NE555G-S08-T [UTC]
SINGLE TIMER; 单TIMER型号: | NE555G-S08-T |
厂家: | Unisonic Technologies |
描述: | SINGLE TIMER |
文件: | 总8页 (文件大小:200K) |
中文: | 中文翻译 | 下载: | 下载PDF数据表文档文件 |
UNISONIC TECHNOLOGIES CO., LTD
NE555
LINEAR INTEGRATED CIRCUIT
SINGLE TIMER
DESCRIPTION
The UTC NE555 is a highly stable timer integrated circuit. It can
be operated in both Astable and Monostable mode. With monostable
operation, the time delay is precisely controlled by one external and
one capacitor. With a stable operation as an oscillator the frequency
and duty cycle are both accurately controlled with two external
resistors and one capacitor.
FEATURES
*High current driver capability(=200mA).
*Adjustable duty cycle.
*Timing from μs to hours.
*Turn off time less than 2μs.
*Operates in both astable and monostable modes.
ORDERING INFORMATION
Ordering Number
Package
Packing
Normal
Lead Free
Halogen Free
NE555G-D08-T
NE555G-S08-R
NE555G-S08-T
NE555-D08-T
NE555-S08-R
NE555-S08-T
NE555L-D08-T
NE555L-S08-R
NE555L-S08-T
DIP-8
SOP-8
SOP-8
Tube
Tape Reel
Tube
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Copyright © 2010 Unisonic Technologies Co., Ltd
QW-R106-001,F
NE555
LINEAR INTEGRATED CIRCUIT
PIN CONFIGURATION
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NE555
LINEAR INTEGRATED CIRCUIT
BLOCK DIAGRAM
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NE555
LINEAR INTEGRATED CIRCUIT
ABSOLUTE MAXIMUM RATINGS
PARAMETER
SYMBOL
VCC
RATINGS
16
UNIT
V
Supply Voltage
Power Dissipation
PD
600
mW
℃
Junction Temperature
Operating Temperature
Storage Temperature
TJ
+125
℃
TOPR
TSTG
-20 ~ +85
-40 ~ +150
℃
Note: Absolute maximum ratings are those values beyond which the device could be permanently damaged.
Absolute maximum ratings are stress ratings only and functional device operation is not implied.
ELECTRICAL CHARACTERISTICS (VCC=5 ~ 15V, Ta=25℃, unless otherwise specified.)
PARAMETER
SYMBOL
VCC
TEST CONDITIONS
MIN
4.5
TYP
MAX UNIT
Supply Voltage
16
6
V
mA
mA
%
VCC=5V, RL=∝
VCC=15V, RL=∝
RA=1k ~ 100kΩ
3
Supply Current (Note 1)
ICC
7.5
1.0
2.25
50
15
3.0
Monostable
Astable
Initial Accurary (Note 2)
ACCUR
%
Monostable
ppm/°C
Drift with Temperature
Drift with Supply Voltage
Control Voltage
Δt/ΔT
Δt/ΔVCC
VC
C=0.1μF
Astable
150
0.1
ppm/°C
%/V
%/V
V
Monostable
Astable
0.5
0.3
VCC=15V
VCC=5V
VCC=15V
VCC=5V
9.0
2.6
10.0
3.33
10.0
3.33
0.1
11.0
4.0
V
V
Threshold Voltage
Threshold Current(Note 3)
Trigger Voltage
VTH
ITH
V
0.25
2.2
5.6
2.0
1.0
0.4
μA
V
VCC=5V
1.1
4.5
1.67
5
VTR
V
CC=15V
V
Trigger Current
Reset Voltage
Reset Current
ITR
VRST
IRST
VTR=0
0.01
0.7
μA
V
0.4
0.1
mA
VCC=15V
ISINK=10mA
ISINK=50mA
VCC=5V
0.06
0.3
0.25
0.75
V
V
Low Output Voltage
High Output Voltage
VOL
ISINK=5mA
0.05
12.5
0.35
V
VCC=15V
ISOURCE=200mA
ISOURCE=100mA
V
V
VOH
12.75 13.3
VCC=5V, ISOURCE=100mA
2.75
3.3
100
100
20
V
Rise Time of Output
tR
tF
ns
ns
nA
Fall Time of Output
Discharge Leakage Current
ILKG
100
Note 1: Supply current when output high typically 1mA less at VCC=5V.
