DESCRIPTION
■375ps propagation delay
■1.6V output swings
■Internal 75KΩ input pull-down resistors
■Available in 8-pin SOIC package
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 50Ω to –3.0V load. The
driver accepts a standard differential ECL input and can
run off the Digital Video Broadcast standard –5.0V supply.
FEATURES
COAXIAL
CABLE DRIVER
PIN CONFIGURATION/BLOCK DIAGRAM
SOIC
TOP VIEW
Pin Function
D Data Inputs
Q0, Q1Data Outputs
1
2
3
45
6
7
8
Q0VCC
D
VEE
D
Q1
Q0
Q1
SY10EL89
FINAL
PIN NAMES
1Rev.: G Amendment: /0
Issue Date: February 2003
2
SY10EL89
Micrel
DC ELECTRICAL CHARACTERISTICS
TA = -40°CT
A = 0°CT
A = +25°CT
A = +85˚C
Symbol Parameter Min. Typ. Max. Min. Typ. Max. Min. Typ. Max. Min. Typ. Max. Unit
IEE Power Supply Current 18 23 28 18 23 28 18 23 28 18 23 28 mA
VOH Output HIGH Voltage(1) –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
VOL Output LOW Voltage(1) –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
VEE Power Supply Voltage –4.75 —–5.5 –4.75 —–5.5 –4.75 —–5.5 –4.75 —–5.5 V
IIH Input HIGH Current ——150 ——150 ——150 ——150 µA
VEE = VEE (Min.) to VEE (Max.); VCC = GND
NOTE:
1. VOH and VOL specified for 50Ω to –3.0V load.
TA = -40°CT
A = 0°CT
A = +25°CT
A = +85˚C
Symbol Parameter Min. Typ. Max. Min. Typ. Max. Min. Typ. Max. Min. Typ. Max. Unit
tPLH Propagation Delay to 200 340 480 250 340 430 260 350 440 310 400 490 ps
tPHL Output D
tskew Within-Device Skew —520—520—520—520ps
VPP Minimum Input Swing(1) 150 ——150 ——150 ——150 ——mV
VCMR Common Mode Range(2) (2) —–0.4 (2) —–0.4 (2) —–0.4 (2) —–0.4 V
trOutput Rise/Fall Times Q 205 330 455 205 330 455 205 330 455 205 330 455 ps
tf(20% to 80%)
AC ELECTRICAL CHARACTERISTICS
VEE = VEE (Min.) to VEE (Max.); VCC = GND
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.
3
SY10EL89
Micrel
PRODUCT ORDERING CODE
Ordering Package Operating Marking
Code Type Range Code
SY10EL89ZC Z8-1 Commercial HEL89
SY10EL89ZCTR* Z8-1 Commercial HEL89
*Tape and Reel
150Ω150Ω
V
EE
EL89
75Ω COAX
75Ω COAX
0.1µF
0.1µF
DC BLOCKING CAPACITORS
75Ω
75Ω
Figure 1. Termination Configuration
DC BLOCKING CAPACITORS
Note 1. Recommended for new designs.
Ordering Package Operating Marking
Code Type Range Code
SY10EL89ZI(1) Z8-1 Industrial HEL89
SY10EL89ZITR*(1) Z8-1 Industrial HEL89
4
SY10EL89
Micrel
8 LEAD SOIC .150" WIDE (Z8-1)
Rev. 03
MICREL, INC. 1849 FORTUNE DRIVE SAN JOSE, CA 95131 USA
TEL + 1 (408) 944-0800 FAX + 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.
© 2003 Micrel, Incorporated.
