = +25°C TA = +85°C Min. Max. Min. Max. Min. Max. Min. Max. Unit 2.4 — 2.4 — 2.4 — 2.4 — Condition V IOH = –3.0mA — 0.5 — 0.5 — 0.5 — 0.5 V IOL = 24mA –60 –200 –60 –200 –60 –200 –60 –200 mA VOUT = 0V 2 SY100ELT25 Micrel ECL DC ELECTRICAL CHARACTERISTICS VCC = 4.5V to 5.5V; VEE = –4.2V to –5.5V TA = –40°C Symbol Parameter Min. — TA = 0°C Typ. Max. — Min. TA = +25°C Typ. Max. 150 — — — 0.5 — Min. TA = +85°C Typ. Max. — — µA — GND V 200 — — mV –1165 — –880 mV — –1475 –1810 — –1475 mV — –1.26 — –1.26 mV IIL Input HIGH Current 0.5 — VCMR Common Mode Range VEE+2.2 — VPP Minimum Peak-to-Peak Input(1) 200 — — 200 — — 200 — — VIH Input HIGH Voltage –1165 — –880 –1165 — –880 –1165 — –880 VIL Input LOW Voltage –1810 — –1475 –1810 — –1475 –1810 VBB Reference Output –1.38 — –1.26 — –1.26 –1.38 150 — — — 0.5 — GND VEE+2.2 — –1.38 150 — — — 0.5 GND VEE+2.2 NOTE: 1. 200mV input guarantees full logic at output. TTL SWITCHING CIRCUIT VEE VCC Use 0.1µF Capacitors For Decoupling 50Ω COAX IN PULSE GENERATOR 50Ω COAX DEVICE UNDER TEST OUT 450Ω 50Ω COAX CH A Use Oscilloscope Internal 50Ω Load For Termination CH B OSCILLOSCOPE 3 Unit µA Input HIGH Current — Typ. Max. 150 IIH GND VEE+2.2 Min. –1.38 SY100ELT25 Micrel ECL/TTL PROPAGATION DELAY — SINGLE ENDED 50% VIN tPLH tPHL 1.5V VOUT ECL/TTL WAVEFORMS: RISE AND FALL TIMES 2.0V 1V VOUT tf tr PRODUCT ORDERING CODE Ordering Code 4 Package Type Operating Range SY100ELT25ZC Z8-1 Commercial SY100ELT25ZCTR Z8-1 Commercial SY100ELT25 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 5