參數(shù)資料
型號: M74HC138
廠商: 意法半導體
英文描述: 3 TO 8 LINE DECODER (INVERTING)
中文描述: 3至8線譯碼器(反相)
文件頁數(shù): 5/10頁
文件大小: 283K
代理商: M74HC138
M74HC138
5/10
CAPACITIVE CHARACTERISTICS
1) C
is defined as the value of the IC’s internal equivalent capacitance which is calculated from the operating current consumption without
load. (Refer to Test Circuit). Average operating current can be obtained by the following equation. I
CC(opr)
= C
PD
x V
CC
x f
IN
+ I
CC
TEST CIRCUIT
C
L
= 50pF or equivalent (includes jig and probe capacitance)
R
T
= Z
OUT
of pulse generator (typically 50
)
WAVEFORM 1: PROPAGATION DELAYS
FOR INVERTING OUTPUTS
(f=1MHz; 50% duty cycle)
Symbol
Parameter
Test Condition
Value
Unit
V
CC
(V)
T
A
= 25°C
-40 to 85°C
-55 to 125°C
Min.
Typ.
Max.
Min.
Max.
Min.
Max.
C
IN
C
PD
Input Capacitance
Power Dissipation
Capacitance (note
1)
5.0
5
10
10
10
pF
5.0
47
pF
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相關代理商/技術參數(shù)
參數(shù)描述
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