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Step 1 of 8 3.54DP The following are the eight electrical parameters for Transistor-Transistor Logic (TTL): The minimum output voltage that is guaranteed to be recognized as a HIGH, and its value 2.7 V for most of the TTL circuits. Step 2 of 8 : The minimum input voltage that is guaranteed to be recognized as a HIGH, and its value 2.0 V for most of the TTL circuits. Step 3 of 8 The maximum input voltage that is guaranteed to be recognized as a LOW, and its value 0.8 V for most of the TTL circuits. Step 4 of 8 The maximum input voltage in the LOW state, and its value 0.5 V for most of the TTL circuits. Step 5 of 8 The maximum current that an input to the TTL requires to pull it LOW state and it has negative value of 0.4 mA : The maximum input current required that is given to the TTL, hence to pull it to the HIGH state, its value is Step 6 of 8 The maximum current an output can sink in the LOW state while maintaining an output voltage no more than For TTL circuits its value, 8 mA Step 7 of 8 The maximum current an output can source in the HIGH state while maintaining an output voltage no more than For TTL circuits its value, 400 µA Step 8 of 8 According to www.ti.com the electrical parameter values for 74ALS00-Quadruple 2-input positive NAND gate are: Electrical Parameters values HIGH-level output voltage, 3 V HIGH-level input voltage, LOW-level output voltage, 0.4 V LOW-level input voltage, 0.8 V HIGH-level input current, 20 µA LOW-level input current, -100 µA LOW-level output current, 8 mA HIGH-level output current, -0.4 mA Table 1: The Electrical parameters of 74ALS00