SAF-C517A-4RM Ver la hoja de datos (PDF) - Infineon Technologies
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SAF-C517A-4RM Datasheet PDF : 72 Pages
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C517A
AC Characteristics (18 MHz, cont’d)
External Data Memory Characteristics
Parameter
RD pulse width
WR pulse width
Address hold after ALE
RD to valid data in
Data hold after RD
Data float after RD
ALE to valid data in
Address to valid data in
ALE to WR or RD
Address valid to WR or RD
WR or RD high to ALE high
Data valid to WR transition
Data setup before WR
Data hold after WR
Address float after RD
Symbol
18 MHz
Clock
min. max.
tRLRH
tWLWH
tLLAX2
tRLDV
tRHDX
tRHDZ
tLLDV
tAVDV
tLLWL
tAVWL
tWHLH
tQVWX
tQVWH
tWHQX
tRLAZ
233 –
233 –
81 –
–
128
0
–
–
51
–
294
–
335
117 217
92 –
16 96
11 –
239 –
16 –
–
0
Limit Values
Variable Clock
1/tCLCL = 3.5 MHz to 18 MHz
min.
max.
6 tCLCL – 100
6 tCLCL – 100
2 tCLCL – 30
–
0
–
–
–
5 tCLCL – 150
–
–
–
–
3 tCLCL – 50
4 tCLCL – 130
tCLCL – 40
tCLCL – 45
7 tCLCL – 150
tCLCL – 40
–
2 tCLCL – 60
8 tCLCL – 150
9 tCLCL – 165
3 tCLCL + 50
–
tCLCL + 40
–
–
–
0
Unit
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
External Clock Drive Characteristics
Parameter
Symbol
Oscillator period
High time
Low time
Rise time
Fall time
tCLCL
tCHCX
tCLCX
tCLCH
tCHCL
min.
55.6
15
15
–
–
Limit Values
Variable Clock
Freq. = 3.5 MHz to 18 MHz
max.
285.7
t t – CLCL CLCX
t t – CLCL CHCX
15
15
Unit
ns
ns
ns
ns
ns
Semiconductor Group
59
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