HYB514256B-50 SIEMENS [Siemens Semiconductor Group], HYB514256B-50 Datasheet - Page 14

• Manufacturer Part Number: HYB514256B-50
• Description: 256 K x 4-Bit Dynamic RAM Low Power 256 K x 4-Bit Dynamic RAM
• Manufacturer: SIEMENS [Siemens Semiconductor Group]

Read-Write (Read-Modify-Write) Cycle
Semiconductor Group
WE
OE
I/O1-I/O4
(Inputs)
I/O1-I/O4
(Outputs)
RAS
CAS
A0 - A8
V
V
V IL
V IL
V
V
V
V IL
V IL
V IL
V
V OL
IH
OH
V
IH
IH
IH
IH
V IL
IH
t
Address
ASR
Row
t
RAH
t
RAD
t
DZC
t
t
RCS
t
RCD
ASC
Address
Column
t
t
RAC
DZO
t
t
t
CAH
AA
CLZ
t
t
CAC
RWD
68
t
AWD
t
OEA
t
CSH
HYB 514256B/BL/BJ/BJL-50/-60/-70
t
t
RAS
CWD
t
RWC
Data
Out
t
CAS
t
t
OEZ
RSH
t
ODD
t
Data in
t
t
DS
Valid
CWL
OEH
t
t
t
DH
RWL
WP
256 K
“H” or “L”
t
t
ASR
t
CRP
RP
Address
Row
4-DRAM