|
|
PDF MC1555 Data sheet ( Hoja de datos )
| Número de pieza | MC1555 | |
| Descripción | Timing Circuit | |
| Fabricantes | Motorola Semiconductors | |
| Logotipo |  |
|
Hay una vista previa y un enlace de descarga de MC1555 (archivo pdf) en la parte inferior de esta página. Total 8 Páginas | ||
|
No Preview Available !
MC1455
MC1555
Specifications and Applications
Information
I
4
TIMING CIRCUIT
The MC1555/MC1455 monolithic timing circuit is a highly stable
controller capable of producing accurate time delays, or oscilla-
tion. Additional terminals are provided for triggering or resetting
if desired. In the time delay mode of operation, the time is pre-
cisely controlled by one external resistor and capacitor. For asta-
ble operation as an oscillator, the free running frequency and the
duty cycle are both accurately controlled with two external resis-
tors and one capacitor. The circuit may be triggered and reset on
falling waveforms, and the output structure can source or sink up
to 200 mA or drive MTTL circuits.
q Direct Replacement for NE555/SE555 Timers
q Timing From Microseconds Through Hours
q operates in Both Astable and Monostable Modes
q Adjustable Duty Cycle
q High Current Output Can Source or Sink 200 mA
q output Can Drive MTTL
,7~*,2.>ya!
,.,.,*$~\*.Y, $
*tl~i;.
~.i,;.,x-
..$.*$::.?, .
‘s. .>,.
..‘,,, i\..M. ei‘t-i:l’
~,?,~‘,?,y.>}:.,:x+$*:,+,
!$,t..!l
METAL PACKAGE
CASE 601-04
1. Ground
2. Trigger
3. output
4. Reset
5. Control Voltage
6. Threshold
7. Discharge
8. Vcc
85
n1 4
(Top View)
PI SUFFIX
PLASTIC PACKAGE
CASE 626-04
(MC1455P1 only)
f~.>!~~
Vcc
~8
Threshold
Control
Voltage
Trigger
~ 5k
5
5k
-
2
5k
_A
_B
7
Gn~
MTTL is a trademark of Motorola Inc.
Flip
R FIOP
s Inhibiti
Reset
1‘4
Reset
7
Oischarge
output
U SUFFIX
CERAMIC PACKAGE
CASE 693-02
F*
Ik
~
V
1
D SUFFIX
PLASTIC PACKAGE s
*
,* J
CASE 751-01
1
SO-8
ORDERING INFORMATION
Device
Alternate
Temperature
Range
Package
MCI 455G
MC1455P1
MC1455D
Mcl 455U
MC1455BPI
MC1555G
MCI 555U
—
NE555V
—
—
—
SE555
O“cto +70”C Metal Can
O“c to + 70”C Plastic DIP
O“c to + 70°c SO-8
O“c to + 70°c Ceramic DIP
– 400CtO + a5”c Plastic DIP
– 55°C to + 125°C Metal Can
– 55°C to + 125°C Ceramic OIP
@MOTOROLA INC., 1985
DS9240R3
1 page  
GENERAL OPERATION (continued)
FIGURE 15 — MONOSTABLE WAVEFORMS
FIGURE 16 — TIME DELAY
(RA=lokQ,
t = 50 pslcrn
C= O.OltiF, RL= l.Ok~,
VCC=15V)
FIGURE 17 — ASTABLE CIRCUIT
I
I
‘.
:~’R, L
I
I
,
+vcc(5t0
15 v)
T
Reset
A
4
Vcc
8
1
t = 20 ps/cm
In the astable mode the ti:~{,~~@&nnected so Ihat it will
retrigger itself and cause the c~ac~@r voltage to oscillate between
1/3 VCC and 2/3 VCC. S~~ F i9&~’~7.
..? ~;.~.
The external capacitq%@J,a$@s to 2/3 VCC through RA and RB
and discharges to l~$:,$~~through
RB. By varying the ratio of
these resistors th~,~~wtttycle
can be varied. The charge and
discharge time~,ar~}~,~pendent
of the supply voltage.
The charge t~~>~$:t~ut high) is given bv: tl = 0.695 (RA+RB) C
The discha~: ti$e’(output low) bv: t2 = 0.695 (RB) C
Thus @,:*.’,’,~,..,$.,.,t,.$.*.*;.:)&3,riod is given bv: T = tl + t2 = 0.695 (RA+2RB) C
and flav be easilv found as shown in Figure 19.
RB
The duty cycle is given bv: DC = —
RA+2RB
To obtain the maximum dutv cvcle RA must be as small as
possible; but it must also be large enough to limit the discharge
current (pin 7 current) within the maximum rating of the discharge
transistor (200 mA).
The minimum value of RA is given bv:
VCC (Vdc)
VCC (Vdc)
>
‘A > 17 (A)
0.2
(RA=5.1 k~, C ‘0.01 vF, RL= l.Ok~;
RB=3.gk Q, VCC= 15 V)
FIGURE 19 — FREE-RUNNING FREQUENCY
100
10
z~
u
a+
G
:
6 0.1.
u
v-
\
\
0.01
(RA+2RB)
\
0.001
0.1
1,0 10
f, FREE-RUNNING
\
\\
\\
100 l.Ok
FREQUENCY
\
\
\
10 k
(Hz)
m MOTOROLA
Semiconductor Products Inc. ~
5
100k
5 Page | ||
| Páginas | Total 8 Páginas | |
| PDF Descargar | [ Datasheet MC1555.PDF ] | |
Hoja de datos destacado
| Número de pieza | Descripción | Fabricantes |
| MC1550G | RF - IF Amplifier |  ETC |
| MC1552G | (MC1553G) HIGH FREQUENCY VIDEO AMPLIFIER | ETC |
| MC1552G | (MC1552G / MC1553G) HIGH FREQUENCY VIDEO AMPLIFIER | ETC |
| MC1553G | (MC1552G / MC1553G) HIGH FREQUENCY VIDEO AMPLIFIER | ETC |
| Número de pieza | Descripción | Fabricantes |
| SLA6805M | High Voltage 3 phase Motor Driver IC. |
 Sanken |
| SDC1742 | 12- and 14-Bit Hybrid Synchro / Resolver-to-Digital Converters. |
 Analog Devices |
|
DataSheet.es es una pagina web que funciona como un repositorio de manuales o hoja de datos de muchos de los productos más populares, |
| DataSheet.es | 2020 | Privacy Policy | Contacto | Buscar |