184pin Unbuffered DDR SDRAM MODULE

Rev. 0.3 May. 2002

M368L3223CTL

8. I/O Setup/Hold Plateau Derating

This derating table is used to increase tDS/tDH in the case where the input level is flat below VREF

± 310mV for a duration of

up to 2ns.

9. I/O Delta Rise/Fall Rate(1/slew-rate) Derating

is calated as 1/SlewRate1-1/SlewRate2. For example, if slew rate 1 = 5V/ns and slew rate 2 =.4V/ns then the Delta Rise/Fall

Rate =-0/5ns/V. Input S/H slew rate based on larger of AC-AC delta rise/fall rate and DC-DC delta rise/fall rate.

10. This parameter is fir system simulation purpose. It is guranteed by design.

11. For each of the terms, if not already an integer, round to the next highest integer. tCK is actual to the system clock cyc le time.

I/O Input Level

∆tDS

∆tDH

(mV)

(ps)

(ps)

± 280

+50

+50

Delta Rise/Fall Rate

∆tDS

∆tDH

(ns/V)

(ps)

(ps)

0

0

0

±0.25

+50

+50

±0.5

+100

+100

The following table specifies derating values for the specifications listed if the single-ended clock skew rate is less than 1.0V/ns.

CK slew rate

(Single ended)

∆tIH/tIS

(ps)

∆tDSS/tDSH

(ps)

∆tAC/tDQSCK

(ps)

∆tLZ(min)

(ps)

∆tHZ(max)

(ps)

1.0V/ns

0

0

0

0

0

0.75V/ns

+50

+50

+50

-50

+50

0.5V/ns

+100

+100

+100

-100

+100

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