DATASHEET

3.3 V/2.5 V LVCMOS 1:12 Clock Fanout

Buffer

MPC9448

MPC9448 Rev 7 3/15/16

1

©2016 Integrated Device Technology, Inc.

The Freescale Semiconductor, Inc. MPC9448 is a 3.3 V or 2.5 V compatible,

1:12 clock fanout buffer targeted for high performance clock tree applications.

With output frequencies up to 350 MHz and output skews less than 150 ps, the

device meets the needs of most demanding clock applications.

Features

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12 LVCMOS compatible clock outputs

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Selectable LVCMOS and differential LVPECL compatible clock inputs

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Maximum clock frequency of 350 MHz

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Maximum clock skew of 150 ps

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Synchronous output stop in logic low state eliminates output runt pulses

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High-impedance output control

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3.3 V or 2.5 V power supply

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Drives up to 24 series terminated clock lines

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Ambient temperature range -40°C to +85°C

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32-Lead LQFP packaging, Pb-free

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Supports clock distribution in networking, telecommunication and computing

applications

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Pin and function compatible to MPC948

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For drop in replacement part use 83948AYI-147

Functional Description

The MPC9448 is specifically designed to distribute LVCMOS compatible clock

signals up to a frequency of 350 MHz. Each output provides a precise copy of the

input signal with a near zero skew. The outputs buffers support driving of 50

 terminated transmission lines on the incident edge.

Each output is capable of driving either one parallel terminated or two series terminated transmission lines.

Two selectable, independent clock inputs are available, providing support of LVCMOS and differential LVPECL clock distribu-

tion systems. The MPC9448 CLK_STOP control is synchronous to the falling edge of the input clock. It allows the start and stop

of the output clock signal only in a logic low state, thus eliminating potential output runt pulses. Applying the OE control will force

the outputs into high-impedance mode.

All inputs have an internal pull-up or pull-down resistor preventing unused and open inputs from floating. The device supports

a 2.5 V or 3.3 V power supply and an ambient temperature range of -40°C to +85°C. The MPC9448 is pin and function compatible

but performance-enhanced to the MPC948.

LOW VOLTAGE

3.3 V/2.5 V LVCMOS 1:12

CLOCK FANOUT BUFFER

AC SUFFIX

32-LEAD LQFP PACKAGE

Pb-FREE PACKAGE

CASE 873A-03

PRODUCT DISCONTINUATION NOTICE - LAST TIME BUY EXPIRES SEPTEMBER 7, 2016