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SE556F
Philips Semiconductors Linear Products Product specification Dual timer NE/SA/SE556/NE556-1 DESCRIPTION PIN CONFIGURATION Both the 556 and 556-1 Dual Monolithic timing circuits are highly stable controllers capable of producing accurate time delays or oscillation. The 556 and 556-1 are 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 200mA. D, F, N Packages DISCHARGE 2 13 DISCHARGE CONTROL VOLTAGE 3 12 THRESHOLD RESET 4 11 CONTROL VOLTAGE OUTPUT 5 10 RESET TRIGGER 6 9 OUTPUT GND • Turn-off time less than 2µs (556-1) • Maximum operating frequency >500kHz (556-1) • Timing from microseconds to hours • Replaces two 555 timers • Operates in both astable and monostable modes • High output current • Adjustable duty cycle • TTL compatible • Temperature stability of 0.005%/°C • SE556-1 compliant to MIL-STD or JAN 14 THRESHOLD FEATURES 1 7 8 TRIGGER VCC • Pulse generator • Missing pulse detector • Tone burst generator • Pulse width modulation • Time delay generator • Frequency division • Touch-Tone®encoder • Industrial controls • Pulse position modulation • Appliance timing • Traffic light control APPLICATIONS • Precision timing • Sequential timing • Pulse shaping BLOCK DIAGRAM 1 14 13 2 12 DISCHARGE THRESHOLD THRESHOLD COMP CONTROL VOLTAGE RESET COMP 3 11 4 10 TRIGGER GROUND ®Touch-Tone CONTROL VOLTAGE RESET FLIP FLOP FLIP FLOP OUTPUT VCC DISCHARGE 5 6 9 COMP COMP OUTPUT 8 TRIGGER 7 is a registered trademark of AT&T August 31, 1994 353 853-0035 13721
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