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COAXIAL CABLE DRIVER
SY10EL89
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
PIN NAMES
VEE
Pin D SOIC TOP VIEW Q0, Q1 Data Inputs Data Outputs Function
Rev.: E
Amendment: /0
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Issue Date: August, 1998
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 TA = +25C Min. 18 Typ. 23 Max. 28 TA = +85C Min. 18 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 + 3.0V.
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Micrel
SY10EL89
DC BLOCKING CAPACITORS
DC BLOCKING CAPACITORS
75 75 COAX EL89 0.1F 75 75 COAX 150 150 0.1F 75 75
VEE
Figure 1. Termination Configuration
PRODUCT ORDERING CODE
Ordering Code SY10EL89ZC SY10EL89ZCTR Package Type Z8-1 Z8-1 Operating Range Commercial Commercial
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Micrel
SY10EL89
8 LEAD SOIC .150" WIDE (Z8-1)
Rev. 03
MICREL-SYNERGY
TEL
3250 SCOTT BOULEVARD SANTA CLARA CA 95054 USA
FAX
+ 1 (408) 980-9191
+ 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. (c) 2000 Micrel Incorporated
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