IMISG509XPB [ETC]

REDUCED EMI CLOCK CHIP CMOS LSI SPECTRUM SPREAD CLOCK GENERATOR; 降低EMI时钟芯片CMOS LSI扩频时钟发生器


型号：	IMISG509XPB
厂家：	ETC
描述：	REDUCED EMI CLOCK CHIP CMOS LSI SPECTRUM SPREAD CLOCK GENERATOR 降低EMI时钟芯片CMOS LSI扩频时钟发生器时钟发生器
文件：	总7页 (文件大小：91K)
中文：	中文翻译
下载：	下载PDF数据表文档文件

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IMISG509

REDUCED EMI CLOCK CHIP

April 1996

CMOS LSI

SPECTRUM SPREAD CLOCK GENERATOR

PRODUCT FEATURES

PRODUCT DESCRIPTION

Generates CPU clock signals for microprocessor

systems

The IMISG509 is a spectrum spread clock generator

specially designed for personal computers, laser

printers and other digital systems. IMISG509 uses a

patented concept to generate popular clock frequencies

that are intentionally broadbanded to reduce

electromagnetic interference. The radiated emissions,

associated with either the clock, harmonics or any

signals derived from the clock, nominally reduced by

10 dB and could significantly reduce the cost of

complying with the regulatory requirements.

Reduces measured EMI by 10 dB nominal

4V to 6V operating supply range

Supports CPUs from all major manufacturers.

Wide range of selectable output frequencies

including 60, 50, 48, 40, 33.3, 16.7

Single, low-cost crystal used as reference

frequency

PRCLK is the broadbanded output and can be

programmed by the PRCLK Frequency Selection Table

on Page 2. A single, low cost external crystal is

required as reference frequency for the synthesizer.

The output modulation function can be disabled when

the SSON pin is high.

Glitch-free switching

50% duty cycle

TTL or CMOS compatible outputs with 6 mA drive

capability

Low, short and long-term jitter

16 pin P-DIP and 16 Pin SOIC (300 mil body)

package options

CONNECTION DIAGRAM

VDD

OSCin

OSCout

VSS

MPSEL

AVDD

VDD

BLOCK DIAGRAM

MPCLK

VSS

PRCLK

AVSS

LF1

/4 OR /12

REF

44.2 MHz

MPCLK

SSON

MPSEL

SPECTRUM

SPREAD

PRCLK

CLOCK GEN

APPLICATIONS

SSON

IMISG509 eliminates the need for multiple oscillators

and generates the CPU clock signals for personal

computers, laser printers and other digital systems.

Supports CPUs from all major manufacturers.

INTERNATIONAL MICROCIRCUITS, INC. 525 LOS COCHES ST.

MILPITAS, CA 95035 TEL: 408-263-6300 FAX 408-263-6571

Page 1 of 7

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IMISG509

REDUCED EMI CLOCK CHIP

April 1996

CMOS LSI

SPECTRUM SPREAD CLOCK GENERATOR

PIN DESCRIPTION

OSCin, OSCout - These pins form an on-chip

reference oscillator when connected to terminals of an

external 44.2 MHz third overtone parallel resonant

crystal. OSCin may also serve as an input for an

externally generated CMOS level or AC coupled

reference signal.

PRCLK - Output from the spectrum spread clock

generator. Frequency selection is shown on Table 1.

When the SSON pin is high, outputs are not

modulated. When SSON is low, spectrum spread

function is enabled.

VSS - Circuit ground.

S0, S1, and S3 - Frequency select inputs. These inputs

control the PRCLK frequency selection. S0, S1, and S3

inputs control the CPU clock frequencies. All these

inputs have internal pull-downs.

VDD - Positive power supply.

AVSS - Analog circuit ground.

AVDD - Analog positive power supply.

MPCLK FREQUENCY SELECTION

Table

conditions.

shows the output frequency selection

INPUTS

OUTPUT

MPSEL

MPCLK

3.7 MHz

11.06 MHz

MPSEL - Controls MPCLK output frequency selections.

Table 2 shows the selected frequencies for MPCLK.

This input has an internal pull-up.

TABLE 2

SSON - This pin controls the spectrum spread function.

When low, PRCLK is modulated. When high, spreading

is turned off. This pin has an internal pull-up.

LF1 - This is the control output for the clock generator.

