HYB514256B Datasheet, PDF (17/22 Pages) Siemens Semiconductor Group – 256 K x 4-Bit Dynamic RAM Low Power 256 K x 4-Bit Dynamic RAM

HYB 514256B/BL/BJ/BJL-50/-60/-70
256 K × 4-DRAM
V
IH
RAS
VIL
V
IH
CAS
VIL
tRASP
tRCD
tPC
tCAS
tCP
tCAS
A0-A8
WE
tRAH
tASR
V
IH
Row
VIL
Addr
tRAD
V
IH
tCAH
tASC
Column
Address
tCWL
tWCS
tWCH
tWP
VIL
tASC ^tCAH
Column
Address
tCWL
tWCS
tWCH
tWP
tRP
tRSH
tCAS
tCRP
tRAL
tCAH
tASC
Column
Address
tCWL
tR_tWWLCS
tWCH
tWP
tASR
Row
Address
V
IH
OE
VIL
V
I/O1-I/O4 ^IH
(Inputs) _VIL
V
I/O1-I/O4 ^OH
(Outputs) _VOL
tDH
tDS
Valid
Data In
“H” or “L”
Fast Page Mode Early Write Cycle
Semiconductor Group
tDH
tDS
Valid
Data In
tDH
tDS
Valid
Data In
HI-Z
71