MPC940LAC IDT, Integrated Device Technology Inc, MPC940LAC Datasheet

MPC940LAC

Manufacturer Part Number

MPC940LAC

Description

IC CLK FANOUT BUFFER 1:18 32LQFP

Manufacturer

IDT, Integrated Device Technology Inc

Type

Clock Distributionr

Datasheet

1.MPC940LAC.pdf (11 pages)

Specifications of MPC940LAC

Input

LVCMOS, LVPECL

Output

LVCMOS

Frequency - Max

250MHz

Voltage - Supply

2.375 V ~ 3.465 V

Operating Temperature

0°C ~ 70°C

Mounting Type

Surface Mount

Package / Case

32-LQFP

Frequency-max

250MHz

Lead Free Status / RoHS Status

Lead free / RoHS Compliant

Other names

800-2009
MPC940LACIDT

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LOW VOLTAGE 1:18 CLOCK DISTRIBUTION CHIP

Pentium II is a trademark of Intel Corporation.

output capabilities. The device features the capability to select either a differential

LVPECL or an LVCMOS compatible input. The 18 outputs are 2.5 V or 3.3 V LVCMOS

compatible and feature the drive strength to drive 50 Ω series or parallel terminated

transmission lines. With output-to-output skews of 150 ps, the MPC940L is ideal as a

clock distribution chip for the most demanding of synchronous systems. The 2.5 V outputs

also make the device ideal for supplying clocks for a high performance microprocessor

based design. For a similar device at a lower price/performance point, the reader is

referred to the MPC9109.

•

output buffers of the MPC940L are ideal for driving series terminated transmission lines.

With a 20 Ω output impedance the 940L has the capability of driving two series terminated

lines from each output. This gives the device an effective fanout of 1:36. If a lower output

impedance is desired please see the MPC942 data sheet.

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 LVCMOS input provides a more standard interface for applications requiring only a

single clock distribution chip at relatively low frequencies. In addition, the two clock sources can be used to provide for a test clock

interface as well as the primary system clock. A logic HIGH on the LVCMOS_CLK_SEL pin will select the LVCMOS level clock input. All

inputs of the MPC940L have internal pullup/pulldown resistors so they can be left open if unused.

with a 3.3 V core and 3.3 V output, a 3.3 V core and 2.5 V outputs as well as a 2.5 V core and 2.5 V outputs. The 32-lead LQFP package

was chosen to optimize performance, board space and cost of the device. The 32-lead LQFP has a 7x7 mm body size with a conservative

0.8 mm pin spacing.

IDT™ / ICS™ 1:18 CLOCK DISTRIBUTION CHIP

The MPC940L is a 1:18 low voltage clock distribution chip with 2.5 V or 3.3 V LVCMOS

With a low output impedance (≈20 Ω), in both the HIGH and LOW logic states, the

The differential LVPECL inputs of the MPC940L allow the device to interface directly

The MPC940L is a single or dual supply device. The device power supply offers a high degree of flexibility. The device can operate

LVPECL or LVCMOS Clock Input

2.5 V LVCMOS Outputs for Pentium II Microprocessor Support

150 ps Maximum Output-to-Output Skew

Maximum Output Frequency of 250 MHz

32-Lead LQFP Packaging

32-Lead Pb-Free Package Available

•

Dual or Single Supply Device:

Dual V

Single 3.3 V V

Single 2.5 V V

Supply Voltage, 3.3 V Core and 2.5 V Output

Supply Voltage for 3.3 V Outputs

Supply Voltage for 2.5 V I/O

32-LEAD LQFP PACKAGE

DISTRIBUTION CHIP

Pb-FREE PACKAGE

MPC940L

LOW VOLTAGE

CASE 873A-04

1:18 CLOCK

MPC940L REV 7 JUNE 5, 2007

FA SUFFIX

AC SUFFIX

MPC940L

Related parts for MPC940LAC

MPC940LAC Summary of contents

Page 1

LOW VOLTAGE 1:18 CLOCK DISTRIBUTION CHIP The MPC940L is a 1:18 low voltage clock distribution chip with 2 3.3 V LVCMOS output capabilities. The device features the capability to select either a differential LVPECL or an LVCMOS compatible ...

