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| NE556 SA556 - SE556 GENERAL PURPOSE DUAL BIPOLAR TIMERS s LOW TURN OFF TIME s MAXIMUM OPERATING FREQUENCY GREATER THAN 500kHz s TIMING FROM MICROSECONDS TO HOURS s OPERATES IN BOTH ASTABLE AND MONOSTABLE MODES s HIGH OUTPUT CURRENT CAN SOURCE OR SINK 200mA N DIP14 (Plastic Package) s ADJUSTABLE DUTY CYCLE s TTL COMPATIBLE s TEMPERATURE STABILITY OF 0.005% PERC DESCRIPTION The NE556 dual monolithic timing circuit is a highly stable controller capable of producing accurate time delays or oscillation. In the time delay mode of operation, the time is precisely controlled by one external resistor and capacitor. For a stable operation as an oscillator, the free running frequency and the duty cycle are both accurately controlled with two external resistors and one capacitor. The circuit may be triggered and reset on falling waveforms, and the output structure can source or sink up to 200mA. ORDER CODE Package Part Number NE556 SA556 SE556 Temperature Range N 0C, 70C -40C, 105C -55C, 125C * * * D * * * D SO14 (Plastic Micropackage) PIN CONNECTIONS (top view) Discharge Threshold 1 2 14 13 12 11 10 9 8 VCC Discharge Threshold Control Voltage Reset Output Trigger Control Voltage 3 Reset Output Trigger GND 4 5 6 7 N = Dual in Line Package (DIP) D = Small Outline Package (SO) - also available in Tape & Reel (DT) June 2003 1/8 NE556- SA556-SE556 BLOCK DIAGRAM VCC+ 5kW THRESHOLD CONTROL VOLTAGE COMP R FLIP-FLOP 5kW COMP TRIGGER DISCHARGE Q OUT 1/2 NE556 S INHIBIT/ RESET 5kW RESET S SCHEMATIC DIAGRAM CONTROL VOLTAGE THRESHOLD COMPARATOR VCC R1 4.7kW R2 830W R3 4.7kW R4 R8 1kW 5kW 5 R12 6.8kW Q21 Q5 Q6 Q7 Q8 Q9 Q19 Q20 31R R11 5kW THRESHOLD Q1 Q2 Q3 Q11 Q12 TRIGGER 2 Q10 Q4 R9 5kW Q13 Q16 RESET DISCHARGE 4 7 Q14 GND 1 Q15 Q17 R5 10kW R6 100kW R7 100kW R10 5kW Q18 R16 100W R15 4.7kW D2 R17 4.7kW Q23 3.9kW D1 R14 220W Q24 3 Q22 OUTPUT TRIGGER COMPARATOR FLIP FLOP ABSOLUTE MAXIMUM RATINGS Symbol VCC Tj Tstg Supply Voltage Junction Temperature Storage Temperature Range Parameter Value 18 150 -65 to 150 Unit V C C OPERATING CONDITIONS Symbol Supply Voltage VCC Vth, Vtrig, Vcl, Vreset Toper Parameter NE556 SA556 SE556 Value 4.5 to 16 4.5 to 16 4.5 to 18 VCC 0 to 70 -40 to 105 -55 to 125 Unit V V C Maximum Input Voltage Operating Free Air Temperature Range for NE556 for SA556 for SE556 2/8 NE556-SA556-SE556 ELECTRICAL CHARACTERISTICS Tamb = +25C, VCC = +5V to +15V (unless otherwise specified) Symbol Parameter Supply Current (RL ) - note 1) (2 timers) Low Stage VCC = +5V VCC = +15V High State VCC = +5V Timing Error (monostable) (RA = 2k to 100k, C = 0.1F) Initial Accuracy - note 2) Drift with Temperature Drift with Supply Voltage Timing Error (astable) (RA, RB = 1k to 100k, C = 0.1F, VCC = +15V) Initial Accuracy - see note 2 Drift with Temperature Drift with Supply Voltage Control Voltage Level VCC = +15V VCC = +5V Threshold Voltage VCC = +15V VCC = +5V Threshold Current - note 3) Trigger Voltage VCC = +15V VCC = +5V Trigger Current (Vtrig = 0V) SE556 Min. Typ. 6 20 4 Max. 10 24 NE556 - SA556 Min. Typ. 6 20 4 Max. 12 30 Unit ICC mA 0.5 30 0.05 2 100 0.2 1 50 0.1 3 0.5 % ppm/C %/V 1.5 90 0.15 9.6 2.9 9.4 2.7 10 3.33 10 3.33 0.1 4.8 1.45 0.4 5 1.67 0.5 0.7 0.1 0.4 0.1 0.4 2 2.5 0.1 0.05 12.5 13.3 3.3 20 100 10.4 3.8 10.6 4 0.25 5.2 1.9 0.9 1 0.4 1 0.15 0.5 2.2 0.25 0.2 4.5 1.1 0.4 9 2.6 8.8 2.4 2.25 150 0.3 10 3.33 10 3.33 0.1 5 1.67 0.5 0.7 0.1 0.4 0.1 0.4 2 2.5 0.3 0.25 12.5 13.3 3.3 20 100 11 4 11.2 4.2 0.25 5.6 2.2 2.0 1 0.4 1.5 0.25 0.75 2.5 0.4 0.35 % ppm/C %/V V VCL Vth Ith Vtrig Itrig Vreset V A V A V mA Reset Voltage 4) Reset Current Vreset = +0.4V Ireset Vreset = 0V Low Level Output Voltage VCC = +15V IO(sink) = 10mA IO(sink) = 50mA IO(sink) = 100mA VOL IO(sink) = 200mA VCC = +5V IO(sink) = 8mA IO(sink) = 5mA High Level Output Voltage VCC = +15V IO(sink) = 200mA VOH IO(sink) = 100mA VCC = +5V IO(sink) = 100mA Discharge Pin Leakage Current Idis(off) (output high) (Vdis = 10V) Discharge pin Saturation Voltage (output low) - note 5) Vdis(sat) VCC = +15V, Idis = 15mA VCC = +5V, Idis = 4.5mA tr Output rise Time Output Fall Time tf toff