SY10EL89ZG Microchip

NOT RECOMMENDED FOR NEW DESIGNS COAXIAL SY10EL89 FINAL CABLE DRIVER FEATURES DESCRIPTION 375ps propagation delay The SY10EL89 is a differential fanout gate specifically designed to drive coaxial cables. The device is especially 1.6V output swings useful in Digital Video Broadcast applications. For this Internal 75K input pull-down resistors application, since the system is polarity-free, each output Available in 8-pin SOIC package of the device can be used as an independent driver. The driver boasts a voltage gain of approximately 40 and produces output swings twice as large as a standard ECL output. When driving a coaxial cable, proper termination is required at both ends of the line to minimize signal loss. The 1.6V output swings allow for termination at both ends of the cable while maintaining the required PIN CONFIGURATION/BLOCK DIAGRAM 800mV swing at the receiving end of the cable. Because of the larger output swings, the device cannot be terminated into the standard 2.0V. All of the DC parameters are tested with a 50 to 3.0V load. The Q0 1 8 VCC driver accepts a standard differential ECL input and can run off the Digital Video Broadcast standard 5.0V supply. 2 7 D Q0 3 6 D Q1 PIN NAMES 45 VEE Q1 Pin Function D Data Inputs SOIC Q0, Q1 Data Outputs TOP VIEW Rev.: G Amendment: /0 Issue Date: February 2003 1Micrel SY10EL89 DC ELECTRICAL CHARACTERISTICS V = V (Min.) to V (Max.) V = GND EE EE EE CC T = -40CT = 0CT = +25CT = +85C A A A A Symbol Parameter Min. Typ. Max. Min. Typ. Max. Min. Typ. Max. Min. Typ. Max. Unit I Power Supply Current 18 23 28 18 23 28 18 23 28 18 23 28 mA EE (1) V Output HIGH Voltage 1.23 1.10 0.98 1.17 1.05 0.93 1.13 1.02 0.90 1.06 0.96 0.81 V OH (1) V Output LOW Voltage 2.84 2.72 2.58 2.84 2.70 2.56 2.84 2.70 2.56 2.84 2.67 2.51 V OL V Power Supply Voltage 4.75 5.5 4.75 5.5 4.75 5.5 4.75 5.5 V EE I Input HIGH Current 150 150 150 150 A IH NOTE: 1. V and V specified for 50 to 3.0V load. OH OL AC ELECTRICAL CHARACTERISTICS V = V (Min.) to V (Max.) V = GND EE EE EE CC T = -40CT = 0CT = +25CT = +85C A A A A Symbol Parameter Min. Typ. Max. Min. Typ. Max. Min. Typ. Max. Min. Typ. Max. Unit t Propagation Delay to 200 340 480 250 340 430 260 350 440 310 400 490 ps PLH t Output D PHL t Within-Device Skew 520 520 520 520 ps skew (1) V Minimum Input Swing 150 150 150 150 mV PP (2) V Common Mode Range (2) 0.4 (2) 0.4 (2) 0.4 (2) 0.4 V CMR t Output Rise/Fall Times Q 205 330 455 205 330 455 205 330 455 205 330 455 ps r t (20% to 80%) f NOTES: 1. Minimum input swing for which AC parameters are guaranteed. The device has a DC gain of 40. 2. The CMR range is referenced to the most positive side of the differential input signal. Normal operation is obtained if the HIGH level falls within the specified range and the peak-to-peak voltage lies between V (Min. and 1V. The lower end of the CMR range is dependent on V and is equal to V + 2.5V. PP EE EE 2