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參數(shù)資料
| 型號： | TLC551CPE4 |
| 廠商： | TEXAS INSTRUMENTS INC |
| 元件分類： | 模擬波形發(fā)生器 |
| 英文描述： | PULSE; RECTANGULAR, 1.2 MHz, TIMER, PDIP8 |
| 封裝： | PLASTIC, DIP-8 |
| 文件頁數(shù)： | 3/17頁 |
| 文件大小： | 299K |
| 代理商： | TLC551CPE4 |
TLC551, TLC551Y
LinCMOS
TIMERS
SLFS044B – FEBRUARY 1984 – REVISED SEPTEMBER 1997
11
POST OFFICE BOX 655303
DALLAS, TEXAS 75265
APPLICATION INFORMATION
The equations below provide better agreement with measured values.
t
c(H) +
C
T
(R
A )
R
B
)In 3– exp
–t
PLH
C
T
(R
B )
ron)
) t
PHL
t
c(L) +
C
T
(R
B )
ron)In 3–exp
–t
PHL
C
T
(R
A )
R
B
)
) t
PLH
These equations and those given earlier are similar in that a time constant is multiplied by the logarithm of a number
or function. The limit values of the logarithmic terms must be between In 2 at low frequencies and In 3 at extremely
high frequencies. For a duty cycle close to 50%, an appropriate constant for the logarithmic terms can be substituted
with good results. Duty cycles less than 50%
t
c(H)
t
c(H) )
t
c(L)
require that
t
c(H)
t
c(L)
<1 and possibly RA ≤ ron. These
conditions can be difficult to obtain.
In monostable applications, the trip point of the trigger input can be set by a voltage applied to CONT. An input voltage
between 10% and 80% of the supply voltage from a resistor divider with at least 500-
A bias provides good results.
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