EM47EM1688SBA-150 参数 Datasheet PDF下载

EM47EM1688SBA

AC and DC Logic Input Levels for Differential Signals

Differential signals definition

Differential AC and DC Input Levels

Symbol

V

IHdiff

V

ILdiff

V

IHdiff

(AC)

V

ILdiff

(AC)

Parameter

Differential input high

Differential input low

AC Differential input high

AC Differential input low

Min.

+0.2

See

Note3

2x(VIH(AC)-VREF)

See

Note3

Max.

See

Note3

-0.2

See

Note3

2x(VIL(AC)-VREF)

Units

V

V

V

V

Note

1

1

2

2

Note1.

It is used to define a differential signal slew-rate.

Note2.

F

or CK - /CK use VIH/VIL(AC) of address/command and VREFCA; for strobes (DQS, DQS) use VIH/VIL(AC) of

DQs and VREFDQ; if a reduced ac-high or ac-low level is used for a signal group, then the reduced level applies

also here.

Note3.

These values are not defined, however they single-ended signals CK, /CK, DQS, /DQS need to be

within the respective limits (VIH(DC) max, VIL(DC)min) for single-ended signals.

Mar. 2012

9/37

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