PECL-TO-CML TRANSLATOR w/o ENABLE FEATURES ■ ■ ■ ■ ■ ■ ■ ■ PRELIMINARY SY100ELT982 DESCRIPTION Up to 1.25Gbps operation 25mA peak drive current Adjustable output current Separate output enable Differential inputs for data 75KΩ input pulldown resistor Single power supply Available in a tiny 10-pin (3mm) MSOP The SY100ELT982 is a high speed PECL-to-CML translator. The output current is DC current controlled by IRSET, current through the resistor RSET. The output OUT is LOW when output enable is HIGH. The device incorporates complementary open collector outputs with a capability of driving peak current of 25mA. The SY100ELT982 utilizes the high performance bipolar ASSET™ technology. PIN CONFIGURATIONS APPLICATIONS /EN 1 10 VCC DIN 2 9 /OUT /DIN 3 8 OUT VREF 4 7 GND RSET 5 6 GND MSOP K10-1 ■ Telecommunications ■ CML Output Oscillator ■ GaAS Interface BLOCK DIAGRAM VCC RTERM OUT DIN OUT Internal Logic DIN I OUT EN BIAS Control 40X VCC Output Current Control GND VEE RSET VREF RSET Rev.: A 1 Amendment: /1 Issue Date: July 2000 PRELIMINARY SY100ELT982 Micrel TRUTH TABLE(1) PIN NAMES Pin Function D /D /EN OUT (2) /OUT(3) VCC Most positive power supply input, +5V for PECL operation. L H L L H H L L H L GND Ground X X H L H DIN, /DIN Differential PECL 100K compatible inputs. /EN This PECL 100K compatible input enables data translation. When Enable asserted HIGH, OUT = IOUT, /OUT = 0mA. OUT, /OUT Open collector outputs from the output buffer drive these differential current outputs. VREF Voltage reference for use with RSET. RSET External resistor to adjust output current. NOTE: 1. L = LOW, H = HIGH, X = don't care 2. H = IOUT = 0mA 3. H = /IOUT = 0mA ABSOLUTE MAXIMUM RATINGS(1) Symbol Rating Value Unit VCC Power Supply Voltage 0 to +7.0 V VI Input Voltage 0 to +6.0 V IO Output Current TA Operating Temperature Range Tstore Storage Temperature Range Ptot Power Dissipation 25 mA 0˚C to +85˚C ˚C –55˚C to +125˚C ˚C 250 mW 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. OPERATIONING CONDITIONS(1) Symbol Rating VCC Power Supply Voltage RTERM Resistor to Terminate Outputs RSET Resistor to Adjust Current ΘJA Thermal Resistance of Package to COUT Capacitance on OUT + /OUT Ambient(2) NOTES: 1. The voltage drop across RTERM should not be greater than 2V. 2. Still air without heatsink. 2 Value Unit +4.5 to +5.5 V 10 to 50 Ω 1500 to 50,000 Ω 206 ˚C/W 2.5 typical pf PRELIMINARY SY100ELT982 Micrel DC ELECTRICAL CHARACTERISTICS GND = 0V; VCC = +5.0V ±10%; TA = 0°C to + 85°C TA = 0°C Symbol Parameter TA = +25°C TA = +85°C Min. Typ. Max. Min. Typ. Max. Min. Typ. Max. Unit VIH Input HIGH Voltage (Din, /Din, /EN) VCC -1165 — VCC -880 VCC -1165 — VCC -880 VCC -1165 — VCC -880 mV VIL Input LOW Voltage (Din, /Din, /EN) VCC -1810 — VCC -1475 VCC -1810 — VCC -1475 VCC -1810 — VCC -1475 mV VREF Reference Voltage — 3.12 — — 3.00 — — 2.80 — V IIL Input LOW Current(1) (Din, /Din, /EN) 0.5 — — 0.5 — — 0.5 — — uA IIH Input HIGH Current (Din, /Din, /EN) — — 100 — — 100 — — 100 uA ICC Supply Current(2) — 16 25 — 16 25 — 16 25 mA IOL Output LOW Current (/EN = HIGH) — — 500 — — 500 — — 500 uA IOR Output Current Ringing(2) — — 10 — — 10 — — 10 % IGAIN IOUT/IRSET 30 38 44 30 38 44 30 38 44 — NOTES: 1. VI = VIL(Min.) 2. IOH = 25mA. AC ELECTRICAL CHARACTERISTICS(1) IOH =10mA; GND = 0V; VCC = +5V ±10%; TA = 0°C to + 85°C TA = 0°C Symbol Parameter TA = +25°C TA = +85°C Min. Typ. Max. Min. Typ. Max. Min. Typ. Max. Unit tpd D Propagation Delay Din - OUT — 480 1000 — 480 1000 — 480 1000 ps tpd EN Propagation Delay /EN - OUT — 450 1000 — 450 1000 — 450 1000 ps tr tf Rise/Fall Time (20% to 80%) — 200 — — 200 — — 200 — ps IOUT Output Current 5 15 25 5 15 25 5 15 25 mA IRSET Output Current Control 0.125 — — 0.625 mA IOR Output Current Ringing(2) — — — 10 % 0.625 0.125 10 — — — NOTES: 1. RTERM = 50Ω ±1% 2. IOH = 5 to 25mA 3 0.625 0.125 10 — Conditions PRELIMINARY SY100ELT982 Micrel APPLICATION EXAMPLE VCC 50 50 DIN SY100ELT982 DIN EN VRET Logic LOW to enable RSET 50 coaxil 50 coaxil 50 CML INPUT DEVICE Ex. EL16V 1.5K Typical PERFORMANCE CURVES IO and RSET 30 25 IO (mA) 20 15 10 5 0.0 0.0 2.0K 4.0K 6.0K RSET (ohm) PRODUCT ORDERING CODE Ordering Code Package Type Operating Range SY100ELT982KC K10-1 Commercial 4 8.0K 10K 12K PRELIMINARY SY100ELT982 Micrel 10 LEAD MSOP (K10-1) Rev. 00 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