www.fairchildsemi.com LM556/NE556 Dual Timer Features Description • • • • • • • The LM556/NE556 series dual monolithic timing circuits are a highly stable controller capable of producing accurate time delays or oscillation. The LM556/NE556 is a dual LM555. Timing is provided 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 200mA. Replaces Two LM555/NE556 Timers Operates in Both Astable And Monostable Modes High Output Current TTL Compatible Timing From Microsecond To Hours Adjustable Duty Cycle Temperature Stability Of 0.005% Per °C Applications • • • • • • • • • • Precision Timing Pulse Shaping Pulse Width Modulation Frequency Division Traffic Light Control Sequential Timing Pulse Generator Time Delay Generator Touch Tone Encoder Tone Burst Generator 14-DIP 14-SOP 1 1 Internal Block Diagram Rev. 1.0.0 ©2001 Fairchild Semiconductor Corporation LM556/NE556 Absolute Maximum Ratings (TA = 25°°C) Parameter Value Unit VCC 16 V TLEAD 300 °C PD 600 mW Operating Temperature Range LM556/NE556 TOPR 0 ~ + 70 °C Storage Temperature Range TSTG - 65 ~ + 150 °C Supply Voltage Lead Temperature (soldering 10sec) Power Dissipation 2 Symbol LM556/NE556 Electrical Characteristics (TA = 25°C, VCC = 5 ~ 15V, unless otherwise specified) Parameter Supply Voltage Symbol VCC Conditions - Supply Current *1(two timers) (low state) ICC VCC = 5V, RL = ∞ VCC = 15V, RL = ∞ Timing Error *2(monostable) Initial Accuracy Drift with Temperature Drift with Supply Voltage ACCUR ∆t/∆T ∆t/∆VCC RA = 2KΩ to 100KΩ C = 0.1µF T = 1.1RC Control Voltage Threshold Voltage Units V - 5 16 12 30 mA mA - 0.75 50 0.1 - % ppm/°C %/V 9.0 10.0 11.0 V VTH VCC = 5V VCC = 15V 2.6 8.8 3.33 10.0 4.0 11.2 V V VCC = 5V 2.4 3.33 4.2 V ITH VTR VCC = 15V VCC = 5V VTR = 0V Trigger Current ITR Reset Voltage*5 VRST Reset Current IRST Rise Time of Output Fall Time of Output Max. 16 VCC = 15V Threshold Current*3 High Output Voltage Typ. - VC Trigger Voltage Low Output Voltage Min. 4.5 VOL VOH - - 30 250 nA 4.5 1.1 5.0 1.6 5.6 2.2 V V - 0.01 2.0 µA - 0.4 0.6 1.0 V - - 0.03 0.6 mA 0.1 0.4 2.0 2.5 0.25 0.75 3.2 0.25 0.15 0.35 0.25 V - V VCC = 15V ISINK = 10mA ISINK = 50mA ISINK = 100mA ISINK = 200mA VCC = 5V ISINK = 8mA ISINK = 5mA - VCC = 15V ISOURCE = 200mA ISOURCE = 100mA 12.75 12.5 13.3 VCC = 5V ISOURCE = 100mA 2.75 3.3 - V V tR tF - - 100 100 300 300 ns ns Discharge Leakage Current ILKG - - 10 100 nA Matching Characteristics*4 Initial Accuracy Drift with Temperature Drfit with Supply Voltage ACCUR ∆t/∆T ∆t/∆VCC - - 1.0 10 0.2 2.0 % ppm/°C %/V Timing Error (astable)*2 Initial Accuracy Drift with Temperature Drift with Supply Voltage ACCUR ∆t/∆T ∆t/∆Vcc VCC = 15V RA,RB = 1KΩ to 100KΩ C = 0.1µF - 2.25 150 0.3 0.5 - % ppm/°C %/V Notes: *1. Supply current when output is high is typically 1.0mA less at VCC = 5V *2. Tested at VCC = 5V and VCC = 15V *3. This will determine the maximum value of RA + RB for 15V operation. The maximum total R = 20MΩ, and for 5V operation the maximum total R = 6.6MΩ. *4. Matching characteristics refer to the difference between performance characteristics of each timer section in the monostable mode. *5. As reset voltage lowers, timing is inhibited and then the output goes low. 3 LM556/NE556 Mechanical Dimensions Package 2.08 ) 0.082 14-DIP 7.62 0.300 3.25 ±0.20 0.128 ±0.008 5.08 MAX 0.200 +0.10 0.25 –0.05 0~15° 4 +0.004 0.010 –0.002 1.50 ±0.10 0.059 ±0.004 #8 2.54 0.100 #7 19.40 ±0.20 0.764 ±0.008 #14 19.80 MAX 0.780 #1 0.46 ±0.10 0.018 ±0.004 ( 6.40 ±0.20 0.252 ±0.008 0.20 0.008 MIN 3.30 ±0.30 0.130 ±0.012 LM556/NE556 Mechanical Dimensions (Continued) Package 14-SOP 0.05 0.002 MIN 0.60 ±0.20 0.024 ±0.008 0.016 -0.002 -0.05 8° 3.95 ±0.20 0.156 ±0.008 5.72 0.225 +0.004 MAX0.10 MAX0.004 1.80 MAX 0.071 0~ +0.004 0.008 -0.002 0.20 +0.10 -0.05 6.00 ±0.30 0.236 ±0.012 +0.10 #8 0.406 #7 1.27 0.050 #14 8.70 MAX 0.343 #1 8.56 ±0.20 0.337 ±0.008 ( 0.47 ) 0.019 1.55 ±0.10 0.061 ±0.004 5 LM556/NE556 Ordering Information Product Number 6 Package LM556CN 14-DIP LM556CM 14-SOP NE556 14-DIP NE556D 14-SOP Operating Temperature 0 ~ + 70°C LM556/NE556 7 LM556/NE556 DISCLAIMER FAIRCHILD SEMICONDUCTOR RESERVES THE RIGHT TO MAKE CHANGES WITHOUT FURTHER NOTICE TO ANY PRODUCTS HEREIN TO IMPROVE RELIABILITY, FUNCTION OR DESIGN. FAIRCHILD DOES NOT ASSUME ANY LIABILITY ARISING OUT OF THE APPLICATION OR USE OF ANY PRODUCT OR CIRCUIT DESCRIBED HEREIN; NEITHER DOES IT CONVEY ANY LICENSE UNDER ITS PATENT RIGHTS, NOR THE RIGHTS OF OTHERS. LIFE SUPPORT POLICY FAIRCHILD’S PRODUCTS ARE NOT AUTHORIZED FOR USE AS CRITICAL COMPONENTS IN LIFE SUPPORT DEVICES OR SYSTEMS WITHOUT THE EXPRESS WRITTEN APPROVAL OF THE PRESIDENT OF FAIRCHILD SEMICONDUCTOR CORPORATION. As used herein: 1. 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 (c) 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 of the user. 2. A critical component in 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. www.fairchildsemi.com 5/22/01 0.0m 001 Stock#DSxxxxxxxx 2001 Fairchild Semiconductor Corporation