ICS9169C-40 [ICSI]

System Clock Chip; 系统时钟芯片


型号：	ICS9169C-40
厂家：	INTEGRATED CIRCUIT SOLUTION INC
描述：	System Clock Chip 系统时钟芯片时钟
文件：	总6页 (文件大小：331K)
中文：	中文翻译
下载：	下载PDF数据表文档文件

Integrated

Circuit

Systems, Inc.

ICS9169C-40

System Clock Chip

General Description

Features

8 selectable CPU clocks up to 75MHz

Six synchronous PCI clocks

The ICS9169C-40 is a Clock Synthesizer chip for Pentium or

Cyrix CPU based motherboards using PCI.

OneReferanceClockat14.318MHz

Power-up stabilization time = 2ms on all CPU and PCI

clocks, which meets Intel PentiumPro power-up

Low CPU and PCI clock jitter <500ps

Low skew output

Improved output drivers are designed for low EMI

Test Mode

Optional common or mixed supply mode:

Features include eight CPU clocks and six PCI clocks. A

Reference Output is available equal to the crystal frequency.

The device meets the Pentium power-up stabilization, which

requires that CPU and PCI clocks be stable within 2ms after

power-up.

The ICS9169C-40 clock output are designed for low EMI

emissions. Controlled rise and fall times, unique output

driver circuits and innovative circuit layout techniques enable

the ICS9169C-40 to have lower EMI than other clock

devices.

(VDD=VDDL1=VDDL2=3.3V)

(VDD=3.3V,VDDL1=VDDL2=2.5)

(VDD=3.3V,VDDL1=3.3V,VDDL2=2.5V)

Space saving and low cost 34-pin SSOP package

The ICS9169C-40 accepts a 14.318MHz reference crystal or

clock as its input and runs from a 3.3V supply.

Pin Configuration

Block Diagram

34-Pin SSOP

FS2

FS1

FS0

CPU

50MHz

55MHz

REF/2

PCI

33.3MHz

36.67MHz

REF/4

75MHz

50MHz

55MHz

60MHz

66.6MHz

37.5MHz

25MHz

Functionality

3.3V±10%,0-70^°C

27.6MHz

30MHz

Crystal (X1, X2) = 14.31818 MHz

33.3MHz

Pentium is a trademark on Intel Corporation.

9169C-40RevA072897P

ICS reserves the right to make changes in the device data identified in this

publication without further notice. ICS advises its customers to obtain the latest

version of all device data to verify that any information being relied upon by the

customer is current and accurate.

ICS169C-40

Pin Descriptions

PIN NUMBER

PIN NAME

VDD

TYPE

PWR

OUT

PWR

DESCRIPTION

1, 9

Power supply

REF

Buffered output reference. 3.3V

Digital Ground.

3, 5, 18, 26, 32

GND

N/C

Not connected.

6, 7, 8, 10, 11, 12

13, 19, 20

PCI (1:6)

FS (0:2)

OUT

Clock outputs - controlled by 3.3V V

Frequency select inputs, these inputs have internal pull-ups.

Input for tristate. If PD# = 0, then all outputs are tristated and

the device is in shutdown mode (VCO’s off, crystal oscillator

is off and all logic is reset) When PD# = 1, the device is in

normal operating mode. Has internal pull-up

PD#

AGND

N/C

PWR

Analog Ground

Not connected

AVDD

VDDL1

CPU (1:8)

VDDL2

PWR

OUT

PWR

OUT

Analog Power Supply

3.3/2.5V Power Supply for CPU (1:4)

Clock outputs.

22, 23, 24, 25, 27, 28, 29, 30

3.3/2.5V Power Supply for CPU (5:8)

Reference oscillator

ICS169C-40

Absolute Maximum Ratings

SupplyVoltage . . . . . . . . . . . . . . . . . . . . . . . . . . . 7.0V

Logic Inputs . . . . . . . . . . . . . . . . . . . . . . . . . . . . GND 0.5 V to V_DD+0.5 V

Ambient OperatingTemperature . . . . . . . . . . . . 0°C to +70°C

Storage Temperature . . . . . . . . . . . . . . . . . . . . . . 65°C to +150°C

Stresses above those listed under Absolute Maximum Ratings may cause permanent damage to the device. These ratings are

stress specifications only and functional operation of the device at these or any other conditions above those listed in the

operational sections of the specifications is not implied. Exposure to absolute maximum rating conditions for extended periods

may affect product reliability.

