Timer
INTEGRATED CIRCUITS
NE/SA/SE555/SE555C Timer
Product data Supersedes data of 1994 Aug 31
Philips Semiconductors
2003 F...
Description
INTEGRATED CIRCUITS
NE/SA/SE555/SE555C Timer
Product data Supersedes data of 1994 Aug 31
Philips Semiconductors
2003 Feb 14
Philips Semiconductors
Timer
Product data
NE/SA/SE555/SE555C
DESCRIPTION
The 555 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 200 mA.
FEATURES
Turn-off time less than 2 µs Max. operating frequency greater than 500 kHz Timing from microseconds to hours Operates in both astable and monostable modes High output current Adjustable duty cycle TTL compatible Temperature stability of 0.005% per °C
APPLICATIONS
Precision timing Pulse generation Sequential timing Time delay generation Pulse width modulation
PIN CONFIGURATION
D and N Packages
GND 1 TRIGGER 2 OUTPUT 3
RESET 4
8 VCC 7 DISCHARGE 6 THRESHOLD 5 CONTROL VOLTAGE
SL00349
Figure 1. Pin configuration
BLOCK DIAGRAM
VCC 8
R THRESHOLD 6 COMPARATOR
5 CONTROL VOLTAGE
R COMPARATOR R
2 TRIGGER
7 DISCHARGE
FLIP FLOP
4 RESET
ORDERING INFORMATION
DESCRIPTION 8-Pin Plastic Small Outline (SO) Package 8-Pin Plastic Dual In-Line...
Similar Datasheet