SEMICONDUCTOR TECHNICAL DATA
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Motorola, Inc. 2000
06/00
The MC100EP222 is a low voltage, low skew 1:15 differential %1 and %2
ECL/PECL clock distribution buffer. The MC100EP222 has been designed
and optimized for 2.5V and 3.3V systems. Target applications for this clock
driver are high performance clock distribution systems for computer,
networking and telecommunication systems.
Features:
15 differential ECL outputs (4 output banks)
2 selectable differential ECL inputs
Selectable 1:1 or 1:2 frequency outputs
150 ps device-to-device skew
50 ps pin-to-pin skew
Operates from a -2.5, -3.3V (ECL) or 2.5, 3.3V (PECL) power supply
Extended temperature operating range of -40 to +85 deg C
For information on thermal characteristics and its impact on operating life
time refer to AN1545, ”Thermal data for MPC clock drivers”
The MC100EP222 device characteristics allows low-skew clock
distribution of differential and single-ended LVECL/LVPECL signals. Typical
applications for the MC100EP222 are primary clock distribution systems on
backplanes of high-performance computer, networking and
telecommunication systems.
The MC100EP222 can be operated from a 3.3V or 2.5V positive supply (PECL mode) without the requirement of a negative
supply line. Each of the four output banks of two, three, four and six differential clock output pairs may be independently configured
to distribute the input frequency or %2 of the input frequency. The FSELA, FSELB, FSELC, FSELD and CLK_SEL are
asychronous control inputs. Any changes of the control inputs require a MR pulse for resynchronization of the the %2 outputs. For
the functionality of the MR control input, “Timing Diagram” on page 2.
Each of the CLK0, CLK1 inputs can be used differential of single-ended. For single-ended signals, connect the bypassed V
BB
output reference to the unused input of the pair.
The MC100EP222 guarantees low output-to-output skew of 50 ps and device-to-device skew of max. 150 ps. To ensure low
skew clock signals in the application, both sides of any differential output pair need to be terminated identically, even if only one
side is used. When fewer than all fifteen pairs are used, identical termination of all output pairs on the same package side is
recommended. If no outputs on a side are used, it is recommended to leave all of these outputs open and unterminated. This will
maintain minimum output skew.
This document contains information on a product under development. Motorola reserves the right to change or discontinue this product without notice.
LOW VOLTAGE 3.3V/2.5V
1:15 DIFFERENTIAL ECL/PECL
CLOCK DRIVER
FA SUFFIX
52–LEAD LQFP PACKAGE
CASE 848D–03