12

Integrated

Circuit

Systems, Inc.

ICS950602

0469B—12/18/02

Electrical Characteristics - SDRAM

TA = 0 - 70°C; VDD=3.3V +/-5%; CL = 10-30 pF (unless otherwise specified)

PARAMETER

SYMBOL

CONDITIONS

MIN

TYP

MAX

UNITS

Output Impedance

1

RDSP5

Vo=VDD*(0.5)

10

24

Ω

Output Impedance

1

RDSN5

Vo=VDD*(0.5)

10

24

Ω

Output High Voltage

VOH5

IOH = -1 mA

2.4

V

Output Low Voltage

VOL5

IOL = 1 mA

0.4

V

VOH@MIN = 2 V

-46

VOH@MAX = 3.135V

-54

VOL@MIN = 1 V

54

VOL@MAX =0.4V

53

Rise Time

tr5

1

VOL = 0.4 V, VOH = 2.4 V

0.4

1.1

1.6

ns

Fall Time

tf5

1

VOH = 2.4 V, VOL = 0.4 V

0.4

0.75

1.6

ns

Duty Cycle

dt5

1

VT = 1.5 V

45

50

55

%

Skew

tsk5

1

VT = 1.5 V

30

250

ps

Propagation delay

SDRAM_IN to

SDRAM

tpdel5

1

VT = 1.5 V

2.95

4

ns

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

Output High Current

IOH5

mA

Output Low Current

IOL5

mA

Electrical Characteristics - REF

TA = 0 - 70°C; VDD=3.3V +/-5%; CL = 10-20 pF (unless otherwise specified)

PARAMETER

SYMBOL

CONDITIONS

MIN

TYP

MAX

UNITS

Output Frequency

FO4

1

14.318

MHz

Output Impedance

RDSP4

1

VO = VDD*(0.5)

20

60

Ω

Output High Voltage

VOH4

1

IOH = -1 mA

2.4

V

Output Low Voltage

VOL4

1

IOL = 1 mA

0.4

V

Output High Current

IOH4

1

V OH@MIN = 1.0 V, V OH@MAX = 3.135 V

-29

-23

mA

Output Low Current

IOL4

1

VOL @MIN = 1.95 V, VOL @MAX = 0.4 V

29

27

mA

Rise Time

tr4

1

VOL = 0.4 V, VOH = 2.4 V

1

1.85

4

ns

Fall Time

tf4

1

VOH = 2.4 V, VOL = 0.4 V

1

1.95

4

ns

Duty Cycle

dt1

1

VT = 1.5 V

45

55.7

56

%

Jitter, cycle-to-cycle

tjcyc-cyc4

1

VT = 1.5 V

365

550

ps

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