Integrated

Circuit

Systems, Inc.

ICS951601

Preliminary Product Preview

0663B—09/04/03

Block Diagram

General Purpose Frequency Timing Generator

Pin Configuration

48-pin SSOP

*120K ohm pull-up to VDD on indicated inputs.

Recommended Application:

General Purpose Clock Generator

Output Features:

•

17 - PCI clocks selectable,

either 33.33MHz or 66.6MHz @ 3.3V

•

1 - 48MHz @ 3.3V

•

1 - REF @ 3.3V, 14.318MHz.

Features:

•

Programable Spread spectrum precentage for EMI control

•

Uses external 14.318MHz crystal

•

Select pins for frequency select

Key Specifications:

•

PCI – PCI output skew within same bank @ 33MHz: <170ps

•

PCI – PCI output skew within same bank@ 66MHz: <340ps

•

Cycle to Cycle Jitter PCI @ 33MHz: <200ps

•

Cycle to Cycle Jitter PCI @ 66MHz: <200ps

•

Cycle to Cycle Jitter 48MHz: <350ps

•

Cycle to Cycle Jitter REF: <500ps

•

Slew Rate: 1.5 - 4 V/ns. (PCI spec.)

PLL2

PLL1

Spread

Spectrum

48MHz

PCI1A (7:0)

PCI2A (2:0)

PCI1B (2:0)

PCI2B (2:0)

8

3

3

3

X1

X2

XTAL

OSC

PCI

DIVDER

PCI

DIVDER

PCI

DIVDER

PCI

DIVDER

SDATA

SCLK

SELA (2:1)

SELB (2:1)

SPREAD

Control

Logic

Config.

Reg.

REF0

Power Groups:

VDDA = Analog Power

GNDA = Analog Ground

PRODUCT PREVIEW documents contain information on new products in the sampling or preproduction phase of development. Characteristic data and other specifications are subject to

change without notice.

REF0

VDD

X1

X2

GND

SDATA

SCLK

GNDA

VDDA

SEL1A

PCI1A_0

PCI1A_1

VDD33

GND

PCI1A_2

PCI1A_3

GND

VDD33

PCI1A_4

PCI1A_5

VDD33

GND

PCI1A_6

PCI1A_7

48MHz

GND

VDD48

SPREAD

VDDA

GNDA

SEL2B

PCI2B_2

PCI2B_1

GND

VDD66

PCI2B_0

SEL2A

PCI2A_2

PCI2A_1

VDD2A

GND

PCI2A_0

SEL1B

PCI1B_2

PCI1B_1

GND

VDD1B

PCI1B_0

1

2

3

4

5

6

7

8

9

10

11

12

13

14

15

16

17

18

19

20

21

22

23

24

48

47

46

45

44

43

42

41

40

39

38

37

36

35

34

33

32

31

30

29

28

27

26

25