MC10EL34, MC100EL34
5VꢀECL ÷2, ÷4, ÷8 Clock
Generation Chip
Description
The MC10/100EL34 is a low skew ÷2, ÷4, ÷8 clock generation chip
designed explicitly for low skew clock generation applications. The
internal dividers are synchronous to each other, therefore, the common
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output edges are all precisely aligned. The V pin, an internally
BB
generated voltage supply, is available to this device only. For
single-ended input conditions, the unused differential input is
16
1
connected to V as a switching reference voltage. V may also
BB
BB
rebias AC coupled inputs. When used, decouple V and V via a
BB
CC
0.01 mF capacitor and limit current sourcing or sinking to 0.5 mA.
When not used, V should be left open.
BB
SO−16
D SUFFIX
CASE 751B
The common enable (EN) is synchronous so that the internal
dividers will only be enabled/disabled when the internal clock is
already in the LOW state. This avoids any chance of generating a runt
clock pulse on the internal clock when the device is enabled/disabled
as can happen with an asynchronous control. An internal runt pulse
could lead to losing synchronization between the internal divider
stages. The internal enable flip−flop is clocked on the falling edge of
the input clock, therefore, all associated specification limits are
referenced to the negative edge of the clock input.
MARKING DIAGRAMS*
16
1
16
10EL34G
AWLYWW
100EL34G
AWLYWW
Upon startup, the internal flip-flops will attain a random state; the
master reset (MR) input allows for the synchronization of the internal
dividers, as well as multiple EL34s in a system.
1
A
= Assembly Location
= Wafer Lot
= Year
= Work Week
= Pb−Free Package
The 100 Series contains temperature compensation.
WL
YY
WW
G
Features
• 50 ps Output-to-Output Skew
• Synchronous Enable/Disable
• Master Reset for Synchronization
• PECL Mode Operating Range:
*For additional marking information, refer to
Application Note AND8002/D.
V
CC
= 4.2 V to 5.7 V with V = 0 V
EE
ORDERING INFORMATION
See detailed ordering and shipping information in the package
dimensions section on page 7 of this data sheet.
• NECL Mode Operating Range:
= 0 V with V = −4.2 V to −5.7 V
V
CC
EE
• Internal Input 75 kW Pulldown Resistors on CLK(s), EN, and MR
• Pb−Free Packages are Available*
*For additional information on our Pb−Free strategy and soldering details, please
download the ON Semiconductor Soldering and Mounting Techniques
Reference Manual, SOLDERRM/D.
©
Semiconductor Components Industries, LLC, 2006
1
Publication Order Number:
November, 2006 − Rev. 10
MC10EL34/D