MOTOROLA

SEMICONDUCTOR TECHNICAL DATA

Order Number: MPC9456/D

Rev 1, 03/2002

1

2.5V and 3.3V LVCMOS Clock

Fanout Buffer

The MPC9456 is a 2.5V and 3.3V compatible 1:10 clock distribution

buffer designed for low-voltage mid-range to high-performance telecom,

networking and computing applications. Both 3.3V, 2.5V and dual supply

voltages are supported for mixed-voltage applications. The MPC9456

offers 10 low-skew outputs and a differential LVPECL clock input. The

outputs are configurable and support 1:1 and 1:2 output to input

frequency ratios. The MPC9456 is specified for the extended temperature

range of –40 to 85

°C.

Features

computer applications

Functional Description

The MPC9456 is a full static design supporting clock frequencies up to

250 MHz. The signals are generated and retimed on-chip to ensure

minimal skew between the three output banks.

Each of the three output banks can be individually supplied by 2.5V or 3.3V supporting mixed voltage applications. The FSELx

pins choose between division of the input reference frequency by one or two. The frequency divider can be set individually for

each of the three output banks. The MPC9456 can be reset and the outputs are disabled by deasserting the MR/OE pin (logic

high state). Asserting MR/OE will enable the outputs.

All control inputs accept LVCMOS signals while the outputs provide LVCMOS compatible levels with the capability to drive

terminated 50

Ω transmission lines. The clock input is low voltage PECL compatible for differential clock distribution support.

Please consult the MPC9446 specification for a full CMOS compatible device. For series terminated transmission lines, each of

the MPC9456 outputs can drive one or two traces giving the devices an effective fanout of 1:20. The device is packaged in a 7x7

mm2 32-lead LQFP package.

FA SUFFIX

LQFP PACKAGE

CASE 873A–02

MPC9456

LOW VOLTAGE SINGLE OR

DUAL SUPPLY 2.5V AND 3.3V

LVCMOS CLOCK

DISTRIBUTION BUFFER

Freescale Semiconductor, Inc.

For More Information On This Product,

Go to: www.freescale.com