It is a single-ended, tri-state output. Component

connections are shown in Figure 1A when SSON is low

and in Figure 1B when SSON is high

330 pf

2200 pf

MPCLK - This is a non modulated output. This output

can be programmed to be 3.7 MHz or 11.06 MHz. The

selection of these frequencies are controlled by the

MPSEL pin shown in Table 2.

FIGURE 1A

PCLK FREQUENCY SELECTION

INPUTS

OUTPUT

MPCLK

N/A

16.7 MHz

33.3 MHz

40.0 MHz

48 MHz

50 MHz

60 MHz

22W

22 ufd

TABLE 1

FIGURE 1B

INTERNATIONAL MICROCIRCUITS, INC. 525 LOS COCHES ST.

MILPITAS, CA 95035 TEL: 408-263-6300 FAX 408-263-6571

Page 2 of 7

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IMISG509

REDUCED EMI CLOCK CHIP

April 1996

CMOS LSI

SPECTRUM SPREAD CLOCK GENERATOR

MAXIMUM RATINGS

This device contains circuitry to protect the inputs

against damage due to high static voltages or electric

field; however, precautions should be taken to avoid

application of any voltage higher than the maximum

rated voltages to this circuit. For proper operation, Vin

and Vout should be constrained to the range:

Voltage Relative to VSS

Voltage Relative to VDD

Storage Temperature:

Ambient Temperature:

Maximum supply voltage:

-0.3

0.3V

-65° to +150°C

-0°C to + 70°C

7.0V

VSS<(Vin or Vout)< VDD

Unused inputs must always be tied to an appropriate

logic voltage level (either VSS or VDD).

ELECTRICAL CHARACTERISTICS

Characteristic

Symbol

Min

Typ

Max

Units

Input Low Voltage

VIL

0.8

Vdc

Input High Voltage

VIH

2.0

Input Low Current with Pull-up/ Pull-down

IIH/IIL

10/100

Output Low Voltage IOL = 6mA

Output High Voltage IOH=6mA

VOL

VOH

0.4

Vdc

2.5

Tri-State Leakage Current

Static Supply Current

Dynamic Supply Current

Short Circuit Current

IOZ

IDD

ICC

ISC

250

VDD = 5V + 10%, TA = 0°C to +70°C

INTERNATIONAL MICROCIRCUITS, INC. 525 LOS COCHES ST.

MILPITAS, CA 95035 TEL: 408-263-6300 FAX 408-263-6571

Page 3 of 7

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IMISG509

REDUCED EMI CLOCK CHIP

April 1996

CMOS LSI

SPECTRUM SPREAD CLOCK GENERATOR

SWITCHING CHARACTERISTICS

Characteristic

Symbol

Min

Typ

Max

Units

Output Rise and Fall Time Measured at

10% - 90% of VDD

tTLH, tTHL

Output Rise and Fall Time Measured at

0.8V - 2.0V

tTLH, tTHL

Output Duty Cycles

TsymF1

Tj1s

45/55

Peak-to-Peak Jitter One Sigma

% of Fout

VDD = 5V + 10%, TA = 0°C to 70°C, CL = 15 pF

OSCILLATOR CHARACTERISTICS

Characteristic

Symbol

Min

Typ

Max

Units

millimho

Conditions

Transconductance

180

@ 44.2 MHz

Output Impedance

Input Capacitance

Output Capacitance

DC Bias Voltage

Start-up Time

200

800

ohms

@ 44.2 MHz

1.5 VDD/2

3.5

Volt

@ VDD = 4.5V

Duty Cycle

TsymF1

ICLKr

ICLKf

45/55

Input Rise Time OSCin

Input Fall Time OSCout

VCO CHARACTERISTICS

Characteristic

Symbol

Min

Typ

Max

Units

Conditions

VCO Gain

MHz/volt

DF/DV Measured with

VCO Control at 2V - 3V

Phase Detector Gain

100

145

200

INTERNATIONAL MICROCIRCUITS, INC. 525 LOS COCHES ST.

