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NE556 Datasheet(PDF) 2 Page - STMicroelectronics

Part No. NE556
Description  GENERAL PURPOSE DUAL BIPOLAR TIMERS
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Maker  STMICROELECTRONICS [STMicroelectronics]
Homepage  http://www.st.com
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 2 page
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NE556- SA556-SE556
2/8
BLOCK DIAGRAM
SCHEMATIC DIAGRAM
ABSOLUTE MAXIMUM RATINGS
OPERATING CONDITIONS
THRESHOLD
COMP
5kW
5kW
5kW
TRIGGER
R
FLIP-FLOP
S
Q
DISCHARGE
OUT
INHIBIT/
RESET
RESET
COMP
S
+
CONTROL VOLTAGE
VCC
1/2 NE556
OUTPUT
CONTROL
VOLTAGE
THRESHOLD
COMPARATOR
VCC
R1
4.7kW
R2
830W
Q5
Q6
Q7
Q8
Q9
R3
4.7kW
R4
1kW
R8
5kW
Q1
Q2
Q3
Q4
Q10
Q11 Q12
Q13
THRESHOLD
TRIGGER
RESET
DISCHARGE
G N D
2
4
7
1
Q14
Q15
R5
10kW
R6
100kW
R7
100kW
R10
5kW
Q17
Q16
Q18
R9
5kW
D2
R16
100W
R15
4.7kW
R14
220W
Q24
Q23
R17
4.7kW
3
Q22
R13
D1
Q19
Q20
Q21
R12
6.8kW
5
TRIGGER COMPARATOR
FLIP FLOP
R11
5kW
3.9kW
Symbol
Parameter
Value
Unit
VCC
Supply Voltage
18
V
Tj
Junction Temperature
150
°C
Tstg
Storage Temperature Range
-65 to 150
°C
Symbol
Parameter
Value
Unit
VCC
Supply Voltage
NE556
SA556
SE556
4.5 to 16
4.5 to 16
4.5 to 18
V
Vth, Vtrig, Vcl, Vreset
Maximum Input Voltage
VCC
V
Toper
Operating Free Air Temperature Range
for NE556
for SA556
for SE556
0 to 70
-40 to 105
-55 to 125
°C




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