MD80C51FB 查看數據表（PDF） - Intel
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MD80C51FB Datasheet PDF : 12 Pages
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M80C51FB
A C CHARACTERISTICS (Over Specified Operating Conditions)
EXTERNAL PROGRAM MEMORY CHARACTERISTICS
Symbol
Parameter
12 MHz
16 MHz
Oscillator Oscillator
Variable
Oscillator
Unit
Min Max Min Max
Min
Max
1 TCLCL Oscillator Frequency
M80C51FB
M80C51FB-16
35
35
12
16
MHz
TLHLL ALE Pulse Width
127
85
2TCLCLb40
ns
TAVLL Address Valid to ALE Low 43
23
TCLCLb40
ns
TLLAX Address Hold After ALE Low 53
33
TCLCLb30
ns
TLLIV
ALE Low to
Valid Instruction In
234
150
4TCLCLb110 ns
TLLPL ALE Low to PSEN Low
53
33
TCLCLb30
ns
TPLPH PSEN Pulse Width
205
143
3TCLCLb45
ns
TPLIV
PSEN Low to
Valid Instruction In
145
83
3TCLCLb115 ns
TPXIX Input Instruction Hold
0
0
0
ns
After PSEN
TPXIZ
Input Instruction Float
After PSEN
59
38
TCLCLb25 ns
TAVIV
Address to
Valid Instruction In
312
208
5TCLCLb115 ns
TPLAZ PSEN Low to Address Float
10
10
20
ns
TRLRH RD Pulse Width
400
275
6TCLCLb100
ns
TWLWH WR Pulse Width
400
275
6TCLCLb100
ns
TRLDV RD Low to Valid Data In
252
147 5
5TCLCLb175 ns
TRHDX Data Hold After RD
0
0
0
ns
TRHDZ Data Float After RD
107
65
2TCLCLb60 ns
TLLDV ALE Low to Valid Data In
517
350
8TCLCLb160 ns
TAVDV Address to Valid Data In
585
398
9TCLCLb175 ns
TLLWL ALE Low to RD or WR Low 200 300 138 238 3TCLCLb50 3TCLCLa50 ns
TAVWL Address Valid to WR Low 203
120
4TCLCLb130
ns
TQVWX Data Valid before WR
33
13
TCLCLb50
ns
TWHQX Data Hold after WR
33
13
TCLCLb50
ns
TQVWH Data Valid to WR High
433
288
7TCLCLb150
ns
TRLAZ RD Low to Address Float
0
0
0
ns
TWHLH RD or WR High to ALE High 43 123 23 103 TCLCLb40 TCLCLa40 ns
NOTE
7 Case temperatures are ‘‘instant on’’
9
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