ne556 14p
NE556
SA556 - SE556
GENERAL PURPOSE DUAL BIPOLAR TIMERS
■ LOW TURN OFF TIME
■ MAXIMUM OPERATING FREQUENCY
GREATER THAN 500kHz
■ TIMING FROM MICROSECONDS TO
HOURS
■ OPERATES IN BOTH ASTABLE AND
MONOSTABLE MODES
N
DIP14
(Plastic Package)
■ HIGH OUTPUT CURRENT CAN SOURCE
OR SINK 200mA
■ ADJUSTABLE DUTY CYCLE
■ TTL COMPATIBLE
■ TEMPERATURE STABILITY OF 0.005%
PER°C
DESCRIPTION
The NE556 dual monolithic timing circuit is a highly stable controller capable of producing accurate
time delays or oscillation. In the time delay mode
of operation, the time is precisely controlled by
one external resistor and capacitor. For a stable
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 200mA.
ORDER CODE
Part Number
NE556
SA556
SE556
PIN CONNECTIONS (top view)
Discharge
1
14
VCC
Threshold
2
13
Discharge
Control Voltage 3
12
Threshold
Reset
4
11
Control Voltage
Package
Output
5
10
Reset
N
D
Trigger
6
9
Output
•
•
•
•
•
•
GND
7
8
Trigger
Temperature Range
0°C, 70°C
-40°C, 105°C
-55°C, 125°C
D
SO14
(Plastic Micropackage)
N = Dual in Line Package (DIP)
D = Small Outline Package (SO) - also available in Tape & Reel (DT)
June 2003
1/8
NE556- SA556-SE556
BLOCK DIAGRAM
VCC+
5kW
COMP
THRESHOLD
CONTROL VOLTAGE
DISCHARGE
R
FLIP-FLOP
Q
5kW
COMP
TRIGGER
OUT 1/2 NE556
S
INHIBIT/
RESET
5kW
S
RESET
SCHEMATIC DIAGRAM
CONTROL
VOLTAGE
OUTPUT
THRESHOLD
COMPARATOR
5
VCC
R2
830W
R1
4.7kW
R4 R8
1kW 5kW
R3
4.7kW
R12
6.8kW
Q21
Q5
Q6
Q7
Q8
Q19
Q9
Q20
Q22
31R
3.9kW
R11
5kW
THRESHOLD
Q2
Q3
Q11 Q12
TRIGGER
2
Q23
R9
5kW
D2
Q24
Q16
RESET
DISCHARGE
Q18
R16
100W
R15
4.7kW
Q15
7
Q17
Q14
GND
R14
220W
Q13
Q10
4
3
D1
R17
4.7kW
Q4
Q1
R5
10kW
R6
100kW
R7
100kW
R10
5kW
1
TRIGGER COMPARATOR
FLIP FLOP
ABSOLUTE MAXIMUM RATINGS
Symbol
VCC
Tj
Tstg
Parameter
Value
Unit
Supply Voltage
18
V
Junction Temperature
150
°C
-65 to 150
°C
Storage Temperature Range
OPERATING CONDITIONS
Symbol
Parameter
Supply Voltage
VCC
Vth, Vtrig, Vcl, Vreset
Toper
2/8
NE556
SA556
SE556
Maximum Input Voltage
Operating Free Air Temperature Range
for NE556
for SA556
for SE556
Value
4.5 to 16
4.5 to 16
4.5 to 18
VCC
0 to 70
-40 to 105
-55 to 125
Unit
V
V
°C
NE556-SA556-SE556
ELECTRICAL CHARACTERISTICS Tamb = +25°C, VCC = +5V to +15V (unless otherwise specified)
Symbol
ICC
VCL
Vth
Ith
Vtrig
Itrig
Vreset
Parameter
Supply Current (RL ∝) - note 1) (2 timers)
Low Stage
VCC = +5V
VCC = +15V
High State
VCC = +5V
Timing Error (monostable)
(RA = 2k to 100kΩ, C = 0.1µF)
Initial Accuracy - note 2)
Drift with Temperature
Drift with Supply Voltage
Timing Error (astable)
(RA, RB = 1kΩ to 100kΩ, C = 0.1µF, VCC = +15V)
Initial Accuracy - see note 2
Drift with Temperature
Drift with Supply Voltage
Control Voltage Level
VCC = +15V
VCC = +5V
Threshold Voltage
VCC = +15V
VCC = +5V
Threshold Current - note 3)
Trigger Voltage
VCC = +15V
VCC = +5V
Trigger Current (Vtrig = 0V)
Reset Voltage 4)
Reset Current
Vreset = +0.4V
Ireset
Vreset = 0V
Low Level Output Voltage
VCC = +15V
IO(sink) = 10mA
IO(sink) = 50mA
IO(sink) = 100mA
VOL
IO(sink) = 200mA
VCC = +5V
IO(sink) = 8mA
IO(sink) = 5mA
High Level Output Voltage
VCC = +15V
IO(sink) = 200mA
VOH
IO(sink) = 100mA
VCC = +5V
IO(sink) = 100mA
Discharge Pin Leakage Current
Idis(off)
(output high) (Vdis = 10V)
Discharge pin Saturation Voltage
(output low) - note 5)
Vdis(sat)
VCC = +15V, Idis = 15mA
VCC = +5V, Idis = 4.5mA
tr
Output rise Time
Output Fall Time
tf
toff
SE556
Min.
