Ika labworldsoft Uživatelský manuál stáhnout pdf (Strana 63)

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77//HYHO

TTL (

ransistor-

ogic) levels define the voltage values for distinguishing a logic level 0

from a logic level 1.

The voltage range of the TTL logic is from 0 - 5V (corresponding to a numerical value of 0 - 5 in

ODEZRUOGVRIW) while values from 0 - 0.8V correspond to the logic level 0, and values from 2 - 5V

correspond to the logical level 1. The range of 0.8 - 2V is the hysteresis between the levels (if a

signal is recognized as Low, the value must rise to above 2 in order to be recognized as High; if

High is recognized, the value must drop to below 0.8 in order to be recognized as Low).

As a rule, where TTL output or input levels within

ODEZRUOG

VRIW are concerned,

1XPHULFDO

9DOXHV of 0 or 5 are meant.

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Ika labworldsoft Uživatelský manuál Strana 63