ICS8431-21 datasheet, PDF - EEWORLD Datasheet

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ICS8431-21: Description350 MHz, OTHER CLOCK GENERATOR, PDSO28; Categorysemiconductor The embedded processor and controller; File Size214KB，17 Pages; ManufacturerICS ( IDT ); Websitehttp://www.icst.com

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ICS8431-21 Overview

350 MHz, OTHER CLOCK GENERATOR, PDSO28

ICS8431-21 Parametric

Parameter Name	Attribute value
Number of terminals	28
Minimum operating temperature	0.0 Cel
Maximum operating temperature	85 Cel
Processing package description	7.50 X 18.05 MM, 2.25 MM HEIGHT, LEAD FREE, MS-013, MO-119, SOIC-28
EU RoHS regulations	Yes
state	Transferred
microprocessor_microcontroller_peripheral_ic_type	CLOCK GENERATOR, OTHER
jesd_30_code	R-PDSO-G28
jesd_609_code	e3
moisture_sensitivity_level	NOT SPECIFIED
utput_clock_frequency_max	350 MHz
Packaging Materials	PLASTIC/EPOXY
ckage_code	SOP
ckage_equivalence_code	SOP28,.4
packaging shape	RECTANGULAR
Package Size	SMALL OUTLINE
eak_reflow_temperature__cel_	260
wer_supplies	3.3
imary_clock_crystal_frequency_nom	25 MHz
qualification_status	COMMERCIAL
seated_height_max	2.65 mm
sub_category	Clock Generators
Maximum supply voltage	155 mA
Rated supply voltage	3.3 V
Minimum supply voltage	3.14 V
Maximum supply voltage	3.46 V
surface mount	YES
Craftsmanship	CMOS
Temperature level	OTHER
terminal coating	MATTE TIN
Terminal form	GULL WING
Terminal spacing	1.27 mm
Terminal location	DUAL
ime_peak_reflow_temperature_max__s_	NOT SPECIFIED
length	18.05 mm
width	7.5 mm

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Integrated

Circuit

Systems, Inc.

ICS8431-21

350MH

, L

ITTER

, C

RYSTAL

SCILLATOR

-3.3V LVPECL F

REQUENCY

YNTHESIZER

EATURES

•

Fully integrated PLL

•

Differential 3.3V LVPECL output

•

Crystal oscillator interface

•

Output frequency range: 62.5MHz to 350MHz

•

Crystal input frequency range: 14MHz to 25MHz

•

VCO range: 250MHz to 700MHz

•

Programmable PLL loop divider for generating a variety

of output frequencies

•

Spread Spectrum Clocking (SSC) fixed at 1/2% modulation

for environments requiring ultra low EMI

•

PLL bypass modes supporting in-circuit testing and on-chip

functional block characterization

•

Cycle-to-cycle jitter: 30ps (maximum)

•

3.3V supply voltage

•

0°C to 85°C ambient operating temperature

•

Replaces ICS8431-01 and ICS8431-11

•

Lead-Free package fully RoHS compliant

ENERAL

ESCRIPTION

The ICS8431-21 is a general purpose clock fre-

quency synthesizer for IA64/32 application and a

HiPerClockS™

member of the HiPerClockS™ family of High Per-

formance Clock Solutions from ICS. The VCO op-

erates at a frequency range of 250MHz to 700MHz

providing an output frequency range of 62.5MHz to 350MHz.

The output frequency can be programmed using the parallel in-

terface, M0 through M8 to the configuration logic, and the output

divider control pin, DIV_SEL. Spread spectrum clocking is pro-

grammed via the control inputs SSC_CTL0 and SSC_CTL1.

ICS

Programmable features of the ICS8431-21 support four op-

erational modes. The four modes are spread spectrum clock-

ing (SSC), non-spread spectrum clock and two test modes

which are controlled by the SSC_CTL[1:0] pins. Unlike other

synthesizers, the ICS8431-21 can immediately change

spread-spectrum operation without having to reset the device.

In SSC mode, the output clock is modulated in order to achieve

a reduction in EMI. In one of the PLL bypass test modes, the

PLL is disconnected as the source to the differential output

allowing an external source to be connected to the TEST_I/O

pin. This is useful for in-circuit testing and allows the differen-

tial output to be driven at a lower frequency throughout the

system clock tree. In the other PLL bypass mode, the oscilla-

tor divider is used as the source to both the M and the Fout

divide by 2. This is useful for characterizing the oscillator and

internal dividers.

