13

ICS9250-23

0391B—09/18/03

Electrical Characteristics - SDRAM

TA = 0 - 70°C; VDD = 3.3 V +/-5%, VDDL = 2.5 V +/-5%; CL =30 pF

PARAMETER

SYMBOL

CONDITIONS

MIN

TYP

MAX

UNITS

Output High Voltage

VOH1

IOH = -1 mA

2.4

3.28

V

Output Low Voltage

VOL1

IOL = 1 mA

0.03

0.4

V

VOH@MIN = 2 V

-85

-54

VOH@MAX = 3.135V

-46

-12

VOL@MIN = 1 V

54

63

VOL@MAX =0.4V

27

53

Rise Time

1

tr1

VOL = 0.4 V, VOH = 2.4 V

0.4

1.25

1.6

ns

Fall Time

1

tf1

VOH = 2.4 V, VOL = 0.4 V

0.4

1.53

1.6

ns

Duty Cycle

1

dt1

VT = 1.5 V

45

53.2

55

%

Skew

tsk1

VT = 1.5 V

267

380

ps

Jitter

1

, Cycle-to-Cycle

tjcyc-cyc1

VT = 1.5 V

176

250

ps

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

mA

mA

Output High Current

IOH1

Output Low Current

IOL1

(No Skew Window is needed for Group Skew spec.)

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

24MHz, 48MHz, REF, CPU & IOAPIC load = 20 pF; PCI, SDRAM & 3V66 load = 30 pF.

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

Group Skews (CPU = 66 MHz; SDRAM = 100MHz)

PARAMETER

SYMBOL

CONDITIONS

MIN

TYP

MAX UNITS

CPU to SDRAM

Skew

1

Tsk1 CPU-SDRAM

CPU @ 1.25 V, SDRAM @ 1.5 V

2.0

3.0

ns

CPU to 3V66

Skew

1

Tsk1 CPU-3V66

CPU @ 1.25 V, 3V66 @ 1.5 V

7

8

ns

SDRAM to 3V66

Skew

1

Tsk1 SDRAM-3V66

SDRAM @1.5V, 3V66 @ 1.5 V

-500

394

500

ps

3V66 to PCI

Skew

1

Tsk1 3V66-PCI

3V66 @1.5V, PCI @ 1.5 V

1.5

2.58

3.5

ns

Group Skews (CPU = 100 MHz; SDRAM = 100MHz)

PARAMETER

SYMBOL

CONDITIONS

MIN

TYP

MAX UNITS

CPU to SDRAM

Skew

1

Tsk1 CPU-SDRAM

CPU @ 1.25 V, SDRAM @ 1.5 V

4.5

5.5

ns

CPU to 3V66

Skew

1

Tsk1 CPU-3V66

CPU @ 1.25 V, 3V66 @ 1.5 V

4.5

4.63

5.5

ns

SDRAM to 3V66

Skew

1

Tsk1 SDRAM-3V66

SDRAM @1.5V, 3V66 @ 1.5 V

-500

396

500

ps

3V66 to PCI

Skew

1

Tsk1 3V66-PCI

3V66 @1.5V, PCI @ 1.5 V

1.5

2.58

3.5

ns

Group Skews (CPU = 133 MHz; SDRAM = 100MHz)

PARAMETER

SYMBOL

CONDITIONS

MIN

TYP

MAX UNITS

CPU to SDRAM

Skew

1

Tsk1 CPU-SDRAM

CPU @ 1.25 V, SDRAM @ 1.5 V

-500

-322

500

ps

CPU to 3V66

Skew

1

Tsk1 CPU-3V66

CPU @ 1.25 V, 3V66 @ 1.5 V

-500

-284

500

ps

SDRAM to 3V66

Skew

1

Tsk1 SDRAM-3V66

SDRAM @1.5V, 3V66 @ 1.5 V

-500

389

500

ps

3V66 to PCI

Skew

1

Tsk1 3V66-PCI

3V66 @1.5V, PCI @ 1.5 V

1.5

2.61

3.5

ns