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參數(shù)資料
| 型號： | HD74AC |
| 廠商： | Hitachi,Ltd. |
| 英文描述： | HD74AC Series Common Information |
| 中文描述： | HD74AC系列通用信息 |
| 文件頁數(shù)： | 29/52頁 |
| 文件大?。?/td> | 220K |
| 代理商： | HD74AC |
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Definition of Specifications
28
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
V
IH
High level input voltage
High level input voltage to ensure that a logic element operates
under some constraint
V
IL
Low level input voltage
Low level input voltage to ensure that a logic element operates
under some constraint
V
OL
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
V
OH
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
V
t
+
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
t
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
t
Difference between forward input threshold voltage V
t
threshold voltage V
t
Input current that flows in when the rated maximum input voltage
is applied to the input terminal
-
V
t
-
Reverse input threshold
voltage
+
V
h
Hysteresis voltage
+
and reverse
-
I
IN
Input leakage current
I
OZ
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
I
CC
Quiescent Supply current
Current that flows to the supply therminal (V
CC
) under the rated
input condition
I
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
V
OLD
.
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
.
Current that flows to the supply terminal (V
CC
) under the rated input
condition
I
OHD
I
CCT
Maximum I
CC
/Input
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|---|---|
| HD74AC00 | 制造商:HITACHI 制造商全稱:Hitachi Semiconductor 功能描述:Quad 2-Input NAND Gate |
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| HD74AC00FPEL | 制造商:RENESAS 制造商全稱:Renesas Technology Corp 功能描述:Quad 2-Input NAND Gate |
| HD74AC00P | 制造商:RENESAS 制造商全稱:Renesas Technology Corp 功能描述:Quad 2-Input NAND Gate |
| HD74AC00RPEL | 制造商:RENESAS 制造商全稱:Renesas Technology Corp 功能描述:Quad 2-Input NAND Gate |
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