±
10%, V
SS
= 0V unless otherwise noted
AC Test conditions, input pulse levels 0 to 3V
# Symbol Parameter
40 45 50 60
Unit NotesMin. Max. Min. Max. Min. Max. Min. Max.
1t
RAS
RAS
Pulse Width 40 75K 45 75K 50 75K 60 75K ns
2t
RC
Read or Write Cycle Time 75 80 90 110 ns
3t
RP
RAS Precharge Time 25 25 30 40 ns
4t
CSH
CAS Hold Time 40 45 50 60 ns
5t
CAS
CAS Pulse Width 12 13 14 15 ns
6t
RCD
RAS to CAS Delay 17 28 18 32 19 36 20 43 ns
7t
RCS
Read Command Setup Time 0000ns4
8t
ASR
Row Address Setup Time 0000ns
9t
RAH
Row Address Hold Time 7 8 9 10 ns
10 t
ASC
Column Address Setup Time 0000ns
11 t
CAH
Column Address Hold Time 5 6 7 10 ns
12 t
RSH (R)
RAS Hold Time (Read Cycle) 12 13 14 15 ns
13 t
CRP
CAS to RAS Precharge Time 5555ns
14 t
RCH
Read Command Hold Time
Referenced to CAS
0000ns5
15 t
RRH
Read Command Hold Time
Referenced to RAS
0000ns5
16 t
ROH
RAS Hold Time Referenced to OE 8 9 10 10 ns
17 t
OAC
Access Time from OE 12 13 14 17 ns
18 t
CAC
Access Time from CAS 12 13 14 17 ns 6, 7
19 t
RAC
Access Time from RAS 40 45 50 60 ns 6, 8, 9
20 t
CAA
Access Time from Column Address 20 22 24 30 ns 6, 7, 10
21 t
LZ
CAS to Low-Z Output 0000ns16
22 t
HZ
Output buffer turn-off delay time 060708010ns16
23 t
AR
Column Address Hold Time
from RAS
30 35 40 45 ns
24 t
RAD
RAS to Column Address 12 20 13 23 14 26 15 30 ns 11
Delay Time
25 t
RSH (W)
RAS or CAS Hold Time in Write
Cycle
12 13 14 15 ns
26 t
CWL
Write Command to CAS Lead Time 12 13 14 15 ns
27 t
WCS
Write Command Setup Time 0000ns12, 13
28 t
WCH
Write Command Hold Time 5 6 7 10 ns
29 t
WP
Write Pulse Width 5 6 7 10 ns