HYM724000GS-50- Datasheet, PDF (9/11 Pages) Siemens Semiconductor Group – 4M x 72-Bit Dynamic RAM Module

HYM724000/10GS-50/-60
4M x 72 ECC- Module
AC Characteristics (cont’d)(note: 5,6,7,8)
T_A = 0 to 70 °C,V_CC = 5.0 ± 10 %
Parameter
Symbol
-50
min. max.
-60
min. max.
Unit Note
Fast Page Mode Read-Modify-Write Cycle
Fast page mode read-write cycle time t_PRWC
73
–
CAS precharge to WE
t_CPWD
50
–
82 –
57 –
ns 11
ns 11,21
CAS-before-RAS Refresh Cycle
CAS setup time
t_CSR
7
–
CAS hold time
t_CHR
8
–
RAS to CAS precharge time
t_RPC
5
–
Write to RAS precharge time
t_WRP
12 –
Write hold time referenced to RAS
t_WRH
8
–
7
–
8
–
5
–
12 –
8
–
ns 11
ns 10
ns
ns 11
ns 10
Presence Detect Read Cycle
PDE to valid presence detect data
PDE inactive to presence detects
inactive
t_PD
–
t_PDOFF
0
10 –
10 0
10 ns
10 ns
Semiconductor Group
9