FEATURES
Low skew
Extended 100E V
Guaranteed skew limits
Differential design
V
Enable input
Fully compatible with industry standard 10KH, 100K
I/O levels
75K input pulldown resistors
Fully compatible with Motorola MC10E/100E111
Available in 28-pin PLCC package
BLOCK DIAGRAM
BB
V
EN
BB
output
IN
IN
EE
range of –4.2V to –5.5V
1:9 DIFFERENTIAL CLOCK
DRIVER WITH ENABLE
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
1
drivers designed for clock distribution in new, high-
performance ECL systems. They accept one differential or
single-ended input, with V
operation. The signal is fanned out to nine 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.
skew. The interconnect scheme and metal layout are
carefully optimized for minimal gate-to-gate skew within
the device. Wafer characterization and process control
ensure consistent distribution of propagation delay from lot
to lot. Since the E111 shares a common set of “basic”
processing with the other members of the ECLinPS family,
wafer characterization at the point of device personalization
allows for tighter control of parameters, including
propagation delay.
necessary that both sides of the differential output are
terminated into 50 , even if only one side is being used. ln
most applications, all nine differential pairs will be used
and, therefore, terminated. In the case where fewer than
nine pairs are used, it is necessary to terminate at least the
output pairs on the same package side (i.e. sharing the
same V
to maintain minimum skew.
voltage for single-ended reception of ECL signals to that
device only. When using V
recommended that V
capacitor.
DESCRIPTION
The SY10/100E111 are low skew 1-to-9 differential
The device is specifically designed and produced for low
To ensure that the skew specification is met, it is
The V
CCO
BB
as the pair(s) being used on that side) in order
output is intended for use as a reference
BB
is decoupled to V
BB
BB
used for single-ended
for this purpose, it is
ClockWorks™
Rev.: B
Issue Date: February, 1998
SY100E111
CC
SY10E111
via a 0.01 F
Amendment: /2