V53C8256HT35 データシートの表示（PDF） - Mosel Vitelic, Corp

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V53C8256HT35

ULTRA-HIGH SPEED, 256K x 8 FAST PAGE MODE CMOS DYNAMIC RAM

Mosel Vitelic, Corp 

MOSEL VITELIC

Waveforms of CAS-before-RAS Refresh Counter Test Cycle

RAS

VIH

V IL

CAS

VIH

V IL

t CHR (49)

t CSR (47)

tRAS (1)

t CP(43)

tRSH (W)(25)

tCAS (5)

ADDRESS

VIH

V IL

READ CYCLE

WE

VIH

V IL

OE

VIH

V IL

I/O

VIH

V IL

WRITE CYCLE

WE

VIH

V IL

t RCS (7)

tWCS (27)

tROH (16)

t OAC (17)

t LZ (21)

t RWL (31)

tCWL (26)

t WCH (28)

DOUT

OE

VIH

V IL

I/O

VIH

V IL

tDS (32)

tDH (33)

D IN

V53C8256H

t RP (3)

t RRH (15)

t RCH (14)

t HZ (22)

t HZ (22)

8256H-14

Waveforms of CAS-before-RAS Refresh Cycle

RAS VIH

V IL

CAS VIH

V IL

I/O VOH

VOL

t RP (3)

t RPC (48)

t CP (43)

t HZ (22)

t CSR (47)

NOTE: WE, OE, A0–A7 = Don’t care

t RC (2)

t RAS (1)

t CHR (49)

t RP (3)

8256H-15

V53C8256H Rev. 1.2 July 1997

Don’t Care

Undefined

12

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