DS80C310_1 Datasheet, PDF (12/21 Pages) Dallas Semiconductor – High-Speed Micro

DS80C310
AC ELECTRICAL CHARACTERISTICS
PARAMETER
Oscillator Frequency
ALE Pulse Width
Port 0 Address Valid to ALE Low
Address Hold after ALE Low
ALE Low to Valid Instruction In
ALE Low to PSEN Low
PSEN Pulse Width
PSEN Low to Valid Instr. In
Input Instruction Hold after PSEN
Input Instruction Float after PSEN
Port 0 Address to Valid Instr. In
Port 2 Address to Valid Instr. In
PSEN Low to Address Float
SYMBOL
1/t_CLCL
t_LHLL
t_AVLL
t_LLAX1
t_LLIV
t_LLPL
t_PLPH
t_PLIV
t_PXIX
t_PXIZ
t_AVIV1
t_AVIV2
t_PLAZ
25 MHz
MIN MAX
0
33
40
10
10
56
10
55
41
0
26
71
81
0
(0°C to 70°C; V_CC=4.0V to 5.5V)
VARIABLE CLOCK
MIN
MAX
NOTES
0
33
MHz
1.5t_CLCL–5
ns
0.5t_CLCL–5
ns
0.5t_CLCL–5
ns
2.5t_CLCL–20
ns
0.5t_CLCL–5
ns
2t_CLCL–5
ns
2t_CLCL–20
ns
0
ns
t_CLCL–5
ns
3t_CLCL–20
ns
3.5t_CLCL–25
ns
0
ns
NOTES FOR AC ELECTRICAL CHARACTERISTICS
All parameters apply to both commercial and industrial temperature range operation unless otherwise noted. All sig-
nals characterized with load capacitance of 80 pF except Port 0, ALE, PSEN, RD and WR with 100 pF. Interfacing to
memory devices with float times (turn off times) over 25 ns may cause contention. This will not damage the parts, but
will cause an increase in operating current.
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