MPC940L Integrated Device Technology, Inc., MPC940L Datasheet

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MPC940L

Manufacturer Part Number
MPC940L
Description
Manufacturer
Integrated Device Technology, Inc.
Datasheet

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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
CC
Supply Voltage, 3.3 V Core and 2.5 V Output
CC
CC
Supply Voltage for 3.3 V Outputs
Supply Voltage for 2.5 V I/O
1
32-LEAD LQFP PACKAGE
32-LEAD LQFP PACKAGE
DISTRIBUTION CHIP
Pb-FREE PACKAGE
MPC940L
LOW VOLTAGE
CASE 873A-04
CASE 873A-04
1:18 CLOCK
MPC940L REV 7 JUNE 5, 2007
FA SUFFIX
AC SUFFIX
MPC940L

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MPC940L Summary of contents

Page 1

... MPC940L have internal pullup/pulldown resistors so they can be left open if unused. The MPC940L is a single or dual supply device. The device power supply offers a high degree of flexibility. The device can operate 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 ...

Page 2

... Core Positive Power Supply Supply Output Negative Power Supply Supply Core Negative Power Supply Q1–Q16 Q17 FUNCTION TABLE LVCMOS_CLK_SEL Input 0 PECL_CLK 1 LVCMOS_CLK POWER SUPPLY VOLTAGES Supply Pin Voltage Level V 2 3.3 V ± 5% CCI 2 3.3 V ± CCO Function MPC940L REV 7 JUNE 5, 2007 ...

Page 3

... CCI 0.8 V 1000 mV V – 0.6 V CCI – 0 ±200 µ per output Ω 28 1.0 mA Max Unit Condition 250 MHz 3.4 ns 3.0 3.7 ns 3.2 150 ps 150 (1) 1.4 ns Note 1.2 (1) 1.7 ns Note 1.4 (2) 850 ps Note 750 55 % Input Input DC = 50% 1.1 ns 0.5 – 2.4 V MPC940L REV 7 JUNE 5, 2007 ...

Page 4

... V V CCI 0.8 V 1000 mV V – 0.6 V CCI – 0 ±200 µ per output Ω 1.0 mA Max Unit Condition 250 MHz 3.5 ns 3.0 3.8 ns 3.3 150 ps 150 (1) 1.5 ns Note 1.3 (1) 1.8 ns Note 1.5 (2) 850 ps Note 750 55 % Input Input DC = 50% 1.2 ns 0.5 – 1.8 V MPC940L REV 7 JUNE 5, 2007 ...

Page 5

... V V CCI 0.8 V 1000 mV V – 0.6 V CCI – 0 ±200 µ per output Ω 28 1.0 mA Max Unit Condition 200 MHz 5.2 ns 4.0 5.0 ns 4.0 200 ps 200 (1) 2.6 ns Note 1.7 (1) 2.2 ns Note 1.7 (2) 1.2 ns Note 1 Input Input DC = 50% 1.2 ns 0.5 - 1.8 V MPC940L REV 7 JUNE 5, 2007 ...

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 Figure 3. Propagation Delay ( The time from the PLL controlled edge to the non controlled edge, divided by the time between PLL controlled edges, expressed as a percentage ...

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

... 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 & Reel 10 Termperature 0°C to 70°C 0°C to 70°C 0°C to 70°C 0°C to 70°C MPC940L REV 7 JUNE 5, 2007 ...

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 Technology 6024 Silver Creek Valley Road Singapore (1997) Pte ...

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