SE555DT ,General purpose single bipolar timerAbsolute maximum ratingsSymbol Parameter Value UnitV Supply voltage 18 VCCI Output current (sink & ..
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SE555DT
General purpose single bipolar timer
January 2012 Doc ID 2182 Rev 6 1/20
NE555
SA555 - SE555General-purpose single bipolar timers
Features Low turn-off time Maximum operating frequency greater than
500 kHz Timing from microseconds to hours Operates in both astable and monostable
modes Output can source or sink up to 200 mA Adjustable duty cycle TTL compatible Temperature stability of 0.005% per °C
DescriptionThe NE555, SA555, and SE555 monolithic timing
circuits are highly stable controllers capable of
producing accurate time delays or oscillation. In
the time delay mode of operation, the time is
precisely controlled by one external resistor and
capacitor. For a stable operation as an oscillator,
the free running frequency and the duty cycle are
both accurately controlled with two external
resistors and one capacitor.
The circuit may be triggered and reset on falling
waveforms, and the output structure can source
or sink up to 200 mA.
Schematic diagrams NE555 - SA555 - SE5552/20 Doc ID 2182 Rev 6
1 Schematic diagrams
Figure 1. Block diagram
Figure 2. Schematic diagram
NE555 - SA555 - SE555 Absolute maximum ratings and operating conditionsDoc ID 2182 Rev 6 3/20
Absolute maximum ratings and operating conditions
Table 1. Absolute maximum ratings Short-circuits can cause excessive heating. These values are typical. Human body model: a 100 pF capacitor is charged to the specified voltage, then discharged through a
1.5 kΩ resistor between two pins of the device. This is done for all couples of connected pin combinations
while the other pins are floating. Machine model: a 200 pF capacitor is charged to the specified voltage, then discharged directly between
two pins of the device with no external series resistor (internal resistor < 5 Ω). This is done for all couples of
connected pin combinations while the other pins are floating. Charged device model: all pins and the package are charged together to the specified voltage and then
discharged directly to the ground through only one pin. This is done for all pins.
Table 2. Operating conditions
Electrical characteristics NE555 - SA555 - SE5554/20 Doc ID 2182 Rev 6
3 Electrical characteristics Table 3. Tamb = +25° C, VCC = +5 V to +15 V (unless otherwise specified)
NE555 - SA555 - SE555 Electrical characteristics
Doc ID 2182 Rev 6 5/20 Tested at VCC = +5 V and VCC = +15V. This will determine the maximum value of RA + RB for 15 V operation. The maximum total (RA + RB) is 20 MΩ for +15V
operation and 3.5 MΩ for +5 V operation. Specified with trigger input high. No protection against excessive pin 7 current is necessary, providing the package dissipation rating is not exceeded. Time measured from a positive pulse (from 0 V to 0.8x VCC) on the threshold pin to the transition from high to low on the
output pin. Trigger is tied to threshold.
Table 3. Tamb = +25° C, VCC = +5 V to +15 V (unless otherwise specified) (continued)
