參數(shù)資料
型號： LM12458CIVF/NOPB
廠商： NATIONAL SEMICONDUCTOR CORP
元件分類： 模擬信號調(diào)理
英文描述： SPECIALTY ANALOG CIRCUIT, PQFP44
封裝： PLASTIC, QFP-44
文件頁數(shù)： 35/36頁
文件大?。?/td> 1195K
代理商： LM12458CIVF/NOPB
Digital Characteristics (Notes 6, 7)
The following specifications apply to the LM12454, LM12458, and LM12H458 for V
A+=VD+ = 5V, unless otherwise specified.
Boldface limits apply for T
A =TJ =TMIN to TMAX; all other limits TA =TJ = 25C.
Symbol
Parameter
Conditions
Typical
Limits
Units
V
IN(1)
Logical “1” Input Voltage
V
A+=VD+ = 5.5V
2.0
V (min)
V
IN(0)
Logical “0” Input Voltage
V
A+=VD+ = 4.5V
0.8
V (max)
I
IN(1)
Logical “1” Input Current
V
IN = 5V
0.005
1.0
A (max)
I
IN(0)
Logical “0” Input Current
V
IN = 0V
0.005
1.0
A (max)
C
IN
D0–D15 Input Capacitance
6
pF
V
OUT(1)
Logical “1” Output Voltage
V
A+=VD+ = 4.5V
I
OUT = 360 A
2.4
V (min)
I
OUT = 10 A
4.25
V (min)
V
OUT(0)
Logical “0” Output Voltage
V
A+=VD+ = 4.5V
I
OUT = 1.6 mA
0.4
V (max)
I
OUT
TRI-STATE Output Leakage Current
V
OUT = 0V
0.01
3.0
A (max)
V
OUT = 5V
0.01
3.0
A (max)
Digital Timing Characteristics (Notes 6, 7, 8)
The following specifications apply to the LM12454, LM12458, and LM12H458 for V
A+=VD+ = 5V, tr =tf = 3 ns, and CL = 100
pF on data I/O, INT and DMARQ lines unless otherwise specified. Boldface limits apply for T
A =TJ =TMIN to TMAX; all other
limits T
A =TJ = 25C.
Symbol (See Figures
Parameter
Conditions
Typical
Limits
Units
1, 3
CS or Address Valid to ALE Low Set-Up
Time
40
ns (min)
2, 4
CS or Address Valid to ALE Low Hold
Time
20
ns (min)
5
ALE Pulse Width
45
ns (min)
6
RD High to Next ALE High
35
ns (min)
7
ALE Low to RD Low
20
ns (min)
8
RD Pulse Width
100
ns (min)
9
RD High to Next RD or WR Low
100
ns (min)
10
ALE Low to WR Low
20
ns (min)
11
WR Pulse Width
60
ns (min)
12
WR High to Next ALE High
75
ns (min)
13
WR High to Next RD or WR Low
140
ns (min)
14
Data Valid to WR High Set-Up Time
40
ns (min)
15
Data Valid to WR High Hold Time
30
ns (min)
16
RD Low to Data Bus Out of TRI-STATE
40
10
ns (min)
70
ns (max)
17
RD High to TRI-STATE
R
L =1k
30
10
ns (min)
110
ns (max)
18
RD Low to Data Valid (Access Time)
30
10
ns (min)
80
ns (max)
20
Address Valid or CS Low to RD Low
20
ns (min)
21
Address Valid or CS Low to WR Low
20
ns (min)
19
Address Invalid from RD or WR High
10
ns (min)
22
INT High from RD Low
30
10
ns (min)
60
ns (max)
23
DMARQ Low from RD Low
30
10
ns (min)
60
ns (max)
LM12454/LM12458/LM12H458
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