These devices are precision timing circuits capable of producing accurate time delays or oscillation. In the time-delay or mono-stable mode of operation, the timed interval is controlled by a single external resistor and capacitor network. In the a-stable mode of operation, the frequency and duty cycle can be controlled independently with two external resistors and a single external capacitor.
The threshold and trigger levels normally are two-thirds and one-third, respectively, of VCC. These levels can be altered by use of the control-voltage terminal. When the trigger input falls below the trigger level, the flip-flop is set, and the output goes high. If the trigger input is above the trigger level and the threshold input is above the threshold level, the flip-flop is reset and the output is low. The reset (RESET) input can override all other inputs and can be used to initiate a new timing cycle. When RESET goes low, the flip-flop is reset, and the output goes low. When the output is low, a low-impedance path is provided between discharge (DISCH) and ground.
The output circuit is capable of sinking or sourcing current up to 200 mA. Operation is specified for supplies of 5 V to 15 V. With a 5-V supply, output levels are compatible with TTL inputs. More information: Weight & dimensions | Width | 10.16 mm |  | Depth | 7.11 mm | | Height | 4.57 mm | | Width (with pins) | 10.16 mm | | Height (with pins) | 8.38 mm | | Package depth | 506 mm | | Package width | 13.97 mm | | Package height | 11.23 mm | Features | Type | Precision timer | | Storage temperature (T-T) | -65 - 150 °C | | Number of pins | 8 | | Operating temperature (T-T) | -40 - 85 °C |
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