LM556 Datasheet | National Semiconductor

Description The LM556 Dual timing circuit is a highly stable controller capable of producing accurate time delays or oscillation. The 556 is a dual 555. Timing is provided by an external resistor and capacitor for each timing function. The two timers operate independently of each other sharing only VCC and ground. The circuits may be triggered and reset on falling waveforms. The output structures may sink or source 200m A. Features n n n n n n n n n Direct replacement for SE556/NE556 Timing from microseconds through hours Operates in both astable and monostable modes Replaces two 555 timers Adjustable duty cycle Output can source or sink 200m A Output and supply TTL patible Temperature stability better than 0.005% per ˚C Normally on and normally off output Applications n n n n n n n Precision timing Pulse generation Sequential timing Time delay generation Pulse width modulation Pulse position modulation Linear ramp generator Connection Diagram Dual-In-Line, Small Outline Packages DS007852-1 Top View Ordering Information Package 14-Pin SOIC 14-Pin MDIP Part Number LM556CM LM556CMX LM556CN Package Marking LM556CM LM556CM LM556CN Media Transport Rails 2.5k Units Tape and Reel Rails NSC Drawing M14A N14a © 2000 National Semiconductor Corporation DS007852 .national. Schematic Diagram DS007852-2 .national. Absolute Maximum Ratings (Note 1) If Military/Aerospace specified devices are required, please contact the National Semiconductor Sales Office/ Distributors for availability and specifications. Supply Voltage Power Dissipation (Note 2) LM556CM LM556CN Operating Temperature Ranges LM556C +18V 410 m W 1620 m W 0˚C to +70˚C Storage Temperature Range - 65˚C to +150˚C Soldering Information Dual-In-Line Package Soldering (10 Seconds) 260˚C Small Outline Packages Vapor Phase (60 Seconds) 215˚C Infrared (15 Seconds) 220˚C See AN-450 “Surface Mounting Methods and Their Effect on Product Reliability” for other methods of soldering surface mount...