Tandy 1000 HX Technical Reference Manual page 237

12
TANDY COMPUTER PRODUCTS
OUTPUT VOLTAGES CURRENT LOADING|MIN TYP MAX UNITS
LOGIC "0" (Vol) 0.4 volts
@ 4.0 MA LOAD
LOGIC "1" (Voh) 2.4 volts
@ 0.4 MA LOAD
INPUT CAPACITANCE MIN TYP MAX
All inputs 0.0 < Vin < 5.0 10 picofarads
OUTPUT CAPACITANCE
All outputs 50 picofarads
Except Data (bi-directional)
BI-DIRECTIONAL CAPACITANCE
SEE NOTES 3-6 IN THE FOLLOWING SECTION.