S-8081B

The S-8081B is a CMOS CR timer developed for appliances and industrial equipment use. It consists of a CR oscillator, a 20-stage divider, a power-on clear circuit, a trigger input chattering rejection circuit, an internal voltage regulator, a level shift circuit, and an output driver.It can be used as a high-precision, long-time monostable timer.

The S-8081B has the following features include:(1)wide power supply operating range:4.5 to 16.5 V;(2)time can be set by external CR;(3)excellent oscillation stability because of built-in voltage regulator;(4)power-on clear circuit is integrated;(5)both trigger I/O inverting operation and set/reset operation  can be performed.At the rise of TRIGGER terminal, OUT level is inverted. When OUT changes from low (Vss) to high (Vdd), frequency dividing operation starts. When OUT changes from high (Vdd) to low (Vs), the internal counter is reset. This terminal has a chattering rejection circuit and a  pull-down resistor built in.

The absolute maximum ratings of the S-8081B are:(1)power supply voltage:18V;(2)storage temperature range:-40 to +125;(3)power disspation:300mW;(4)operating temperature range:-30 to +85.The S-8081B has an accelerating test mode to check its F.F. function in a shorter time.When SET or TRIGGER terminal and RESET terminal are operated with the timing shown in Figure 6,the IC enters the accelerating test mode.That is, OUT goes low faster than preset and tpUT is shorter than the specified time.The products described in this document are designed, developed and manufactured as contemplated for general use, including without limitation, ordinary industrial use, general office use, personal use, and household use, but are not designed, developed and manufactured as contemplated (1) for any use that includes fatal risks or dangers that, unless extremely high safety is secured, could have a serious effect to the public, and could lead directly to death, personal injury, severe physical damage or other loss (i.e., nuclear reaction control in nuclear facility, aircraft flight control, air traffic control, mass transport control, medical life support system, missile launch control in weapon system), or (2) for any use where chance of failure is intolerable (i.e., submersible repeater and artificial satellite).

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