Rev.1 Page 12
Read- Modify- Write Cycle
Refresh Cycle
Parameter Symbol
AD404M42V Unit Notes
-5 -6
Min Max Min Max
Read-modify- write cycle time t
RWC
108 - 133 - ns
RAS to WE delay time t
RWD
64 - 77 - ns 18
CAS to WE dealy time t
CWD
26 - 32 - ns 18
Column address to WE delay time t
AWD
39 - 47 - ns 18
OE hold time from WE t
OEH
8 - 10 - ns
Parameter Symbol
AD404M42V
Unit Notes
-5 -6
Min Max Min Max
CAS setup time (CBR refresh) t
CSR
5 - 5 - ns
CAS hold time (CBR refresh) t
CHR
8 - 10 - ns 10
RAS precharge to CAS hold time t
RPC
5 - 5 - ns 7
RAS pulse width (self refresh) t
RASS
100 - 100 -
RAS precharge time (self refresh) t
RPS
90 - 110 - ns
CAS hold time (CBR self refresh) t
CHS
-50 - -50 - ns
WE setup time t
WSR
0 - 0 - ns
WE hold time t
WHR
10 - 10 - ns
