Switching Characteristics
V = 5V ± 5% (+5 Volt Option), V = 3.3V ± 0.3V (+3.3 Volt Option), C = 50pf, T = 0 to 70°C (Commercial), -40 to 85°C (Industrial)
CC
CC
L
A
-12
-15
Symbol
Description
Units
Min
Max
Min
Max
(1)
t
t
t
t
t
t
t
t
t
t
t
Column Address Access Time
12
15
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
AC
Column Address Valid to /CAL Inactive (Write Cycle)
Column Address Change to Output Data Invalid
Column Address Setup Time
12
5
15
5
ACH
AQX
ASC
ASR
C
5
5
Row Address Setup Time
5
5
55
65
25
6
Row Enable Cycle Time
Row Enable Cycle Time, Cache Hit (Row=LRR), Read Cycle Only
Column Address Latch Active Time
20
5
C1
CAE
CAH
CH
Column Address Hold Time
0
0
5
5
Column Address Latch High Time (Latch Transparent)
/CAL Inactive Lead Time to /RE Inactive (Write Cycles Only)
-2
-2
CHR
t
t
t
t
t
t
t
t
t
0
0
Column Address Latch High to Write Enable Low (Multiple Writes)
Column Address Latch High to Data Valid
Column Address Latch Inactive to Data Invalid
Column Address Latch Setup Time to Row Enable
/WE Low to /CAL Inactive
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
CHW
CQV
CQX
CRP
CWL
DH
15
17
5
5
5
0
1
5
5
5
5
5
0
Data Input Hold Time
1.5
Mask Hold Time From Row Enable (Write-Per-Bit)
Mask Setup Time to Row Enable (Write-Per-Bit)
Data Input Setup Time
DMH
DMS
DS
5
5
(1)
GQV
t
Output Enable Access Time
5
5
5
5
5
5
(2,3)
GQX
t
t
t
t
t
t
t
t
t
Output Enable to Output Drive Time
0
0
0
0
ns
ns
(4,5)
GQZ
Output Turn-Off Delay From Output Disabled (/G↑)
/F and W/R Mode Select Hold Time
0
0
ns
ns
ns
ns
ns
MH
5
/F and W/R Mode Select Setup Time
5
MSU
NRH
NRS
PC
/CAL, /G, W/R, and /WE Hold Time For /RE-Only Refresh
/CAL, /G, W/R, and /WE Setup Time For /RE-Only Refresh
Column Address Latch Cycle Time
0
0
5
5
12
15
(1)
RAC
Row Enable Access Time, On a Cache Miss
30
15
35
17
ns
ns
(1)
Row Enable Access Time, On a Cache Hit (Limit Becomes t
Row Enable Access Time for a Cache Write Hit
Row Address Hold Time
)
RAC1
AC
(1,6)
t
t
t
30
35
ns
ns
ns
RAC2
RAH
RE
1
1.5
35
Row Enable Active Time
100000
30
100000
1-24
RAMTRON [ RAMTRON INTERNATIONAL CORPORATION ]
