|
|
|
부품번호 | MC1455P1 기능 |
|
|
기능 | Timers | ||
제조업체 | ON Semiconductor | ||
로고 | |||
전체 10 페이지수
www.DataSheet4U.com
MC1455, MC1455B,
NCV1455B
Timers
The MC1455 monolithic timing circuit is a highly stable controller
capable of producing accurate time delays or oscillation. Additional
terminals are provided for triggering or resetting if desired. In the time
delay mode, time is precisely controlled by one external resistor and
capacitor. For astable operation as an oscillator, the free−running
frequency and the duty cycle are both accurately controlled with two
external resistors 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.
• Direct Replacement for NE555 Timers
• Timing from Microseconds through Hours
• Operates in Both Astable and Monostable Modes
• Adjustable Duty Cycle
• High Current Output Can Source or Sink 200 mA
• Output Can Drive MTTL
• Temperature Stability of 0.005% per °C
• Normally ON or Normally OFF Output
10 k
0.1 mF
5
0.01 mF
1.0 k
38
46
2 MC1455 7
R
1 1.0 mF
MT2
20 M G
C
−10 V
Load
MT1
1N4003
t = 1.1; R and C = 22 sec
Time delay (t) is variable by
changing R and C (see Figure 16).
1N4740
3.5 k
−
10
mF
250 V +
http://onsemi.com
MARKING
DIAGRAMS
8
1
P1 SUFFIX
PLASTIC PACKAGE
CASE 626
XXXXXXXXX
AWL
YYWW
8
1
D SUFFIX
PLASTIC PACKAGE
CASE 751
8
XXXXXX
ALYW
1
xx = Specific Device Code
A = Assembly Location
WL, L = Wafer Lot
YY, Y = Year
WW, W = Work Week
ORDERING INFORMATION
See detailed ordering and shipping information in the package
dimensions section on page ___ of this data sheet.
(Create − Named − OrderingInfoText.)
Figure 1. 22 Second Solid State Time Delay Relay Circuit
VR ICC VCC
VCC
8
5k
6
Threshold
5
Control Voltage
5k
Trigger
2
5k
+
Comp
−A
+
Comp
−B
1
Gnd
Flip
R Flop
Q
S Inhibit/
Reset
4
Reset
7
Discharge
3
Output
+
0.01 mF
VO
Reset
5
Control
Voltage
3
Output
ISink
ISource
48
VCC
MC1455
700
7
Discharge
Threshold
6 Ith
Gnd Trigger
12
2.0 k
VS
Test circuit for measuring DC parameters (to set output and
measure parameters):
a) When VS w 2/3 VCC, VO is low.
b) When VS v 1/3 VCC, VO is high.
c) When VO is low, Pin 7 sinks current. To test for Reset, set VO
c) high, apply Reset voltage, and test for current flowing into Pin 7.
c) When Reset is not in use, it should be tied to VCC.
Figure 2. Representative Block Diagram
Figure 3. General Test Circuit
© Semiconductor Components Industries, LLC, 2004
March, 2004 − Rev. 8
1
Publication Order Number:
MC1455/D
www.DataSheet4U.com
MC1455, MC1455B, NCV1455B
1.015
1.010
1.015
1.010
1.005
1.000
1.005
1.000
0.995
0.990
0.985
0
5.0 10 15
VCC, SUPPLY VOLTAGE (Vdc)
20
Figure 10. Delay Time versus Supply Voltage
0.995
0.990
0.985
− 75 − 50 − 25 0 25 50 75
TA, AMBIENT TEMPERATURE (°C)
100 125
Figure 11. Delay Time versus Temperature
300
250
200
150 0°C
100
70°C
50
25°C
0
0
0.1 0.2
0.3
0.4
VT (min), MINIMUM TRIGGER VOLTAGE (x VCC = Vdc)
Figure 12. Propagation Delay
versus Trigger Voltage
http://onsemi.com
4
4페이지 www.DataSheet4U.com
MC1455, MC1455B, NCV1455B
APPLICATIONS INFORMATION
Linear Voltage Ramp
In the monostable mode, the resistor can be replaced by a
constant current source to provide a linear ramp voltage. The
capacitor still charges from 0 VCC to 2/3 VCC. The linear
ramp time is given by:
t = 2 VCC , where I = VCC − VB − VBE
31
RE
If VB is much larger than VBE, then t can be made
independent of VCC.
Missing Pulse Detector
The timer can be used to produce an output when an input
pulse fails to occur within the delay of the timer. To
accomplish this, set the time delay to be slightly longer than
the time between successive input pulses. The timing cycle
is then continuously reset by the input pulse train until a
change in frequency or a missing pulse allows completion of
the timing cycle, causing a change in the output level.
+VCC (5.0 V to 15 V)
VCC
Reset 4 8 VCC
RE
Digital 3
Output
2
Trigger
MC1455
7 VE
I
6
5
Sweep
Output
2N4403
or Equiv
C
R1
VB
R2
1 0.01 mF Control
Voltage
RL
Output
3
Input 2
Trigger
Reset
4
VCC
8
Discharge
MC1455
1
7
Threshold
6 Control
5 Voltage
0.01 mF
RA
C
2N4403
or Equiv
Figure 20. Linear Voltage Sweep Circuit
Figure 21. Missing Pulse Detector
t = 100 ms/cm
(RE = 10 kW, R2 = 100 kW, R1 = 39 kW, C = 0.01 mF, VCC = 15 V)
Figure 22. Linear Voltage Ramp Waveforms
t = 500 ms/cm
(RA = 2.0 kW, RL = 1.0 kW, C = 0.01 mF, VCC = 15 V)
Figure 23. Missing Pulse Detector Waveforms
http://onsemi.com
7
7페이지 | |||
구 성 | 총 10 페이지수 | ||
다운로드 | [ MC1455P1.PDF 데이터시트 ] |
당사 플랫폼은 키워드, 제품 이름 또는 부품 번호를 사용하여 검색할 수 있는 |
구매 문의 | 일반 IC 문의 : 샘플 및 소량 구매 ----------------------------------------------------------------------- IGBT, TR 모듈, SCR 및 다이오드 모듈을 포함한 광범위한 전력 반도체를 판매합니다. 전력 반도체 전문업체 상호 : 아이지 인터내셔날 사이트 방문 : [ 홈페이지 ] [ 블로그 1 ] [ 블로그 2 ] |
부품번호 | 상세설명 및 기능 | 제조사 |
MC1455P1 | Timers | ON Semiconductor |
MC1455P1 | Timing Circuits | Motorola Semiconductors |
DataSheet.kr | 2020 | 연락처 | 링크모음 | 검색 | 사이트맵 |