MILPITAS, CA 95035 TEL: 408-263-6300 FAX 408-263-6571

Page 4 of 7

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IMISG509

REDUCED EMI CLOCK CHIP

April 1996

CMOS LSI

SPECTRUM SPREAD CLOCK GENERATOR

EXTERNAL CONNECTIONS

VCC

DIGITAL GND PLANE

DVDD

1.5 uH

C11

10uF

ANALOG GND PLANE

AVDD

10 Ohms

C10

22uF

DVDD

SG509

10pF

XTAL

44.2 MHz

VDD

XIN

VDD

MPCLK

VSS

PRCLK

AVSS

LF1

DVDD

.1uF

JP5

.1uF

XOUT

VSS

MPSEL

AVDD

10pF

.033uF

1.2uH

HEADER

C7 10pF

SSON

.1uF

AVDD

330 pf

JP1

MPSEL

2200pF

S0 JP2

JP3

JP4

DVDD

NOTE: KEEP C3, C4, C5, C6 CLOSE TO THEIR PINS (4, 11, 13, 10, 9 RESPECTIVELY).

INTERNATIONAL MICROCIRCUITS, INC. 525 LOS COCHES ST.

MILPITAS, CA 95035 TEL: 408-263-6300 FAX 408-263-6571

Page 5 of 7

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IMISG509

REDUCED EMI CLOCK CHIP

April 1996

CMOS LSI

SPECTRUM SPREAD CLOCK GENERATOR

PACKAGE DRAWING AND DIMENSIONS

16 PIN SOIC OUTLINE DIMENSIONS

INCHES

MILLIMETERS

SYMBOL

MIN

NOM

MAX

MIN

NOM

MAX

0.097

0.0020

0.090

0.014

0.0091

.399

0.101

0.009

0.092

0.016

0.010

.407

0.104

0.0015

0.111

0.019

0.0125

.412

2.46

0.060

2.29

2.56

0.22

2.64

0.38

2.39

0.48

0.32

10.46

7.59

A₁

2.34

0.35

0.41

0.23

0.25

10.13

7.24

10.34

7.52

0.285

0.296

0.050 BSC

0.406

5°

0.299

1.27 BSC

10.31

5°

0.400

0°

0.410

10°

10.16

0°

10.41

10°

A₂

0.024

0.032

0.040

0.61

0.81

1.02

A₁

16-PIN PLASTIC DIP DIMENSIONS

SOIC package (300 mil)

INCHES

MILLIMETERS

SYMBOL

MIN

NOM

MAX

MIN

NOM

MAX

0.150

0.015

0.016

0.056

0.046

0.008

0.748

0.300

0.240

0.335

0.160

0.170

3.81

0.381

0.40

1.47

1.17

0.20

19.00

7.62

6.096

8.51

4.06

4.318

A₁

0.018

0.059

0.049

0.010

0.750

0.312

0.252

0.345

0.100 BSC

0.230

7°

0.020

0.062

0.052

0.012

0.752

0.325

0.260

0.355

0.45

1.52

1.24

0.25

19.05

7.924

6.49

8.76

2.54 BSC

3.30

7°

0.50

1.57

1.32

0.30

19.10

8.255

6.604

9.01

B₁

B₂

E₁

E₂

e₁

0.25

0°

0.135

15°

3.175

0°

3.429

15°

0.059

0.128

0.073

0.060

0.130

0.075

0.061

0.132

0.077

1.50

3.25

1.85

1.53

3.30

1.90

1.55

3.35

1.95

Q₁

Q₂

INTERNATIONAL MICROCIRCUITS, INC. 525 LOS COCHES ST.

MILPITAS, CA 95035 TEL: 408-263-6300 FAX 408-263-6571

Page 6 of 7

www.DataSheet4U.com

IMISG509

REDUCED EMI CLOCK CHIP

April 1996

CMOS LSI

SPECTRUM SPREAD CLOCK GENERATOR

ORDERING INFORMATION

Part Number

IMISG509xPB

IMISG509xXB

Package Type

Production Flow

16 Pin Plastic Dip

16 Pin SOIC

Commercial, 0°C to + 70°C

Note:

The “x” following the IMI Device Number denotes the device revision. The ordering part number is formed by

a combination of device number, device revision, package style, and screening as shown below.

Marking: Example:

IMI

SG509xPB

Date Code, Lot #

IMISG509xPB

Flow

B = Commercial, o°C to + 70°C

Package

P = Plastic Dip

X = Small Outline

Revision

IMI Device Number

INTERNATIONAL MICROCIRCUITS, INC. 525 LOS COCHES ST.

MILPITAS, CA 95035 TEL: 408-263-6300 FAX 408-263-6571

Page 7 of 7

IMISG509XPB [ETC]

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