CY7C0241AV-25AI 데이터 시트보기 (PDF) - Cypress Semiconductor

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CY7C0241AV-25AI

3.3V 4K/8K/16K x 16/18 Dual-Port Static RAM

Cypress Semiconductor 

PRELIMINARY

Switching Waveforms

Read Cycle No.1 (Either Port Address Access)[23, 24, 25]

tRC

ADDRESS

DATA OUT

tAA

tOHA

PREVIOUS DATA VALID

Read Cycle No.2 (Either Port CE/OE Access)[23, 26, 27]

CE and

LB or UB

OE

DATA OUT

ICC

CURRENT

ISB

tACE

tDOE

tLZOE

tLZCE

tPU

Read Cycle No. 3 (Either Port)[23, 25, 26, 27]

tRC

ADDRESS

tAA

UB or LB

CE

DATA OUT

tLZCE

tABE

tACE

tLZCE

CY7C024AV/025AV/026AV

CY7C0241AV/0251AV/036AV

DATA VALID

tOHA

tHZCE

tHZOE

DATA VALID

tPD

tOHA

tHZCE

tHZCE

Notes:

23. R/W is HIGH for read cycles.

24. Device is continuously selected CE = VIL and UB or LB = VIL. This waveform cannot be used for semaphore reads.

25. OE = VIL.

26. Address valid prior to or coincident with CE transition LOW.

27. To access RAM, CE = VIL, UB or LB = VIL, SEM = VIH. To access semaphore, CE = VIH, SEM = VIL.

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