Electrical Characteristics at 3.3V

V_DD= 3.0 3.7V, T_A= 0 70°C unless otherwise stated

DC Characteristics

PARAMETER

Input Low Voltage

Input High Voltage

Input Low Current

Input High Current

Output Low Voltage

SYMBOL

TEST CONDITIONS

MIN

TYP

MAX

UNITS

0.2V

0.7V

VIN=0V

VIN=V

-50.0

-5.0

25.0

µA

5.0

0.4

IOL=12mA; for CPU, PCI

IOH=-12mA; for CPU, PCI

IOL=7.5mA; for Ref CLK

IOH=-15mA; for Ref CLK

0.3

2.8

0.3

2.8

Output High Voltage

2.4

Output Low Voltage

0.4

Output High Voltage

2.4

IOL=7.5mA: CPU only;

VDDL (1:2) = 2.5V

Output Low Voltage

0.3

0.4

IOH=-13mA; CPU only;

VDDL (1:2) = 2.5V

Output High Voltage

Supply Current

2.0

2.2

@66.6 MHz; all outputs unloaded

µA

PD#=0

All Logic Inputs to VDD

244

500

Power Down Current

(PD)

Other

371

700

µA

All Logic Inputs to GND

Note 1: Parameter is guaranteed by design and characterization. Not 100% tested in production.

ICS169C-40

Electrical Characteristics at 3.3V

V_DD= 3.0 3.7V, T_A= 0 70°C unless otherwise stated

AC Characteristics

SYMBOL TEST CONDITIONS

PARAMETER

MIN

TYP

0.9

0.8

1.5

1.4

MAX

1.4

1.2

2.0

UNITS

15pF load, 0.4 to 2.0V; VDD=VDDL

for All Outputs

15pF load, 2.0 to 0.4V; VDD=VDDL

for All Outputs

Rise Time

Tr1

Tf1

Fall Time

15pF load, 0.4 to 2.0V; VDDL=2.5V &

VDD = 2.3V; CPU

Rise Time

Tr2

15pF load, 2.0 to 0.4V; VDDL=2.5V &

VDD = 3.3V; CPU

Fall Time

Tf2

15pF load CPU, PCI, REF @

VOUT=1.5V

Duty Cycle

15pF load; VDDL (1:2)=2.5V

VTH=1.25V

Duty Cycle

CPU & PCI Clocks; Load=15pF,

VDD=VDDL

CPU & PCI Clocks; Load=15pF,

VDD=VDDL

Jitter, One Sigma

Tj1s1

Tjab1

Tj1s2

Tjab2

150

220

300

500

+400

350

250

400

16.0

Jitter, Absolute

-220

Jitter, One Sigma

Ref; Load=15pF

200

Jitter, Absolute

Ref Load=15pF

-500

-400

-350

-250

400

12.0

VDD=VDDL; @ 60MHz

VDD=VDDL; @ 66MHz

VDD=VDDL; @ 75MHz

Jitter, Cycle to Cycle

(for CPU only)

VDD=3.3V; VDDL=2.5;

for All Frequencies

Input Frequency

14.318

MHz

Logic Input Capacitance

Crystal Oscillator

CIN

CINX

ton

Logic input pins

X1, X2 pins

2.5

1.8

14.5

2.0

Capacitance

From VDD=1.6V to 1st crossing of 66.6

MHz VDD supply ramp < 40ms

From 1st crossing of acquisition to <

1% settling

Power-on Time

4.5

2.0

250

4.0

Frequency Settling Time

CPU to CPU & PCI to PCI; Load=15pF;

@1.5V

CPU to PCI; Load=15pF; @1.5V;

VDD=VDDL; CPU is early

CPU to PCI; Load=15pF; (CPU is early)

VDDL=2.5V, VTH=1.25V;

VDD=3.3V, VTH=1.5V

Clock Skew Window

Tsk1

Tsk2

-250

1.0

Clock Skew

Tsk3

0.50

1.5

3.0

Note 1: Parameter is guaranteed by design and characterization. Not 100% tested in production.