LOCK

IAGRAM

XTAL_IN

OSC

XTAL_OUT

SSIGNMENT

SSC_CTL0

SSC_CTL1

TEST_I/O

nP_LOAD

XTAL_IN

XTAL_OUT

CCA

DIV_SEL

CCO

FOUT

nFOUT

PLL

PHASE

DETECTOR

÷2

VCO

÷4

FOUT

nFOUT

ICS8431-21

TEST_I/O

Configuration

Logic

SSC

Control

Logic

M0:M8

28-Lead SOIC

7.5mm x 18.05mm x 2.25mm package body

M Package

Top View

nP_LOAD

SSC_CTL0

SSC_CTL1

DIV_SEL

8431AM-21

www.icst.com/products/hiperclocks.html

REV. A APRIL 27, 2005

ICS8431-21 Related Products

	ICS8431-21	ICS8431AM-21	ICS8431AM-21LF	ICS8431AM-21LFT	ICS8431AM-21T
Description	350 MHz, OTHER CLOCK GENERATOR, PDSO28	350 MHz, OTHER CLOCK GENERATOR, PDSO28	350 MHz, OTHER CLOCK GENERATOR, PDSO28	350 MHz, OTHER CLOCK GENERATOR, PDSO28	350 MHz, OTHER CLOCK GENERATOR, PDSO28
Number of terminals	28	28	28	28	28
Minimum operating temperature	0.0 Cel	0.0 Cel	0.0 Cel	0.0 Cel	0.0 Cel
Maximum operating temperature	85 Cel	85 Cel	85 Cel	85 Cel	85 Cel
Processing package description	7.50 X 18.05 MM, 2.25 MM HEIGHT, LEAD FREE, MS-013, MO-119, SOIC-28	7.50 X 18.05 MM, 2.25 MM HEIGHT, LEAD FREE, MS-013, MO-119, SOIC-28	7.50 X 18.05 MM, 2.25 MM HEIGHT, LEAD FREE, MS-013, MO-119, SOIC-28	7.50 X 18.05 MM, 2.25 MM HEIGHT, LEAD FREE, MS-013, MO-119, SOIC-28	7.50 X 18.05 MM, 2.25 MM HEIGHT, LEAD FREE, MS-013, MO-119, SOIC-28
EU RoHS regulations	Yes	Yes	Yes	Yes	Yes
state	Transferred	Transferred	Transferred	Transferred	Transferred
microprocessor_microcontroller_peripheral_ic_type	CLOCK GENERATOR, OTHER	CLOCK GENERATOR, OTHER	CLOCK GENERATOR, OTHER	CLOCK GENERATOR, OTHER	CLOCK GENERATOR, OTHER
jesd_30_code	R-PDSO-G28	R-PDSO-G28	R-PDSO-G28	R-PDSO-G28	R-PDSO-G28
jesd_609_code	e3	e3	e3	e3	e3
moisture_sensitivity_level	NOT SPECIFIED	NOT SPECIFIED	NOT SPECIFIED	NOT SPECIFIED	NOT SPECIFIED
utput_clock_frequency_max	350 MHz	350 MHz	350 MHz	350 MHz	350 MHz
Packaging Materials	PLASTIC/EPOXY	PLASTIC/EPOXY	PLASTIC/EPOXY	PLASTIC/EPOXY	PLASTIC/EPOXY
ckage_code	SOP	SOP	SOP	SOP	SOP
ckage_equivalence_code	SOP28,.4	SOP28,.4	SOP28,.4	SOP28,.4	SOP28,.4
packaging shape	RECTANGULAR	RECTANGULAR	RECTANGULAR	RECTANGULAR	RECTANGULAR
Package Size	SMALL OUTLINE	SMALL OUTLINE	SMALL OUTLINE	SMALL OUTLINE	SMALL OUTLINE
eak_reflow_temperature__cel_	260	260	260	260	260
wer_supplies	3.3	3.3	3.3	3.3	3.3
imary_clock_crystal_frequency_nom	25 MHz	25 MHz	25 MHz	25 MHz	25 MHz
qualification_status	COMMERCIAL	COMMERCIAL	COMMERCIAL	COMMERCIAL	COMMERCIAL
seated_height_max	2.65 mm	2.65 mm	2.65 mm	2.65 mm	2.65 mm
sub_category	Clock Generators	Clock Generators	Clock Generators	Clock Generators	Clock Generators
Rated supply voltage	3.3 V	3.3 V	3.3 V	3.3 V	3.3 V
Minimum supply voltage	3.14 V	3.14 V	3.14 V	3.14 V	3.14 V
surface mount	YES	YES	YES	YES	YES
Craftsmanship	CMOS	CMOS	CMOS	CMOS	CMOS
Temperature level	OTHER	OTHER	OTHER	OTHER	OTHER
terminal coating	MATTE TIN	MATTE TIN	MATTE TIN	MATTE TIN	MATTE TIN
Terminal form	GULL WING	GULL WING	GULL WING	GULL WING	GULL WING
Terminal spacing	1.27 mm	1.27 mm	1.27 mm	1.27 mm	1.27 mm
Terminal location	DUAL	DUAL	DUAL	DUAL	DUAL
ime_peak_reflow_temperature_max__s_	NOT SPECIFIED	NOT SPECIFIED	NOT SPECIFIED	NOT SPECIFIED	NOT SPECIFIED
length	18.05 mm	18.05 mm	18.05 mm	18.05 mm	18.05 mm
width	7.5 mm	7.5 mm	7.5 mm	7.5 mm	7.5 mm
Maximum supply voltage	3.46 V	3.46 V	3.46 V	3.46 V	3.46 V

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