MPC9239EI IDT, Integrated Device Technology Inc, MPC9239EI Datasheet

MPC9239EI

Manufacturer Part Number

MPC9239EI

Description

IC CLK SYNTH LV PECL 28-PLCC

Manufacturer

IDT, Integrated Device Technology Inc

Type

Clock/Frequency Synthesizerr

Datasheet

1.MPC9239ACR2.pdf (14 pages)

Specifications of MPC9239EI

Pll

Yes

Input

Crystal

Output

LVPECL

Number Of Circuits

Ratio - Input:output

1:1

Differential - Input:output

No/Yes

Frequency - Max

900MHz

Divider/multiplier

Yes/No

Voltage - Supply

3.135 V ~ 3.465 V

Operating Temperature

-40°C ~ 85°C

Mounting Type

Surface Mount

Package / Case

28-PLCC

Frequency-max

900MHz

Lead Free Status / RoHS Status

Lead free / RoHS Compliant

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IDT™ 900 MHz Low Voltage LVPECL Clock Synthesizer

Freescale Timing Solutions Organization has been acquired by Integrated Device Technology, Inc

900 MHz Low Voltage LVPECL Clock

Synthesizer

Freescale Semiconductor

Technical Data

900 MHz Low Voltage LVPECL

Clock Synthesizer

high performance clock generation in mid-range to high-performance telecom,

networking, and computing applications. With output frequencies from

3.125 MHz to 900 MHz and the support of differential LVPECL output signals the

device meets the needs of the most demanding clock applications.

Features

•

Functional Description

its frequency reference. The frequency of the internal crystal oscillator or external

reference clock signal is multiplied by the PLL. The VCO within the PLL operates over a range of 800 to 1800 MHz. Its output is

scaled by a divider that is configured by either the serial or parallel interfaces. The crystal oscillator frequency f

feedback-divider M and the PLL post-divider N determine the output frequency.

by adjusting the VCO control voltage. Note that for some values of M (either too high or too low) the PLL will not achieve phase

lock. The PLL will be stable if the VCO frequency is within the specified VCO frequency range (800 to 1800 MHz). The M-value

must be programmed by the serial or parallel interface.

ratios (1, 2, 4, or 8). This divider extends performance of the part while providing a 50% duty cycle. The output driver is driven

differentially from the output divider, and is capable of driving a pair of transmission lines terminated 50 Ω to V

positive supply voltage for the internal PLL is separated from the power supply for the core logic and output drivers to minimize

noise induced jitter.

inputs to configure the internal counters. It is recommended on system reset to hold the P_LOAD input LOW until power becomes

valid. On the LOW-to-HIGH transition of P_LOAD, the parallel inputs are captured. The parallel interface has priority over the

serial interface. Internal pullup resistors are provided on the M[6:0] and N[1:0] inputs prevent the LVCMOS compatible control

inputs from floating. The serial interface centers on a twelve bit shift register. The shift register shifts once per rising edge of the

S_CLOCK input. The serial input S_DATA must meet setup and hold timing as specified in the AC Characteristics section of this

document. The configuration latches will capture the value of the shift register on the HIGH-to-LOW edge of the S_LOAD input.

Refer to the programming section for more information. The TEST output reflects various internal node values, and is controlled

by the T[2:0] bits in the serial data stream. In order to minimize the PLL jitter, it is recommended to avoid active signal on the

TEST output. The PWR_DOWN pin, when asserted, will synchronously divide the f

clocked by the PLL reference clock, thereby causing the frequency reduction to happen relatively slowly. Upon de-assertion of

the PWR_DOWN pin, the f

The MPC9239 is a 3.3 V compatible, PLL based clock synthesizer targeted for

The internal crystal oscillator uses the external quartz crystal as the basis of

The feedback path of the PLL is internal. The PLL adjusts the VCO output frequency to be M times the reference frequency

The PLL post-divider N is configured through either the serial or the parallel interfaces, and can provide one of four division

The configuration logic has two sections: serial and parallel. The parallel interface uses the values at the M[6:0] and N[1:0]

3.125 MHz to 900 MHz synthesized clock output signal

Differential LVPECL output

LVCMOS compatible control inputs

On-chip crystal oscillator for reference frequency generation

Alternative LVCMOS compatible reference input

3.3 V power supply

Fully integrated PLL

Minimal frequency overshoot

Serial 3-wire programming interface

Parallel programming interface for power-up

28 PLCC and 32 LQFP packaging

28-lead and 32-lead Pb-free package available

SiGe Technology

Ambient temperature range 0°C to + 70°C

Pin and function compatible to the MC12439

OUT

input will step back up to its programmed frequency in four discrete increments.