ICS169C-40

Technical Pin Function Descriptions

VDD/AVDD

FS0, FS1, FS2

This is the power supply to the internal logic of the device as

well as the following clock output buffers:

These pins control the frequency of the clocks at the CPU,

PCI pins. See the Funtionality table at the beginning of this

data sheet for a list of the specific frequencies, and the

selection codes that are necessary to produce these

frequencies. The device reads these pins at power-up. If a

"1" value is desired for a specific frequency selection bit,a

10K ohm restor must be connected from the apporapriate FS

pin to theVDD supply. If a "0" value is desired, then the 10K

resistor must be connected to ground.

PCI(1:6)

REF

This pin may be operated at any voltage between 3.0 and 5.5

volts. Clocks from the listed buffers that it supplies will

have a voltage swing from ground to this level. For the

actual guaranteed high and lowvoltage levels of these clocks,

please consult the AC parameter table in this data sheet.

REF

This is a fixed frequency clock that runs at the same frequency

as the input reference clock (typically 14.31818 MHz) is and

typically used to driveVideo and ISABUS requirements.

GND/AGND

This is the power supply ground return pin for the chip.

XIN

This pin serves one of two functions. When the device is

used with a crystal, XIN acts as the input pinfor the reference

signal that comes from the discrete crystal. When the device

is driven by an external clock signal, XIN is the device

input pin for that reference clock. This pin also implements

an internal crystal loading capacitor that is connected to

ground. See the data tables for the value of the capacitor.

VDDL(1:2)

This is the power supply to the CPU clock drivers. This pin

may be operated "at any voltage" between 2.5 and 3.3 volts.

Clocks from the buffers that it supplies will have a voltage

swing form ground to this level. For the actual guaranteed

high and low voltage levels of these clocks. Please consult

the AC parameter table in this data sheet.

XOUT

This pin is used only when the device uses a Crystal as the

reference frequency source. In this mode ofoperation, XOUT

is an output signal that drives (or excites) the discrete crystal.

This pin also implements aninternal crystal loading capacitor

that is connected to ground. See the data tables for the value

of the capacitor.

CPU(1:8)

These pins are the clock outputs that drive processor and

other CPU related circuitry that require clocks which are in

tight skew tolerance with the CPU clock. The voltage swing

of these clocks is controlled by that which is applied to the

VDDL (1:2) pin of the device. See the Functionality table at

the beginning of this data sheet for a list of the specific

frequencies that this clock operates at and the selection

codes that are necessary to produce these frequencies.

PCI(1:6)

Outputs for PCI bus with a skew≤ 250pS.A high current rate

of 60mAis available at 3.3V. These outputs are supplied from

VDD.

ICS169C-40

SSOPPackage

SYMBOL

COMMON DIMENSIONS

VARIATIONS

MIN.

.097

.005

.090

.014

.0091

NOM.

.101

.009

.092

.016

MAX.

.104

.0115

.094

.019

.0125

MIN.

.701

NOM. MAX.

.706 .711

.010

See Variations

.296

.292

.299

.040 BSC

.400

.010

.024

.406

.013

.032

.410

.016

.040

See Variations

5°

0°

8°

.085

.093

.100

Dimensions are in Inches

Ordering Information

ICS9169CF-40

Example:

ICS XXXX F - PPP

Pattern Number (2 or 3 digit number for parts with ROM code patterns)

PackageType

F=SSOP

Device Type (consists of 3 or 4 digit numbers)

Prefix

ICS, AV = Standard Device

ICS reserves the right to make changes in the device data identified in this

publication without further notice. ICS advises its customers to obtain the latest

version of all device data to verify that any information being relied upon by the

customer is current and accurate.

ICS9169C-40 [ICSI]

相关型号：

ICS9169C-41

ICS9169CF-23

ICS9169CF-231

ICS9169CF-231LF

ICS9169CF-232

ICS9169CF-232LF

ICS9169CF-26

ICS9169CF-26LF

ICS9169CF-36

ICS9169CF-36LF

ICS9169CF-36T

ICS9169CF-36T-LF