LM556CM [TI]
Dual Timer;
| 型号： | LM556CM |
| 厂家： | 
TEXAS INSTRUMENTS |
| 描述： | Dual Timer 光电二极管 |
| 文件： | 总10页 (文件大小：235K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
LM556
LM556 Dual Timer
Literature Number: SNAS549
March 2000
LM556
Dual Timer
General Description
Features
n Direct replacement for SE556/NE556
n Timing from microseconds through hours
The LM556 Dual timing circuit is a highly stable controller ca-
pable of producing accurate time delays or oscillation. The
556 is a dual 555. Timing is provided by an external resistor
and capacitor for each timing function. The two timers oper-
ate independently of each other sharing only VCC and
ground. The circuits may be triggered and reset on falling
waveforms. The output structures may sink or source
200mA.
n Operates in both astable and monostable modes
n Replaces two 555 timers
n Adjustable duty cycle
n Output can source or sink 200mA
n Output and supply TTL compatible
n Temperature stability better than 0.005% per ˚C
n Normally on and normally off output
Applications
n Precision timing
n Pulse generation
n Sequential timing
n Time delay generation
n Pulse width modulation
n Pulse position modulation
n Linear ramp generator
Connection Diagram
Dual-In-Line, Small Outline Packages
DS007852-1
Top View
Ordering Information
Package
Part Number
Package Marking
LM556CM
Media Transport
NSC Drawing
M14A
14-Pin SOIC
LM556CM
LM556CMX
LM556CN
Rails
2.5k Units Tape and Reel
Rails
LM556CM
14-Pin MDIP
LM556CN
N14a
© 2000 National Semiconductor Corporation
DS007852
www.national.com
Schematic Diagram
www.national.com
2
Absolute Maximum Ratings (Note 1)
If Military/Aerospace specified devices are required,
please contact the National Semiconductor Sales Office/
Distributors for availability and specifications.
Storage Temperature Range
Soldering Information
−65˚C to +150˚C
260˚C
Dual-In-Line Package
Soldering (10 Seconds)
Small Outline Packages
Vapor Phase (60 Seconds)
Infrared (15 Seconds)
Supply Voltage
+18V
215˚C
220˚C
Power Dissipation (Note 2)
LM556CM
410 mW
See AN-450 “Surface Mounting Methods and Their Effect
on Product Reliability” for other methods of soldering
surface mount devices.
LM556CN
1620 mW
Operating Temperature Ranges
LM556C
0˚C to +70˚C
Electrical Characteristics
(TA = 25˚C, VCC = +5V to +15V, unless otherwise specified)
Parameter
Conditions
Limits
LM556C
Typ
Units
Min
Max
Supply Voltage
4.5
16
V
∞
Supply Current
VCC = 5V, RL
=
3
6
∞
(Each Timer Section)
VCC = 15V, RL
=
10
14
mA
(Low State) (Note 3)
Timing Error, Monostable
Initial Accuracy
0.75
50
%
Drift with Temperature
RA = 1k to 100kΩ,
ppm/˚C
C = 0.1µF, (Note 4)
Accuracy over Temperature
Drift with Supply
1.5
0.1
%
%/V
Timing Error, Astable
Initial Accuracy
2.25
150
3.0
%
ppm/˚C
%
Drift with Temperature
Accuracy over Temperature
Drift with Supply
RA, RB = 1k to 100kΩ,
C = 0.1µF, (Note 4)
0.30
5
%/V
V
Trigger Voltage
VCC = 15V
VCC = 5V
4.5
5.5
2.0
1.0
1
1.25
1.67
0.2
V
Trigger Current
Reset Voltage
Reset Current
Threshold Current
µA
0.4
0.5
V
0.1
0.6
mA
VTH = V-Control (Note 6)
VTH = 11.2V
0.03
0.1
250
µA
nA
Control Voltage Level and
Threshold Voltage
VCC = 15V
VCC = 5V
9
2.6
10
3.33
11
4
V
Pin 1, 13
1
100
nA
Leakage Output High
Pin 1, 13 Sat
(Note 7)
Output Low
VCC = 15V, I = 15mA
VCC = 4.5V, I = 4.5mA
VCC = 15V
180
80
300
200
mV
mV
Output Low
Output Voltage Drop (Low)
ISINK = 10mA
ISINK = 50mA
ISINK = 100mA
ISINK = 200mA
VCC = 5V
0.1
0.4
2
0.25
0.75
2.75
V
V
V
V
2.5
ISINK = 8mA
V
V
ISINK = 5mA
0.25
0.35
3
www.national.com
Electrical Characteristics (Continued)
(TA = 25˚C, VCC = +5V to +15V, unless otherwise specified)
Parameter
Conditions
Limits
LM556C
Typ
Units
Min
Max
Output Voltage Drop (High)
ISOURCE = 200mA, VCC = 15V
ISOURCE = 100mA, VCC = 15V
VCC = 5V
12.5
V
V
12.75
2.75
13.3
3.3
V
Rise Time of Output
100
ns
ns
Fall Time of Output
100
Matching Characteristics
Initial Timing Accuracy
Timing Drift with Temperature
Drift with Supply Voltage
(Note 8)
0.1
2.0
0.5
%
±
10
ppm/˚C
%/V
0.2
Note 1: Absolute Maximum Ratings indicate limits beyond which damage to the device may occur.
Note 2: For operating at elevated temperatures the device must be derated based on a +150˚C maximum junction temperature and a thermal resistance of 77˚C/W
(Plastic Dip), and 110˚C/W (SO-14 Narrow).
Note 3: Supply current when output high typically 1mA less at V
= 5V.
CC
Note 4: Tested at V
= 5V and V
= 15V.
CC
CC
Note 5: As reset voltage lowers, timing is inhibited and then the output goes low.
Note 6: This will determine the maximum value of R + R for 15V operation. The maximum total (R + R ) is 20 MΩ.
A
B
A
B
Note 7: No protection against excessive pin 1, 13 current is necessary providing the package dissipation rating will not be exceeded.
Note 8: Matching characteristics refer to the difference between performance characteristics of each timer section.
Note 9: Refer to RETS556X drawing of military LM556J versions.
Typical Performance Characteristics
Minimum Pulse Width Required for Triggering
Supply Current vs. Supply Voltage (Each Section)
DS007852-4
DS007852-3
www.national.com
4
Typical Performance Characteristics (Continued)
High Output Voltage vs. Output Source Current
Low Output Voltage vs. Output Sink Current
DS007852-5
DS007852-6
Low Output Voltage vs. Output Sink Current
Low Output Voltage vs. Output Sink Current
DS007852-7
DS007852-8
Output Propagation Delay vs. Voltage Level of Trigger
Pulse
Output Propagation Delay vs. Voltage Level of Trigger
Pulse
DS007852-9
DS007852-10
5
www.national.com
Typical Performance Characteristics (Continued)
Discharge Transistor (Pin 1, 13) Voltage vs. Sink
Current
Discharge Transistor (Pin 1, 13) Voltage vs. Sink
Current
DS007852-11
DS007852-12
www.national.com
6
Physical Dimensions inches (millimeters) unless otherwise noted
Small Outline Package (M)
NS Package Number M14A
14-Lead (0.118” Wide) Molded Mini Small Outline Package
NS Package Number N14A
7
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Notes
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