MK1493-03BGILFTR datasheet(2/19 Pages) IDT

Part #	MK1493-03BGILFTR

Description	PCI CLOCK GENERATOR

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Manufacturer	IDT [Integrated Device Technology]

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MK1493-03B

PCI CLOCK GENERATOR

CLOCK SYNTHESIZER

IDT™ PCI CLOCK GENERATOR

2

MK1493-03B

REV H 051310

Pin Assignment

48-pin TSSOP

Table 1. Frequency Select

1) Each PCI clock is individually selectable.

Table 2. Input Select (FS8, FS9,FS10&FS11)

2) The changes in frequency are step changes.

3) Default Value upon Power up.

Pin Descriptions

21

CLK50M

22

FS6_B

23

FS5_B

24

FS4_B

1

FS3_A

2

FS2_A

3

FS1_A

4

FS0_A

5

GND

6

VDD

7

SCL

8

SDA

9

GND

10

X1 / ICLK

11

X2

12

VDD

13

REF25

14

VDD

15

GND

16

GND

17

VDD

18

CPUCLK

19

CPUCLK

20

FS7_B

28

27

26

25

48

47

46

45

44

43

42

41

40

39

38

37

36

35

34

33

32

31

30

29

PCICLK2/FS10

PCICLK1/FS9

PCICLK0

PCICLK3

FS4_A

FS5_A

FS6_A

FS7_A

FS0_B

FS1_B

PCICLK7

GND

VDD

PCICLK6

PCICLK5

PCICLK4

FS2_B

VDD

GND

CLK66M/FS8

FS3_B

VDD

GND

CLK66/71/83

FS(0:7)_B

FS(0:7)_A

PCICLK(0:7)* 1 2

00

25 MHz

01

33.3333 MHz

10

50 MHz

11

66.6666 MHz

FS8 (pin 32)

CPUCLK/CPUCLK 2

0

125MHz

1

100MHz3

FS9

(pin 27)

FS10

(pin 28)

CLK66M/71M/83M 2

(pin 33)

00

83.33 MHz3

01

71.42 MHz

10

66.66 MHz

11

OFF

Number

Name

Type

Pin Description

1

FS3_A

Input

Freq select input pin for PCI CLK3 per table 1. Internal pull-up resistor 120K.

2

FS2_A

Input

Freq select input pin for PCI CLK2 per table 1. Internal pull-up resistor 120K.

3

FS1_A

Input

Freq select input pin for PCI CLK1 per table 1. Internal pull-up resistor 120K.

4

FS0_A

Input

Freq select input pin for PCI CLK0 per table 1. Internal pull-up resistor 120K.

5

GND

Power

Connect to ground.

6

VDD

Power

Connect to +3.3 V.

7

SCL

Input

Clock pin for SMBus circuitry, 5 V tolerant.

8

SDA

Input

Data pin for SMBus circuitry, 5 V tolerant.

9

GND

Power

Connect to ground.

10

X1/ICLK

Input

Crystal connection/input clock. Connect to a 25 MHz fundamental mode crystal or clock input.

11

X2

XO

Connect to a 25 MHz fundamental mode crystal or leave open for clock input.

12

VDD

Power

Connect to +3.3 V.

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