IDT70V35S20G 데이터 시트보기 (PDF) - Integrated Device Technology

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IDT70V35S20G

HIGH-SPEED 3.3V STATIC RAM

Integrated Device Technology 

IDT70V35/34S/L (IDT70V25/24S/L)

High-Speed 3.3V 8/4K x 18 (8/4K x 16) Dual-Port Static RAM

Industrial and Commercial Temperature Ranges

Timing Waveform of Semaphore Read after Write Timing, Either Side(1)

tOH

tSAA

A0-A2

SEM

I/O0

R/W

VALID ADDRESS

tAW

tWR

tEW

tDW

DATAIN

VALID

tAS

tWP

tDH

VALID ADDRESS

tACE

tSOP

DATAOUT

VALID(2)

tSWRD

tAOE

OE

Write Cycle

Read Cycle

NOTES:

1. CE = VIH or UB & LB = VIH for the duration of the above timing (both write and read cycle).

2. “DATAOUT VALID” represents all I/O's (I/O0-I/O17 for IDT70V35/34) and (I/O0-I/O15 for IDT70V25/24) equal to the semaphore value.

5624 drw 11

Timing Waveform of Semaphore Write Contention(1,3,4)

A0"A"-A2"A"

MATCH

SIDE(2) "A"

R/W"A"

SEM"A"

A0"B"-A2"B"

SIDE(2) "B"

R/W"B"

tSPS

MATCH

SEM"B"

5624 drw 12 ,

NOTES:

1. DOR = DOL = VIL, CER = CEL = VIH, or both UB & LB = VIH.

2. All timing is the same for left and right port. Port “A” may be either left or right port. Port “B” is the opposite from port “A”.

3. This parameter is measured from R/W"A" or SEM"A" going HIGH to R/W"B" or SEM"B" going HIGH.

4. If tSPS is not satisfied, there is no guarantee which side will obtain the semaphore flag.

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