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NE556_98

GENERAL PURPOSE DUAL BIPOLAR TIMERS

STMicroelectronics 

NE556/SA556/SE556

OPERATING CONDITIONS

Symbol

VCC

Vth, Vtrig, Vcl, Vreset

Parameter

Supply Voltage

Maximum Input Voltage

SE556

4.5 to 18

VCC

NE556 - SA556

4.5 to 18

VCC

Unit

V

V

ELECTRICAL CHARACTERISTICS

Tamb = +25oC, VCC = +5V to +15V (unless otherwise specified)

Symbol

Parameter

SE556

NE556 - SA556

Unit

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

ICC Supply Current (RL ∞) (- note 1) - (2 timers)

Low State VCC = +5V

VCC = +15V

High State VCC = 5V

6

10

20

24

4

mA

6

12

20 30

4

Timing Error (monostable)

(RA = 2k to 100kΩ, C = 0.1µF)

Initial Accuracy - (note 2)

Drift with Temperature

Drift with Supply Voltage

0.5

2

30

100

0.05 0.2

1

3

%

50

ppm/°C

0.1 0.5 %/V

Timing Error (astable)

(RA, RB = 1kΩ to 100kΩ, C = 0.1µF,

VCC = +15V)

Initial Accuracy - (note 2)

1.5

Drift with Temperature

90

Drift with Supply Voltage

0.15

2.25

%

150

ppm/°C

0.3

%/V

VCL Control Voltage level

VCC = +15V

VCC = +5V

V

9.6

10 10.4

9

10 11

2.9 3.33 3.8

2.6 3.33 4

Vth Threshold Voltage

VCC = +15V

VCC = +5V

Ith Threshold Current - (note 3)

Vtrig Trigger Voltage

VCC = +15V

VCC = +5V

Itrig Trigger Current (Vtrig = 0V)

V

9.4

10

10.6 8.8

10 11.2

2.7 3.33

4

2.4 3.33 4.2

0.1 0.25

0.1 0.25 µA

V

4.8

5

5.2

4.5

5

5.6

1.45 1.67 1.9

1.1 1.67 2.2

0.5

0.9

0.5 2.0 µA

Vreset Reset Voltage - (note 4)

0.4

0.7

1

0.4

0.7

1

V

Ireset

Reset Current

Vreset = +0.4V

Vreset = 0V

0.1

0.4

0.4

1

mA

0.1 0.4

0.4 1.5

VOL Low Level Output Voltage

VCC = +15V, IO(sink) = 10mA

IO(sink) = 50mA

IO(sink) = 100mA

IO(sink) = 200mA

VCC = +5V, IO(sink) = 8mA

IO(sink) = 5mA

0.1 0.15

0.4

0.5

2

2.2

2.5

0.1 0.25

0.05 0.2

V

0.1 0.25

0.4 0.75

2

2.5

2.5

0.3 0.4

0.25 0.35

VOH High Level Output Voltage

VCC = +15V, IO(source) = 200mA

IO(source) = 100mA

VCC = +5V, IO(source) = 100mA

V

12.5

12.5

13 13.3

12.75 13.3

3

3.3

2.75 3.3

Notes :

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.

3/9

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