MOTOROLA
SEMICONDUCTOR TECHNICAL DATA
1:9 Differential Clock Driver
MC10E111
MC100E111
The MC10E/100E111 is a low skew 1-to-9 differential driver, designed
with clock distribution in mind. It accepts one signal input, which can be
either differential or else single-ended if the VBB output is used. The
signal is fanned out to 9 identical differential outputs. An enable input is
also provided. A HIGH disables the device by forcing all Q outputs LOW
and all Q outputs HIGH.
•
•
•
•
•
•
•
Low Skew
Guarateed Skew Spec
Differential Design
VBB Output
Enable
Extended 100E VEE Range of –4.2 to –5.46V
75kΩ Input Pulldown Resistors
1:9 DIFFERENTIAL
CLOCK DRIVER
The device is specifically designed, modeled and produced with low
skew as the key goal. Optimal design and layout serve to minimize gate to
gate skew within-device, and empirical modeling is used to determine
process control limits that ensure consistent tpd 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 50Ω, 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 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 VCCO) 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.
FN SUFFIX
PLASTIC PACKAGE
CASE 776-02
LOGIC SYMBOL
Q0
Q0
PIN NAMES
Pin
Function
IN, IN
EN
Q0, Q0–Q8, Q8
VBB
Q1
Q1
Differential Input Pair
Enable
Differential Outputs
VBB Output
Q2
Q2
Q0
Q0
Q1 VCCO Q1
Q2
25
24
23
20
Q3
Q3
Q2
19
22
21
IN
VEE
26
18
Q3
IN
EN
27
17
Q3
EN
IN
28
16
Q4
15
VCCO
Pinout: 28-Lead PLCC
(Top View)
VCC
1
IN
2
14
3
13
Q5
NC
4
12
Q5
5
6
7
Q8
Q8
Q7
8
9
VCCO Q7
10
Q7
Q7
VBB
11
Q6
Q6
5/95
© Motorola, Inc. 1996
2–1
Q5
Q5
Q6
Q6
Q4
VBB
Q4
Q4
REV 3
Q8
Q8
