NE556N STMicroelectronics, NE556N Datasheet - Page 9

• Manufacturer Part Number: NE556N
• Description: IC TIMER DUAL BIPOLAR 14 DIP
• Manufacturer: STMicroelectronics
• Type: 555 Type, Timer/Oscillator (Dual)r

Specifications of NE556N

• Frequency: 500kHz
• Voltage - Supply: 4.5 V ~ 16 V
• Current - Supply: 20mA
• Operating Temperature: 0°C ~ 70°C
• Package / Case: 14-DIP (0.300", 7.62mm)
• Number Of Internal Timers: 2
• Supply Voltage (max): 16 V
• Supply Voltage (min): 4.5 V
• Maximum Operating Temperature: + 70 C
• Minimum Operating Temperature: 0 C
• Mounting Style: Through Hole
• Application: 50% Duty cycle oscillator, pulse width modulator
• Current, Supply: 6 mA @ 5 V, 20 mA @ 15 V, 4 mA @ 5 V
• Number Of Pins: 14
• Package Type: DIP14
• Temperature, Operating: 0 °C
• Temperature, Storage: -65 to 150 °C
• Time, Fall, Output: 100 ns (Typ.)
• Time, Rise, Output: 100 ns (Typ.)
• Voltage, Control: 10 V @ Vcc ≥+15 V, 3.33 V @ Vcc ≥+5 V
• Voltage, Output, High Level: 12.5 V @ 200 mA, 13.3 V @ 100 mA, 3.3 V @ 100 mA
• Voltage, Output, Low Level: 0.1 V @ 10 mA, 0.4 V @ 50 mA, 2 V @ 100 mA, 2.5 V @ 200 mA, 0.3 V @ 8 mA, 0.25 V @ 5 mA
• Voltage, Supply: 18 V
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Count: -
• Lead Free Status / Rohs Status: Lead free / RoHS Compliant
• Other names: 497-1965-5

NE556 - SA556 - SE556
Figure 14. Tone burst generator
For a tone burst generator the first timer is used as a monostable and determines the tone
duration when triggered by a positive pulse at pin 6. The second timer is enabled by the high
output or the monostable. It is connected as an astable and determines the frequency of the
tone.
Figure 15. Monostable operation
t
D
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t
d
V
tp t
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t
tp t
t
tp t
t
Application information
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