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ST NE556/SA556/SE556 GENERAL PURPOSE DUAL BIPOLAR TIMERS Manual

1. NE556 548556 06 BLOCK DIAGRAM THRESHOLD DISCHARGE CONTROL VOLTAGE 1 7 FLIP FLO Qp4 5 N E OUT 1 2 NE556 gt TRIGGER 1 5 INHIBIT RESET SCHEMATIC DIAGRAM CONTROL VOLTAGE THRESHOLD OUTPUT COMPARATOR THRESHOLD 2 TRIGGER RESET DISCHARGE 014 TRIGGER COMPARATOR FLIP FLOP ABSOLUTE MAXIMUM RATINGS Symbol Parameter Value Unit Vcc Supply Voltage 18 V Tj Junction Temperature 150 C Storage Temperature Range 65 to 150 C OPERATING CONDITIONS Symbol Parameter Value Unit Supply Voltage NE556 4 5 to 16 Voc SA556 4 5 to 16 V SE556 4 5 to 18 Vit Vtrig Vcl Vreset Maximum Input Voltage Vcc V Operating Free Air Temperature Range T for NE556 0 to 70 C Oper for SA556 40 to 105 for SE556 55 to 125 2 8 ky NE556 SA556 SE556 ELECTRICAL CHARACTERISTICS Tamb 25 C Voc 5V to 15V unless otherwise specified SE556 NE556 SA556 Symbol Parameter Unit Min Typ Max Min Typ Max Supply Current RL note 1 2 timers Low Stage V
2. DUTY CYCLE OSCILLATOR H 13 1 2 NE556 sesse 2 Output O 34 11 ty 0 693 RA C RB 2RA t2 RARB RA RB CLn RA t 1 88 gt 5 1 t2 gt Trigger Output O 71 MODULATION INPUT Figure 7 High Output Voltage Drop versus Output 2 5 10 20 I oygcefmA Figure 8 Delay Time versus Supply Voltage Figure 9 Propagation Delay versus Voltage Level of Trigger Value NE556 548556 06 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 Discharge 12 Thresh 8 Trigger 5 9g 11 Control Ground F mma mmm C2 O Ground 1 44 ps Ra 2Rg C ASTABLE OPERATION Operating frequency ty 0 693 Ra Rg C Output High to 0 693 RgC Output Low 1 12 gt 4 5 Outpu
3. 180 0 180 480 5 Output rise Time 100 200 100 300 is tf Output Fall Time 100 200 100 300 toff Turn off Time note 9 Veset Voc 0 5 0 5 us 1 Supply current when output is high is typically 1mA less 2 Tested at Voc 5V and 15V 3 This will determine the maximum value of Ra Rg for 15V operation the max total is R 20MQ and for 5V operation the max total R 3 5MQ 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 ky 3 8 NE556 548556 06 Figure 1 Minimum Pulse Width Required for Figure 4 Low Output Voltage versus Output Triggering Sink Current MA Figure 5 Low Output Voltage versus Output Sink Current uk im Figure 6 Low Output Voltage versus Output Sink Current NE556 SA556 SE556 5 8 TYPICAL APPLICATION 50
4. NE556 SA556 6 MSR ARAN 5 GENERAL PURPOSE DUAL BIPOLAR TIMERS DIP14 Plastic Package D SO14 Plastic Micropackage PIN CONNECTIONS top view Discharge 1 Vcc Threshold 2 Discharge Control Voltage 3 Threshold Reset 4 Control Voltage Output 5 Reset Trigger 6 Output GND Trigger 1 8 LOW TURN OFF TIME MAXIMUM OPERATING FREQUENCY GREATER THAN 500kHz TIMING FROM MICROSECONDS TO HOURS OPERATES IN BOTH ASTABLE AND MONOSTABLE MODES HIGH OUTPUT CURRENT CAN SOURCE OR SINK 200mA