SA555 datasheet(4/10 Pages) STMICROELECTRONICS

4 / 10 page

ELECTRICAL CHARACTERISTICS (continued)

Symbol

Parameter

SE555

NE555 - SA555

Unit

Min.

Typ.

Max.

Min.

Typ.

Max.

Idis(off)

Discharge Pin Leakage Current

(output high) (Vdis = 10V)

100

Vdis(sat)

Discharge pin Saturation Voltage

(output low) - (note 5)

VCC = +15V, Idis = 15mA

VCC = +5V, Idis = 4.5mA

180

480

200

180

480

200

Output Rise Time

Output Fall Time

100

200

100

300

toff

Turn off Time - (note 6) (Vreset =VCC)

0.5

µs

Notes :

5. No protection against excessive Pin 7 current is necessary, providing the package dissipation rating will not be exceeded.

6. Time mesaured 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 treshold.

Figure 1 : Minimum Pulse Width Required for

Trigering

Figure 2 : Supply Current versus Supply Voltage

Figure 3 : Delay Time versus Temperature

Figure 4 : Low Output Voltage versus Output

Sink Current

NE555/SA555/SE555

4/10

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