HD74AC datasheet(29/52 Pages) HITACHI

29 / 52 page

Definition of Specifications

4. Symbols and Terms Defined for HD74AC Series

Explanation of Symbols Used in Electrical Characteristics and Recommended Operating Conditions

Table 5 DC Characteristics

Symbol

Term

Description

High level input voltage

High level input voltage to ensure that a logic element operates

under some constraint

Low level input voltage

Low level input voltage to ensure that a logic element operates

under some constraint

Low level output voltage

Output voltage in effect when, under the input condition for

bringing the output low, the rated output current is allowed to flow

to the output terminal

High level output voltage

Output voltage in effect when, under the input condition for

bringing the output high, the rated output current is allowed to flow

to the output terminal

Forward input threshold

voltage

Input voltage in effect when the operation of a logic element varies

as the input is allowed to go up form a voltage level lower than the

reverse input threshold voltage V

Reverse input threshold

voltage

Input voltage in effect when the operation of a logic element varies

as the input is allowed to drop up form a voltage level higher than

the forward input threshold voltage V

Hysteresis voltage

Difference between forward input threshold voltage V

+ and reverse

threshold voltage V

Input leakage current

Input current that flows in when the rated maximum input voltage

is applied to the input terminal

Off-state output current

(high-impedance)

Current that flows to the 3-state output of an element under the

input condition for bringing the output to high-impedance state

Quiescent Supply current

Current that flows to the supply therminal (V

CC) under the rated

input condition

OLD

Minimum Dynamic Output

Current

Output current that flows in when, under the condition for bringing

the output low,the output terminal is tied to the rated out voltage

OLD.

OHD

Output current that flows out when, under the condition for

bringing the output high, the output terminal is tied to the rated out

voltage V

OHD.

CCT

Maximum I

CC /Input

Current that flows to the supply terminal (V

CC) under the rated input

condition

HD74AC датащи(PDF) 29 Page - Hitachi Semiconductor

HD74AC датащи(HTML) 29 Page - Hitachi Semiconductor

Html Pages

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52

датащи скачать

ссылки URL