Turn off Time - note 6) (Vreset = VCC)
NE556 - SA556
Typ.
Max.
6
20
4
0.5
30
0.05
Min.
Typ.
Max.
10
24
6
20
4
12
30
2
100
0.2
1
50
0.1
3
0.5
mA
%
ppm/°C
%/V
%
ppm/°C
%/V
2.25
150
0.3
1.5
90
0.15
Unit
9.6
2.9
10
3.33
10.4
3.8
9
2.6
10
3.33
11
4
V
9.4
2.7
10
3.33
10.6
4
8.8
2.4
10
3.33
11.2
4.2
V
0.1
0.25
0.1
0.25
µA
4.8
1.45
5
1.67
5.2
1.9
4.5
1.1
5
1.67
5.6
2.2
V
0.4
0.5
0.7
0.9
1
0.4
0.5
0.7
2.0
1
µA
V
0.1
0.4
0.4
1
0.1
0.4
0.4
1.5
mA
0.1
0.4
2
2.5
0.1
0.05
0.15
0.5
2.2
0.1
0.4
2
2.5
0.3
0.25
0.25
0.75
2.5
13
3
0.25
0.2
12.5
13.3
3.3
12.75
2.75
0.4
0.35
12.5
13.3
3.3
V
20
100
20
100
180
80
480
200
180
80
480
200
100
100
200
200
100
100
300
300
0.5
0.5
V
nA
mV
ns
µs
1. Supply current when output is high is typically 1mA less.
2. Tested at VCC = +5V and VCC = +15V
3. This will determine the maximum value of RA + RB for +15V operation the max total is R = 20MΩ and for 5V operation the max total R = 3.5MΩ
4. Specified with trigger input high
5. No protection against excessive pin 7 current is necessary, providing the package dissipation rating will not be exceeded
6. Time measured from a positive going input pulse from 0 to 0.8x Vcc into the threshold to the drop from high to low of the output trigger is tied to threshold.
3/8
NE556- SA556-SE556
Figure 1 : Minimum Pulse Width Required for
Triggering
Figure 4 : Low Output Voltage versus Output
Sink Current
Figure 2 : Supply Current versus Supply Voltage
Figure 5 : Low Output Voltage versus Output
Sink Current
Figure 3 : Delay Time versus Temperature
Figure 6 : Low Output Voltage versus Output
Sink Current
4/8
NE556-SA556-SE556
Figure 7 : High Output Voltage Drop versus
Output
TYPICAL APPLICATION
50% DUTY CYCLE OSCILLATOR
VCC
4
6 (8)
14
(10)
(13) 1
1/2
NE556
SE556
Output
RA
51kW
22kW
(12) 2
(11) 3
5 (9)
Rs
0.01nF
C
7
Figure 8 : Delay Time versus Supply Voltage
t1 = 0.693 RA.C
RB – 2 RA
t 2 = [(RARB)/(RA+RB)]CLn --------------------------2 RB – RA
t1
1
f = ----------------- R B < --- RA ti
t1 + t2
2
t2
t1
Figure 9 : Propagation Delay versus Voltage
Level of Trigger Value
PULSE WIDTH MODULATOR
VCC
RA
4
Trigger
6 (8)
14
(10)
(13) 1
1/2
NE556
SE556
Output
(12) 2
(11) 3
5 (9)
C
7
MODULATION
INPUT
5/8
NE556- SA556-SE556
TONE BURST GENERATOR
For a tone burst generator the first timer is used as a monostable and determines the tone duration when
triggered by a positive pulse at pin 6. The second timer is enabled by the high output or the monostable.
