Recommended External Circuit

VDDX---~~r-~

NOTES:

Peripheral Clocks

I. The external components shown should be placed as close to the device as possible.

0.1#

16MHz 12MHz 24 MHz

2. Pins 5 and IS should be connected together externally. One decoupling capacitor may suffice for both pins.

3. May be part of system decoupling.

C·Sl

ICS9133X II

Absolute Maximum Ratings

VDD referenced to GND ... 7V

Operating temperature under bias ... O°C to + 70°C Storage temperature ... -40°C to150°C

Voltage on 110 pins referenced to GND ... GND -O.5V to VDD +0.5V Power dissipation ... 0.5 Watts

Stresses above those listed under Absolute Maximum Ratings may cause permanent damage to the device. This is a stress rating only and functional operation of the device at these or any other conditions above those indicated 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

V IDD=+ . to 3 0 3 7V T .A= O°C to 70°C un ess ot erWlse state h d

DC Characteristics

PARAMETER SYMBOL TEST CONDITIONS MIN TYP MAX UNITS

Input Low Voltage VIL - - 0.2VDD V

Input High Voltage VIH 0.7VDD ^- - V

Input Low Current IIL VIN=OV (Pull-up)

-

- 12 IlA

Input High Current IIH VIN=VDD

-

- 2* j.tA

Output Low Voltage VOL IOL=4mA - - 0.1 V

Output High Voltage VOH IOH=-lmA VDD-.IV - - V

Output High Current VOH IOH=-4mA - - - V

Output High Current VOH IOH=-8rnA 2.4 - - V

Output Frequency Change FD With respect to typical

-

.005 0.05 %

over Supply and frequencyl

Temperature

Short circuit current Isc Each output clock

-

15 - rnA

Supply Current Icc No load, 40 MHz

-

10 - rnA

Pull-up resistor value Rpu

-

620 - kQ

AC Characteristics

Input Clock Rise Time tICr - ^- 5 Its

Input Clock Fall Time tIcf - - 5 IlS

Output Rise time, 0.8 to 2.0V tr 15 pfload - 1.5 2 ns

Rise time, 20% to 80% VDD tf 15 pfload

-

2.5 4 ns

Output Fall time, 2.0 to 0.8V tf 15 pfload - 1.5 2 ns

Fall time, 80% to 20% VDD

tr

15 pf load

-

^{2.5 4 ns}

Duty cycle dt 15 pfload 43/57 48/52 57143 %

Duty cycle, reference clocks dt 15 pfload, Note I 40/60 43/57 60/40 %

Jitter, one sigma As compared with - I 3 %

Jitter, absolute _tab clock period. - 2 5 %

Input Frequency fi 25 32.768 40 kHz

Clock skew between any Tsk - 100 500 ps

Clock #2 outputs

Power-up time tpu From off to 40 MHz - 1,000 - ms

NOTE I: 32 kHz output duty cycle is dependent on crystal used.

II ^ICS9133X

Electrical Characteristics

VDD - +5V+1O% TA-O°C to 70°C unless otherwise stated

-

-DC Characteristics

PARAMETER SYMBOL TEST CONDITIONS MIN TYP MAX UNITS

Input Low Voltage VIL ^{- -} 0.2VDD V

Input High Voltage VIH 0.7VDD - - V

Input Low Current IlL VIN=OV (Pull-up) ^{- -} 15 IlA

E

Input High Current IIH VIN=VDD - - 2* IlA

Output Low Voltage VOL IOL=4mA - - 0.1 V

Output High Voltage VOH IOH=-lmA VDD-.IV - - V

Output High Voltage VOH IOH=-4rnA - - - V

Output High Voltage VOH IOH=-8rnA 2.4 ^-

-

V

Output Frequency Change over FD With respect to typical

-

.005 0.05 %

Supply and Temperature frequency

Short circuit current Isc Each output clock ^- 33 - rnA

Supply Current Icc No load, 40 MHz

-

17

-

^rnA

Pull-up resistor value Rpu Note 1 - 380 - ill

AC Charac:teristics

Input Clock Rise Time tlCr ^{- -} 5 IlS

Input Clock Fall Time tICf - - 5 Ils

Output Rise time, 0.8 to 2.0V

tr

15 pfload - 1 1.5 ns

Rise time, 20% to 80% VDD tr 15 pfload - 2 3 ns

Output Fall time, 2.0 to 0.8V tf 15 pfload - 1 1.5 ns

Fall time, 80% to 20% VDD If 15 pfload

-

2 3 ns

Duty cycle dt 15 pfload 43/57 48/52 57/43 %

Duty cycle, reference clocks dt 15 pfioad, Note I 40/60 43/57 60/40 %

Jitter, one sigma tjIs As compared with clock

-

I 3 %

Jitter, absolute tab period

-

2 5 %

Input Frequency fi 25 32.768 40 kHz

Clock skew between any Tsk ^- 100 500 ps

Clock #2 outputs

Power-up time tou From off to 40 MHz - 10 - ms

NOTE 1: 32 kHz output duty cycle is dependent on crystal used.

