MC10EP139, MC100EP139
3.3V / 5V ECL
÷2/4, ÷4/5/6
Clock Generation Chip
The MC10/100EP139 is a low skew
÷2/4, ÷4/5/6
clock generation chip
designed explicitly for low skew clock generation applications. The
internal dividers are synchronous to each other, therefore, the common
output edges are all precisely aligned. The device can be driven by either
a differential or single−ended ECL or, if positive power supplies are used,
LVPECL input signals. In addition, by using the V
BB
output, a sinusoidal
source can be AC coupled into the device. If a single−ended input is to be
used, the V
BB
output should be connected to the CLK input and bypassed
to ground via a 0.01
mF
capacitor.
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. 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.
Upon start−up, the internal flip−flops will attain a random state;
therefore, for systems which utilize multiple EP139s, the master reset
(MR) input must be asserted to ensure synchronization. For systems
which only use one EP139, the MR pin need not be exercised as the
internal divider design ensures synchronization between the
÷2/4
and the
÷4/5/6
outputs of a single device. All V
CC
and V
EE
pins must be
externally connected to power supply to guarantee proper operation.
The 100 Series contains temperature compensation.
Features
Description
http://onsemi.com
MARKING
DIAGRAMS*
1
TSSOP−20
DT SUFFIX
CASE 948E
20
HEP or KEP
139
ALYWG
G
1
SOIC−20
DW SUFFIX
CASE 751D
MCXXXEP139
AWLYYWWG
1
20
1
XXXX
EP139
ALYWG
G
•
Maximum Frequency > 1.0 GHz Typical
•
50 ps Output−to−Output Skew
•
PECL Mode Operating Range: V
CC
= 3.0 V to 5.5 V
•
•
•
•
•
•
•
with V
EE
= 0 V
NECL Mode Operating Range: V
CC
= 0 V
with V
EE
=
−3.0
V to
−5.5
V
Open Input Default State
Safety Clamp on Inputs
Synchronous Enable/Disable
Master Reset for Synchronization of Multiple Chips
V
BB
Output
Pb−Free Packages are Available
QFN−20
MN SUFFIX
CASE 485E
HEP
KEP
XXX
A
L,WL
Y, YY
W, WW
G or
G
= MC10EP
= MC100EP
= 10 or 100
= Assembly Location
= Wafer Lot
= Year
= Work Week
= Pb−Free Package
(Note: Microdot may be in either location)
*For additional marking information, refer to
Application Note AND8002/D.
ORDERING INFORMATION
See detailed ordering and shipping information in the package
dimensions section on page 11 of this data sheet.
©
Semiconductor Components Industries, LLC, 2006
December, 2006
−
Rev. 7
1
Publication Order Number:
MC10EP139/D
ONSEMI [ ON SEMICONDUCTOR ]
