參數(shù)資料
型號: FM25W256-G
廠商: Electronic Theatre Controls, Inc.
英文描述: 256Kb FRAM Wide Voltage Serial Memory
中文描述: 寬電壓的256Kb串行FRAM的記憶
文件頁數(shù): 10/13頁
文件大小: 165K
代理商: FM25W256-G
AC Parameters
(T
A
= -40
°
C to + 85
°
C, C
L
= 30pF)
Symbol
Parameter
f
CK
SCK Clock Frequency
t
CH
Clock High Time
t
CL
Clock Low Time
t
CSU
Chip Select Setup
t
CSH
Chip Select Hold
t
OD
Output Disable Time
t
ODV
Output Data Valid Time
t
OH
Output Hold Time
t
D
Deselect Time
t
R
Data In Rise Time
t
F
Data In Fall Time
t
SU
Data Setup Time
t
H
Data Hold Time
t
HS
/Hold Setup Time
t
HH
/Hold Hold Time
t
HZ
/Hold Low to Hi-Z
t
LZ
/Hold High to Data Active
Notes
1.
t
CH
+ t
CL
= 1/f
CK
.
2.
This parameter is characterized but not 100% tested.
3.
Rise and fall times measured between 10% and 90% of waveform.
Power Cycle Timing
(T
A
= -40
°
C to + 85
°
C, V
DD
= 2.7V to 5.5V)
Symbol
t
PU
Power Up (V
DD
min) to First Access (/CS low)
t
VR
V
DD
Rise Time
t
VF
V
DD
Fall Time
Capacitance
(T
A
= 25
°
C, f=1.0 MHz, V
DD
= 3.3V)
Symbol
C
O
Output capacitance (SO)
C
I
Input capacitance
Notes
1.
This parameter is characterized and not 100% tested.
2.
Slope measured at any point on V
DD
waveform.
Data Retention
(V
DD
= 2.7V to 5.5V)
Parameter
Data Retention
AC Test Conditions
Input Pulse Levels
Input rise and fall times
Input and output timing levels
FM25W256
Rev. 1.0
Aug. 2004
Page 10 of 13
V
DD
2.7 to 3.3V
Min
0
22
22
10
10
0
60
5
5
10
10
V
DD
3.3 to 5.5V
Min
0
18
18
10
10
0
60
5
5
10
10
Max
20
20
22
50
50
20
20
Max
25
15
15
50
50
20
15
Units
MHz
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
Notes
1
1
2
1,3
1,3
2
2
Parameter
Min
10
50
100
Max
-
-
Units
ms
μ
s/V
μ
s/V
Notes
1,2
1,2
Parameter
Min
-
-
Max
8
6
Units
pF
pF
Notes
1
1
Min
10
Max
-
Units
Years
Notes
10% and 90% of V
DD
5 ns
0.5 V
DD
Equivalent AC Load Circuit
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