Note 2: Tested at VCC=5.0V and VCC=15V.
Note 3: This will determine the maximum value of RA+RB for 15V operation, The maximum total is R=20MΩ, and for
5V operation the maximum total is R=6.7MΩ.
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NE555
LINEAR INTEGRATED CIRCUIT
TYPICAL APPLICATION CIRCUIT
RB
RA
C1
Discharge
Trigger
Threshold
2
6
5
7
Q1
Upper
comparator
Lower
comparator
R3
VCC
1
8
4
R2
R1
GND
FLIP-FLOP
Reset
UTC NE555
3
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NE555
LINEAR INTEGRATED CIRCUIT
TYPICAL APPLICATION NOTES
The application circuit shows astable mode configuration.
Pin 6 (Threshold ) is tied to Pin 2 ( Trigger ) and Pin 4 ( reset ) is tied to VCC ( Pin 8 ). The external capacitor C1 of
Pin 6 and Pin 2 charges through RA, RB and dischages through RB only. In the internal circuit of UTC NE555 , one
input of the upper comparator is at voltage of 2/3Vcc(R1=R2=R3),another input is connected to Pin 6.As soon
as C1 is charging to higher than 2/3Vcc, transistor Q1 is turned ON and discharge C1 to collector voltage of
transistor Q1. Therefore, the flip-flop circuit is reset and output is low. One input of lower comparator is at voltage of
1/3Vcc, discharge transistor Q1 turn off and C1 charges through RA and RB. Therefore, the flip-flop circuit is set
output high.
That is, when C1 charges through RA and RB , output is high and when C1 discharge through RB ,output is low.
The charge time(output is high) t1 is 0.693(RA+RB) C1 and the discharge time (output is low) T2 is 0.693 RB*C1.
1
Vcc− Vcc
3
2
Vcc− Vcc
3
⎛
⎜
⎞
⎟
ln
=0.693
⎜
⎟
⎜
⎟
⎠
⎝
T1=0.693*(RA+RB)*C1
T2=0.693*RB*C1
Thus the total period time T is given by
T=T1+T2=0.693(RA+2RB)*C1.
Then the frequency of astable mode is given by
1
1.44
f =
=
T
(RA + 2RB) * C1
The duty cycle is given by
T2
RB
D.C. =
=
T
RA + 2RB
.
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NE555
LINEAR INTEGRATED CIRCUIT
TYPICAL CHARACTERISTICS
Low-Level Output Voltage vs
Low-Level Output Current
Low-Level Output Voltage vs
Low-Level Output Current
10
7
10
7
VCC=10V
VCC=5V
4
2
4
TA=-55℃
TA=25℃
2
TA=25℃
TA=-55℃
1
0.7
1
0.7
0.4
TA=125℃
0.4
0.2
TA=125℃
0.2
0.1
0.07
0.1
0.07
0.04
0.04
0.02
0.01
0.02
0.01
1
4
2
20
40 70 100
1
2
4
10
20
70 100
7
10
7
40
Low-Level Output Current,IOL (mA)
Low-Level Output Current,IOL (mA)
Low-Level Output Voltage vs
Low-Level Output Current
10
7
VCC=15V
4
TA=-55℃
2
1
0.7
0.4
TA=25℃
0.2
TA=125℃
0.1
0.07
0.04
0.02
0.01
1
2
4
7 10
20
40 70 100
Low-Level Output Current,IOL (mA)
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NE555
LINEAR INTEGRATED CIRCUIT
UTC assumes no responsibility for equipment failures that result from using products at values that
exceed, even momentarily, rated values (such as maximum ratings, operating condition ranges, or
other parameters) listed in products specifications of any and all UTC products described or contained
herein. UTC products are not designed for use in life support appliances, devices or systems where
malfunction of these products can be reasonably expected to result in personal injury. Reproduction in
whole or in part is prohibited without the prior written consent of the copyright owner. The information
presented in this document does not form part of any quotation or contract, is believed to be accurate
and reliable and may be changed without notice.
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