DESCRIPTION
FEATURES
Rev.: F
Amendment: /0
Rev. Date:
October, 1998
ClockWorksTM
SY10E111A/L
SY100E111A/L
FINAL
5V/3.3V 1:9 DIFFERENTIAL
CLOCK DRIVER (w/o ENABLE)
s
5V and 3.3V power supply options
s
200ps part-to-part skew
s
50ps output-to-output skew
s
Differential design
s
V
BB
output
s
Voltage and temperature compensated outputs
s
75K
input pulldown resistors
s
Fully compatible with Motorola MC100LVE111
s
Available in 28-pin PLCC package
The SY10/100E111A/L are low skew 1-to-9 differential
driver designed for clock distribution in mind. The SY10/
100E111A/L's function and performance are similar to the
popular SY10/100E111, with the improvement of lower
jitter and the added feature of low voltage operation. It
accepts one signal input, which can be either differential or
single-ended if the V
BB
output is used. The signal is fanned
out to 9 identical differential outputs.
The E111A/L are specifically designed, modeled and
produced with low skew as the key goal. Optimal design
and layout serve to minimize gate to gate skew within a
device, and empirical modeling is used to determine process
control limits that ensure consistent t
pd
distributions from
lot to lot. The net result is a dependable, guaranteed low
skew device.
To ensure that the tight skew specification is met it is
necessary that both sides of the differential output are
terminated into 50
, even if only one side is being used. In
most applications, all nine differential pairs will be used and
therefore terminated. In the case where fewer that nine
pairs are used, it is necessary to terminate at least the
output pairs on the same package side as the pair(s) being
used on that side, in order to maintain minimum skew.
Failure to do this will result in small degradations of
propagation delay (on the order of 10-20ps) of the output(s)
being used which, while not being catastrophic to most
designs, will mean a loss of skew margin.
The E111A/L, as with most other ECL devices, can be
operated from a positive V
CC
supply in PECL mode. This
allows the E111A/L to be used for high performance clock
distribution in +5V/+3.3V systems. Designers can take
advantage of the E111A/L's performance to distribute low
skew clocks across the backplane or the board. In a PECL
environment, series or Thevenin line terminations are
typically used as they require no additional power supplies.
For systems incorporating GTL, parallel termination offers
the lowest power by taking advantage of the 1.2V supply as
terminating voltage.
BLOCK DIAGRAM
IN
V
BB
Q
0
Q
0
Q
1
Q
1
Q
2
Q
2
Q
3
Q
3
Q
4
Q
4
Q
5
Q
5
Q
6
Q
6
Q
7
Q
7
Q
8
Q
8
IN
1
3
ClockWorksTM
SY10E111A/L
SY100E111A/L
Micrel
3.3V PECL DC ELECTRICAL CHARACTERISTICS
(1)
V
CC
= +3.0V to +3.8V, V
EE
= GND
T
A
= 40
C
T
A
= 0
C
T
A
= +25
C
T
A
= +85
C
Symbol
Parameter
Min.
Typ.
Max.
Min.
Typ.
Max.
Min.
Typ.
Max.
Min.
Typ.
Max.
Unit
V
OH
Output HIGH Voltage
(2)
mV
10EL
2220
--
2110
2280
--
2460
2320
--
2490
2390
--
2580
100EL
2215
--
2120
2275
--
2420
2275
--
2420
2275
--
2420
V
OL
Output LOW Voltage
(2)
mV
10EL
1350
--
1650
1350
--
1670
1350
--
1670
1350
--
1705
100EL
1470
--
1750
1490
--
1680
1490
--
1680
1490
--
1680
V
IH
Input HIGH Voltage
(2)
mV
10EL
2070
--
2410
2130
--
2460
2170
--
2490
2240
--
2580
100EL
2135
--
2420
2135
--
2420
2135
--
2420
2135
--
2420
V
IL
Input LOW Voltage
(2)
mV
10EL
1350
--
1800
1350
--
1820
1350
--
1820
1350
--
1855
100EL
1490
--
1825
1490
--
1825
1490
--
1825
1490
--
1825
V
BB
Output Reference
V
Voltage
(2)
10EL
1.87
--
2.00
1.92
--
2.03
1.95
--
2.05
1.99
--
2.11
100EL
1.92
--
2.04
1.92
--
2.04
1.92
--
2.04
1.92
--
2.04
I
IH
Input HIGH Current
--
--
150
--
--
150
--
--
150
--
--
150
A
I
IL
Input LOW Current
A
10EL
0.5
--
--
0.5
--
--
0.5
--
--
0.3
--
--
100EL
0.5
--
--
0.5
--
--
0.5
--
--
0.5
--
--
I
EE
Power Supply Current
mA
10EL
--
--
66
--
--
66
--
--
66
--
--
66
100EL
--
--
66
--
--
66
--
--
66
--
--
78
NOTES:
1. Parametric values specified at:
3 volt Power Supply Range
10/100E111L Series:
+3.0V to +3.8V.
2. These values are for V
CC
= 3.3V. Level specifications will vary 1:1 with V
CC.
5V PECL DC ELECTRICAL CHARACTERISTICS
(1)
V
CC
= V
CC
(Min.) to V
CC
(Max.); V
EE
= GND
T
A
= 40
C
T
A
= 0
C
T
A
= +25
C
T
A
= +85
C
Symbol
Parameter
Min.
Typ.
Max.
Min.
Typ.
Max.
Min.
Typ.
Max.
Min.
Typ.
Max.