Turn off Time - note 6) (Vreset = VCC) V 13 3 12.75 2.75 V nA 180 80 100 100 0.5 480 200 200 200 180 80 100 100 0.5 480 200 300 300 mV ns s 1. Supply current when output is high is typically 1mA less. 2. Tested at VCC = +5V and VCC = +15V 3. This will determine the maximum value of RA + RB for +15V operation the max total is R = 20M and for 5V operation the max total R = 3.5M 4. Specified with trigger input high 5. No protection against excessive pin 7 current is necessary, providing the package dissipation rating will not be exceeded 6. Time measured from a positive going input pulse from 0 to 0.8x Vcc into the threshold to the drop from high to low of the output trigger is tied to threshold. 3/8 NE556- SA556-SE556 Figure 1 : Minimum Pulse Width Required for Triggering Figure 4 : Low Output Voltage versus Output Sink Current Figure 2 : Supply Current versus Supply Voltage Figure 5 : Low Output Voltage versus Output Sink Current Figure 3 : Delay Time versus Temperature Figure 6 : Low Output Voltage versus Output Sink Current 4/8 NE556-SA556-SE556 Figure 7 : High Output Voltage Drop versus Output TYPICAL APPLICATION 50% DUTY CYCLE OSCILLATOR VCC 4 6 (8) (10) 14 (13) 1 RA 51kW Rs 22kW (12) 2 1/2 NE556 SE556 Output 5 (9) 7 (11) 3 0.01nF C Figure 8 : Delay Time versus Supply Voltage t1 = 0.693 RA.C RB - 2RA t2 = [(RARB)/(RA+RB)]CLn -------------------------2 RB - RA t1 1 f = ---------------- R B < -- RA ti t1 + t2 2 t2 t1 Figure 9 : Propagation Delay versus Voltage Level of Trigger Value PULSE WIDTH MODULATOR VCC RA 4 Trigger 6 (8) (10) 14 (13) 1 1/2 NE556 SE556 Output 5 (9) 7 (12) 2 (11) 3 C MODULATION INPUT 5/8 NE556- SA556-SE556 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. +15V Reset Rt Trigger Trigger 6 Discharge 1 2 Threshold C1 4 Vcc 14 5 Output 10 Reset 14 Discharge 13 1/2 NE556 SE556 Control 3 Output 9 Ground 0.01m F RA 1/2 NE556 SE556 RB 12 Threshold 8 Trigger 11 Control Ground 0.01m F C2 T = 1.1 R t .C1 f= 1.44 R A + 2R B ) C Ground MONOSTABLE OPERATION VCC RL 4 Trigger (10) 6 (8) ASTABLE OPERATION VCC RA 14 (13) 1 RL 4 (10) RA 14 (13) 1 1/2 NE556 SE556 (12) 2 Output 5 (9) 1/2 NE556 SE556 (12) 2 RB Output RL 5 (9) 7 (11) 3 RL 7 (11) 3 0.01nF (8) 6 10nF C C Operating frequency T = 1.1 R A .C f= 1.44 R A + 2R B ) C t1 = 0.693 (RA + RB) C Output High t2 = 0.693 RBC Output Low t2 t1 6/8 NE556-SA556-SE556 PACKAGE MECHANICAL DATA Plastic DIP-14 MECHANICAL DATA mm. DIM. MIN. a1 B b b1 D E e e3 F I L Z 1.27 3.3 2.54 0.050 8.5 2.54 15.24 7.1 5.1 0.130 0.100 0.51 1.39 0.5 0.25 20 0.335 0.100 0.600 0.280 0.201 1.65 TYP MAX. MIN. 0.020 0.055 0.020 0.010 0.787 0.065 TYP. MAX. inch P001A 7/8 NE556- SA556-SE556 PACKAGE MECHANICAL DATA SO-14 MECHANICAL DATA DIM. A a1 a2 b b1 C c1 D E e e3 F G L M S 3.8 4.6 0.5 8.55 5.8 1.27 7.62 4.0 5.3 1.27 0.68 8 (max.) 0.149 0.181 0.019 8.75 6.2 0.35 0.19 0.5 45 (typ.) 0.336 0.228 0.050 0.300 0.157 0.208 0.050 0.026 0.344 0.244 0.1 mm. MIN. TYP MAX. 1.75 0.2 1.65 0.46 0.25 0.013 0.007 0.019 0.003 MIN. inch TYP. MAX. 0.068 0.007 0.064 0.018 0.010 PO13G Information furnished is believed to be accurate and reliable. However, STMicroelectronics assumes no responsibility for the consequences of use of such information nor for any infringement of patents or other rights of third parties which may result from its use. No license is granted by implication or otherwise under any patent or patent rights of STMicroelectronics. Specifications mentioned in this publication are subject to change without notice. This publication supersedes and replaces all information previously supplied. STMicroelectronics products are not authorized for use as critical components in life support devices or systems without express written approval of STMicroelectronics. The ST logo is a registered trademark of STMicroelectronics (c) 2003 STMicroelectronics - All Rights Reserved STMicroelectronics GROUP OF COMPANIES Australia - Brazil - China - Finland - France - Germany - Hong Kong - India - Italy - Japan - Malaysia - Malta - Morocco Singapore - Spain - Sweden - Switzerland - United Kingdom http://www.st.com 8/8 |
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