C-53

ICS9133X

32 kHz Supply Current

14 12 10

J.LA8

6 4 2

o

Ordering Information

o

^{1 2 3 4}

Vdd

ICS9133XN20 (DIP)

or

ICS9133XM20 (SOIC)

Example:

ICSXXXX M

L~_

N=DIP (I'lastic) M=SOIC

" - - - Device Type (consists of 3 or 4 digit numbers) ' - - - Prefix

ICS=Standard Device

5

c..

^-2SpF

c..

^{= lSpF}

c..

^=OpF

6

Integrated 32 kHz Motherboard Frequency Generator

General Description

The ICS9134-06 and ICS9134-07 are designed to generate clocks for all 286, 386, 486, Pentium and RISC-based mother-boards, including laptops and notebook computers. The only external components required are a 32.768 kHz crystal and decoupling capacitors. The device generates the 14.318 MHz system clock, eliminating the need for a 14.318 MHz crystal.

High performance applications may require high speed clock termination components. The chip includes three independent clock generators plus the 32.768 kHz reference clock to pro-duce all necessary frequencies, including real time clockIDRAM refresh, master clock, CPU clock, keyboard clock, floppy disk controller clock, serial communications clock and bus clocks. Different frequencies from clocks #2 can be selected using the frequency select pins, but clock #1 will be at 14.318 MHz for all standard versions.

VDD32 Supply

The ICS9134-06 and ICS9134-07 have a separate power supply for the 32.768 kHz oscillator circuitry. This allows the 32 kHz clock to run from a battery or other source while the main power to the chip is disconnected. The VDD32 supply is guaranteed to operate down to +2.0V, with the clock consuming less than

IOfJA

at +3.3V with the main VDD at

Ov.

The frequencies and power-down options in the ICS9134-06 and ICS9134-07 are mask programmable. Customer specific masks can be made and prototypes delivered within 6-8 weeks from receipt of order. Integrated Circuit Systems also offers standard versions, such as that described in this data sheet.

Block Diagram

VDD32

Features

•

^{IDD <10 IlA} when 32 kHz is running

•

Single 32.768 kHz crystal generates all PC motherboard clocks

•

3 independent clock generators

•

Generates CPU clocks from 4.0 to 80 MHz

•

Up to 5 output clocks

•

Separate VDD for 32 kHz clock

•

Power-down options available

•

Operates from 3.3V or 5.0V supply

•

Operates up to 66 MHz at 3.3V

•

Supports OPTi 8OC463/5 and FirTM chipsets

•

16-pin, 300 mil, SOIC package

Applications

Notebook/Palmtop Computers: The ICS9134-06 and ICS9134-07 work with +3.3V and +5V and a single 32.768 kHz crystal, making it the ideal solution for generating clocks in portables with minimum board space. The user can save power by using this single part instead of oscillators or other frequency generators. The ICS9134-06 and ICS9134-07 fur-ther reduce the current consumption by having the ability to completely shutdown the individual clocks when not in use, while still maintaining the separately powered 32.768 kHz clock.

32.788 kHz

crystal CLOCK CLOCK

GENERATOR 1-"""4 ... GENERATOR

1--+

^CPUCLK

32.768 kHz 1 2

14.318 MHz

CLOCK

'--... GENERATOR PERIPHERAL

3 CLOCKS

IICS9134-06RevB092794 Fir IS a trademark of Plcopower Corporation

C-ss

E

ICS9134-06

Decoding Table for CPU Clock

CPUS2 CPUSI CPUSO CPUCLK (MHz)

PD24+KDB*

ICS9134 Option

KBOUT

Select 2 for 2XCPU and CPU frequencies. See Table above.

Crystal connection. Connect to 32.768 kHz crystal.

Crystal connection. Connect to 32.768 kHz crystal.

Separate power supply connection for 32.768 kHz clock. Will operate to 2.0y'

Connect to +3.3V or +5Y.

Connect to ground.

24 MHz floppy (or super 110) clock output.

32.768 kHz square wave clock output.

Keyboard clock output, fixed 16 MHz (-06) or 12 MHz (-07).

Power-down 24M+keyboard. Shuts off both clock outputs, pins 7 & 9 when low.

14.318 MHz system clock output.

Connect to ground.

Connect to +3.3V or +5V.

CPUCLK output. See Table above.

Select 0 for 2XCPU and CPU frequencies. See Table above.

Select I for 2XCPU and CPU frequencies. See Table above.

Im Dokument les Product Data Book (Seite 190-195)