Tandy 1000 HX Technical Reference Manual page 143

8259A
A.C. CHARACTERISTICS
T
A
= 0°C to 70°C, V
C
c = 5V ± 5 % (8259 A-8), V
C
c = 5V ±10% (8259A, 8259A-2)
TIMING REQUIREMENTS
'Worst case timing for TCHCL in an actual microprocessor system is typically much greater than 500 ns (i.e. 8085A
1.6 fis, 8085A-2 = 1 /AS, 8086 = 1 jms, 8086-2 = 625 ns)
NOTE:
This is the low time required to clear the input latch in the edge triggered mode.
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