14

ICS9250-16

Group Skews (CPU = 66 MHz)

TA = 0 - 70º C; VDD = 3.3 V +/-5%, VDDL = 2.5 V +/-5%

CPU & IOAPIC load (lumped) = 20 pF; PCI, SDRAM, 3V66 load (lumped) = 30 pF

Refer to Group Offset Waveform diagram for definition of transition edges.

PARAMETER

SYMBOL

CONDITIONS

MIN

TYP

MAX

UNITS

CPU to SDRAM

Skew

1

Tsk1 CPU-SDRAM

-3

-2.6

-2

ns

Skew Window

1

Tw1 CPU-SDRAM

0

150

500

ps

CPU to 3V66

Skew

1

Tsk1 CPU-3V66

77.28

ns

Skew Window

1

Tw1 CPU-3V66

0

130

500

ps

SDRAM to 3V66

Skew

1

Tsk1 SDRAM-3V66

-500

100

500

ps

Skew Window

1

Tw1 SDRAM-3V66

0

155

500

ps

3V66 to PCI

Skew

1

Tsk1 3V66-PCI

1.5

2.4

3.5

ns

Skew Window

1

Tw1 3V66-PCI

0

275

500

ps

IOAPIC to PCI

Skew

1

Tsk1 IOAPIC-PCI

-1

-0.4

1

ns

Skew Window

1

Tw1 IOAPIC-PCI

00.25

1

ns

1Guaranteed by design, not 100% tested in production.

CPU @ 1.25 V, SDRAM @ 1.5 V

CPU @ 1.25 V, 3V66 @ 1.5 V

SDRAM, 3V66 @ 1.5 V

3V66, PCI @ 1.5 V

IOAPIC @ 1.25 V, PCI @ 1.5 V

Group Skews (CPU = 100 MHz)

TA = 0 - 70º C; VDD = 3.3 V +/-5%, VDDL = 2.5 V +/-5%

CPU & IOAPIC load (lumped) = 20 pF; PCI, SDRAM, 3V66 load (lumped) = 30 pF

Refer to Group Offset Waveform diagram for definition of transition edges.

PARAMETER

SYMBOL

CONDITIONS

MIN

TYP

MAX

UNITS

CPU to SDRAM

Skew

1

Tsk2 CPU-SDRAM

4.5

4.9

5.5

ns

Skew Window

1

Tw2 CPU-SDRAM

0

140

500

ps

CPU to 3V66

Skew

1

Tsk2 CPU-3V66

4.5

4.8

5.5

ns

Skew Window

1

Tw2 CPU-3V66

0

150

500

ps

SDRAM to 3V66

Skew

1

Tsk2 SDRAM-3V66

-500

100

500

ps

Skew Window

1

Tw2 SDRAM-3V66

0

155

500

ps

3V66 to PCI

Skew

1

Tsk2 3V66-PCI

1.5

2.4

3.5

ns

Skew Window

1

Tw2 3V66-PCI

0

275

500

ps

IOAPIC to PCI

Skew

1

Tsk2 IOAPIC-PCI

-1

-0.4

1

ns

Skew Window

1

Tw2 IOAPIC-PCI

00.25

1

ns

1Guaranteed by design, not 100% tested in production.

1Guaranteed by design, not 100% tested in production.

CPU @ 1.25 V, SDRAM @ 1.5 V

CPU @ 1.25 V, 3V66 @ 1.5 V

SDRAM, 3V66 @ 1.5 V

3V66, PCI @ 1.5 V

IOAPIC @ 1.25 V, PCI @ 1.5 V