LM556CM [FAIRCHILD]
Dual Timer; 双定时器
| 型号： | LM556CM |
| 厂家： | 
FAIRCHILD SEMICONDUCTOR |
| 描述： | Dual Timer |
| 文件： | 总8页 (文件大小：47K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
www.fairchildsemi.com
LM556/NE556
Dual Timer
Features
Description
• Replaces Two LM555/NE556 Timers
• Operates in Both Astable And Monostable Modes
• High Output Current
• TTL Compatible
• Timing From Microsecond To Hours
• Adjustable Duty Cycle
The LM556/NE556 series dual monolithic timing circuits
are a highly stable controller capable of producing accurate
time delays or oscillation. The LM556/NE556 is a dual
LM555. Timing is provided an external resistor and capaci-
tor for each timing function. The two timers operate inde-
pendently of each other, sharing only V
CC
and ground. The
• Temperature Stability Of 0.005% Per °C
circuits may be triggered and reset on falling waveforms.
The output structures may sink or source 200mA.
Applications
• Precision Timing
• Pulse Shaping
14-DIP
14-SOP
• Pulse Width Modulation
• Frequency Division
• Traffic Light Control
• Sequential Timing
• Pulse Generator
1
1
• Time Delay Generator
• Touch Tone Encoder
• Tone Burst Generator
Internal Block Diagram
Rev. 1.0.0
©2001 Fairchild Semiconductor Corporation
LM556/NE556
Absolute Maximum Ratings (T = 25°C)
A
Parameter
Symbol
Value
16
Unit
V
Supply Voltage
V
CC
Lead Temperature (soldering 10sec)
Power Dissipation
T
300
600
°C
LEAD
P
mW
D
Operating Temperature Range
LM556/NE556
T
0 ~ + 70
°C
°C
OPR
Storage Temperature Range
T
- 65 ~ + 150
STG
2
LM556/NE556
Electrical Characteristics
(T = 25°C, V
A
= 5 ~ 15V, unless otherwise specified)
CC
Parameter
Supply Voltage
Symbol
Conditions
Min.
Typ.
Max.
Units
V
-
4.5
-
16
V
CC
Supply Current * (two timers)
1
(low state)
V
V
= 5V, R = ∞
5
16
12
30
mA
mA
CC
CC
L
I
-
-
CC
= 15V, R = ∞
L
Timing Error * (monostable)
2
Initial Accuracy
Drift with Temperature
Drift with Supply Voltage
ACCUR R = 2KΩ to 100KΩ
0.75
50
0.1
%
ppm/°C
%/V
A
-
∆t/∆T
∆t/∆V
C = 0.1µF
T = 1.1RC
CC
Control Voltage
V
V
V
V
V
= 15V
= 5V
9.0
2.6
8.8
2.4
-
10.0
3.33
10.0
3.33
30
11.0
4.0
11.2
4.2
250
5.6
2.2
2.0
1.0
0.6
V
V
C
CC
CC
CC
CC
Threshold Voltage
V
= 15V
= 5V
V
TH
V
Threshold Current*
Trigger Voltage
I
-
nA
V
3
TH
V
V
V
V
= 15V
= 5V
4.5
1.1
-
5.0
TR
CC
CC
TR
1.6
V
Trigger Current
I
= 0V
0.01
0.6
µA
V
TR
Reset Voltage*
Reset Current
V
RST
RST
-
-
0.4
-
5
I
0.03
mA
V
= 15V
CC
V
I
I
I
I
= 10mA
= 50mA
= 100mA
= 200mA
0.1
0.4
2.0
2.5
0.25
0.75
3.2
SINK
SINK
SINK
SINK
Low Output Voltage
High Output Voltage
V
-
OL
V
= 5V
= 8mA
= 5mA
CC
I
I
0.25
0.15
0.35
0.25
SINK
SINK
V
V
V
I
I
= 15V
SOURCE
SOURCE
CC
= 200mA
= 100mA
12.5
13.3
-
12.75
V
OH
V
I
= 5V
SOURCE
CC
-
= 100mA
2.75
3.3
100
100
10
V
Rise Time of Output
t
-
-
-
-
-
-
300
300
100
ns
ns
nA
R
Fall Time of Output
t
F
Discharge Leakage Current
I
LKG
Matching Characteristics*4
Initial Accuracy
Drift with Temperature
Drfit with Supply Voltage
ACCUR
∆t/∆T
1.0
10
0.2
2.0
0.5
%
ppm/°C
%/V
-
-
-
∆t/∆V
CC
Timing Error (astable)*2
Initial Accuracy
Drift with Temperature
Drift with Supply Voltage
ACCUR
∆t/∆T
∆t/∆Vcc C = 0.1µF
V
= 15V
B
2.25
150
0.3
%
ppm/°C
%/V
CC
A
-
R ,R = 1KΩ to 100KΩ
Notes:
*1. Supply current when output is high is typically 1.0mA less at V
= 5V
CC
*2. Tested at V
CC
= 5V and V
= 15V
CC
*3. This will determine the maximum value of R + R for 15V operation.