It is connected as an astable and determines the frequency of the tone.
Reset
Rt
Vcc
4
5
10
Output
Reset
Trigger
6
Trigger
1
13
Control
3
Threshold
Ground
t
12 Threshold
8 Trigger
Output
11 Control
9
Ground
0.01m F
T = 1.1 R
RB
1/2
NE556
SE556
2
C1
RA
Discharge
1/2
NE556
SE556
Discharge
+15V
14
14
.C1
f=
C2
0.01m F
Ground
1.44
R A + 2R B ) C
MONOSTABLE OPERATION
ASTABLE OPERATION
VCC
VCC
RL
(10)
6 (8)
Trigger
RL
RA
4
RA
4
14
14
(10)
(13) 1
1/2
NE556
SE556
5 (9)
Output
(13) 1
1/2
NE556
SE556
RB
(12)
(12)
Output
5 (9)
RL
7
(11)
2
RL
(11)
7
3
10nF
C
3
2
(8)
6
C
0.01nF
Operating frequency
T = 1.1 R A .C
1.44
f=
R A + 2R B ) C
t1 = 0.693 (RA + RB) C Output High
t2 = 0.693 RBC Output Low
t2
t1
6/8
NE556-SA556-SE556
PACKAGE MECHANICAL DATA
Plastic DIP-14 MECHANICAL DATA
mm.
inch
DIM.
MIN.
a1
0.51
B
1.39
TYP
MAX.
MIN.
TYP.
MAX.
0.020
1.65
0.055
0.065
b
0.5
0.020
b1
0.25
0.010
D
20
0.787
E
8.5
0.335
e
2.54
0.100
e3
15.24
0.600
F
7.1
0.280
I
5.1
0.201
L
Z
3.3
1.27
0.130
2.54
0.050
0.100
P001A
7/8
NE556- SA556-SE556
PACKAGE MECHANICAL DATA
SO-14 MECHANICAL DATA
DIM.
mm.
MIN.
TYP
A
a1
inch
MAX.
MIN.
TYP.
1.75
0.1
0.2
a2
0.003
0.007
0.46
0.013
0.018
0.25
0.007
1.65
b
0.35
b1
0.19
C
MAX.
0.068
0.064
0.5
0.010
0.019
c1
45˚ (typ.)
D
8.55
8.75
0.336
E
5.8
6.2
0.228
e
1.27
e3
0.344
0.244
0.050
7.62
0.300
F
3.8
4.0
0.149
G
4.6
5.3
0.181
0.208
L
0.5
1.27
0.019
0.050
M
S
0.68
0.157
0.026
8 ˚ (max.)
PO13G
Information furnished is believed to be accurate and reliable. However, STMicroelectronics assumes no responsibility for the
consequences of use of such information nor for any infringement of patents or other rights of third parties which may result from
its use. No license is granted by implication or otherwise under any patent or patent rights of STMicroelectronics. Specifications
mentioned in this publication are subject to change without notice. This publication supersedes and replaces all information
previously supplied. STMicroelectronics products are not authorized for use as critical components in life support devices or
systems without express written approval of STMicroelectronics.
The ST logo is a registered trademark of STMicroelectronics
© 2003 STMicroelectronics - All Rights Reserved
STMicroelectronics GROUP OF COMPANIES
Australia - Brazil - China - Finland - France - Germany - Hong Kong - India - Italy - Japan - Malaysia - Malta - Morocco
Singapore - Spain - Sweden - Switzerland - United Kingdom
http://www.st.com
8/8
Was this manual useful for you? yes no
Thank you for your participation!

* Your assessment is very important for improving the work of artificial intelligence, which forms the content of this project

Download PDF

advertising