DESCRIPTION
s
375ps propagation delay
s
1.6V output swings
s
Internal 75K
input pull-down resistors
s
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 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.
FEATURES
COAXIAL
CABLE DRIVER
PIN CONFIGURATION/BLOCK DIAGRAM
SOIC
TOP VIEW
Pin
Function
D
Data Inputs
Q
0
, Q
1
Data Outputs
1
2
3
4
5
6
7
8
Q
0
V
CC
D
V
EE
D
Q
1
Q
0
Q
1
SY10EL89
Rev.: E
Amendment: /0
Issue Date:
August, 1998
PIN NAMES
1
2
SY10EL89
Micrel
DC ELECTRICAL CHARACTERISTICS
T
A
= -40
C
T
A
= 0
C
T
A
= +25
C
T
A
= +85C
Symbol
Parameter
Min.
Typ.
Max.
Min.
Typ.
Max.
Min.
Typ.
Max.
Min.
Typ.
Max.
Unit
I
EE
Power Supply Current
18
23
28
18
23
28
18
23
28
18
23
28
mA
V
OH
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
V
OL
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
V
EE
Power Supply Voltage
4.75
--
5.5
4.75
--
5.5
4.75
--
5.5
4.75
--
5.5
V
I
IH
Input HIGH Current
--
--
150
--
--
150
--
--
150
--
--
150
A
V
EE
= V
EE
(Min.) to V
EE
(Max.); V
CC
= GND
NOTE:
1. V
OH
and V
OL
specified for 50
to 3.0V load.
T
A
= -40
C
T
A
= 0
C
T
A
= +25
C
T
A
= +85C
Symbol
Parameter
Min.
Typ.
Max.
Min.
Typ.
Max.
Min.
Typ.
Max.
Min.
Typ.
Max.
Unit
t
PLH
Propagation Delay to
200
340
480
250
340
430
260
350
440
310
400
490
ps
t
PHL
Output D
t
skew
Within-Device Skew
--
5
20
--
5
20
--
5
20
--
5
20
ps
V
PP
Minimum Input Swing
(1)
150
--
--
150
--
--
150
--
--
150
--
--
mV
V
CMR
Common Mode Range
(2)
(2)
--
0.4
(2)
--
0.4
(2)
--
0.4
(2)
--
0.4
V
t
r
Output Rise/Fall Times Q
205
330
455
205
330
455
205
330
455
205
330
455
ps
t
f
(20% to 80%)
AC ELECTRICAL CHARACTERISTICS
V
EE
= V
EE
(Min.) to V
EE
(Max.); V
CC
= 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 V
PP
min. and 1V. The lower end of the CMR range is dependent on V
EE
and is equal to V
EE
+ 3.0V.
3
SY10EL89
Micrel
PRODUCT ORDERING CODE
Ordering
Package
Operating
Code
Type
Range
SY10EL89ZC
Z8-1
Commercial
SY10EL89ZCTR
Z8-1
Commercial
150
150
V
EE
EL89
75
COAX
75
75
COAX
75
0.1
F
0.1
F
DC BLOCKING CAPACITORS
75
75
Figure 1. Termination Configuration
DC BLOCKING CAPACITORS
4
SY10EL89
Micrel
8 LEAD SOIC .150" WIDE (Z8-1)
Rev. 03
MICREL-SYNERGY
3250 SCOTT BOULEVARD
SANTA CLARA
CA 95054
USA
TEL
+ 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
PDF 
ZIP