Datasheet NE556N, NE556, NE556D, SA556, SA556D Datasheet (SGS Thomson Microelectronics)

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

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

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

I

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

NE 556/SA556/ SE556

ELECTRICAL CHARACTERISTICS (continued)

Symbol Parameter

I

dis(off)

V

dis(sat)

Notes : 5. No protection against excessive Pin 7 current isnecessary, providing the package dissipation rating will notbe exceeded.

Discharge Pin Leakage Current (output high) (V

dis

= 10V)

Discharge pin Saturation Voltage (output low) - (note 5)

= +15V, I

V

CC

= +5V, I

V

CC

Output Rise Time

t

r

t

Output Fall Time

f

t

Turn off Time - (note 6) (V

off

6. Timemesaured from a positive going input pulse from 0 to 0.8x V output trigger istied to treshold.

dis

= 4.5mA

dis

= 15mA

reset=VCC

) 0.5 0.5 µs

Min. Typ. Max. Min. Typ. Max.

SE556 NE556 - SA556

20 100 20 100 nA

180

80

100 100

CC

480 200

200 200

into the threshold to the drop from high to low of the

180

80

100 100

480 200

300 300

Unit

mV

ns

Figure1 : MinimumPulseWidth Requiredfor

Figure 2 : SupplyCurrent versusSupplyVoltage

Trigering

Figure 3 : Delay Time versusTemperature Figure4 : LowOutputVoltageversus Output

SinkCurrent

4/9

NE 556/SA556/ SE556

Figure 5 : Low OutputVoltage versusOutput

SinkCurrent

Figure7 : HighOutput VoltageDrop versus

Output

Figure6 : LowOutputVoltageversusOutput

SinkCurrent

Figure8 : Delay Time versusSupply Voltage

Figure9 : PropagationDelay versusVoltage

Level of Trigger Value

5/9

NE 556/SA556/ SE556

TYP ICAL APPLIC ATI O N 50 % DUTY CYCLE OSCIL LATOR

V

CC

6

Output

5

t1= 0.693 RA.C t

= [(RARB)⁄ (R

2

1

f =

t

1+t2

RB<

(8)

(9)

4

(10)

+ R

A

B

1

R

A

2

1/2

NE556

SE556

7

)] CLn

ti

14

(13)

1

(12)

2

(11)

3



R

− 2R

B

− R



A



A



B



2R



t2

R

s

22k

0.01nF

PULSE WIDTH MODULATOR

V

CC

R

A

Ω

51k

Trigger

Ω

Output

C

4

(10)

6

(8)

14

(13)

1

1/2 NE556 SE556

(9)

5

7

MODULATION

(12)

(11)

INPUT

2

3

R

A

C

6/9

t1

NE 556/SA556/ SE556

TONE BURS T GENE RATOR

For a tone burst generatorthe first timer is usedas a monostable and determinesthe tonedurationwhen triggeredby a positive pulse at pin 6. Thesecondtimeris enabledby thehigh output os the monostable.It is connectedas anastableanddeterminesthefrequency of thetone.

Trigge r

6

Discharge

1

2

Thre shold

Res et

1/2 NE556 SE556

Ground

T=1.1R .C1

R

Trigge r

C1

t

MONOSTABLE OP E RATION

V

CC

R

L

4

Trigger

(10)

(8)

6

1/2 NE556 SE556

Vcc414

t

14

(13)

R

A

R

B

C2

Ground

+15V

0.01

Control

µ

F

5

Output

3

10

Res et

Output

14

Discharge

13

1/2 NE556 SE556

9

Ground

1.44

f=

R+2R)C

A

12

Thre shold

8

Trigge r

Control

11

µ

0.01

F

B

ASTABLE O PE RAT I ON

V

CC

R

A

1

L

4

(10)

14

(13)

1

1/2

Output

(9)

5

NE556 SE556

R

A

R

B

Output

t2

(12)

2

(8)

6

1.44

f=

R+2R)C

A

C

B

(12)

(9)5

(11)

7

R

L

2

3

10nF

C

R

L

(11)

7

3

0.01nF

Operating frequency

T=1.1R .C

A

=0.693(RA+RB) COutput High

t

1

t

=0.693RBC OutputLow

2

t1

7/9

NE 556/SA556/ SE556

PACKAG E MECHANICAL DATA

14 P I NS - PLASTIC DIP

Dimensions

a1 0.51 0.020

B 1.39 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 3.3 0.130 Z 1.27 2.54 0.050 0.100

Min. Typ. Max. Min. Typ. Max.

Millimeters Inches

8/9

PACKAG E MECHANICAL DATA

14 PINS - PLASTIC MICROPACKAGE (SO)

NE 556/SA556/ SE556

Dimensions

Min. Typ. Max. Min. Typ. Max.

Millimeters Inches

A 1.75 0.069

a1 0.1 0.2 0.004 0.008 a2 1.6 0.063

b 0.35 0.46 0.014 0.018

b1 0.19 0.25 0.007 0.010

C 0.5 0.020

c1 45

o

(typ.) D 8.55 8.75 0.336 0.334 E 5.8 6.2 0.228 0.244 e 1.27 0.050

e3 7.62 0.300

F 3.8 4.0 0.150 0.157 G 4.6 5.3 0.181 0.208 L 0.5 1.27 0.020 0.050

M 0.68 0.027

S8

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o

(max.)

 1998 STMicroelectronics – Printed in Italy – AllRights Reserved

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9/9

Datasheet NE556N, NE556, NE556D, SA556, SA556D Datasheet (SGS Thomson Microelectronics)

Specifications and Main Features

Frequently Asked Questions

User Manual