MC10EP139_16 Datasheet, PDF (1/14 Pages) ON Semiconductor – Clock Generation Chip

MC10EP139, MC100EP139
3.3 V / 5 V ECL ÷2/4, ÷4/5/6
Clock Generation Chip
Description
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 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 the master reset (MR) input may require assertion to ensure
system synchronization. Internal divider design ensures synchronization
between the ÷2/4 and the ÷4/5/6 outputs within a device. All V_CC and
V_EE pins must be externally connected to power supply to guarantee
proper operation.
The V_BB Pin, an internally generated voltage supply, is available to this
device only. For Single-Ended input conditions, the unused differential
input is connected to V_BB as a switching reference voltage. V_BB may also
rebias AC coupled inputs. When used, decouple V_BB and V_CC via a
0.01 mF capacitor and limit current sourcing or sinking to 0.5 mA. When
not used, VBB should be left open.
The 100 Series contains temperature compensation.
Features
• 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
• These Devices are Pb-Free, Halogen Free and are RoHS Compliant
www.onsemi.com
1
1
TSSOP−20 WB
DT SUFFIX
CASE 948E
SOIC−20 WB
DW SUFFIX
CASE 751D
QFN−20
MN SUFFIX
CASE 485E
MARKING DIAGRAMS*
HEP or KEP
139
ALYWG
G
20
MCXXXEP139
AWLYYWWG
1
TSSOP−20 WB SOIC−20 WB
20
1 XXXX
EP139
ALYWG
G
QFN−20
HEP = MC10EP
KEP = MC100EP
XXX = 10 or 100
A
= Assembly Location
L,WL = Wafer Lot
Y, YY = Year
W, WW = Work Week
G or G = 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, 2016
1
August, 2016 − Rev. 14
Publication Order Number:
MC10EP139/D