ICST AV9148F-13, ICS9148F-13 Datasheet

Integrated
Circuit
Systems, Inc.

General Description Features

ICS9148-13

Block Diagram

Pentium is a trademark of Intel Corporation

Frequency Generator & Integrated Buffers for PENTIUM

TM

9148-13 Rev A 020398

Pin Configuration

The ICS9148-13 generates all clocks required for high speed
RISC or CISC microprocessor systems such as Intel Pentium
and PentiumPro. An output enable is provided for testability.

Spread Spectrum is available to modulate the CPU and BUS
PLL (leaving the REF, 24, 48 MHz operating normally). The
SS_EN# pin enables the spreading when low. The SS_TYPE
pin choses ±0.5% (nominally) center spread or +0, -2%
(nominally) downspread modulation.

High drive BUS outputs typically provide greater than 1 V/ns
slew rate into 30 pF loads. CPU outputs typically provide
better than 1V/ns slew rate into 20pF loads while maintaining

50 ±

5% duty cycle. The REF clock outputs typically provide

better than 0.8/ns slew rates.

 Generates twelve processor, six bus, two

14.31818 MHz, 24MHz and one 48MHz clock for
USB support.

 Synchronous clocks skew matched to 250ps window

on CPUs and 500ps window on BUSs

• CPU to BUS skew, 3.0 to 5.0ns (CPU Early)

 3.0V - 3.7V supply range
 48-pin SSOP package

48-Pin SSOP

Functionality

2SF1SF0SF

ni)21:1(UPC

zHM

ni)6:1(SUB

zHM

000 575.73
001 0013.33
010 570.03
011 3.3856.14

100 0552
101 0603
110 76.6633.33
111 555.72

EOFER

42

)zHM(

84

)zHM(

UPCSUBOCVCSO

1snuRsnuRsnuRsnuRsnuRsnuRsnuR

0

-irT
etats

-irT
etats

-irT
etats

-irT
etats

-irT
etats

snuRsnuR

Output Enable

30K pullup resistor to VDD on OE, FS(0:2), SS_EN#, SS_TYPE

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.

2

ICS9148-13

Pin Descriptions

Spread Spectrum Functionality

91niPtupnI

#NE_SS

02niPtupnI

EPYT_SS

MARDS,UPC

SKCOLCICPdna

CIPAOI,FERzHM42zHM84

0

0

nidetaludomycneuqerF

edommurtcepsdaerps

)yllanimon(%5.0-,%5.0+

zHM813.41zHM42zHM84

1

nidetaludomycneuqerF

edommurtcepsdaerps

)yllanimon(%0.2-,%0+

zHM813.41zHM42zHM84

1X

ycneuqerfydaetS,lamroN

edom

zHM813.41zHM42zHM84

REBMUNNIPEMANNIPEPYTNOITPIRCSED

2,12FER,1FERTUO.stuptuokcolcecnereferzHM813.41

,01,3,42,81

44,34,53,03

DNGRWPdnuorGeciveD

41XNI.tupnikcolclanretxerolatsyrC
52XTUO)detcennocnuevaelkcolcecnereferlanretxerof(.tuptuolatsyrC
6DDVRWPV3.3tlov.ylppusrewopO/I

72,62,7)2:0(SFNIsrotsiserpullupsaH.elbattsilnoitcnufeeS.stupnitcelesycneuqerF

71,61,41,31,21,11)6:1(SUBTUO.stuptuokcolcSUB

91#NE_SSNI.elbane=woL.elbanEmurtcepSdaerpS
02EPYT_SSNI

.daerpsnwodmurtcepSdaerpS=hgiH

.daerpsretnecmurtcepSdaerpS=woL

,23,13,82,12,51

84,64,04

DDVRWPV3.3.ylppusrewoperoC

22zHM42TUOtuptuokcolczHM42
32zHM84TUO.tuptuokcolczHM84

52C/NtcennocoN

92EONI

UPC,skcolCdexiF,skcolCsuBllawoLsilangissihtnehwelbanEtuptuO

)pudellupyllanretni(edometatsirtnidecalpstuptuoskcolC

,83,73,63,43,33

,8,74,54,24,14,93

9

)21:1(UPCTUO

ycneuqerfrofelbatytilanoitcnufeesstuptuoskcolcUPC

snoitacificeps

VDD Pins: 48, REFs, XT AL OSC
VDD Pins: 6, CPU 1- 2
VDD Pins: 15, BUS 1-6
VDD Pins: 24, 48, Fix PLL

VDD Pins: 28, CPU PLL CORE
VDD Pins: 32, CPU 3-6
VDD Pins: 40, CPU 7-10
VDD Pins: 46, CPU 11-12

3

ICS9148-13

Absolute Maximum Ratings

Supply Voltage. . . . . . . . . . . . . . . . . . . . . . . . . . . 7.0 V

Logic Inputs. . . . . . . . . . . . . . . . . . . . . . . . . . . . . GND –0.5 V to VDD +0.5 V

Ambient Operating Temperature . . . . . . . . . . . . 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 - Input/Supply/Common Output Parameters

TA = 0 - 70C; Supply V oltage VDD = 3.3 V +/-5% ( unless other wi se state d)

PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS

Input High Vol ta ge V

IH

2V

DD

+0.3 V

In put Low Vol ta ge V

IL

VSS-0.3 0.8 V

Input High Curr en t I

IH1

VIN = V

DD;

SS_Type o nly 6 8.0 200

µ

A

I

IH2

VIN = V

DD;

Al l outputs Except SS_Type -5 0.2 5

µ

A

Input Low Current I

IL1

VIN = 0 V;with pull-down resistors SS_Type only

-5 0.2 5

µ

A

I

IL2

VIN = 0 V;with pull-up resistors except SS_Type

-200 -100

µ

A

Supply Current I

DD

CL = 0 pF; Select @ 66M 67 180 mA

Input freque nc y F

i

VDD = 3.3 V; 14.318 MHz

Input Capac itance

1

C

IN

Logi c Inputs 5 pF

C

INX

X1 & X2 pins 27 36 45 pF

Transition Time

1

T

trans

To 1st crossi ng of target Freq. 1 .5 3 ms

Clk Stabilization

1

T

STAB

From VDD = 3.3 V to 1% target Freq. 3 ms

Skew

1

T

CPU-BUSVT

= 1.5 V;

3.0 4.0 5.0 ns

1

Guarente ed by design, not 1 00 % tested i n production.