MPC9446AC Freescale Semiconductor, MPC9446AC Datasheet

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MPC9446AC

Manufacturer Part Number
MPC9446AC
Description
IC CLOCK FANOUT BUFFER 32-LQFP
Manufacturer
Freescale Semiconductor
Type
Fanout Buffer (Distribution), Divider, Multiplexerr
Datasheet

Specifications of MPC9446AC

Number Of Circuits
1
Ratio - Input:output
2:10
Differential - Input:output
No/No
Input
LVCMOS
Output
LVCMOS
Frequency - Max
250MHz
Voltage - Supply
2.375 V ~ 3.465 V
Operating Temperature
-40°C ~ 85°C
Mounting Type
Surface Mount
Package / Case
32-LQFP
Frequency-max
250MHz
Lead Free Status / RoHS Status
Lead free / RoHS Compliant

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Freescale Semiconductor
Technical Data
© Freescale Semiconductor, Inc., 2005. All rights reserved.
2.5 V and 3.3 V LVCMOS Clock
Fanout Buffer
designed for low-voltage mid-range to high-performance telecom, networking
and computing applications. Both 3.3 V, 2.5 V and dual supply voltages are
supported for mixed-voltage applications. The MPC9446 offers 10 low-skew
outputs and 2 selectable inputs for clock redundancy. The outputs are
configurable and support 1:1 and 1:2 output to input frequency ratios. The
MPC9446 is specified for the extended temperature range of –40°C to 85°C.
Features
Functional Description
retimed on-chip to ensure minimal skew between the three output banks. Two independent LVCMOS compatible clock inputs are
available. This feature supports redundant clock sources or the addition of a test clock into the system design. Each of the three
output banks can be individually supplied by 2.5 V or 3.3 V supporting mixed voltage applications. The FSELx pins choose be-
tween 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 MPC9446 can be rese,t and the outputs are disabled by deasserting the MR/OE pin (logic high state). Assert-
ing MR/OE will enable the outputs.
50 Ω transmission lines. Please consult the MPC9456 specification for a 1:10 mixed voltage buffer with LVPECL compatible in-
puts. For series terminated transmission lines, each of the MPC9446 outputs can drive one or two traces giving the devices an
effective fanout of 1:20. The device is packaged in a 7x7 mm
The MPC9446 is a 2.5 V and 3.3 V compatible 1:10 clock distribution buffer
The MPC9446 is a full static fanout buffer design supporting clock frequencies up to 250 MHz. The signals are generated and
All inputs accept LVCMOS signals while the outputs provide LVCMOS compatible levels with the capability to drive terminated
Configurable 10 outputs LVCMOS clock distribution buffer
Compatible to single, dual and mixed 3.3 V/2.5 V voltage supply
Designed for mid-range to high-performance telecom, networking
and computer applications
Supports applications requiring clock redundancy
Maximum output skew of 200 ps (150 ps within one bank)
Selectable output configurations per output bank
Tristable outputs
32-lead LQFP package
32-lead Pb-free package available
Ambient operating temperature range of –40 to 85°C
Wide range output clock frequency up to 250 MHz
2
32-lead LQFP package.
DUAL SUPPLY 2.5 V AND 3.3 V
LOW VOLTAGE SINGLE OR
DISTRIBUTION BUFFER
32-LEAD LQFP PACKAGE
32-LEAD LQFP PACKAGE
Pb-FREE PACKAGE
LVCMOS CLOCK
MPC9446
CASE 873A-04
CASE 873A-04
FA SUFFIX
AC SUFFIX
Rev. 3, 08/2005
MPC9446

Related parts for MPC9446AC

MPC9446AC Summary of contents

Page 1

... Please consult the MPC9456 specification for a 1:10 mixed voltage buffer with LVPECL compatible in- puts. For series terminated transmission lines, each of the MPC9446 outputs can drive one or two traces giving the devices an effective fanout of 1:20. The device is packaged in a 7x7 mm © Freescale Semiconductor, Inc., 2005. All rights reserved. MPC9446 LOW VOLTAGE SINGLE OR DUAL SUPPLY 2 ...

Page 2

... Figure 1. MPC9446 Logic Diagram MPC9446 Bank A QA0 QA1 QA2 Bank B QB0 QB1 QB2 QC0 Bank C QC1 QC2 QC3 V is internally connected to V CCB 17 16 QC3 15 GND 14 QC2 13 V CCC 12 QC1 11 GND 10 QC0 9 V CCC 8 Advanced Clock Drivers Devices Freescale Semiconductor CC ...

Page 3

... Absolute maximum continuous ratings are those maximum values beyond which damage to the device may occur. Exposure to these conditions or conditions beyond those indicated may adversely affect device reliability. Functional operation under absolute-maximum-rated conditions is not implied. Advanced Clock Drivers Devices Freescale Semiconductor Type LVCMOS LVCMOS clock inputs ...

Page 4

... Unit Condition (2) 250 MHz (2) 250 MHz FSELx = 0 125 MHz FSELx = 1 ns (3) 1.0 ns 0.8 to 2.0 V 4. 150 ps 200 ps 350 ps 2.25 ns 200 50% REF 25%–75% REF 1.0 ns 0.55 to 2.4 V – Output duty cycle is frequency PLH PHL Advanced Clock Drivers Devices Freescale Semiconductor = VCC IN ...

Page 5

... For all other AC specifications, refer to 2 3.3 V tables according to the supply voltage of the output bank. 3. Output pulse skew t is the absolute difference of the propagation delay times SK(P) dependent (0.5 ± • Q SK(P) OUT Advanced Clock Drivers Devices Freescale Semiconductor = 2.5 V ± 5%, T CCA CCB CCC A Min Typ 1.7 –0.3 1.8 17 – ...

Page 6

... Figure 5. Optimized Dual Line Termination ÷ Ω Ω Ω Ω Ω 3.0 (25 ÷ 1.31 V OutA OutB = 3.8956 t = 3.9386 Time (ns) should be used. In this case, the series Z = 50Ω 22Ω 50Ω 22Ω Ω Ω Advanced Clock Drivers Devices Freescale Semiconductor 14 ...

Page 7

... Figure 9. Output-to-Output Skew 100 The time from the PLL controlled edge to the non controlled edge, divided by the time between PLL controlled edges, expressed as a percentage. Figure 11. Output Duty Cycle (DC) Advanced Clock Drivers Devices Freescale Semiconductor MPC9446 DUT Z = 50Ω 50Ω 3. 2. CCLK 2 ...

Page 8

... MPC9446 8 PACKAGE DIMENSIONS CASE 873A-04 ISSUE C 32-LEAD LQFP PACKAGE PAGE Advanced Clock Drivers Devices Freescale Semiconductor ...

Page 9

... Advanced Clock Drivers Devices Freescale Semiconductor PACKAGE DIMENSIONS CASE 873A-04 ISSUE C 32-LEAD LQFP PACKAGE PAGE MPC9446 9 ...

Page 10

... MPC9446 10 PACKAGE DIMENSIONS CASE 873A-04 ISSUE C 32-LEAD LQFP PACKAGE PAGE Advanced Clock Drivers Devices Freescale Semiconductor ...

Page 11

... Advanced Clock Drivers Devices Freescale Semiconductor NOTES MPC9446 11 ...

Page 12

... Freescale Semiconductor product could create a situation where personal injury or death may occur. Should Buyer ...

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