Switching Characteristics
CC
V = 5V ± 5% (+5 Volt Option), Vcc = 3.3V ± 0.3V (+3.3 Volt Option), C = 50pf, T = 0 to 70°C (Commercial), -40 to 85°C (Industrial)
L
A
-12
-15
Symbol
Description
Units
Min
Max
Min
Max
(1)
t
Column Address Access Time
12
15
ns
ns
ns
ns
ns
ns
ns
AC
t
t
Column Address Valid to /CAL Inactive (Write Cycle)
Column Address
12
12
5
15
15
5
ACH
ACI
t
t
t
t
t
t
t
t
t
Column Address Change to Output Data Invalid
AQX
ASC
ASR
C
Column Address Setup Time
5
5
5
5
Row Address Setup Time
55
65
25
6
Row Enable Cycle Time
Row Enable Cycle Time, Cache Hit (Row=LRR), Read Cycle Only
Column Address Latch Active Time
ns
ns
ns
ns
ns
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
0
0
Column Address Latch High to Write Enable Low (Multiple Writes)
Column Address Latch High to Data Valid
ns
ns
CHW
CLV
7
7
t
Column Address Latch Low to Data Invalid
0
5
ns
CQH
t
t
t
t
t
t
t
t
Column Address Latch High to Data Invalid
Column Address Latch Setup Time to Row Enable
/WE Low to /CAL Inactive
15
15
ns
ns
ns
ns
ns
ns
ns
ns
CQV
CRP
CWL
DH
5
5
0
1
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
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
/F and W/R Mode Select Setup Time
5
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
2-104
RAMTRON [ RAMTRON INTERNATIONAL CORPORATION ]