A
B
The maximum total R = 20MΩ, and for 5V operation the maximum total R = 6.6MΩ.
*4. Matching characteristics refer to the difference between performance characteristics of each timer section in the monostable
mode.
*5. As reset voltage lowers, timing is inhibited and then the output goes low.
3
LM556/NE556
Mechanical Dimensions
Package
14-DIP
6.40 ±0.20
0.252 ±0.008
#1
#14
#7
#8
7.62
0.300
3.25 ±0.20
0.128 ±0.008
0.20
0.008
MIN
3.30 ±0.30
0.130 ±0.012
5.08
MAX
0.200
4
LM556/NE556
Mechanical Dimensions(Continued)
Package
14-SOP
0.05
0.002
MIN
1.55 ±0.10
0.061 ±0.004
#14
#1
#8
#7
6.00 ±0.30
0.236 ±0.012
1.80
MAX
0.071
3.95 ±0.20
0.156 ±0.008
5.72
0.225
0.60 ±0.20
0.024 ±0.008
5
LM556/NE556
Ordering Information
Product Number
LM556CN
LM556CM
NE556
Package
Operating Temperature
14-DIP
14-SOP
14-DIP
14-SOP
0 ~ + 70°C
NE556D
6
LM556/NE556
7
LM556/NE556
DISCLAIMER
FAIRCHILD SEMICONDUCTOR RESERVES THE RIGHT TO MAKE CHANGES WITHOUT FURTHER NOTICE TO ANY
PRODUCTS HEREIN TO IMPROVE RELIABILITY, FUNCTION OR DESIGN. FAIRCHILD DOES NOT ASSUME ANY
LIABILITY ARISING OUT OF THE APPLICATION OR USE OF ANY PRODUCT OR CIRCUIT DESCRIBED HEREIN; NEITHER
DOES IT CONVEY ANY LICENSE UNDER ITS PATENT RIGHTS, NOR THE RIGHTS OF OTHERS.
LIFE SUPPORT POLICY
FAIRCHILD’S PRODUCTS ARE NOT AUTHORIZED FOR USE AS CRITICAL COMPONENTS IN LIFE SUPPORT DEVICES
OR SYSTEMS WITHOUT THE EXPRESS WRITTEN APPROVAL OF THE PRESIDENT OF FAIRCHILD SEMICONDUCTOR
CORPORATION. As used herein:
1. Life support devices or systems are devices or systems
which, (a) are intended for surgical implant into the body,
or (b) support or sustain life, and (c) whose failure to
perform when properly used in accordance with
instructions for use provided in the labeling, can be
reasonably expected to result in a significant injury of the
user.
2. A critical component in any component of a life support
device or system whose failure to perform can be
reasonably expected to cause the failure of the life support
device or system, or to affect its safety or effectiveness.
www.fairchildsemi.com
5/22/01 0.0m 001
Stock#DSxxxxxxxx
2001 Fairchild Semiconductor Corporation
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