FM1808 Ramtron Corporation, FM1808 Datasheet - Page 8

• Manufacturer Part Number: FM1808
• Description: Density = 256Kbit ;; Interface = Parallel ;; Speed = 70ns ;; VDD = 5V
• Manufacturer: Ramtron Corporation

Read Cycle AC Parameters
Write Cycle AC Parameters (T
Notes
1
2
3
Power Cycle Timing
Rev. 2.3
May 2003
Symbol
t
t
t
t
t
t
t
t
t
Symbol
t
t
t
t
t
t
t
t
t
t
t
t
t
t
t
t
CE
CA
RC
PC
AS
AH
OE
HZ
OHZ
CA
CW
WC
PC
AS
AH
WP
DS
DH
WZ
WX
HZ
WS
WH
PU
PD
Symbol
This parameter is periodically sampled and not 100% tested.
The relationship between /CE and /WE determines if a /CE- or /WE-controlled write occurs. There is no timing specification
associated with this relationship.
The minimum address setup time is 0 ns when the device is operating above 0 C.
Parameter
Chip Enable Active Time
Chip Enable to Write High
Write Cycle Time
Precharge Time
Address Setup Time
Address Hold Time
Write Enable Pulse Width
Data Setup
Data Hold
Write Enable Low to Output High Z
Write Enable High to Output Driven
Chip Enable to Output High-Z
Write Enable Setup
Write Enable Hold
V
Last Access Complete to V
Parameter
Chip Enable Access Time (to data valid)
Chip Enable Active Time
Read Cycle Time
Precharge Time
Address Setup Time
Address Hold Time
Output Enable Access Time
Chip Enable to Output High-Z
Output Enable to Output High-Z
DD
(min) to First Access Start
(T
A
= -40 C to + 85 C, V
Parameter
(T
A
A
= -40 C to + 85 C, V
= -40 C to + 85 C, V
DD
(min)
DD
= 4.5V to 5.5V unless otherwise specified)
DD
= 4.5V to 5.5V unless otherwise specified)
DD
= 4.5V to 5.5V unless otherwise specified)
Min
1
0
Max
-
-
Min
Min
130
130
70
60
10
70
70
60
10
40
30
10
4
4
5
0
0
-70
-70
Units
2,000
2,000
S
S
Max
Max
70
10
15
15
15
15
Notes
Units
Units
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
Page 8 of 12
FM1808
Notes
Notes
3
1
1
3
1
1
1
2
2