MPC942PFA

MPC942PFA Datasheet

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Part	Datasheet
MPC942PFA	MPC942PFA (pdf)

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Freescale Semiconductor, Inc... MOTOROLA Freescale Semiconductor, Inc. SEMICONDUCTOR TECHNICAL DATA Order this document by MPC942P/D Low Voltage 1:18 Clock Distribution Chip MPC942P The MPC942 is a 1:18 low voltage clock distribution chip with 2.5V or 3.3V LVCMOS output capabilities. The device is offered in two versions the MPC942C has an LVCMOS input clock while the MPC942P has a LVPECL input clock. The 18 outputs are 2.5V or 3.3V LVCMOS compatible and feature the drive strength to drive series or parallel terminated transmission lines. With skews of 200ps, the MPC942 is ideal as a clock distribution chip for the most demanding of synchronous systems. The 2.5V outputs also make the device ideal for supplying clocks for a high performance Pentium II microprocessor based design. LOW VOLTAGE 1:18 CLOCK DISTRIBUTION CHIP • LVPECL Clock Input • 2.5V LVCMOS Outputs for Pentium II Microprocessor Support • 200ps Maximum Targeted Skew • Maximum Output Frequency of 250MHz VCC • LQFP Packaging • Single 3.3V or 2.5V Supply With a low output impedance in both the HIGH and LOW logic states, the output buffers of the MPC942 are ideal for driving series terminated transmission lines. With an output impedance of the MPC942 can drive two series terminated transmission lines from each output. This capability gives the MPC942 an effective fanout of The MPC942 provides enough copies of low skew clocks for most high performance synchronous systems. FA SUFFIX LQFP PACKAGE CASE The differential LVPECL inputs of the MPC942P allow the device to interface directly with a LVPECL fanout buffer like the MC100EP111 to build very wide clock fanout trees or to couple to a high frequency clock source. The OE pins will place the outputs into a high impedance state. The OE pin has an internal pullup resistor. The MPC942 is a single supply device. The VCC power pins require either 2.5V or 3.3V. The LQFP package was chosen to optimize performance, board space and cost of the device. The LQFP has a 7x7mm body size with a conservative 0.8mm pin spacing. Pentium II is a trademark of Intel Corporation. 02/01 Motorola, Inc. 2001 Freescale Semiconductor, Inc... MPC942P Freescale Semiconductor, Inc. LOGIC DIAGRAM MPC942P Block Diagram PECL_CLK OE Int. Pullup Q0 Q1:Q16 Q17 FUNCTION TABLE Output HIGH IMPEDANCE OUTPUTS ENABLED Pinout Top View 24 23 22 21 20 19 18 17 MPC942P 12345678 PECL_CLK

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Freescale Semiconductor, Inc...

MOTOROLA

Freescale Semiconductor, Inc.

SEMICONDUCTOR TECHNICAL DATA

Order this document by MPC942P/D

Low Voltage 1:18 Clock Distribution Chip

MPC942P

The MPC942 is a 1:18 low voltage clock distribution chip with 2.5V or 3.3V LVCMOS output capabilities. The device is offered in two versions the MPC942C has an LVCMOS input clock while the MPC942P has a LVPECL input clock. The 18 outputs are 2.5V or 3.3V LVCMOS compatible and feature the drive strength to drive series or parallel terminated transmission lines. With skews of 200ps, the MPC942 is ideal as a clock distribution chip for the most demanding of synchronous systems. The 2.5V outputs also make the device ideal for supplying clocks for a high performance Pentium II microprocessor based design.

LOW VOLTAGE 1:18 CLOCK

DISTRIBUTION CHIP
• LVPECL Clock Input
• 2.5V LVCMOS Outputs for Pentium II Microprocessor Support
• 200ps Maximum Targeted Skew
• Maximum Output Frequency of 250MHz VCC
• LQFP Packaging
• Single 3.3V or 2.5V Supply

With a low output impedance in both the HIGH and LOW logic states, the output buffers of the MPC942 are ideal for driving series terminated transmission lines. With an output impedance of the MPC942 can drive two series terminated transmission lines from each output. This capability gives the MPC942 an effective fanout of The MPC942 provides enough copies of low skew clocks for most high performance synchronous systems.

FA SUFFIX LQFP PACKAGE

CASE

The differential LVPECL inputs of the MPC942P allow the device to interface directly with a LVPECL fanout buffer like the MC100EP111 to build very wide clock fanout trees or to couple to a high frequency clock source. The OE pins will place the outputs into a high impedance state. The OE pin has an internal pullup resistor.

The MPC942 is a single supply device. The VCC power pins require either 2.5V or 3.3V. The LQFP package was chosen to optimize performance, board space and cost of the device. The LQFP has a 7x7mm body size with a
conservative 0.8mm pin spacing.

Pentium II is a trademark of Intel Corporation.
02/01

Motorola, Inc. 2001

Freescale Semiconductor, Inc...

MPC942P

Freescale Semiconductor, Inc.

LOGIC DIAGRAM

MPC942P Block Diagram

PECL_CLK

OE Int. Pullup

Q0 Q1:Q16 Q17

FUNCTION TABLE

Output

HIGH IMPEDANCE

OUTPUTS ENABLED

Pinout Top View
24 23 22 21 20 19 18 17

MPC942P
12345678

PECL_CLK

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Datasheet ID: MPC942PFA 635573