ADJUSTABLE DUTY CYCLE TTL COMPATIBLE TEMPERATURE STABILITY OF 0 005 PER C DESCRIPTION The NE556 dual monolithic timing circuit is a high ly 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 fre quency and the duty cycle are both accurately controlled with two external resistors and one ca pacitor 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 Temperature Range 1 555 o oome 58555 gt s9o 1996 Hz Dual in Line Package Sd z Small Outline Package S also available in Tape amp Reel DT June 2003 f mA
5. gement 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 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 ky
6. oc 5V 6 10 6 12 loc 15 20 24 20 30 MA High State Voc 45V 4 4 Timing Error monostable Ra 2k to 100kQ 0 10 Initial Accuracy note 2 0 5 2 1 3 Drift with Temperature 30 100 50 ppm C Drift with Supply Voltage 0 05 0 2 0 1 0 5 N Timing Error astable Ra 1kQ to 100kQ C 0 1 15V Initial Accuracy see note 2 1 5 2 25 Drift with Temperature 90 150 ppm C Drift with Supply Voltage 0 15 0 3 SIV Control Voltage Level VcL Voc 15V 96 10 104 9 10 11 V Voc 2 9 3 33 3 8 2 6 3 33 4 Threshold Voltage Vth Vcc 15V 94 10 106 88 10 11 2 V Voc 5V 2 7 3 33 4 2 4 3 33 4 2 Ith Threshold Current note 7 0 1 0 25 0 1 025 pA Trigger Voltage Voc 15V 4 8 5 52 5 5 5 6 V Voc 45V 145 1 67 1 9 11 1 67 22 lrig Trigger Current OV 05 0 9 05 0 pA Vieset Reset Voltage 04 07 1 04 07 1 V Reset Current lreset Vieset 0 4V 0 1 0 4 0 1 0 4 mA M ases OW 0 4 1 04 15 Low Level Output Voltage Vcc 15V loveink 10mA eer E 0 1 5 0 1 0 25 O sink 0 4 0 5 0 4 0 75 VoL lo sink 100mA 2 22 2 25 V lO sink 200mA 2 5 2 5 Var 45V lo sinky 8MA 0 1 0 25 0 3 0 4 Sgt Of sink 0 05 0 2 0 25 0 35 lo sink 5mA High Level Output Voltage SH lo sink 100mA 13 13 3 12 75 13 3 Discharge Pin Leakage Current Discharge pin Saturation Voltage Vas output low note 5 0 dis sat Veo 15V
7. t Control Rt oN Trigger Threshold am Ground Tz214R C1 MONOSTABLE OPERATION Trigger 6 8 NE556 SA556 SE556 PACKAGE MECHANICAL DATA Plastic DIP 14 MECHANICAL DATA mm inch DIM MIN TYP MAX MIN TYP MAX al 0 51 0 020 B 1 39 1 65 0 055 0 065 b 0 5 0 020 b1 0 25 0 010 D 20 0 787 E 8 5 0 335 e 2 54 0 100 e3 15 24 0 600 F 7 1 0 280 5 1 0 201 L 3 3 0 130 Z 1 27 2 54 0 050 0 100 P001A 7 7 8 NE556 SA556 SE556 PACKAGE MECHANICAL DATA SO 14 MECHANICAL DATA mm inch MIN TYP MAX MIN TYP MAX A 1 75 0 068 al 0 1 0 2 0 003 0 007 a2 1 65 0 064 b 0 35 0 46 0 013 0 018 b1 0 19 0 25 0 007 0 010 0 0 5 0 019 c1 45 typ 8 55 8 75 0 336 0 344 5 8 6 2 0 228 0 244 e 1 27 0 050 e3 7 62 0 300 F 3 8 4 0 0 149 0 157 G 4 6 5 3 0 181 0 208 L 0 5 1 27 0 019 0 050 M 0 68 0 026 5 8 max L G gt gt T cl Z gt eV 1 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 infrin

ST NE556/SA556/SE556 GENERAL PURPOSE DUAL BIPOLAR TIMERS Manual

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