Tandy 1000 HX Technical Reference Manual page 152

TANDY COMPUTER PRODUCTS
2.0 ENVIROMENTAL SPECIFICATIONS
2.1 Storage temperature: -65°C min., +150°C max.
2.2 Operating temperature: 0°C min., +25°C typ
f
+70°C max.
3.0 DC ELECTRICAL SPECIFICATIONS
3.1 Absolute Maximum Rating:
Voltage on any pin
w.r.t. Ground: -0.5 min., 7.0 max. volts
3.2 Operating Electrical Specifications:
Min. Typ. Max. Units
3.2.1 Operating Ambient:
Air Temperatue Range 0 25 70 °C
3.2.2 Power Supplies:
VCC 4.5 5.0 5.5 volts
VSS 0 0 0 volts
ICC milli-
amps
Total Power milli-
watts
3.2.3 Leakage Current, All Inputs:
Vin = 0.0 v -10 micro-
amps
Vin = 5.0 v +10 micro-
amps
3.2.4 Input voltages:
3.2.4.1 Except RDDATA*, TRK*
Logic "0" .8 volts
Logic "1" 2.0 volts
3.2.4.2 RDDATA*, TRK*
Positive going threshold 1.8 volts
Negative going threshold 1.2 volts
Hysteresis voltage 220 milli-
volts
3.2.5 Output Voltages:
3.2.5.1 Except WRDATA*, STEP*
Logic "0" @ 4.0 mA load .4 volts
Logic "1" @ 4.0 mA load 2.4 volts
3.2.5.2 WRDATA*, STEP*
Logic "0" @ 48 mA .5 volts
3.2.6 Input Capacitance (0.0 < Vin < 5.0)
All inputs 10 pf
3.2.7 Output Capacitance
All loads 50 pf