OUT

by 16. The power down sequence is

900 MHz LOW VOLTAGE

CLOCK SYNTHESIZER

MPC9239

28-LEAD PLCC PACKAGE

32-LEAD LQFP PACKAGE

Pb-FREE PACKAGE

CASE 873A-04

CASE 776-02

FN SUFFIX

FA SUFFIX

AC SUFFIX

EI SUFFIX

DATA SHEET

Rev. 3, 08/2005

XTAL

– 2.0 V. The

, the PLL

MPC9239

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MPC9239EI Summary of contents

Page 1

Freescale Semiconductor Technical Data 900 MHz Low Voltage LVPECL Clock 900 MHz Low Voltage LVPECL Synthesizer Clock Synthesizer The MPC9239 is a 3.3 V compatible, PLL based clock synthesizer targeted for high performance clock generation in mid-range to high-performance telecom, ...

Page 2

MPC9239 900 MHz Low Voltage LVPECL Clock Synthesizer XTAL_IN 1 XTAL XTAL_OUT 10 – 20 MHz 0 f REF_EXT V CC XTAL_SEL P_LOAD S_LOAD P/S S_DATA S_CLOCK M[0:6] N[1:0] PWR_DOWN S_CLOCK 2 6 ...

Page 3

MPC9239 900 MHz Low Voltage LVPECL Clock Synthesizer Table 1. Pin Configurations Pin I/O XTAL_IN, XTAL_OUT f Input REF_EXT Output OUT OUT TEST Output XTAL_SEL Input PWR_DOWN Input S_LOAD Input P_LOAD Input S_DATA Input S_CLOCK Input M[0:6] ...

Page 4

MPC9239 900 MHz Low Voltage LVPECL Clock Synthesizer Table 3. Function Table Input XTAL_SEL OE Outputs disabled. f PWR_DOWN Table 4. General Specifications Symbol Characteristics V Output Termination Voltage TT MM ESD Protection (Machine Model) HBM ESD Protection (Human Body ...

Page 5

MPC9239 900 MHz Low Voltage LVPECL Clock Synthesizer Table 6. DC Characteristics (V CC Symbol Characteristics LVCMOS Control Inputs (f , PWR_DOWN, XTAL_SEL, P_LOAD, S_LOAD, S_DATA, S_CLOCK, M[0:8], N[0:1]. OE) REF_EXT V Input High Voltage IH V Input Low Voltage ...

Page 6

MPC9239 900 MHz Low Voltage LVPECL Clock Synthesizer Table 8. MPC9239 Frequency Operating Range (in MHz) VCO frequency for a crystal interface frequency of M M[6:0] 10 MHz 20 0010100 21 0010101 22 0010110 23 0010111 24 0011000 25 0011001 ...

Page 7

MPC9239 900 MHz Low Voltage LVPECL Clock Synthesizer Programming the MPC9239 Programming the MPC9239 amounts to properly configuring the internal PLL dividers to produce the desired synthesized frequency at the output. The output frequency can be represented by this formula: ...

Page 8

MPC9239 900 MHz Low Voltage LVPECL Clock Synthesizer Table 10. Test and Debug Configuration for TEST T[2: 12-bit shift register out Logic 1 ÷ XTAL 0 ...

Page 9

MPC9239 900 MHz Low Voltage LVPECL Clock Synthesizer Layout Recommendations The MPC9239 provides sub-nanosecond output edge rates and thus a good power supply bypassing scheme is a must. Figure 6 shows a representative board layout for the MPC9239. There exists ...

Page 10

MPC9239 900 MHz Low Voltage LVPECL Clock Synthesizer -N- - 0.010 (0.250 NOTES: 1. DATUMS -L-, -M-, AND -N- DETERMINED WHERE TOP OF LEAD SHOULDER EXISTS PLASTIC BODY AT ...

Page 11

MPC9239 900 MHz Low Voltage LVPECL Clock Synthesizer IDT™ 900 MHz Low Voltage LVPECL Clock Synthesizer Advanced Clock Drivers Devices Freescale Timing Solutions Organization has been acquired by Integrated Device Technology, Inc Freescale Semiconductor PACKAGE DIMENSIONS CASE 873A-04 ISSUE C ...

Page 12

MPC9239 900 MHz Low Voltage LVPECL Clock Synthesizer MPC9239 IDT™ 900 MHz Low Voltage LVPECL Clock Synthesizer Freescale Timing Solutions Organization has been acquired by Integrated Device Technology, Inc 12 PACKAGE DIMENSIONS CASE 873A-04 ISSUE C 32-LEAD LQFP PACKAGE 12 ...

Page 13

Page 14

MPC92459 MPC9239 PART NUMBERS 900 MHz Low Voltage LVDS Clock Synthesizer 900 MHz Low Voltage LVPECL Clock Synthesizer INSERT PRODUCT NAME AND DOCUMENT TITLE Innovate with IDT and accelerate your future networks. Contact: www.IDT.com For Sales 800-345-7015 408-284-8200 Fax: 408-284-2775 ...

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