SA555D datasheet(2/18 Pages) ARTSCHIP

2 / 18 page

NE555,SA555,SE555

PRECISION TIMERS

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FUNCTION TABLE

RESET

TRIGGER

VOLTAGE

THRESHOLD

VOLTAGE

OUTPUT

DISCHARGE

SWITCH

Low

Irrelevant

Low

High

<1/3 VDD

Irrelevant

High

Off

High

>1/3 VDD

>2/3 VDD

Low

High

>1/3 VDD

<2/3 VDD

As previously established

Voltage levels shown are nominal.

Function block diagram

Pin numbers shown are for the D,JG,P,PS,and PW packages.

NOTE A:

RESET can override TRIG, which can override THRES.

Absolute maximum ratings over operating free-air temperature range (unless otherwise note) †

Supply voltage, Vcc (see Note 1)…………………………………………………………………………………………………18V

Input voltage (CONT, RESET, THRES, and TRING)…………………………………………………………………………….Vcc

Output Current………………………………………………………………………………………………………………… ±225mA

Package thermal impedance, ӨJA (see Notes 2 and 3): D package………………………………………………………97℃/W

P package……………………………………………………….85℃/W

PS package………………………………………………………95℃/W

PW package……………………………………………………..149℃/W

Package thermal impedance, ӨJC (see Notes 4 and 5): FK package…………………………………………………….5.61℃/W

JG package…………………………………………………….14.5℃/W

Operating virtual junction temperature, TJ………………………………………………………………………………………..150℃

Case temperature for 60 seconds: FK package…………………………………………………………………………………260℃

Lead temperature 1,6mm (1/16inch) from case for 60 seconds: JG package………………………………………………...300℃

Storage temperature range, Tstg…………………………………………………………………………………………-65℃ to 150℃

†Stresses beyond those listed under “absolute maximum ratings” may cause permanent damage to the device. These are stress

ratings only, and functional operation of the device at these or any other conditions beyond those indicated under “recommended

operating conditions” is not implied. Exposure to absolute-maximum-rated conditions for extended periods may affect device

reliability.

Notes:

1. All voltage values are with respect to GND.

2. Maximum power dissipation is a function of TJ(max). ӨJA, and TA. The maximum allowable power dissipation at any

allowable ambient temperature is PD=(TJ(max)-TA)/ ӨJA. Operating at the absolute maximum TJ of 150℃ can affect reliability.

3. The package thermal impedance is calculated in accordance with JESD 51-7.

4. Maximum power dissipation is a function of TJ(max), ӨJC, and TC. The maximum allowable power dissipation at any

allowable case temperature is PD=(TJ(max)-Tc)/ ӨJA. Operating at the absolute maximum TJ of 150℃ can affect reliability.

5. The package thermal impedance is calculated in accordance with MIL-STD-883.

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