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HYB5116400BJ-50- Datasheet, PDF (9/26 Pages) Siemens Semiconductor Group – 4M x 4-Bit Dynamic RAM | |||
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HYB 5116400BJ/BT-50/-60/-70
4M x 4-DRAM
AC Characteristics (contâd) 5)6)
16F
TA = 0 to 70 °C,VCC = 5 V ± 10 %, tT = 5 ns
Parameter
Symbol
Limit Values
Unit Note
-50
-60
-70
min. max. min. max. min. max.
Fast Page Mode Read-Modify-Write Cycle
Fast page mode read-write cycle tPRWC 71 â
80 â
95 â
ns
time
CAS precharge to WE
tCPWD 48 â
55 â
65 â
ns
CAS-before-RAS Refresh Cycle
CAS setup time
tCSR
10 â
10 â
10 â
ns
CAS hold time
tCHR
10 â
10 â
10 â
ns
RAS to CAS precharge time
tRPC
5
â
5
â
5
â
ns
Write to RAS precharge time
tWRP
10 â
10 â
10 â
ns
Write hold time referenced to RAS tWRH 10 â
10 â
10 â
ns
CAS-before-RAS Counter Test Cycle
CAS precharge time
tCPT
35 â
40 â
40 â
ns
Test Mode
CAS hold time
Write command setup time
Write command hold time
tCHRT
30
â
30 â
30 â
ns
tWTS
10 â
10 â
10 â
ns
tWTH
10 â
10 â
10 â
ns
Self Refresh Cycle
RAS pulse width
RAS precharge time
CAS hold time
tRASS
tRPS
tCHS
100k â
95 â
-50 â
100k â
110 â
-50 â
100k â
130 â
-50 â
ns 17
ns 17
ns 17
Semiconductor Group
9
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