Switching
LANCAM B Family
Switching Characteristics
Table 9: Switching Characteristics
Cycle Time
-50
-70
-90
No.
Symbol
Parameter
Min. Max. Min. Max. Min. Max Notes
1
t
Chip Enable Compare Cycle Time
50
70
90
ELEL
Short Cycle
15
30
45
5
15
35
55
15
25
50
75
15
4
4
4
t
2
Chip Enable LOW Pulse Width
Chip Enable HIGH Pulse Width
Medium Cycle
Long Cycle
ELEH
3
4
5
6
t
EHEL
t
Control Input to Chip Enable LOW Setup Time
Control Input from Chip Enable LOW Hold Time
Chip Enable LOW to Outputs Active
2
10
3
2
10
3
2
10
3
5
5
6
CVEL
t
ELCX
t
ELQX
Register Read
Chip Enable LOW to Outputs Valid
Memory Read
30
40
10
30
52
10
50
75
15
4,6
4,6
7
t
7
ELQV
8
t
Chip Enable HIGH to Outputs HIGH-Z
Data to Chip Enable LOW Setup Time
Data from Chip Enable LOW Hold Time
Full In Valid to Chip Enable LOW Setup Time
Full In Valid to Full Flag Valid
3
2
3
2
3
2
EHQZ
9
t
DVEL
10
11
12
13
14
15
16
17
18
19
t
10
0
10
0
10
0
ELDX
t
FIVEL
t
5
5
7
FIVFFV
t
Chip Enable LOW to Full Flag Valid
Match in Valid to Chip Enable LOW Setup Time
Chip Enable HIGH to /MF, /MA, /MM Invalid
Match In Valid to /MF Valid, /MA, /MM
Chip Enable HIGH to /MF Valid
35
50
75
ELFFV
t
0
0
0
0
0
0
MIVEL
t
EHMFX
t
4
5
7
MIVMFV
t
16
18
16
18
25
25
EHMFV
EHMXV
t
Chip Enable HIGH to /MA and /MM Valid
Reset LOW Pulse Width
t
50
100
100
8
RLRH
Notes:
1.
2.
3.
4.
5.
6.
7.
8.
9.
1.0 Volts for a duration of 10 ns measured at the 50% amplitude points for Input-only lines (see Figure 12 on page 26).
Common I/O lines are clamped, so that signal transients can not fall below -0.5 Volts.
Over ambient operating temperature range and Vcc(min.) to Vcc(max.).
See Table 6 on page 22.
Control signals are /W, /CM, and /EC.
With load specified in Figure 11 on page 26, Test Load A.
With load specified in Figure 11 on page 26, Test Load B.
/E must be HIGH during this period to ensure accurate default values in the configuration registers.
With output and I/O pins unloaded.
10. TEST1 and/or TEST2 may not be implemented on all versions of these products.
Rev. 5.1
27
MUSIC [ MUSIC SEMICONDUCTORS ]
