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June Revised November One-Shot with Clear and Complementary Outputs. General Description. The DM is a monostable multivibrator featuring both. Inputs A are active-LOW trigger transition. A high immunity.
To obtain optimum and trouble free operation please read. Ordering Code:. Order Number Package Number. Package Description. Connection Diagram. Function Table. Functional Description. The basic output pulse width is determined by selection of. Once triggered the output pulse width is. Pulse width can vary from a. A1 A2. R X and C X combinations. There are three trigger inputs. Operating Rules.
The value of C X may vary from 0 to any nec-. For small time constants use high-quality. For large time constants use solid tan-. If the timing.
The pulse width is essentially determined by external. Figure 1 design curves on t W as function of timing com-. If C X is an electrolytic capacitor a switching diode is. Output pulse width versus V CC and operation tempera-. Figure 4 depicts pulse. Figure 5 details this. Under any operating condition C X and R X must be kept. If the lead length from C X to.
A non-. V CC and ground wiring should conform to good high-. For further detailed device characteristics and output per-. Download DM Datasheet. A high immunity to V CC noise of typically 1. To obtain optimum and trouble free operation please read operating rules and one-shot application notes carefully and observe recommendations. Once triggered the output pulse width is independent of further transitions of the inputs and is func- tion of the timing components.
There are three trigger inputs from the device, two negative edge-triggering A inputs, one positive edge Schmitt-triggering B input. Operating Rules 1. The value of C X may vary from 0 to any nec- essary value. For small time constants use high-quality mica, glass, polypropylene, polycarbonate, or polysty- rene capacitors.
For large time constants use solid tan- talum or special aluminum capacitors. If the timing capacitors have leakages approaching nA or if stray capacitance from either terminal to ground is greater than 50 pF the timing equations may not repre- sent the pulse width the device generates. The pulse width is essentially determined by external timing components R X and C X.
If C X is an electrolytic capacitor a switching diode is often required for standard TTL one-shots to prevent high inverse leakage current Figure 2. Output pulse width versus V CC and operation tempera- tures: Figure 3 depicts the relationship between pulse width variation versus V CC. Figure 4 depicts pulse width variation versus ambient temperature. Figure 5 details this characteristic. If the lead length from C X to pins 10 and 11 is greater than 3 cm, for example, the output pulse width might be quite different from val- ues predicted from the appropriate equations.
A non- inductive and low capacitive path is necessary to ensure complete discharge of C X in each cycle of its operation so that the output pulse width will be accu- rate. V CC and ground wiring should conform to good high- frequency standards and practices so that switching transients on the V CC and ground return leads do not cause interaction between one-shots.
Fur- thermore, the bypass capacitor should be located as close to the V CC -pin as space permits. For further detailed device characteristics and output per- formance please refer to the one-shot application note, AN-
DM74121 multivibrator. Datasheet pdf. Equivalent
June Clear and Complementary Outputs. General Description. The DM54 is a monostable multivibrator featuring. V CC noise of typically 1 5V is also provided by internal cir-. To obtain optimum and trouble free operation please read. Y Triggered from active-high transition or active-low tran-.
DM74121 Datasheet PDF