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NE556_98

GENERAL PURPOSE DUAL BIPOLAR TIMERS

STMicroelectronics 

NE556/SA556/SE556

ELECTRICAL CHARACTERISTICS (continued)

Symbol

Parameter

SE556

Min. Typ. Max.

NE556 - SA556

Min. Typ. Max.

Unit

Idis(off) Discharge Pin Leakage Current

(output high) (Vdis = 10V)

20

100

20

100

nA

Vdis(sat)

Discharge pin Saturation Voltage

(output low) - (note 5)

VCC = +15V, Idis = 15mA

VCC = +5V, Idis = 4.5mA

180 480

80

200

mV

180 480

80

200

tr Output Rise Time

tf Output Fall Time

100 200

100 200

100 300

ns

100 300

toff

Notes :

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

0.5

0.5

µs

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

4/9

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