The LM556 IC is the dual LM555 IC, meaning the LM556 has two timers inside it.?Similar to the?LM555 IC, LM556 can also be used for all those applications additionally, since this works with CMOS technology, we can have two timers inside a single package with improved characteristics.
LM556 Pin Configuration
|Pin Number||Pin Name||Description|
|1,13||Discharge||Open collector output which discharges a capacitor between intervals (in phase with output). 7 I?toggle the output from high to low when the voltage reaches 2/3 of the supply voltage|
|2,12||Threshold||Compares the voltage applied to the terminal with a reference voltage of 2/3 Vcc. The 6 I amplitude of the voltage applied to this terminal is responsible for the set state of the flip-flop|
|3,11||Control Voltage||Controls the threshold and trigger levels. It determines the pulse width of the output 5 Voltage I waveform. An external voltage applied to this pin can also be used to modulate the output waveform|
|4,10||Reset||A negative pulse applied to this pin to disable or reset the timer. When not used for reset 4 I purposes, it should be connected to VCC to avoid false triggering|
|5,9||Out||This pin is normally connected to load as it is the only pin with output-driven waveform|
|6,8||Trigger||Responsible for the transition of the flip-flop from set to reset. The output of the timer depends 2 I on the amplitude of the external trigger pulse applied to this pin|
|7||Ground||Ground Reference Voltage 0V|
|14||Vcc||Supply Voltage (Typical = 5V, Maximum = 18V)|
- Two precision Timers in one single package
- Typical operating voltage is +5V, can withstand a maximum of +18V.
- The source/sink current of the output pin is 200mA
- Supply Current: 10mA
- Operating Temperature: 0 to 70?C
- Available in 14-pin SOIC, and MDIP packages
Note:?Complete Technical Details can be found in?the?LM556 datasheet?given at the end of this page.
Other Dual Timer IC:?NE556
Where to use the LM556 IC
The LM556 IC is the dual LM555 IC, meaning the LM556 has two timers inside it.?Similar to the LM555 IC, LM556 can also be used for all those applications additionally, since this works with CMOS technology, we can have two timers inside a single package with improved characteristics.
So if you are looking for a modern replacement for the?555 Timer IC, then LM556 might be the right choice for you.