CY28378OCT datasheet(4/22 Pages) CYPRESS

Part #	CY28378OCT

Description	FTG for Pentium 4 and Intel 845 Series Chipset

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Manufacturer	CYPRESS [Cypress Semiconductor]

Direct Link	http://www.cypress.com

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CY28378

Document #: 38-07519 Rev. **

Page 4 of 22

Table 2. Frequency Selection Table

Input Conditions

Output Frequency

VCO

Freq.

PLL Gear

Constants

(G)

FS4

FS3

FS2

FS1

FS0

CPU

3V66

PCI

SEL4

SEL3

SEL2

SEL1

SEL0

0

100.7

67.1

33.6

402.80

47.99750

0

1

100.9

67.3

33.6

403.60

47.99750

0

1

0

108.0

72.0

36.0

432.00

47.99750

0

1

101.2

67.5

33.7

404.80

47.99750

0

1

0

114.0

76.0

38.0

456.00

47.99750

0

1

0

1

117.0

78.0

39.0

468.00

47.99750

0

1

0

120.0

80.0

40.0

480.00

47.99750

0

1

123.0

82.0

41.0

492.00

47.99750

0

1

0

125.7

62.9

31.4

377.12

63.99667

0

1

0

1

130.3

65.1

32.6

390.80

63.99667

0

1

0

1

0

133.9

67.0

33.5

401.70

63.99667

0

1

0

1

134.2

67.1

33.6

402.60

63.99667

0

1

0

134.5

67.3

33.6

403.50

63.99667

0

1

0

1

148.0

74.0

37.0

444.00

63.99667

0

1

0

152.0

76.0

38.0

456.00

63.99667

0

1

156.0

78.0

39.0

468.00

63.99667

1

0

160.0

80.0

40.0

480.00

63.99667

1

0

1

164.0

82.0

41.0

492.00

63.99667

1

0

1

0

167.4

66.9

33.5

334.80

95.99500

1

0

1

170.0

68.0

34.0

340.00

95.99500

1

0

1

0

175.0

70.0

35.0

350.00

95.99500

1

0

1

0

1

180.0

72.0

36.0

360.00

95.99500

1

0

1

0

185.0

74.0

37.0

370.00

95.99500

1

0

1

190.0

76.0

38.0

380.00

95.99500

1

0

166.8

66.7

33.4

333.60

95.99500

1

0

1

100.2

66.8

33.4

400.80

47.99750

1

0

1

0

133.6

66.8

33.4

400.80

63.99667

1

0

1

200.4

66.8

33.4

400.80

95.99500

1

0

166.6

66.6

33.3

333.33

95.99500

1

0

1

100.0

66.6

33.3

400.00

47.99750

1

0

200.0

66.6

33.3

400.00

95.99500

1

133.3

66.6

33.3

400.00

63.99667

Swing Select Functions

MULTSEL1

MULTSEL0

Board Target

Trace/Term Z

Reference R, IREF =

VDD/(3*Rr)

Output

Current

VOH @ Z

00

50

Ω

Rr = 221 1%,

IREF = 5.00 mA

IOH = 4*Iref

1.0V @ 50

10

50

Ω

Rr = 475 1%,

IREF = 2.32 mA

IOH = 6*Iref

0.7V @ 50

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