UNISONIC TECHNOLOGIES CO., LTD
SA555
Advance
LINEAR INTEGRATED CIRCUIT
PRECISION TIMERS
DESCRIPTION
The UTC SA555 monolithic timing circuit is a highly stable
controller capable of producing accurate time delays or
oscillation. In the time-delay or monostable mode of operation,
the timed interval is controlled by a single external resistor and
capacitor network.
SOP-8
In the astable 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.
DIP-8
The circuit may be triggered and reset on falling waveforms,
and the output structure can source or sink up to 200mA.
Operation is specified for supplies of 5V~15V.
FEATURES
* Astable or monostable operation
* Low turn off time
* Operates in both astable and monostable modes
* Timing from microseconds to hours
* Adjustable duty cycle
* TTL-compatible output can sink or source up to 200Ma
ORDERING INFORMATION
Ordering Number
Lead Free
Package
Packing
Halogen Free
SA555G-S08-R
SA555G-S08-T
SA555G-D08-T
SA555L-S08-R
SOP-8
SOP-8
DIP-8
Tape Reel
Tube
SA555L-S08-T
SA555L-D08-T
Tube
Note: xx: Output Voltage, refer to Marking Information.
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