SGS Thomson Microelectronics NE556N, NE556, NE556D, SA556, SA556D Datasheet
...
NE556
GENERAL PURPOSE DUAL BIPOLAR TIMERS
.LOW TURN OFF TIME
.MAXIMUM OPERATING FREQUENCY
GREATERTHAN500kHz
.TIMINGFROMMICROSECONDSTO HOURS
.OPERATES IN BOTH ASTABLE AND
MONOSTABLEMODES
.HIGHOUTPUT CURRENT CAN SOURCE OR
SINK200mA
.ADJUSTABLE DUTYCYCLE
.TTL COMPATIBLE
.TEMPERATURESTABILITYOF 0.005%
DESCRIP T IO N
TheNE556 dual monolithictiming circuit is a highly
stablecontrollercapableofproducingaccuratetime
delaysor oscillation.In the time delaymode of operation,the time ispreciselycontrolledby oneexternalresistorand capacitor.For a stableoperationas
anoscillator,thefreerunningfrequencyandtheduty
cycleare both accuratelycontrolledwith two externalresistorsand one capacitor.Thecircuit maybe
triggered and reset on falling waveforms, and the
outputstructurecansourceor sink up to 200mA.
PER
o
C
N
DIP14
(PlasticPackage)
ORDER CODES
Part
Number
NE556 0
SA556 –40
SE556 –55
Temperature
SA556 - SE556
D
SO14
(PlasticMicropackage)
Pakcage
Range
o
C, 70oC ••
o
C, 105oC ••
o
C, 125oC ••
ND
PI N CO NNECT IONS (top v iew)
Discharge
Threshold
Control Voltage
Re s et
Output
Trigger
GND
July 1998
1
2
3
4
5
6
7
14
V
Discha rge
13
Threshold
12
Control Voltage
11
Re s et
10
Output
9
Trigger
8
CC
1/9
NE 556/SA556/ SE556
BLOCK DIAGRAM
THRES HOLD
CONTROL VOLTAGE
TRIGGER
+
V
CC
Ω
5k
COMP
Ω
5k
COMP
Ω
5k
R
FLIP-FLOP
S
INHIBIT/
RESET
Q
DISCHARGE
OUT
1/2 NE556
SCHE MATIC DIAGRAM
THRESHOLD
COMPARATOR
V
CC
Q5 Q6 Q7 Q8 Q9
THRESHOLD
TRIGGER
RESET
DISCHARGE
GND
Q1
2
4
7
Q14
1
4.7k
R1
Q2
Q15
RESET
R2
R3
830
Ω
Ω
Q3
R5
10kΩ
4.7k
Q4
Q10
100kΩR7100kΩ
Ω
R6
Q11 Q12
R4
1k
Ω
Q13
S
CONTROL
VOLTAGE
R8
5k
Ω
R9
5kΩ
Q16 Q18
R10
5kΩ
OUTPUT
5
R12
6.8k
Ω
Q20
Q23
100
R16
Q21
Q22
Ρ13
3.9kΩ
D1
R14
220Ω
R15
4.7kΩ
Ω
3
Q24
R11
5kΩ
Q19
R17
4.7k
Ω
D2
Q17
TRIGGER COMPARATOR FLIP FLOP
ABSOLUTE MAXIMUM RATINGS
Symbol Parameter Value Unit
Supply Voltage 18 V
V
cc
T
T
2/9
Operating Free Air Temperature Range for NE556
oper
for SA556
for SE556
Junction Temperature 150 °C
T
j
Storage Temperature Range – 65 to 150 °C
stg
0to70
–40 to 105
–55 to 125
°C
NE 556/SA556/ SE556
OPERATINGCONDITIONS
Symbol Parameter SE556 NE556 - SA556 Unit
V
CC
V
th,Vtrig,Vcl,Vreset
ELECTRICAL CHARACTERISTICS
= +25oC, VCC= +5V to +15V (unless otherwise specified)
T
amb
Symbol Parameter
I
V
V
V
I
V
V
Notes : 1. Supply current when output is high is typically 1mA less.
Supply Current (RL∞) (- note 1) - (2 timers)
CC
Low State V
High State V
Timing Error (monostable)
(R
A=
Initial Accuracy - (note 2)
Drift with Temperature
Drift with Supply Voltage
Timing Error (astable)
(R
A,RB
V
CC
Initial Accuracy - (note 2)
Drift with Temperature
Drift with Supply Voltage
Control Voltage level
CL
Threshold Voltage
V
th
Threshold Current - (note 3) 0.1 0.25 0.1 0.25 µA
I
th
Trigger Voltage
trig
Trigger Current (V
I
trig
Reset Voltage - (note 4) 0.4 0.7 1 0.4 0.7 1 V
reset
Reset Current
reset
Low Level Output Voltage
OL
V
CC
V
CC
High Level Output Voltage
OH
V
CC
V
CC
2. Tested at V
3. This willdetermine the maximum value of R
the max total R = 3.5MΩ.
4. Specified with trigger input high.
Supply Voltage 4.5 to 18 4.5 to 18 V
Maximum Input Voltage V
CC
V
CC
SE556 NE556 - SA556
Min. Typ. Max. Min. Typ. Max.
V
CC
CC
CC
= +5V
= +15V
=5V
20
6
4
10
24
6
20
4
2k to 100kΩ, C = 0.1µF)
0.5
30
0.05
2
100
0.2
1
50
0.130.5
=1kΩto 100kΩ, C = 0.1µF,
= +15V)
= +15V, I
= +5V, I
= +15V, I
= +5V, I
= +5V and VCC= +15V.
CC
1.5
90
0.15
= +15V
V
CC
= +5V
V
CC
= +15V
V
CC
= +5V
V
CC
= +15V
V
CC
= +5V
V
CC
= 0V) 0.5 0.9 0.5 2.0 µA
trig
= +0.4V
V
reset
=0V
V
reset
= 10mA
O(sink)
= 50mA
I
O(sink)
= 100mA
I
O(sink)
= 200mA
I
O(sink)
= 8mA
O(sink)
= 5mA
I
O(sink)
O(source)
I
O(source)
O(source)
= 200mA
= 100mA
= 100mA
A+RB
9.6
2.9
9.4
2.7
4.8
1.4551.67
13
3
for +15Voperation the max total is R = 20MΩ and for 5V operation
10
3.33
10
3.33
0.1
0.4
0.1
0.4
2
2.5
0.1
0.05
12.5
13.3
3.3
10.4
3.8
10.6
4
5.2
1.9
0.4
1
0.15
0.5
2.2
0.25
0.2
2.6103.33
8.8
2.4103.33
4.5
1.151.67
12.75
2.75
2.25
150
0.3
9
0.1
0.4
0.1
0.4
2
2.5
0.3
0.25
12.5
13.3
3.3
V
Unit
mA
12
30
%
ppm/°C
%/V
%
ppm/°C
%/V
V
11
4
V
11.2
4.2
V
5.6
2.2
mA
0.4
1.5
V
0.25
0.75
2.5
0.4
0.35
V
3/9
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