HYB5117800BSJ-50- Datasheet, PDF (8/23 Pages) Siemens Semiconductor Group – 2M x 8 - Bit Dynamic RAM 2k Refresh

HYB 5(3)117800/BSJ-50/-60
2M × 8 DRAM
AC Characteristics (cont’d) ^{5, 6}
T_A = 0 to 70 °C, V_CC = 5 V ± 10 % / V_CC = 3.3 V ± 0.3 V, t_T = 5 ns
Parameter
Symbol
Limit Values
Unit Note
-50
-60
min. max. min. max.
Fast Page Mode Read-Modify-Write Cycle
Fast page mode read-write cycle time
CAS precharge to WE
t_PRWC
71
–
80 –
ns
t_CPWD
48
–
55 –
ns
CAS-before-RAS Refresh Cycle
CAS setup time
CAS hold time
RAS to CAS precharge time
Write to RAS precharge time
Write hold time referenced to RAS
t_CSR
10 –
10 –
ns
t_CHR
10 –
10 –
ns
t_RPC
5
–
5
–
ns
t_WRP
10 –
10 –
ns
t_WRH
10 –
10 –
ns
CAS-before-RAS Counter Test Cycle
CAS precharge time
t_CPT
35 –
40 –
ns
Test Mode
CAS hold time
Write command setup time
Write command hold time
RAS hold time in test mode
t_CHRT
30 –
30 –
ns
t_WTS
10 –
10 –
ns
t_WTH
10 –
10 –
ns
t_RAHT
30 –
30 –
ns
Semiconductor Group
8
1998-10-01