DM74121N DATASHEET PDF

DMN datasheet, circuit, data sheet, alldatasheet, Datasheet search site for Electronic Components and Semiconductors, diodes, triacs, and other. DMN One-shot With Clear And Complementary Outputs. The is a monostable multivibrator featuring both positive and negative edge triggering with. Download Fairchild Semiconductor DMN pdf datasheet file.

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DMN Datasheet(PDF) – Fairchild Semiconductor

A critical component is any component of a life support device dm7121n system whose failure to perform can be reasonably expected to cause the failure of the life support device or system, or to affect its safety or effectiveness.

For large time constants use solid tantalum or special aluminum capacitors. An internal 2kX timing resistor is provided for design convenience minimizing component count and layout problems.

Once triggered the output pulse width is independent of further transitions of the inputs and is a function of the timing components. For small time constants use high-quality mica, glass, polypropylene, polycarbonate, or polystyrene capacitors.

A high immunity to VCC noise of typically 1. For CX l pF the output is defined as: Figure 3 depicts the relationship between pulse width variation versus VCC. A non-inductive and low capacitive path is necessary to ensure complete discharge of CX in each cycle of its operation so that the output pulse width will be accurate. Furthermore, the bypass capacitor should be located as close to the VCCpin as space permits.

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Not more than one output should be dm741211n at a time. Figure 4 depicts pulse width variation versus ambient temperature. This device can be used with a single external capacitor. There are three trigger inputs from the device, two negative edge-triggering A inputs, one positive edge Schmitt-triggering B input.

Fairchild Semiconductor – datasheet pdf

National Semiconductor Europe Fax: If CX 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 VCC and operation temperatures: Supply Voltage 7V Input Voltage 5. If the lead length from CX to pins 10 and 11 is greater than 3 cm, for example, the output pulse width might dataxheet quite dm741121n from values predicted from the appropriate equations. An external resistor RX or the internal resistor 2 kX and an external capacitor CX are required for proper operation.

DM74121N PDF Datasheet浏览和下载

The pulse width is essentially determined by external timing components RX and CX. Tsimshatsui, Kowloon Hong Kong Tel: If the timing eatasheet have leakages approaching nA or if stray capacitance from either terminal to ground is greater than 50 pF the timing equations may not represent the pulse width the device generates.

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Figure 5 details this characteristic. The device should not be operated at these limits.

To obtain optimum and trouble free operation please read operating rules and NSC one-shot application notes carefully and observe recommendations. VCC and ground wiring should conform to good high-frequency standards and practices so that switching transients on the VCC and ground return leads datasheeet not cause interaction between one-shots.

The value of CX may vary from 0 to any necessary value.

Pulse width can vary from a few nano-seconds to 28 seconds by choosing appropriate RX and CX combinations. Life support devices or systems are dm7412n1 or systems which, a are intended for surgical implant into the body, or b support or sustain life, and whose failure datazheet perform, when properly used in accordance with instructions for use provided in the labeling, can be reasonably expected to result in a significant injury to the user.

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