NE555B datasheet(3/5 Pages) FS

3 / 5 page

2016. 9. 28

3/5

Revision No : 0

Initial Error of

Timing Interval

(see Note 3)

monostable

(see Note 4)

Accur

TA =25°C

astable

(see Note 5)

Temperature

Coeﬃcient of

Timing Interval

monostable

∆t/T

TA=MIN to MAX

150

ppm /°C

150

500

astable

Supply Voltage

Sensitivity of

Timing Interval

monostable

∆t/∆Vcc

TA =25°C

0.1

0.5

%/V

astable

0.3

Output Pulse Rise Time

CL=15pF, TA=25°C

100

300

Output Pulse Fall Time

100

300

Notes:

1. This parameter inﬂuences the maximum value of the timing resistors RA and RB in the circuit on Fig 1. For example,

when VCC=5V, the maximum value is R=RA+RB=3.4 MΩ, and VCC=15V, the maximum value is 10 MΩ.

2. For conditions shown as MIN or MAX, use the appropriate value speciﬁed under recommended operating conditions.

3. Timing interval error is deﬁned as the diﬀerence between the measured value and the average value of a random

sample from each process run.

4. Values speciﬁed are for a device in a monostable circuit similar to Fig. 2, with component values as follow: RA=2KΩ to

100 KΩ, C=0.1µF.

5. Values speciﬁed are for a device in an astable circuit similar to Fig. 1, with component values as follow: RA, RB=1KΩ to

100 KΩ, C=0.1µF.

BLOCK DIAGRAM

NE555BF/BP

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