SY100E111 Micrel Semiconductor, SY100E111 Datasheet

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SY100E111

Manufacturer Part Number
SY100E111
Description
5V/3.3V 1:9 DIFFERENTIAL CLOCK DRIVER (w/ENABLE)
Manufacturer
Micrel Semiconductor
Datasheet

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FEATURES
5V and 3.3V power supply options
200ps part-to-part skew
50ps output-to-output skew
Differential design
V
Enable Input
Voltage and temperature compensated outputs
75K input pulldown resistors
Fully compatible with Motorola MC10/100E111
Available in 28-pin PLCC package
BLOCK DIAGRAM
BB
output
V
EN
IN
IN
BB
Q
Q
Q
Q
Q
Q
Q
Q
Q
Q
Q
Q
Q
Q
Q
Q
Q
Q
0
0
1
1
2
2
3
3
4
4
5
5
6
6
7
7
8
8
5V/3.3V 1:9 DIFFERENTIAL
CLOCK DRIVER (w/ENABLE)
1
drivers designed for clock distribution in mind. The SY10/
100E111AE/LE'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
out to 9 identical differential outputs. An enable input is
also provided such that a logic HIGH disables the device by
forcing all Q outputs LOW and all Q outputs HIGH.
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
lot to lot. The net result is a dependable, guaranteed low
skew device.
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.
be operated from a positive V
This allows the E111AE/LE to be used for high performance
clock distribution in +5V/+3.3V systems. Designers can
take advantage of the E111AE/LE'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.
DESCRIPTION
The SY10/100E111AE/LE are low skew 1-to-9 differential
The E111AE/LE is specifically designed, modeled and
To ensure that the tight skew specification is met it is
The E111AE/LE, as with most other ECL devices, can
BB
output is used. The signal is fanned
CC
SY100E111AE/LE
supply in PECL mode.
SY10E111AE/LE
pd
ClockWorks™
Rev.: D
Rev. Date:
distributions from
Amendment: /0
October, 1998

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SY100E111 Summary of contents

Page 1

... Q 7 power supplies. For systems incorporating GTL, parallel Q 8 termination offers the lowest power by taking advantage the 1.2V supply as terminating voltage. 1 ClockWorks™ SY10E111AE/LE SY100E111AE/LE output is used. The signal is fanned BB distributions from pd supply in PECL mode. CC Rev.: D Amendment: /0 Rev. Date: October, 1998 ...

Page 2

... ClockWorks™ SY10E111AE/LE SY100E111AE/LE = +85 C Typ. Max. Unit mV — –720 — –880 mV — –1595 — –1620 mV — –720 — –880 mV — –1445 — –1475 V — ...

Page 3

... Power Supply Range 100E111AE Series: 10E111AE Series CC. 3 ClockWorks™ SY10E111AE/LE SY100E111AE Min. Typ. Max. Min. Typ. Max. 2320 — 2490 2390 — 2580 2275 — ...

Page 4

... PP (min). PP ClockWorks™ SY10E111AE/LE SY100E111AE/LE Max. Unit ps 630 730 850 850 50 ps 200 0 — ps — ps — ps — mV –0.4 V 600 ps (min limited ...

Page 5

... EN 50 Figure 2. Hold Time 5V V Range Ordering EE Range (V) -4.75 to -5.5 SY10E111AEJI -4.75 to -5.5 SY10E111AEJITR -4.2 to -5.5 SY100E111AEJI -4.2 to -5.5 SY100E111AEJITR 3.3V -3.0 to -3.8 SY10E111LEJI -3.0 to -3.8 SY10E111LEJITR -3.0 to -3.8 SY100E111LEJI -3.0 to -3.8 SY100E111LEJITR 5 SY100E111AE/ 50 Figure 3. Release Time Package Operating Code Type Range J28-1 Industrial J28-1 Industrial J28-1 Industrial J28-1 ...

Page 6

... 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 (408) 914-7878 http://www.micrel.com FAX WEB © 2000 Micrel Incorporated 6 ClockWorks™ SY10E111AE/LE SY100E111AE/LE Rev. 03 ...

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