LM556 DATASHEET PDF

Hi, built this timer-flasher many times with a NE, always worked. Put a LM in its place and works perfectly. Never had to do this before, but put a 0. I thought NE and LM were interchangeable.

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LM Dual Timer. March Dual Timer. General Description. The LM Dual timing circuit is a highly stable controller ca- pable of producing accurate time delays or oscillation.

The is a dual Timing is provided by an external resistor and capacitor for each timing function. The two timers oper- ate independently of each other sharing only V C C and ground. The circuits may be triggered and reset on falling waveforms. The output structures may sink or source. Timing from microseconds through hours. Operates in both astable and monostable modes. Replaces two timers. Adjustable duty cycle. Output can source or sink mA. Output and supply TTL compatible. Temperature stability better than 0.

Normally on and normally off output. Precision timing. Pulse generation. Sequential timing. Time delay generation. Pulse width modulation. Pulse position modulation. Linear ramp generator. Connection Diagram. Ordering Information. Top View. Part Number. Package Marking. Media Transport. NSC Drawing. Schematic Diagram. Absolute Maximum Ratings Note 1. Supply Voltage Power Dissipation Note 2. Operating Temperature Ranges. Electrical Characteristics. Storage Temperature Range.

Infrared 15 Seconds. Supply Voltage. Supply Current Each Timer Section. Timing Error, Monostable. Initial Accuracy. Drift with Temperature. Accuracy over Temperature.

Drift with Supply. Timing Error, Astable. Trigger Voltage. Trigger Current. Reset Voltage. Reset Current. Threshold Current. Control Voltage Level and Threshold Voltage. Pin 1, 13 Leakage Output High. Pin 1, 13 Sat. Note 7. Output Low. Output Voltage Drop Low. Electrical Characteristics Continued. Output Voltage Drop High. Rise Time of Output.

Fall Time of Output. Note 8. Note 1: Absolute Maximum Ratings indicate limits beyond which damage to the device may occur. Note 5: As reset voltage lowers, timing is inhibited and then the output goes low.

Note 7: No protection against excessive pin 1, 13 current is necessary providing the package dissipation rating will not be exceeded. Note 8: Matching characteristics refer to the difference between performance characteristics of each timer section. Typical Performance Characteristics. Minimum Pulse Width Required for Triggering. Supply Current vs. Supply Voltage Each Section. Typical Performance Characteristics Continued. High Output Voltage vs.

Output Source Current. Low Output Voltage vs. Output Sink Current. Output Propagation Delay vs. Voltage Level of Trigger Pulse. Discharge Transistor Pin 1, 13 Voltage vs. Sink Current.

Physical Dimensions inches millimeters unless otherwise noted. As used herein:. Life support devices or systems are devices or systems which, a are intended for surgical implant into the body, or b support or sustain life, and whose failure to perform when properly used in accordance with instructions for use provided in the labeling, can be reasonably expected to result in a significant injury to the user.

A critical component is any component of a life support device or system whose failure to perform can be reasonably expected to cause the failure of the life support device or system, or to affect its safety or effectiveness. National Semiconductor Corporation Americas Tel: National Semiconductor. Japan Ltd. Tel: Fax: Email: support nsc. Email: ap. National does not assume any responsibility for use of any circuitry described, no circuit patent licenses are implied and National reserves the right at any time without notice to change said circuitry and specifications.

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LM556 Datasheet

Similar to the LM IC , LM 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. Open collector output which discharges a capacitor between intervals in phase with output. The 6 I amplitude of the voltage applied to this terminal is responsible for the set state of the flip-flop. Controls the threshold and trigger levels. It determines the pulse width of the output 5 Voltage I waveform.

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LM556 Timer. Datasheet pdf. Equivalent

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