Unit
V
OH
Output HIGH Voltage
(2)
mV
10EL
3920
--
4110
3980
--
4160
4020
--
4190
4090
--
4280
100EL
3915
--
4120
3975
--
4120
3975
--
4120
3975
--
4120
V
OL
Output LOW Voltage
(2)
mV
10EL
3050
--
3350
3050
--
3370
3050
--
3370
3050
--
3405
100EL
3170
--
3450
3190
--
3380
3190
--
3380
3190
--
3380
V
IH
Input HIGH Voltage
(2)
mV
10EL
3770
--
4110
3830
--
4160
3870
--
4190
3940
--
4280
100EL
3835
--
4120
3835
--
4120
3835
--
4120
3835
--
4120
V
IL
Input LOW Voltage
(2)
mV
10EL
3050
--
3500
3050
--
3520
3050
--
3520
3050
--
3555
100EL
3190
--
3525
3190
--
3525
3190
--
3525
3190
--
3525
V
BB
Output Reference
V
Voltage
(2)
10EL
3.57
--
3.70
3.62
--
3.73
3.65
--
3.75
3.69
--
3.81
100EL
3.62
--
3.74
3.62
--
3.74
3.62
--
3.74
3.62
--
3.74
I
IH
Input HIGH Current
--
--
150
--
--
150
--
--
150
--
--
150
A
I
IL
Input LOW Current
A
10EL
0.5
--
--
0.5
--
--
0.5
--
--
0.3
--
--
100EL
0.5
--
--
0.5
--
--
0.5
--
--
0.5
--
--
I
EE
Power Supply Current
mA
10EL
--
--
66
--
--
66
--
--
66
--
--
66
100EL
--
--
66
--
--
66
--
--
66
--
--
78
NOTES:
1. Parametric values specified at:
5 volt Power Supply Range
100E111A Series:
+4.2V to +5.5V.
10E111A Series
+4.75V to +5.5V.
2. These values are for V
CC
= 5V. Level specifications will vary 1:1 with V
CC.
4
ClockWorksTM
SY10E111A/L
SY100E111A/L
Micrel
V
EE
= V
EE
(Min.) to V
EE
(Max.); V
CC
= GND
T
A
= -40
C
T
A
= 0
C
T
A
= +25
C
T
A
= +85
C
Symbol
Parameter
Min.
Typ. Max.
Min.
Typ. Max. Min.
Typ. Max. Min.
Typ. Max. Unit
t
PLH
Propagation Delay to Output
ps
t
PHL
IN (differential)
(2)
380
--
680
430
--
630
430
--
630
430
--
630
IN (single-ended)
(3)
280
--
780
330
--
730
330
--
730
330
--
730
t
skew
Within-Device Skew
(4)
--
--
75
--
--
50
--
--
50
--
--
50
ps
Part-to-Part Skew (Diff.)
--
--
250
--
--
200
--
--
200
--
--
200
V
PP
Minimum Input Swing
(5)
250
--
--
250
--
--
250
--
--
250
--
--
mV
V
CMR
Common Mode Range
(6)
1.5
--
0.4
1.5
--
0.4
1.5
--
0.4
1.5
--
0.4
V
t
r
Rise/Fall Times
200
--
650
200
--
600
200
--
600
200
--
600
ps
t
f
20% to 80%
AC ELECTRICAL CHARACTERISTICS
NOTES:
1. Parametric values specified at:
5 volt Power Supply Range
100E111A Series:
-4.2V to -5.5V.
10E111A Series
-4.75V to -5.5V.
3 volt Power Supply Range
10/100E111L Series:
-3.0V to -3.8V.
2. The differential propagation delay is defined as the delay from the crossing points of the differential input signals to the crossing point of the
differential output signals.
3. The single-ended propagation delay is defined as the delay from the 50% point of the input signal to the 50% point of the output signal.
4. The within-device skew is defined as the worst case difference between any two similar delay paths within a single device.
5. V
PP
(min) is defined as the minimum input differential voltage which will cause no increase in the propagation delay. The V
PP
(min) is AC limited for
the E111A/L as a differential input as low as 50mV will still produce full ECL levels at the output.
6. V
CMR
is defined as the range within the V
IH
level may vary, with the device still meeting the propagation delay specification. The V
IL
level must be
such that the peak-to-peak voltage is less than 1.0V and greater than or equal to V
PP
(min).
For PECL operation: V
CMR
(max) = V
CC
|V
CMR
(max)| and
V
CMR
(min) = V
CC
|V
CMR
(min)|
Ordering
Package
Operating
V
EE
Range
Code
Type
Range
(V)
SY10E111AJC
J28-1
Commercial
-4.75 to -5.5
SY10E111AJCTR
J28-1
Commercial
-4.75 to -5.5
SY100E111AJC
J28-1
Commercial
-4.2 to -5.5
SY100E111AJCTR
J28-1
Commercial
-4.2 to -5.5
PRODUCT ORDERING CODE
SY10E111LJC
J28-1
Commercial
-3.0 to -3.8
SY10E111LJCTR
J28-1
Commercial
-3.0 to -3.8
SY100E111LJC
J28-1
Commercial
-3.0 to -3.8
SY100E111LJCTR
J28-1
Commercial
-3.0 to -3.8
5V
3.3V
Ordering
Package
Operating
V
EE
Range
Code
Type
Range
(V)
SY10E111AJI
J28-1
Industrial
-4.75 to -5.5
SY10E111AJITR
J28-1
Industrial
-4.75 to -5.5
SY100E111AJI
J28-1
Industrial
-4.2 to -5.5
SY100E111AJITR
J28-1
Industrial
-4.2 to -5.5
SY10E111LJI
J28-1
Industrial
-3.0 to -3.8
SY10E111LJITR
J28-1
Industrial
-3.0 to -3.8
SY100E111LJI
J28-1
Industrial
-3.0 to -3.8
SY100E111LJITR
J28-1
Industrial
-3.0 to -3.8
5V
3.3V
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