1
A
Specifications
Inputs and outputs of the P10-12 are TTL/DTL-compatible. Outputs can
drive one standard TTL (74 series) load or four LSTTL (74LS) loads.
CMOS compatibility can be achieved by connecting a 10 IcS2 pullup
resistor from the PI)-12 output to +5 V. Table A-1 and Table A-2 list
PIO-12 specifications.
Table A-1. Input and Output Specifications
Logic Inputs and Outputs 1 Minimum j Maximum
Input logic low voltage - 0 . 5 V 0 . 8 V
Input logic high voltage
Input load current for the PA, PB,
and PC ports (0 < Vin < 5 V)
Input low current interrupt inputs
Input high current interrupt inputs
2.0 V
-10µA
Output low voltage for PA, PB,
and PC ports (Isink = 1.7 mA)
Output high voltage for PA, PB,
and PC ports ( I „ u „ , = 200 µA)
2.4 V
5.0 V
10µA
-0.4 mA
20µA
-0.45 V
A-1
Содержание PIO-12
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