2.5V / 3.3V 1:5 Differential
ECL/PECL/HSTL Clock Driver
The MC100LVEP14 is a low skew 1−to−5 differential driver, designed
with clock distribution in mind, accepting two clock sources into an input
multiplexer. The ECL/PECL input signals can be either differential or
single−ended (if the VBB output is used). HSTL inputs can be used when
the LVEP14 is operating under PECL conditions.
The LVEP14 specifically guarantees low output−to−output skew.
Optimal design, layout, and processing minimize skew within a device and
from device to device.
To ensure that the tight skew specification is realized, both sides of
any differential output need to be terminated identically into 50 W
even if only one output is being used. If an output pair is unused, both
outputs may be left open (unterminated) without affecting skew.
The common enable (EN) is synchronous, outputs are enabled/
disabled in the LOW state. This avoids a runt clock pulse when the
device is enabled/disabled as can happen with an asynchronous
control. The internal 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.
The MC100LVEP14, as with most other ECL devices, can be
operated from a positive VCC supply in PECL mode. This allows the
LVEP14 to be used for high performance clock distribution in +3.3 V
or +2.5 V systems. Single−ended CLK input pin operation is limited to
a VCC ≥ 3.0 V in PECL mode, or VEE ≤ −3.0 V in NECL mode.
Designers can take advantage of the LVEP14’s performance to
distribute low skew clocks across the backplane or the board.
• 100 ps Device−to−Device Skew
• 25 ps Within Device Skew
• 400 ps Typical Propagation Delay
• Maximum Frequency > 2 GHz Typical
• The 100 Series Contains Temperature Compensation
• PECL and HSTL Mode:
VCC = 2.375 V to 3.8 V with VEE = 0 V
• NECL Mode:
VCC = 0 V with VEE = −2.375 V to −3.8 V
• LVDS Input Compatible
• Open Input Default State
• These Devices are Pb−Free and are RoHS Compliant
= Assembly Location
= Wafer Lot
= Work Week
= Pb−Free Package
(Note: Microdot may be in either location)
*For additional marking information, refer to
Application Note AND8002/D.
See detailed ordering and shipping information in the package
dimensions section on page 6 of this data sheet.
© Semiconductor Components Industries, LLC, 2014
April, 2014 − Rev. 14
Publication Order Number: