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SA555 Scheda tecnica(PDF) 2 Page - Diodes Incorporated

Il numero della parte SA555
Spiegazioni elettronici  PRECISION TIMER
PDF  14 Pages
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Produttore elettronici  DIODES [Diodes Incorporated]
Homepage  http://www.diodes.com
Logo DIODES - Diodes Incorporated

SA555 Scheda tecnica(HTML) 2 Page - Diodes Incorporated

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NE555/SA555/NA555
Document number: DS35112 Rev. 5 - 2
2 of 14
www.diodes.com
February 2021
© Diodes Incorporated
NE555
Pin Descriptions
Pin Name
Pin Number
Description
GND
1
Ground
TRIG
2
Trigger set 1/3VCC
OUT
3
Timer output
RESET
4
Reset active low
CONT
5
External adjustment of internal threshold and trigger voltages
THRES
6
Threshold set to 2/3 VCC
DISCH
7
Low impedance discharge path
VCC
8
Chip supply voltage
Functional Block Diagram
RESET can override TRIG, which can override THRESH
Functional Table
RESET
Nominal Trigger
Voltage
Threshold
Voltage
Output
Discharge
Switch
Low
Irrelevant
Irrelevant
Low
On
High
<1/3VCC
Irrelevant
High
Off
High
>1/3VCC
>2/3VCC
Low
On
High
>1/3VCC
<2/3VCC
As previously established
VCC CONT
RESET
THRES
TRIG
GND
DISCH
OUT
1
2
3
4
5
6
7
8
R1
R2
S
O



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