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| COAXIAL CABLE DRIVER SY10EL89 FINAL FEATURES s s s s 375ps propagation delay 1.6V output swings Internal 75K input pull-down resistors Available in 8-pin SOIC package DESCRIPTION The SY10EL89 is a differential fanout gate specifically designed to drive coaxial cables. The device is especially useful in Digital Video Broadcast applications. For this application, since the system is polarity-free, each output 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 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 driver accepts a standard differential ECL input and can run off the Digital Video Broadcast standard -5.0V supply. PIN CONFIGURATION/BLOCK DIAGRAM Q0 Q0 Q1 Q1 1 2 3 4 8 7 6 5 VCC D D VEE PIN NAMES Pin D Data Inputs Data Outputs Function SOIC TOP VIEW Q0, Q1 Rev.: G Amendment: /0 1 Issue Date: February 2003 Micrel SY10EL89 DC ELECTRICAL CHARACTERISTICS VEE = VEE (Min.) to VEE (Max.); VCC = GND TA = -40C Symbol IEE VOH VOL VEE IIH Parameter Power Supply Current Output HIGH Output LOW Voltage(1) Voltage(1) Min. 18 Typ. 23 Max. 28 Min. 18 TA = 0C Typ. 23 Max. 28 18 TA = +25C Min. Typ. 23 Max. 28 18 TA = +85C Min. Typ. 23 Max. 28 Unit mA V V V A -1.23 -1.10 -0.98 -1.17 -1.05 -0.93 -1.13 -1.02 -0.90 -1.06 -0.96 -0.81 -2.84 -2.72 -2.58 -2.84 -2.70 -2.56 -2.84 -2.70 -2.56 -2.84 -2.67 -2.51 -4.75 -- -- -- -5.5 150 -4.75 -- -- -- -5.5 150 -4.75 -- -- -- -5.5 150 -4.75 -- -- -- -5.5 150 Power Supply Voltage Input HIGH Current NOTE: 1. VOH and VOL specified for 50 to -3.0V load. AC ELECTRICAL CHARACTERISTICS VEE = VEE (Min.) to VEE (Max.); VCC = GND TA = -40C Symbol tPLH tPHL tskew VPP VCMR tr tf Parameter Propagation Delay to Output D Within-Device Skew Minimum Input Common Mode Swing(1) Range(2) Min. 200 -- 150 (2) Typ. 340 5 -- -- 330 Max. 480 20 -- -0.4 455 Min. 250 -- 150 (2) 205 TA = 0C Typ. 340 5 -- -- 330 Max. 430 20 -- -0.4 455 TA = +25C Min. 260 -- 150 (2) 205 Typ. 350 5 -- -- 330 Max. 440 20 -- -0.4 455 TA = +85C Min. 310 -- 150 (2) 205 Typ. 400 5 -- -- 330 Max. 490 20 -- -0.4 455 Unit ps ps mV V ps Output Rise/Fall Times Q 205 (20% to 80%) 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 VPP (Min._ and 1V. The lower end of the CMR range is dependent on VEE and is equal to VEE + 2.5V. 2 Micrel SY10EL89 DC BLOCKING CAPACITORS DC BLOCKING CAPACITORS 75 75 COAX EL89 0.1F 75 75 COAX 150 150 0.1F VEE Figure 1. Termination Configuration PRODUCT ORDERING CODE Ordering Code SY10EL89ZC SY10EL89ZCTR* *Tape and Reel Note 1. Recommended for new designs. Package Type Z8-1 Z8-1 Operating Range Commercial Commercial Marking Code HEL89 HEL89 Ordering Code SY10EL89ZI(1) SY10EL89ZITR*(1) Package Type Z8-1 Z8-1 Operating Range Industrial Industrial Marking Code HEL89 HEL89 3 Micrel SY10EL89 8 LEAD SOIC .150" WIDE (Z8-1) Rev. 03 MICREL, INC. TEL 1849 FORTUNE DRIVE SAN JOSE, CA 95131 FAX USA + 1 (408) 944-0800 + 1 (408) 944-0970 WEB http://www.micrel.com The information furnished by Micrel in this datasheet is believed to be accurate and reliable. However, no responsibility is assumed by Micrel for its use. Micrel reserves the right to change circuitry and specifications at any time without notification to the customer. Micrel Products are not designed or authorized for use as components in life support appliances, devices or systems where malfunction of a product can reasonably be expected to result in personal injury. Life support devices or systems are devices or systems that (a) are intended for surgical implant into the body or (b) support or sustain life, and whose failure to perform can be reasonably expected to result in a significant injury to the user. A Purchaser's use or sale of Micrel Products for use in life support appliances, devices or systems is at Purchaser's own risk and Purchaser agrees to fully indemnify Micrel for any damages resulting from such use or sale. (c) 2003 Micrel, Incorporated. 4 |
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