Page 2

MPC940L LOW VOLTAGE 1:18 CLOCK DISTRIBUTION CHIP PECL_CLK PECL_CLK LVCMOS_CLK LVCMOS_CLK_SEL (Internal Pulldown) Pinout: 32-Lead LQFP (Top View GNDO MPC940L V 29 CCO ...

Page 3

MPC940L LOW VOLTAGE 1:18 CLOCK DISTRIBUTION CHIP Table 2. Absolute Maximum Ratings Symbol V Supply Voltage CC V Input Voltage I I Input Current IN T Storage Temperature Range Stor 1. Absolute maximum continuous ratings are those values beyond which ...

Page 4

MPC940L LOW VOLTAGE 1:18 CLOCK DISTRIBUTION CHIP Table 5. DC Characteristics (T = 0° to 70° Symbol Characteristic V Input HIGH Voltage IH V Input LOW Voltage IL V Peak-to-Peak Input Voltage PP V Common Mode Range CMR ...

Page 5

MPC940L LOW VOLTAGE 1:18 CLOCK DISTRIBUTION CHIP Table 7. DC Characteristics (T = 0° to 70° Symbol Characteristic V Input HIGH Voltage IH V Input LOW Voltage IL V Peak-to-Peak Input Voltage PP V Common Mode Range CMR ...

Page 6

MPC940L LOW VOLTAGE 1:18 CLOCK DISTRIBUTION CHIP Pulse Generator Z = 50Ω Figure 1. LVCMOS_CLK MPC940L AC Test Reference for V Differential Pulse Generator Z = 50Ω Figure 2. PECL_CLK MPC940L AC Test Reference for V PCLK_CLK V PP PCLK_CLK ...

Page 7

MPC940L LOW VOLTAGE 1:18 CLOCK DISTRIBUTION CHIP IDT™ / ICS™ 1:18 CLOCK DISTRIBUTION CHIP PACKAGE DIMENSIONS CASE 873A-04 ISSUE C 32-LEAD LQFP PACKAGE 7 PAGE MPC940L REV 7 JUNE 5, 2007 ...

Page 8

MPC940L LOW VOLTAGE 1:18 CLOCK DISTRIBUTION CHIP IDT™ / ICS™ 1:18 CLOCK DISTRIBUTION CHIP PACKAGE DIMENSIONS CASE 873A-04 ISSUE C 32-LEAD LQFP PACKAGE 8 PAGE MPC940L REV 7 JUNE 5, 2007 ...

Page 9

MPC940L LOW VOLTAGE 1:18 CLOCK DISTRIBUTION CHIP IDT™ / ICS™ 1:18 CLOCK DISTRIBUTION CHIP PACKAGE DIMENSIONS CASE 873A-04 ISSUE C 32-LEAD LQFP PACKAGE 9 PAGE MPC940L REV 7 JUNE 5, 2007 ...

Page 10

... Table 9. Ordering Information Part/Order Number Marking MPC940LFA MPC940L MPC940LFAR2 MPC940L MPC940LAC MPC940LAC MPC940LACR2 MPC940LAC IDT™ / ICS™ 1:18 CLOCK DISTRIBUTION CHIP Package Shipping Packaging 32 Lead LQFP Tray 32 Lead LQFP 2500 Tape & Reel Lead-Free, 32 Lead LQFP Tray Lead-Free, 32 Lead LQFP 2500 Tape & ...

Page 11

MPC940L LOW VOLTAGE 1:18 CLOCK DISTRIBUTION CHIP Innovate with IDT and accelerate your future networks. Contact: www.IDT.com For Sales For Tech Support 800-345-7015 netcom@idt.com 408-284-8200 480-763-2056 Fax: 408-284-2775 Corporate Headquarters Asia Pacific and Japan Integrated Device Technology, Inc. Integrated Device ...

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