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6.0 AC CHARACTERISTICS READ CYCLE (Post-Radiation)*
(VDD = 5.0V ±10%; -55°C < TC < +125°C)
Note:
* Post-radiation performance guaranteed at 25
°C per MIL-STD-883 Method 1019 at 1.0E6 rads(Si).
1. Guaranteed, but not tested.
SYMBOL
PARAMETER
MINIMUM
MAXIMUM
UNIT
tCLCL
Clock Period
50
ns
1/tCLCL
Oscillator Frequency
20
MHz
tLHLL
ALE Pulse Width
2 tCLCL-40
ns
tAVLL
Address Valid to ALE Low
tCLCL-40
ns
tLLAX
1
Address Hold after ALE Low
tCLCL-30
ns
tLLIV
ALE Low to Valid Instruction
4 tCLCL-100
ns
tLLPL
ALE Low to PSEN Low
tCLCL-30
ns
tPLPH
PSEN Pulse Width
3 tCLCL-45
ns
tPLIV
PSEN Low to Valid Instruction In
3 tCLCL-105
ns
tPXIX
1
Input Instruction Hold after PSEN
0
ns
tPXIZ
1
Input Instruction Float after PSEN
tCLCL-25
ns
tAVIV
Address to Valid Instruction In
5 tCLCL-105
ns
tPLAZ
1
PSEN Low to Address Float
10
ns
tRLRH
RD Pulse Width
6 tCLCL-100
ns
tWLWH
WR Pulse Width
6 tCLCL-100
ns
tRLDV
RD Low to Valid Data In
5 tCLCL-165
ns
tRHDX
1
Data Hold After RD High
0
ns
tRHDZ
1
Data Float After RD High
2 tCLCL-60
ns
tLLDV
ALE Low Valid Data In
8 tCLCL-150
ns
tAVDV
Address to Valid Data In
9 tCLCL-165
ns
tLLWL
ALE Low to RD or WR Low
3 tCLCL-50
3 tCLCL+50
ns
tAVWL
Address Valid to WR Low
4 tCLCL-130
ns
tQVWX
Data Valid Before WR High
tCLCL-33
ns
tWHQX
Data Hold After WR High
tCLCL-33
ns
tQVWH
Data Valid to WR High
7 tCLCL-150
ns
tRLAZ
1
RD Low to Address Float
0
ns
tWHLH
RD or WR High to ALE High
tCLCL-40
tCLCL+40
ns